BRIEF EXPLANATION OF DRAWINGS
FIG. 1 is a front view showing a first embodiment of a distribution member used in a fuel distribution pipe structure in accordance with the present invention;
FIG. 2 is a plan view of an upper portion in FIG. 1;
FIG. 3 is a side view of a right side in FIG. 1;
FIG. 4 is a front view showing a first embodiment of an injection valve support member used in the fuel distribution pipe structure in accordance with the present invention;
FIG. 5 is a plan view of an upper portion in FIG. 4;
FIG. 6 is a front view showing a first embodiment of a fuel distribution pipe structure in a multiple throttle body in accordance with the present invention;
FIG. 7 is an upper plan view of a main portion in FIG. 6;
FIG. 8 is a front view showing a second embodiment of the distribution member used in the fuel distribution pipe structure in the multiple throttle body in accordance with the present invention;
FIG. 9 is a plan view of an upper portion in FIG. 8;
FIG. 10 is a front view showing a second embodiment of a first injection valve support member used in the fuel distribution pipe structure in the multiple throttle body in accordance with the present invention;
FIG. 11 is a plan view of an upper portion in FIG. 10;
FIG. 12 is a front view showing a second embodiment of a second injection valve support member used in the fuel distribution pipe structure in the multiple throttle body in accordance with the present invention;
FIG. 13 is a plan view of an upper portion in FIG. 12;
FIG. 14 is a front view showing a second embodiment of the fuel distribution pipe structure in the multiple throttle body in accordance with the present invention;
FIG. 15 is a plan view of an upper portion in FIG. 14;
FIG. 16 is a rear view of FIG. 14;
FIG. 17 is a vertical sectional view of a main portion at a line 100X-100X in FIG. 14;
FIG. 18 is a vertical sectional view of a main portion at a position corresponding to FIG. 17 showing a third embodiment of the fuel distribution pipe structure in the multiple throttle body in accordance with the present invention; and
FIG. 19 is a vertical sectional view of a main portion at a position corresponding to FIG. 17 showing a fourth embodiment of the fuel distribution pipe structure in the multiple throttle body in accordance with the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Embodiment 1
A description will be given below of a first embodiment in accordance with the present invention with reference to FIGS. 1 to 7. FIG. 1 is a front view of a distribution member used in a fuel distribution pipe structure in a multiple throttle body in accordance with the present invention. FIG. 2 is a plan view of an upper portion in FIG. 1. FIG. 3 is a side view of a right side in FIG. 1. A description will be given of a distribution member D with reference to FIGS. 1, 2 and 3. A distribution member D is formed in a thick flange shape, for example, having about 15 mm thickness in which one side end surface 1 forming a flat surface and the other side end surface 2 forming a flat surface are formed in parallel, and the following elements are provided from the one side end surface 1 toward the other side end surface 2. Reference numeral 3 denotes a fuel distribution path provided approximately in a center portion of the distribution member D. A first seal ring groove 4 is provided so as to surround the fuel distribution path 3 open at the other side end surface 2, and a second seal ring groove 5 is provided so as to surround the fuel distribution path 3 open at the one side end surface 1. Reference numeral 6 denotes an injection valve support member mounting hole provided at each of outer sides of the first and second seal ring grooves 4 and 5. The injection valve support member mounting hole 6 is formed so as to have a larger diameter than an outer diameter of a thread mentioned below. Reference numeral 7 denotes a throttle body mounting hole provided at a further outer side of each of the injection valve support member mounting holes 6 and 6. Further, a fuel inflow path 8 is open so as to communicate toward the fuel distribution path. The fuel inflow path 8 in the present embodiment is formed so as to protrude toward an upper side.
Next, an injection valve support member S is formed as follows. FIG. 4 is a front view of the injection valve support member. FIG. 5 is a plan view of an upper portion in FIG. 4. The injection valve support member S is structured such that one side end surface 10 forming a flat surface and the other side end surface 11 forming a flat surface are formed in parallel, and an injection valve support boss 12 is continuously provided in a protruding manner at an outer periphery thereof so as to be along the other side end surface and toward a diagonally lower side. A fuel supply path 13 is provided within the injection valve support member S, one end 13a of the fuel supply path 13 is open at the other side end surface 11, the other end 13b is open at a lower end 12a of the injection valve support boss 12 toward a diagonally lower side, and is open to an injection valve support hole 14 to which a rear end portion of a fuel injection valve mentioned below is inserted. Further, a mounting thread hole 15 and a mounting hole 16 are provided through from the one side end surface 10 toward the other side end surface 11. In FIG. 5, the mounting thread hole 15 is provided at a right side from the one end 13a of the fuel supply path 13, and the mounting hole 16 is provided at a left side from the one end 13a of the fuel supply path 13.
