Patent Application
20240151165
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The disclosure relates to cylinder head devices and more particularly pertains to a new cylinder head device which has two intake valves and a single exhaust valve. The device includes a cam shaft with a pair of intake lobes and a single exhaust lobe. Each of the intake valves is opened by a respective intake lobe and the exhaust lobe is opened by the exhaust lobe. Additionally, the cylinder head has a wedge shaped combustion chamber to accommodate the pair of intake valves and the exhaust valve.
The prior art relates to cylinder head devices including a porting and valve arrangement employing three valves with employ discrete air ports that merge into a common symmetrical outlet. The prior art discloses a cylinder head with a pair of inlet ports and an exhaust port each opening into a common face of the cylinder head. The prior art discloses a cylinder head device that includes a trio of intake valves oriented parallel to each other. The prior art discloses a three valve cylinder head device which includes a pair of intake ports located in opposing quadrants with respect to each other, a fuel injector aligned with a third quadrant and an exhaust valve aligned with a fourth quadrant. The prior art discloses a cylinder head device that includes a pair of intake valves and an exhaust valve each being disposed in a cylindrical combustion chamber.
An embodiment of the disclosure meets the needs presented above by generally comprising a cylinder head that is mountable to an internal combustion engine. The cylinder head has a combustion chamber which has a sloped roof such that the combustion chamber has a wedge shape. Additionally, the cylinder head has an exhaust port and a pair of intake ports. An exhaust valve is movably integrated into the cylinder head for opening and closing the exhaust port. A pair of intake valves is each movably integrated into the cylinder head for opening and closing a respective one of the intake ports. A cam shaft is rotatably disposed on the cylinder head and the cam shaft engages the exhaust valve and each of the intake valves. The cam shaft sequentially opens the exhaust valve and each of the intake valves as the cam shaft rotates for supporting operation of the internal combustion engine.
There has thus been outlined, rather broadly, the more important features of the disclosure in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the disclosure that will be described hereinafter and which will form the subject matter of the claims appended hereto.
The objects of the disclosure, along with the various features of novelty which characterize the disclosure, are pointed out with particularity in the claims annexed to and forming a part of this disclosure.
The disclosure will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
With reference now to the drawings, and in particular to
As best illustrated in
The lower portion 32 lies on a plane that is perpendicularly oriented with a rear side 36 of the outer surface 28 and the upper portion 34 lies on a plane angling toward the rear side 36 between the lower portion 32 and the top surface 26. The front side 30 has a height that is greater than a height of the rear side 36 such that the top surface 26 lies on a plane angling downwardly between the front side 30 and the rear side 36. The combustion chamber 16 extends from the bottom surface 24 toward the top surface 26. Furthermore, the sloped roof 18 of the combustion chamber 16 slopes toward the top surface 26 along an axis which extends between the rear side 36 and the front side 30 of the outer surface 28 of the cylinder head 12. The combustion chamber 16 is centrally positioned on the bottom surface 24 and the combustion chamber 16 has a bounding edge 38 intersecting the bottom surface 24. The bounding edge 38 has a forward side 40, a rearward side 42, a first lateral side 44 and a second lateral side 46. The forward side 40 curves toward the front side 30 of the outer surface 28 of the cylinder head 12 and the rearward side 42 curves toward the rear side 36 of the outer surface 28 of the cylinder head 12.
Each of the intake ports 22 extends through the rear side 36 of the outer surface 28 and through the sloped roof 18 of the combustion chamber 16 to direct an air-fuel mixture into the combustion chamber 16. The exhaust port 20 extends through the front side 30 of the outer surface 28 and through the sloped roof 18 of the combustion chamber 16 to direct exhaust gases outwardly from the combustion chamber 16. The cylinder head 12 has a spark plug opening 48 which extends through the lower portion 32 of the front side of the outer surface 28 of the cylinder head 12 and into the combustion chamber 16 thereby facilitating a spark plug 50 to be threaded into the spark plug opening 48. Additionally, the cylinder head 12 has a plurality of bolt holes 52 each extending through the top surface 26 and the bottom surface 24 thereby facilitating head bolts 54 to be extended through each of the bolt holes 52 for attaching the cylinder head 12 to the internal combustion engine 14.
An exhaust valve 56 is movably integrated into the cylinder head 12 for opening and closing the exhaust port 20 and the exhaust valve 56 is positionable between an open position and a closed position. The exhaust valve 56 has a head 58 and a stem 59 and the stem 59 extends through the cylinder head 12 such that an end 60 of the stem 59 is spaced from the top surface 26 of the cylinder head 12. The head 58 of the exhaust valve 56 is aligned with the exhaust port 20 in the combustion chamber 16 and the head 58 of the exhaust valve 56 rests against the sloped roof 18 of the combustion chamber 16 when the exhaust valve 56 is in the closed position for closing the exhaust port 20. Conversely, the head 58 of the exhaust valve 56 is spaced from the sloped roof 18 when the exhaust valve 56 is in the open position for opening the exhaust port 20.
