The present invention relates to a switching valve (1) for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle, comprising a line section (2) for installation in the gas line, an actuator drive (3) for rotational adjustment of a butterfly valve (11) about an axis of rotation (13) running across the direction of flow inside the line section (2). In the closed position of the butterfly valve (11) a throttle sealing gap (17) is formed radially between a butterfly valve edge (16) and a sealing surface (14) facing the butterfly valve (11) and belonging to a sealing section encompassing the butterfly valve (11) along the butterfly valve edge (16) in the circumferential direction.
Description
The drawings show in schematic diagrams:
FIG. 1 a perspective view of a switching valve,
FIG. 2 a view like that in FIG. 1 but in an exploded diagram and from a different angle of view.
Claims
1. A method for manufacturing a switching valve (1) for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle,
whereby the switching valve (1) has a line section (2) for installation in the gas line and an actuator drive (3) for rotational adjustment of a butterfly valve (11) about an axis of rotation (13) running across the direction of flow inside the line section (2), whereby in a closed position of the butterfly valve (11) a throttle sealing gap (17) is formed radially between a butterfly valve edge (16) and a sealing surface (14) of a sealing section (15) which faces and encompasses the butterfly valve (11) along the butterfly valve edge (16) in the circumferential direction,whereby the throttle sealing gap (17) is manufactured by manufacturing and/or shaping and machining the butterfly valve (11) and/or the sealing surface (14) within the sealing section (15).
2. The method according to claim 1, wherein
the butterfly valve (11) is positioned in a predetermined relative position in the sealing section (15) after its manufacture, whereby the flap (15) and the sealing section (15) are coordinated with one another so that there is a reduced distance radially between the butterfly valve edge (16) and the sealing surface (14) in this starting state with respect to the throttle sealing gap (17),the throttle sealing gap (17) is manufactured by machining the butterfly valve edge (16) and/or the sealing surface (14) with the butterfly valve (11) in position.
3. The method according to claim 1, wherein
the butterfly valve (11) is manufactured by injection molding, whereby the sealing surface (14) functions as a wall section in a casting mold for bordering the butterfly valve edge (16), whereby the casting parameters and the material of the butterfly valve (11) are selected so that the throttle sealing gap (17) is formed by shrinkage in solidification of the butterfly valve material,the sealing surface (14) is manufactured by injection molding, whereby the butterfly valve edge (16) functions as a wall section in a casting mold to border the sealing surface (14), whereby the casting parameters and the material of the sealing surface (14) are selected so that the throttle sealing gap (17) is formed by shrinkage on solidification of the sealing surface material.
4. The method according to claim 1, wherein
the butterfly valve (11) is positioned in a predetermined relative position in the sealing section (15) after its manufacture, whereby the butterfly valve (11) and the sealing section (15) are coordinated with one another so that in this starting state, an enlarged distance prevails radially between the butterfly valve edge (16) and the sealing surface (14) with respect to the throttle sealing gap (17),the throttle sealing gap (17) is produced by heating and plastic deformation of the positioned valve (11).
5. The method according to claim 1, wherein
a sealing body (15) forming the sealing section is manufactured separately from the remaining line section (2) and is added on to the line section (2) only after manufacturing the throttle sealing gap (15).
6. The method according to claim 5, wherein
the sealing body (15) is designed so that it can be used for punching out the butterfly valve (11) from sheeting material.
7. A switching valve for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle,
having a line section (2) for installation in the gas linehaving an actuator drive (3) for rotational adjustment of a butterfly valve (11) about an axis of rotation (13) running across the direction of flow inside the line section (2),whereby a throttle sealing gap (17) is formed in a closed position of the butterfly valve (11) radially between a butterfly valve edge (16) and a sealing surface (14) of the sealing section that faces the butterfly valve (11) and encompasses the butterfly valve (11) along the butterfly valve edge (16) in the circumferential direction,whereby the sealing section is formed by a sealing body (15) manufactured separately from the remaining line section (2) and fixedly added directly onto the line section (2).
8. The switching valve according to claim 7, wherein the sealing body (15) is in contact with the line section (2) on a plane or axial end face (19) in a dividing plane in which the axis of rotation (13) is situated.
9. The switching valve according to claim 7, wherein
the actuator drive (3) has a housing (8),at least a portion (9) of the housing (8) is integrally designed on the line section (2).
10. The switching valve according to claim 7, wherein
the line section (2) has an axially open groove (7) running in a closed form in the circumferential direction to receive an axial gasket and/orthe groove (7) is formed and/or bordered on the inside radially and axially on the flange side (4) that receives the sealing body (15), formed by a step (22) on the sealing body (15) and/orat least one of the flange sides (4) is designed to be planar.
11. The switching valve according to claim 8, wherein
the butterfly valve (11) is a component manufactured separately from a drive shaft (12) of the actuator drive (3) extending coaxially with the axis of rotation (13) in the line section (2) and/orthe butterfly valve (11) is added on to the drive shaft (12).
12. The switching valve according to claim 8, wherein
the throttle sealing gap (17) is manufactured by machining the butterfly valve edge (16) and/or the sealing surface (14) orthe throttle sealing gap (17) is formed by shrinkage of the butterfly valve (11) integrally molded up to the sealing surface (14) orthe throttle sealing gap (17) is produced by heating and plastic deformation of the butterfly valve (11) with radial expansion (16).
Patent Application
20070200080