On the other hand, the multiple throttle body is structured such that single throttle body is arranged adjacently side by side. In FIG. 6, one side throttle body T1 is arranged at a left side thereof, and the other side throttle body T2 is arranged at a right side thereof. The one side throttle body T1 is provided with an intake passage 20 so as to pass through an inner portion thereof, and the intake passage 20 is opened and closed by a throttle valve 22 attached to a drive side throttle valve shaft 21. In this case, reference numeral 23 denotes a drive lever arranged at an end portion of the drive side throttle valve shaft 21. The drive lever 23 is coupled to an accelerator grip (not shown) via a valve opening wire and a valve closing wire. Further, an injection valve support hole 24 is provided in one side opposed side wall T1a of the one side throttle body T1 opposing to the other side throttle body T2, and the injection valve support hole 24 is provided at an angle of inclination X to a diagonally lower left side from the one side opposed side wall T1a toward an inner side of the intake passage 20 at a lower side of the throttle valve 22 and a leading end portion of a fuel injection valve mentioned below is arranged so as to be inserted thereto. Further, a distribution member mounting collar portion 25 is formed from the one side opposed side wall T1a of the one side throttle body T1 toward the other side throttle body T2 side. In this case, reference symbol 26a and 26b denote coupling collar portions formed so as to protrude from the one side opposed side wall T1a of the one side throttle body T1 toward the other side throttle body T2 side. The other side throttle body T2 is provided with an intake passage 30 so as to pass through an inner portion, and the intake passage 30 is opened and closed by a throttle valve 32 attached to a driven side throttle valve shaft 31. In this case, reference numeral 33 denotes a driven lever arranged at an end portion of a driven side throttle valve shaft 31. The driven lever 33 is synchronously coupled to the drive lever 23 by a throttle link mechanism L. Further, an injection valve support hole 34 is provided in the other side opposed side wall T2a of the other side throttle body T2 opposing to the one side throttle body T1, the injection valve support hole 34 is provided at the same angle of inclination X as mentioned above to a diagonally lower right side from the other side opposed side wall T2a toward an inner side of the intake passage 30 at the lower side of the throttle valve 32, and a leading end portion of the fuel injection valve mentioned below is arranged so as to be inserted thereto. Further, a distribution member mounting collar portion 35 is formed from the other side opposed side wall T2a of the other side throttle body T2 toward the one side throttle body T1 side. In this case, reference symbols 36a and 36b denote coupling collar portions formed so as to protrude from the other side opposed side wall T2a of the other side throttle body T2 toward the one side throttle body T1 side.
Further, the multiple throttle body is assembled as follows. The one side opposed side wall T1a of the one side throttle body T1 and the other side opposed side wall T2a of the other side throttle body T2 are arranged adjacently so as to be opposed, and a tabular coupling stay 40 and coupling collar portions 26a, 26b, 36a and 36b of the respective throttle bodies T1 and T2 are screwed fixedly by bolts 41, and the drive lever 23 and the driven lever 33 are synchronously coupled by a throttle link mechanism L. Further, the distribution member D is arranged within an adjacent space between the one side opposed side wall T1a of the one side throttle body T1 and the other side opposed side wall T2a of the other side throttle body T2, and is arranged so as to face to the distribution member mounting collar portion 25 of the one side throttle body T1 and the distribution member mounting collar portion 35 of the other side throttle body T2, and bolts 42 are inserted into the throttle body mounting holes 7 and 7, and are screwed to the distribution member mounting collar portions 25 and 35 in this state, whereby the distribution member D is screwed fixedly to the one side throttle body T1 and the other side throttle body T2 between the one side opposed side wall T1a of the one side throttle body T1 and the other side opposed side wall T2a of the other side throttle body T2. In this case, elastic seal rings R such as O-rings or the like are arranged within a first seal ring groove 4 and a second seal ring groove 5 open to the one side end surface 1 and the other side end surface 2 of the distribution member D.
Next, a rear end portion J1 of the other side fuel injection valve Ja is inserted in an airtight manner into the injection valve support hole 14 of the injection valve support member S in the state shown in FIG. 4 (the state that the injection valve support boss 12 protrudes toward a diagonally lower right side in FIG. 4), and the injection valve support member S provided with the other side fuel injection valve Ja mentioned above is arranged so as to be moved toward a diagonally lower right side (shown by reference symbol A in FIG. 6) in FIG. 6 in the state of facing the other side end surface 11 to the one side end surface 1 of the distribution member D. In accordance with the movement in the diagonally lower right direction A mentioned above, the leading end portion J2 of the other side fuel injection valve Ja is inserted in an airtight manner into the injection valve support hole 34 of the other side throttle body T2. On the other hand, the other side end surface 11 of the injection valve support member S moves in the diagonally lower right direction A on the one side end surface 1 of the distribution member D, the mounting thread hole 15 of the injection valve support member S is arranged so as to face to the right injection valve support member mounting hole 6 open at the one side end surface 1 of the distribution member D in the state that the leading end portion J2 of the other side fuel injection valve is completely inserted into the injection valve support hole 34 of the other side throttle body T2, the one end 13a of the fuel supply path 13 is arranged so as to face to the fuel distribution path 3 open at the one side end surface 1 of the distribution member D, and the mounting hole 16 is arranged so as to face to the left injection valve support member mounting hole 6 open at the one side end surface 1 of the distribution member D. In accordance with the structure mentioned above, the other side end surface 11 of the injection valve support member S is arranged on the one side end surface 1 of the distribution member D.