A pair of intake valves 61 is provided and each of the intake valves 61 is movably integrated into the cylinder head 12 for opening and closing a respective one of the intake ports 22. Each of the intake valves 61 is positionable between an open position and a closed position and each of the intake valves 61 has a head 62 and a stem 64. The stem 64 of each of the intake valves 61 extends through the cylinder head 12 such that an end 66 of the stem 64 of each of the intake valves 61 is spaced from the top surface 26 of the cylinder head 12. The head 62 of each of the intake valves 61 is aligned with a respective one of the intake ports 22 in the combustion chamber 16. The head 62 of each of the intake ports 22 rests against the sloped roof 18 of the combustion chamber 16 when the intake valves 61 are in the closed position for closing the intake ports 22. Conversely, the head 62 of each of the intake valves 61 is spaced from the sloped roof 18 when the intake valves 61 are in the open position for opening the intake ports 22.
A cam shaft 68 is rotatably disposed on the cylinder head 12 and the cam shaft 68 engages the exhaust valve 56 and each of the intake valves 61. The cam shaft 68 sequentially opens the exhaust valve 56 and each of the intake valves 61 as the cam shaft 68 rotates for supporting operation of the internal combustion engine 14. The cam shaft 68 has a pair of intake lobes 70 and an exhaust lobe 72 that is positioned between the intake lobes 70. Furthermore, the exhaust lobe 72 is offset a predetermined angle of rotation with the pair of intake lobes 70. A pair of risers 74 is each removably attached to the top surface 26 of the cylinder head 12. Each of the risers 74 has an upper end 76 which receives the cam shaft 68 such that the cam shaft 68 is spaced from the top surface 26.
A plurality of lifters 78 is provided and each of the lifters 78 has an upper end 80 and a lower end 82 and the lower end 82 of each of the lifters 78 has a well 84 extending toward the upper end 80. The end 66 of the stem 64 of the intake valves 61 and the end 60 of the stem 59 of the exhaust valve 56 is positioned in the well 84 in the lower end 82 of a respective one of the lifters 78. Additionally, the upper end 80 of each of the lifters 78 engages a respective one of the intake lobes 70 and the exhaust lobe 72 on the cam shaft 68. Each of the lifters 78 is individually urged downwardly when the respective intake lobe 70 and exhaust lobe 72 is directed downwardly when the cam shaft 68 rotates. Conversely, each of the lifters 78 is biased upwardly when the respective intake lobe 70 and exhaust lobe 72 is directed upwardly when the cam shaft 68 rotates. A plurality of rocker arms may be provided which extend between respective intake lobes 70 and exhaust lobe 72 and respective lifters 78. In this way the cam shaft 68 can be offset from the intake valves 61 and the exhaust valve 56 while still being in mechanical communication with the intake valves 61 and the exhaust valve 56. Each of the lifters 78 may comprise hydraulic lifters, roller lifters or any other type of conventional valve train lifter.
A valve cover 86 is removably attached to the cylinder head 12 such that the valve cover 86 surrounds the cam shaft 68 and the valve cover 86 has a topmost wall 88, a first lateral wall 90 and a second lateral wall 92. The valve cover 86 has a pair of camshaft openings 94 each extending through a respective one of the first lateral wall 90 and the second lateral wall 92 thereby facilitating the cam shaft 68 to be installed or removed through the camshaft openings 94. The valve cover 86 has a plurality of bolt openings 96 each extending through the valve cover 86 and each of the bolt openings 96 in the valve cover 86 is aligned with a respective one of the risers 74. In this way cam shaft 68 bolts can be extended through a respective one of the bolt openings in the valve cover 86 to attach the risers 74 to the cylinder head 12.
A pulley 98 is attached to a respective end 99 of the cam shaft 68 thereby facilitating a belt 100 to extend around the pulley 98 for rotating the cam shaft 68. The belt 100 may be driven by a crankshaft pulley or other source of rotational torque generated by the internal combustion engine 14. As is most clearly shown in
In use, the cylinder head 12 is mounted to the internal combustion engine 14 and the cam shaft 68 drives each of the exhaust valve 56 and the pair of intake valves 61. The pair of intake valves 61 facilitates increased delivery of air-fuel mixture to the internal combustion engine 14 compared to traditional cylinder heads which employ a single intake valve. The dual intake valves 61 eliminate the need for the intake lobes 70 on the cam shaft 68 to be designed with high degrees of duration or lift as is commonly required with high performance engines associated with competitive racing. In this way the internal combustion engine 14 can operate in a manner that is compatible with day to day driving that is typically not practical with cam shafts which have high degrees of lift and duration. Thus, the internal combustion engine 14 can perform efficiently in both normal driving conditions and high performance driving conditions.
With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of an embodiment enabled by the disclosure, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by an embodiment of the disclosure.
Therefore, the foregoing is considered as illustrative only of the principles of the disclosure. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the disclosure to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the disclosure. In this patent document, the word “comprising” is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be only one of the elements.