Next, another injection valve support member S as shown in FIG. 5 is prepared, and this injection valve support member S is held in the state of being rotated at 180 degree in the counterclockwise direction, which corresponds to a direction C in FIG. 5, from a state shown by a solid line in FIG. 5. This state is shown by a one-dot chain line in FIGS. 5 and 6. In FIG. 5, the one side end surface 10 exists at an upper position, and the other side end surface 11 exists at a lower position. The injection valve support boss 12 protrudes toward a diagonally lower left side in FIG. 4, and the other side end surface 11 at which the one end 13a of the fuel supply path 13 is open exists in the front side of the paper surface in FIG. 4. Further, in FIG. 4, the rear end portion J1 of the one side fuel injection valve Jb is inserted in an airtight manner into the injection valve support hole 14 open at the lower end 12a of the injection valve support boss 12 in the state of protruding to the diagonally lower left side, and the injection valve support member S provided with the one side fuel injection valve Jb is arranged so as to be moved toward a diagonally lower left side (shown by reference symbol B in FIG. 6) in FIG. 6 in the state of facing the other side end surface 11 to the other side end surface 2 of the distribution member D. In accordance with the movement in the diagonally lower left direction B, the leading end portion J2 of the one side fuel injection valve Jb is inserted in an airtight manner into the injection valve support hole 24 of the one side throttle body T1. On the other hand, the other side end surface 11 of the injection valve support member S is moved in the diagonally lower left direction B on the other side end surface 2 of the distribution member D, the mounting thread hole 15 of the injection valve support member S is arranged so as to face to the injection valve support member mounting hole 6 open at the other side end surface 2 of the distribution member D in the state that the leading end portion J2 of the one side fuel injection valve is completely inserted into the injection valve support hole 24 of the one side throttle body T1, the one end 13a of the fuel supply path 13 is arranged so as to face to the fuel distribution path 3 open at the other side end surface 2 of the distribution member D, and the mounting hole 16 is arranged so as to face to the injection valve support member mounting hole 6 open at the other side end surface 2 of the distribution member D. In accordance with the structure mentioned above, the other side end surface 11 of the injection valve support member S is arranged so as to face to the other side end surface 2 of the distribution member D.
Further, as mentioned above, in the state that the other side end surface 11 of the one injection valve support member S1 is arranged on the one side end surface 1 of the distribution member D, and the other side end surface 11 of the other injection valve support member S2 is arranged on the other side end surface 2 of the distribution member D, a bolt 45 is arranged so as to be screwed toward the injection valve support member mounting hole 6 of the distribution member D and the mounting thread hole 15 of the other injection valve support member S2 from the mounting hole 16 of the one injection valve support member S1. Further, a bolt 46 is arranged so as to be screwed toward the injection valve support member mounting hole 6 of the distribution member D and the thread hole 15 of the other injection valve support member S1 from the mounting hole 16 of the one injection valve support member S2. In this case, the one injection valve support member S1 is called as the lower injection valve support member, and the other injection valve support member S2 is called as the upper injection valve support member in the drawings, for making the description easy.
In accordance with the structure mentioned above, the other side end surface 11 of the one injection valve support member S1 is arranged on the one side end surface 1 of the distribution member D by screwing, the other side fuel injection valve Ja is held between the one injection valve support member S1 and the other side throttle body T2, the other side end surface 11 of the other injection valve support member S2 is arranged on the other side end surface 2 of the distribution member D by screwing, and the one side fuel injection valve Ja is held by the other injection valve support member S2 and the one side throttle body T1.
Further, the fuel inflow path 8 of the distribution member D and a discharge path of a fuel pump (not shown) are coupled by a fuel supply pipe 50, and fuel boosted to a fixed pressure by a fuel pump is supplied toward an inner side of the fuel distribution path 3 of the distribution member D via the fuel supply pipe 50 and the fuel inflow path 8. Further, a part of the fuel supplied into the fuel distribution path 3 is supplied to the other side fuel injection valve Ja from the one side end surface 1 of the distribution member D via the fuel supply path 13 of the one injection valve support member S1, and is injected and supplied into the intake passage 30 of the other side throttle body T2 from the other side fuel injection valve Ja. Further, the other part of the fuel supplied into the fuel distribution path 3 is supplied to the one side fuel injection valve Jb from the other side end surface 2 of the distribution member D via the fuel supply path 13 of the other injection valve support member S2, and is injected and supplied into the intake passage 20 of the one side throttle body T1 from the one side fuel injection valve Jb.
In this case, a replacement and an inspection of the fuel injection valve are executed as follows. First, the bolts 45 and 46 are loosened, and the screwing between the one injection valve support member S1 and the other injection valve support member S2, and the distribution member D is canceled. Further, in the state that the other side end surface 11 of the one injection valve support member S1 is approximately brought into contact with the one side end surface 1 of the distribution member D, the one fuel injection valve support member S1 is pulled up in the diagonally upper left direction as shown by the one-dot chain line A. In accordance with the structure mentioned above, it is possible to take out the leading end portion J2 of the other side fuel injection valve Ja from the injection valve support hole 34, and it is possible to take out the rear end portion J1 from the injection valve support hole 14 of the one injection valve support member S1 in the state mentioned above, whereby it is possible to execute the replacement and the inspection of the other side fuel injection valve Ja. Further, in the state that the other side end surface 11 of the other injection valve support member S2 is approximately brought into contact with the other side end surface 2 of the distribution member D, the other fuel injection valve support member S2 is pulled up in the diagonally upper right direction as shown by the one-dot chain line B. In accordance with the structure mentioned above, it is possible to take out the leading end portion J2 of the one side fuel injection valve Jb from the injection valve support hole 24, and it is possible to take out the rear end portion J1 from the injection valve support hole 14 of the other injection valve support member S2 in the state mentioned above, whereby it is possible to execute the replacement and the inspection of the one side fuel injection valve Jb. In accordance with the structure mentioned above, since it is possible to execute the replacement and the inspection of the one side and other side fuel injection valves Jb and Ja while keeping the one side throttle body T1 and the other side throttle body T2 in the state of being coupled and held by the coupling stay 40 and the distribution member D, it is possible to execute a maintenance work of the fuel injection valve extremely easily and in a short time. Further, since it is possible to execute the maintenance work of the fuel injection valve while keeping the one side and other side throttle bodies T1 and T2 in the coupled state, it is unnecessary to detach the throttle link mechanism and the like arranged astride between both the throttle bodies, and reassemble them.
Further, in a twin throttle body in which the one side throttle body T1 and the other side throttle body T2 are arranged adjacently, the fuel injection valve is generally arranged at each of the opposing one side opposed side wall T1a and the other side opposed side wall T2a of the throttle bodies T1 and T2, and the one side fuel injection valve Jb and the other side fuel injection valve Ja are arranged at the same angle of inclination X with respect to the longitudinal axis of the intake passage. In accordance with the structure mentioned above, it is possible to form the one injection valve support member S1 facing to the other side throttle body T2 and holding the other side fuel injection valve Ja only by preparing the injection valve support member S provided with the injection valve support boss 12 having the angle of inclination X with respect to a vertical line as shown in FIG. 4, and it is possible to form the other injection valve support member S2 facing to the one side throttle body T1 and holding the one side fuel injection valve Jb by rotating such the injection valve support member at 180 degree in a direction C as in FIG. 5. In accordance with the structure mentioned above, it is possible to use the same parts for both the one fuel valve support member S1 with the other injection valve support member S2, and it is possible to provide an inexpensive fuel distribution pipe structure.
Embodiment 2
Next, a description will be given of a second embodiment in accordance with the present invention with reference to FIGS. 8 to 17. FIG. 8 is a front view of a distribution member used in a fuel distribution pipe structure in a multiple throttle body in accordance with the present invention. FIG. 9 is a plan view of an upper portion in FIG. 8. A description will be given of a distribution member 100D with reference to FIGS. 8 and 9. The distribution member 100D is formed by a tabular rigid material (an iron plate, a stainless plate), for example, having a thickness of about 3 mm, in which one side end surface 101 being a flat surface and the other side end surface 102 being a flat surface are formed in parallel, and the following elements are provided from the one side end surface 101 toward the other side end surface 102. Reference numeral 103 denotes a communication hole provided approximately at a center portion of the distribution member 100D. Injection valve support member mounting holes 104 and 104 are provided at both sides of the communication hole 103, and throttle body mounting holes 105 and 105 are provided further at both sides thereof. The distribution member 100D is formed by a press punching.
A first injection valve support member 100S is formed as follows. FIG. 10 is a front view of the first injection valve support member. FIG. 11 is a plan view of an upper portion in FIG. 10. The first injection valve support member 100S is formed by a first mounting collar portion 107 provided with one side end surface 106 forming a flat surface at one side, a fuel inflow boss 108 protruding to the other side from the first mounting collar portion 107, and a first injection valve support boss 109 protruding from the fuel inflow boss 108 including the first mounting collar portion 107 approximately in parallel along the one side end surface 106 and toward a diagonally lower right side in FIG. 3. Further, the first mounting collar portion 107 is provided with mounting holes 110 and 110 through toward the one side end surface and provided with a first fuel communication passage 111 in a concave shape so as to be open toward the one side end surface 106. Further, a fuel inflow path 112 is provided within the fuel inflow boss 108, and the fuel inflow path 112 communicates with the first fuel communication path 111. Further, a fuel supply path 113 is provided within the first injection valve support boss 109, an upper side of the fuel supply path 113 communicates with the first fuel communication path 111, and a lower side thereof communicates with an injection valve support hole 114 open at a lower end 109a of the first injection valve support boss 109. In this case, reference numeral 127 denotes a first seal ring groove provided in a concave shape at the one side end surface so as to surround an outer periphery of the first fuel communication path 111 open at the one side end surface 106.
A second injection valve support member 100P is formed as follows. FIG. 12 is a front view of the second injection valve support member. FIG. 13 is a plan view of an upper portion in FIG. 12. The second injection valve support member 100P is formed by a second mounting collar portion 121 provided with one side end surface 120 forming a flat surface at one side, and a second injection valve support boss 122 protruding toward approximately in parallel along the second mounting collar portion 121 and the one side end surface 120 and toward a diagonally lower right side in FIG. 12. Further, the second mounting collar portion 121 is provided with mounting holes 123 and 123 through toward the one side end surface 120 and provided with a second fuel communication passage 124 in a concave shape so as to be open toward the one side end surface 120. Further, a fuel supply path 125 is provided within the second injection valve support boss 122, an upper side of the fuel supply path 125 communicates with the second fuel communication path 124, and a lower side thereof communicates with an injection valve support hole 126 open at a lower end 122a of the second injection valve support boss 122. In this case, reference numeral 115 denotes a second seal ring groove provided in a concave shape at the one side end surface 120 so as to surround an outer periphery of the second fuel communication path 124 open at the one side end surface 120.
On the other hand, the multiple throttle body is structured such that single throttle body is arranged adjacently side by side. In FIG. 14, the other side throttle body 100T2 is arranged at a right side thereof, and one side throttle body 100T1 is arranged at a left side thereof. The other side throttle body 100T2 is provided with an intake passage 130 so as to pass through an inner portion thereof, and the intake passage 130 is opened and closed by a throttle valve 132 attached to a drive side throttle valve shaft 131. In this case, reference numeral 133 denotes a drive lever arranged at an end portion of the drive side throttle valve shaft 131. The drive lever 133 is coupled to an accelerator grip (not shown) via a valve opening wire and a valve closing wire (the drive lever 133 is shown in FIG. 16). Further, an injection valve support hole 134 is provided at the other side opposed side wall 100T2a of the other side throttle body 100T2 opposing to the one side throttle body 100T1, and the injection valve support hole 134 is provided toward a diagonally lower right side from the other side opposed side wall 100T2a to the intake passage 130 at a lower side of the throttle valve 132 and a leading end of a fuel injection valve mentioned below is arranged so as to be inserted. Further, a distribution member mounting collar portion 135 is formed from the other side opposed side wall 100T2a of the other side throttle body 100T2 toward the one side throttle body 100T1 side. In this case, reference symbol 137 denotes a coupling collar portion formed so as to protrude from the other side opposed side wall 100T2a of the other side throttle body 100T2 toward the one side throttle body 100T1 side. The one side throttle body 100T1 is provided with an intake passage 140 so as to pass through an inner portion thereof, and the intake passage 140 is opened and closed by a throttle valve 142 attached to a driven side throttle valve shaft 141. In this case, reference numeral 143 denotes a driven lever arranged at an end portion of the driven side throttle valve shaft 141. The driven lever 143 is synchronously coupled to the drive lever 133 by a throttle link mechanism 100L (this is shown in FIG. 16). Further, an injection valve support hole 144 is provided at the one side opposed side wall 100T1a of the one side throttle body 100T1 opposing to the other side throttle body 100T2, the injection valve support hole 144 is provided toward a diagonally lower left side from the one side opposed side wall 100T1a to the intake passage 140 which is lower than the throttle valve 142, and a leading end portion of the fuel injection valve mentioned below is arranged so as to be inserted thereto. Further, a distribution member mounting collar portion 145 is formed from the one side opposed side wall 100T1a of the one side throttle body 100T1 toward the other side throttle body 100T2 side. In this case, reference symbol 146 denotes a coupling collar portion formed so as to protrude from the one side opposed side wall 100T1a of the one side throttle body 100T1 toward the other side throttle body 100T2 side.
Further, the multiple throttle body is assembled as follows. The other side opposed side wall 100T2a of the other side throttle body 100T2 and the one side opposed side wall 100T1a of the one side throttle body 100T1 are arranged adjacently so as to be opposed, and a tabular coupling stay 150 and coupling collar portions 137 and 146 of the respective throttle bodies 100T1 and 100T2 are screwed and fixed by bolts 151, and the drive lever 133 and the driven lever 143 are synchronously coupled by a throttle link mechanism 100L. Further, the distribution member D is arranged within an adjacent space between the other side opposed side wall 100T2a of the other side throttle body 100T2 and the one side opposed side wall 100T1a of the one side throttle body 100T1, and is arranged so as to face to a distribution member mounting collar portion 135 of the other side throttle body 100T2 and a distribution member mounting collar portion 145 of the one side throttle body 100T1, and bolts 152 are inserted into the throttle body mounting holes 105 and 105 and screwed to the distribution member mounting collar portions 135 and 145 in this state, whereby the distribution member 100D is screwed and fixed to the other side throttle body 100T2 and the one side throttle body 100T1 between the other side opposed side wall 100T2a of the other side throttle body 100T2 and the one side opposed side wall 100T1a of the one side throttle body 100T1.
Next, a rear end portion 100J1 of the other side fuel injection valve 100Ja is inserted in an airtight manner into the injection valve support hole 114 of the first injection valve support member 100S shown in FIG. 10, and the first injection valve support member 100S provided with the other side fuel injection valve 100Ja mentioned above is arranged so as to be moved toward a diagonally lower right side shown by reference symbol 100A in FIG. 14 in the state of facing the one side end surface 106 thereof to the other side end surface 102 of the distribution member 100D. In accordance with the movement in the diagonally lower right direction 100A mentioned above, the leading end portion 100J2 of the other side fuel injection valve 100Ja is inserted in an airtight manner into the injection valve support hole 134 of the other side throttle body 100T2. On the other hand, the one side end surface 106 of the first injection valve support member 100S moves in the diagonally lower direction 100A on the other side end surface 102 of the distribution member 100D, the mounting thread holes 110 and 110 of the first injection valve support member 100S are arranged so as to face to the injection valve support member mounting holes 104 and 104 of the distribution member 100D in the state that the leading end portion 100J2 of the first fuel injection valve is completely inserted into the injection valve support hole 134 of the other side throttle body 100T2, and the first fuel passage 111 is arranged so as to face to the communication hole 103 of the distribution member 100D. In accordance with the operation mentioned above, the arrangement of the first injection valve support member 100S on the other side end surface 102 of the distribution member 100D is finished.
Next, a rear end portion 100J1 of the one side fuel injection valve 100Jb is inserted in an airtight manner into the injection valve support hole 126 of the second injection valve support member 100P shown in FIG. 12, and the second injection valve support member 100P provided with the one side fuel injection valve 100Jb mentioned above is arranged so as to be moved toward a diagonally lower left side shown by reference symbol 100B in FIG. 14 in the state of facing the one side end surface 120 thereof to the one side end surface 101 of the distribution member 100D. In the operation mentioned above, the one side end surface 120 of the second injection valve support member 100P is brought into contact with the one side end surface 101 of the distribution member 100D by rotating at 180 degree in a direction 100C in FIG. 13. In accordance with the movement in the diagonally lower left direction 100B mentioned above, the leading end portion 100J2 of the one side fuel injection valve 100Jb is inserted in an airtight manner into the injection valve support hole 144 of the one side throttle body 100T1. On the other hand, the one side end surface 120 of the second injection valve support member 100P moves in the diagonally lower direction 100B on the one side end surface 101 of the distribution member 100D, the mounting holes 123 and 123 of the second injection valve support member 100P are arranged so as to face to the injection valve support member mounting holes 104 and 104 of the distribution member 100D in the state that the leading end portion 100J2 of the second fuel injection valve is completely inserted into the injection valve support hole 144 of the one side throttle body 100T1, and the second fuel communication path 124 is arranged so as to face to the communication hole 103 of the distribution member 100D. In accordance with the operation mentioned above, the arrangement of the second injection valve support member 100P on the one side end surface 101 of the distribution member 100D is finished.
Further, as mentioned above, in the state that the one side end surface 106 of the first injection valve support member 100S is arranged on the other side end surface 102 of the distribution member D, and the one side end surface 120 of the second injection valve support member 100P is arranged on the one side end surface 101 of the distribution member 100D, bolts 160 are inserted toward the mounting holes 123 and 123 of the second injection valve support member 100P, the injection valve support member mounting holes 104 and 104 of the distribution member 100D, and the mounting holes 110 and 110 of the first injection valve support member 100S, and nuts 161 are engaged with a protruding end of the bolts 160, whereby it is possible to screw and fix the first injection valve support member 100S and the second injection valve support member 100P to the distribution member 100D. Further, in accordance with the structure mentioned above, the other side fuel injection valve 100Ja is held by the injection valve support hole 134 of the other side throttle body 100T2 and the injection valve support hole 114 of the first injection valve support member 100S, and the one side fuel injection valve 100Jb is held by the injection valve support hole 144 of the one side throttle body 100T1 and the injection valve support hole 126 of the second injection valve support member 100P. On the other hand, the first fuel communication path 111 of the first injection valve support member 100S communicates with the second fuel communication path 124 of the second injection valve support member 100P via the communication hole 103 of the distribution member 100D. In this case, a second seal ring 100R2 is arranged within a second seal ring groove 127 of the first injection valve support member 100S, and a first seal ring 100R1 is arranged within a first seal ring groove 115 of the second injection valve support member 100P, whereby it is possible to keep an airtightness to ambient air between the first fuel communication path 111 and the second fuel communication path 124. In this case, the structure mentioned above is well shown in FIG. 17 corresponding to a horizontal sectional view of a main portion at a line 100X-100X in FIG. 14.
Further, fuel boosted by a fuel pump (not shown) is supplied to the fuel inflow path 112 of the first injection valve support member 100S, and a part of the fuel is supplied to the other side fuel injection valve 100Ja of the other side throttle body 100T2 via the first fuel communication passage 111 and the fuel supply path 113. On the other hand, the remaining fuel within the first fuel communication passage 111 is supplied to the one side fuel injection valve 100Jb of the one side throttle body 100T1 via the communication hole 103, the second fuel communication path 124 of the second injection valve support member 100P and the fuel supply path 125.
In this case, a replacement and an inspection of the fuel injection valve are executed as follows. First, the bolts 160 and the nuts 161 are loosened, and the screwing between the first injection valve support member 100S and the second injection valve support member 100P with respect to the distribution member 100D is canceled. Further, in the state that the one side end surface 106 of the first injection valve support member 100S is approximately brought into contact with the other side end surface 102 of the distribution member 100D, the first fuel injection valve support member 100S is pulled up in the diagonally upper left direction shown by the one-dot chain line 100A. In accordance with the operation mentioned above, it is possible to takeout the leading end portion 100J2 of the other side fuel injection valve 100Ja from the injection valve support hole 134 of the other side throttle body 100T2, and it is possible to take out the rear end portion 100J1 from the injection valve support hole 114 of the first injection valve support member 100S in the state mentioned above, whereby it is possible to execute the replacement and the inspection of the other side fuel injection valve 100Ja. Further, in the state that the one side end surface 120 of the second injection valve support member 100P is approximately brought into contact with the one side end surface 101 of the distribution member 100D, the second fuel injection valve support member 100P is pulled up in the diagonally upper right direction shown by the one-dot chain line 100B. In accordance with the operation mentioned above, it is possible to take out the leading end portion 100J2 of the one side fuel injection valve 100Jb from the injection valve support hole 144 of the one side throttle body 100T1, and it is possible to take out the rear end portion 100J1 from the injection valve support hole 126 of the second injection valve support member 100P in the state mentioned above, whereby it is possible to execute the replacement and the inspection of the one side fuel injection valve 100Jb. In this case, the one-dot chain lines 100A and 100B are shown in FIG. 14. In accordance with the structure mentioned above, since it is possible to execute the replacement and the inspection of the other side and one side fuel injection valves 100Jb and 100Ja while keeping the other side throttle body 100T2 and the one side throttle body 100T1 in the state of being coupled and held by the coupling stay 150 and the distribution member 100D, it is possible to execute a maintenance work of the fuel injection valves extremely easily and in a short time. Further, since it is possible to execute the maintenance work of the fuel injection valves while keeping the first and second throttle bodies 100T1 and 100T2 in the coupled state, it is unnecessary to detach and reassemble the throttle link mechanism and the like arranged astride between both the throttle bodies. Further, since the flat plate having the thickness of about 3 mm is used as the distribution member 100D, it is possible to arrange so as to make closer a distance 100Z between a longitudinal axis 100W-100W of the fuel supply path 113 provided in the first injection valve support boss 109 of the first injection valve support member 100S and a longitudinal axis 100Y-100Y of the fuel supply path 125 provided in the second injection valve support boss 122 of the second injection valve support member 100P, the members being arranged so as to be brought into contact with the other side end surface 102 and the one side end surface 101 of the distribution member 100D respectively, whereby such is preferably applied to a V twin type throttle body used in the V-type engine. The structure mentioned above is disclosed in FIG. 17. Further, since the distribution member 100D can be formed by press punching the thin metal material, it is effective for reducing the manufacturing cost. In this case, the fuel inflow boss 108 including the fuel inflow path 112 may be provided in the second injection valve support member 100P.
Embodiment 3
Next, a description will be given of a main portion of a third embodiment in accordance with the present invention with reference to FIG. 18. In this case, the same reference numerals are attached to the same structural portions as those of the embodiments mentioned above, and a description thereof will be omitted. The one side end surface 106 of the first injection valve support member 100S is arranged on the other side end surface 102 of the distribution member 100D, and at this time, the first fuel communication passage 111 is arranged so as to face to an inner side of the communication hole 103 of the distribution member 100D, and the mounting holes 110 and 110 are arranged so as to face to the injection valve support member mounting holes 104 and 104 of the distribution member 100D. The rear end portion 100J1 of the other side fuel injection valve 100Ja (not shown) is arranged so as to be inserted into the injection valve support hole 114. On the other hand, the one side end surface 120 of the second injection valve support member 100P is arranged on the one side end surface 101 of the distribution member 100D, and at this time, the second fuel passage 124 is arranged so as to face to the inner side of the communication hole 103 of the distribution member 100D, the mounting holes 123 and 123 are arranged so as to face to the injection valve support member mounting holes 104 and 104 of the distribution member 100D, and the rear end portion 100J1 of the one side fuel injection valve 100Jb (not shown) is arranged so as to be inserted into the injection valve support hole 126. Further, in the state mentioned above, a tubular member 170 provided with a through hole in an inner side is arranged so as to be inserted to the first fuel communication passage 111 of the first injection valve support member 100S and the second fuel communication passage 124 of the second injection valve support member 100P. Further, a first annular elastic member 171 such as an O-ring or the like is provided in a compression manner between an outer periphery 170a of one end of the tubular member 170 and an inner periphery 111a of the first fuel communication path 111, and a second annular member 172 such as an O-ring or the like is provided in a compression manner between an outer periphery 170b of the other end of the tubular member 170 and an inner periphery 124a of the second fuel communication path 124. Further, an elastic pressing member 173 such as an O-ring or the like is arranged within the second seal ring groove 127 provided at a concave manner in the one side end surface 106 of the first injection valve support member 100S, and the elastic pressing member 173 is arranged in a compression manner between the one side end surface 106 of the first injection valve support member 100S and the other side end surface 102 of the distribution member 100D. Further, an elastic pressing member 173 is arranged within the first seal ring groove 115 provided in a concave manner at the one side end surface 120 of the second injection valve support member 100P, and the elastic pressing member 173 is arranged in a compression manner between the one side end surface 120 of the second injection valve support member 100P and the one side end surface 101 of the distribution member 100D. Further, reference numeral 174 denotes cylinder collars arranged so as to be inserted into the mounting holes 110 and 110 of the first injection valve support member 100S, the injection valve support member mounting holes 104 and 104 of the distribution member 100D and the mounting holes 123 and 123 of the second injection valve support member 100P. The cylinder collars 174 are formed as mentioned below. The cylinder collars 174 are formed by a metal material such as a stainless steel, an aluminum or the like, and a length H in a longitudinal direction is set to the relation of H≧N, where N is the total thickness of a thickness t1 of the first mounting collar portion 107 of the first injection valve support member 100S, a thickness t2 of the distribution member 100D and a thickness t3 of the second mounting collar portion 121 of the second injection valve support member 100P. In this case, each of the length and the thicknesses has a tolerance in manufacturing thereof, however, the relation H≧N can be maintained even in the case of taking the tolerance into consideration.
Further, the first injection valve support member 100S and the second injection valve support member 100P are formed by injection molding a synthetic resin material such as PA66 or the like.
In accordance with the embodiment mentioned above, in the first injection valve support member 100S arranged on the other side end surface 102 of the distribution member 100D and the second injection valve support member 100P arranged on the one side end surface 101 of the distribution member 100D, the cylinder collars 174 and 174 are arranged within the mounting holes 110 and 110, the injection valve support member mounting holes 105 and 105 and the mounting holes 123 and 123, and are screwed and fixed by bolts 160 inserted into the cylinder collars 174 and 174, and nuts 161 engaged with the protruding ends of the bolts 160. A part of fuel flowing into the first fuel communication path 111 from the fuel inflow path 112 is supplied to the other side fuel injection valve 100Ja from the fuel supply path 113, and the other portion of the fuel within the first fuel communication path 111 is supplied to the one side fuel injection valve 100Jb via the tubular member 170, the second fuel communication path 124, and the fuel supply path 125. Further, at this time, the fuel within the first fuel communication path 111 is held airtight by the first annular elastic member 171 provided in the compression manner between the outer periphery 170a of one end of the tubular member 170 and the inner periphery 111a of the first fuel communication path 111, and the fuel within the second fuel communication path 124 is held airtight by the second annular elastic member 172 provided in the compression manner between the outer periphery 170b of the other end of the tubular member 170 and the inner periphery 124a of the second fuel communication path 124. As mentioned above, in the case of manufacturing the first and second injection valve support members 100S and 100P by using a synthetic resin, a dimensional dispersion tends to be generated at a time of molding in the longitudinal direction of the tubular member 170 (for example, a dispersion is generated in a flatness of the one side end surfaces 106 and 120). However, since the first fuel communication path 111 and the second fuel communication path 124 communicates in the longitudinal direction by the tubular member 170, it is possible to well maintain the airtightness even at the time mentioned above. Further, since it is possible to extremely easily execute control of the hole diameter of the first fuel communication path 111 of the first injection valve support member 100S and the second fuel communication path 124 of the second injection valve support member 100P by a plug gauge in comparison with a control of the flatness of the one side end surfaces 106 and 120, this structure is effective particularly in the case of in the injection valve support member using a synthetic resin material which generates a dimensional dispersion caused by a shrinkage at a time of molding.
Further, since the thickness H of the cylinder collar 174 is set to the relation H≧N, the fastening force generated by the bolts 160 is not directly applied to the first mounting collar portion 107 and the second mounting collar portion 121, at a time of screwing the first and second injection valve support members 100S and 100P to the distribution member 100D via the cylinder collars 174 by the bolts 160 and the nuts 161, and it is possible to well screw the first and second injection valve support members 100S and 100P toward the distribution member 100D. This is effective at a time of forming the first and second injection valve support members 100S and 100P by using a synthetic resin material.
Further, since the thickness H of the cylinder collar 174 mentioned above is set to the relation of H≧N, gaps are formed between the other side end surface 102 of the distribution member 100D and the one side end surface 106 of the first injection valve support member 100S, and between the one side end surface 101 of the distribution member 100D and the one side end surface 120 of the second injection valve support member 100P, and there is the case that rattling is generated between the first and second injection valve support members 100S and 100P and the distribution member 100D when the fuel is not supplied from the fuel inflow path 112, for example, at a time of assembling and carrying. However, the rattling can be dissolved by arranging in the compression manner the elastic pressing members 173 between the one side end surface 106 of the first injection valve support member 100S and the other side end surface 102 of the distribution member 100D, and between the one side end surface 120 of the second injection valve support member 100P and the one side end surface 101 of the distribution member 100D, and such is preferable at a time of forming the first and second injection valve support members 100S and 100P by a synthetic resin material.
In this case, in the present embodiment, at a time of detaching the first injection valve support member 100S and the second injection valve support member 100P from the distribution member 100D, it is necessary to take out a lower half of the tubular member 170 from the first fuel communication path 111 and take out an upper half of the tubular member 170 from the second fuel communication path 124. Since the first and second fuel communication paths 111 and 124 and the injection valve support holes 114 and 126 are positioned so as to be apart at a distance, and the rear end portion 100J1 of the fuel injection valves are inserted to the injection valve support holes 114 and 126 via the elastic members such as O-rings or the like, it is possible to move the one side end surface 106 of the first injection valve support member 100S in a direction 100E for detaching from the other side end surface 102 of the distribution member 100D, and it is possible to move the one side end surface 120 of the second injection valve support member 100P in a direction 100F for detaching from the one side end surface 101 of the distribution member 100D, whereby it is possible to easily separate and move the distribution member 100D and the first and second injection valve support members 100S and 100P. The detaching directions 100E and 100F mentioned above are shown in FIG. 18. In this case, the maintenance work of the fuel injection valves 100Ja and 100Jb can be executed in the same manner as the first embodiment mentioned above.
Embodiment 4
A fourth embodiment is shown in FIG. 19. In this case, the same reference numerals are attached to the same structure portions as those in FIG. 18, and a description thereof will be omitted. An insertion hole 180 is provided in a concave manner so as to be open toward the one side end surface 106 of the first injection valve support member 100S, the fuel inflow path 112 communicates toward a bottom portion of the insertion hole 180, and the fuel supply path 113 heading for the injection valve support hole is branched from the fuel inflow path 112. Further, there is formed an insertion protruding portion 181 inserted into the insertion hole from the one side end surface 120 of the second injection valve support member 100P, and the fuel supply path 125 provided within the second injection valve support member 100P is open at a leading end portion 181a of the insertion protruding portion 181. The one side end surface 106 of the first injection valve support body 100S mentioned above is arranged on the other side end surface 102 of the distribution member 100D, and the insertion hole 180 is arranged in an inner side of the communication hole 103 of the distribution member 100D. On the other hand, the one side end surface 120 of the second injection valve support body 100P is arranged on the one side end surface 101 of the distribution member 100D, and the insertion protruding portion 181 is arranged so as to be inserted into the insertion hole 180 in the inner side of the communication hole 103 of the distribution member 100D. Further, an annular elastic member 182 is arranged in a compression manner between an outer periphery 181b of the insertion protruding portion 181 and an inner periphery 180a of the insertion hole 180. Further, the first and second injection valve support members 100S and 100P in the state mentioned above are screwed and fixed to the distribution member 100D by bolts 160 and nuts 161 in the same manner as the embodiment shown in FIG. 18. In accordance with the structure mentioned above, fuel within the fuel inflow path 112 is supplied to the fuel supply path 113 of the first injection valve support member 100S, the fuel within the fuel inflow path 112 is supplied to the fuel supply path 125 of the second injection valve support member 100P, and the airtightness between the insertion hole 180 and the insertion protruding portion 181 is held by the annular elastic member 182. In accordance with such the embodiment, the structure is preferable for forming the first and second injection valve support members 100S and 100P by a synthetic resin material similarly to the embodiment mentioned above. Particularly, since the tubular member 170 is abolished with respect to the embodiment mentioned above, and the communication of fuel is achieved by the insertion hole 180 integrally formed at the first injection valve support member 100S and the insertion protruding portion 181 integrally formed at the second injection valve support member 100P, it is possible to achieve a reduction of a parts number, and a reduction of an assembling man hour. In this case, it is possible to achieve the operation and effect of the cylinder collar 174 and the elastic pressing member 173 similarly to the embodiment mentioned above. Further, it is possible to execute the maintenance work of the fuel injection valves 100Ja and 100Jb in the same manner as the embodiment mentioned above. Further, the insertion hole 180 may be provided at the second injection valve support member 100P, and the insertion protruding portion 181 may be provided at the first injection valve support member 100S.
Patent Application
20080029062
