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An apparatus for converting or changing the operation of a charge valve of a combustion engine, which comprises a camshaft with at least one valve cam, a swing lever supported on a machine-mounted component, which comprises a contact element for maintaining a contact member in a disposition on the v

An apparatus for converting or changing the operation of a charge valve of a combustion engine, which comprises a camshaft with at least one valve cam, a swing lever supported on a machine-mounted component, which comprises a contact element for maintaining a contact member in a disposition on the valve cam and which actuates the valve, a coupling member mounted on the swing lever, which, in a first position, translates a movement of the contact member via the valve cam to the swing lever and, in a second position, interrupts the movement translation, and a switch device for moving the coupling member between its first and second positions and retaining apparatus mounted on the swing lever for retaining the coupling member in its second position.

대표청구항 ▼

1. An apparatus for selectively enabling and disabling the operation of a charge valve of an internal combustion engine, comprising:a cam shaft having a rotation axis;a coupling cam and at least one valve cam each mounted to the cam shaft for rotation therewith, the coupling cam and the valve cam ea

1. An apparatus for selectively enabling and disabling the operation of a charge valve of an internal combustion engine, comprising:a cam shaft having a rotation axis;a coupling cam and at least one valve cam each mounted to the cam shaft for rotation therewith, the coupling cam and the valve cam each having a cam profile comprising a follower displacing portion extending to the radially outermost location of the profile relative to the cam shaft rotation axis and a dwell portion at a lesser radial distance from the cam shaft rotation axis than the follower displacing portion;a swing lever having one portion supported on a component of the internal combustion engine;a contact lever movably mounted to the swing lever at a first location thereon spaced from the one portion of the swing lever;contact lever biasing means for biasing the contact lever into contact with the valve cam, the contact lever biasing means having one end connected to the swing lever and another end connected to the contact lever;a coupling member movably supported by the swing lever at a second location thereon spaced from the first location on the swing lever at which the contact lever is movably mounted, the coupling member including a bolt rotatably mounted in the swing lever and the coupling member being movable between a non-interfering position in which the contact lever, in response to engagement thereof by the follower displacing portion of the valve cam, moves, without interference from the coupling member, into contact with the swing lever to thereby impart a movement to the swing lever which enables the operation of the charge valve and a blocking position in which the coupling member blocks contact between the contact lever and the swing lever such that the contact lever cannot impart movement to the swing lever;coupling member biasing means for biasing the coupling member into contact with the coupling cam, the coupling member biasing means having one end connected to the swing lever and another end connected to the coupling member; andmeans for releasably maintaining the coupling member in its blocking position, the follower displacing cam profile portion of the valve cam and the follower displacing cam profile portion of the coupling cam being angularly offset from one another relative to the cam shaft rotation axis such that the follower displacing cam profile portion of the coupling cam displaces the coupling member from its non-interfering position into its blocking position during a rotating movement of the cam shaft during which the contact lever follows the dwell portion of the valve cam. 2. An apparatus according to claim 1, wherein the swing lever includes a pair of swing lever arms at a spacing from one another through which the contact lever moves, the swing lever arms being connected to one another by a flange and the contact lever includes a pair of contact lever arms interconnected to one another by a flange on which is mounted a contact roller adapted for following movement along the cam profile of the valve cam. 3. An apparatus according to claim 2, wherein the contact lever arms are rotatably mounted on the swing lever arms by a bolt, the bolt contacting the charge valve to thereby move the charge valve. 4. An apparatus according to claim 2, wherein the coupling member includes at least one cut out dimensioned to permit movement of the contact lever arms therethrough in the non-interfering position of the coupling member. 5. An apparatus according to claim 1, wherein the means for releasably retaining the coupling member in its blocking position includes an electro-magnet. 6. An apparatus according to claim 1, wherein the means for releasably retaining the coupling member in its blocking position includes an axially displaceable blocking bolt which is axially displaceable into an axially displaced disposition in which the blocking bolt blocks the path of movement of an appendage of the coupling member, the blocking bolt and the appendage of the coupling member cooperating with one another in the axially displaced disposition of the blocking bolt such that the blocking bolt is prevented from movement out of its axially displaced disposition. 7. An apparatus according to claim 1, wherein the cam shaft includes a cylindrical surface which the swing lever follows while the coupling member is in its blocking position. 8. An apparatus according to claim 1, wherein the cam shaft includes an assistance cam which moves the coupling member into a second non-interfering position in which the contact lever moves, without interference from the coupling member, into contact with the swing lever to thereby impart a movement to the swing lever which enables the operation of the charge valve, the assistance cam moving the coupling member into its second non-interfering position at a different angular position of the cam shaft than the angular position of the cam shaft at which the coupling member is moved into its non-interfering position by the coupling cam. 9. An apparatus according to claim 1, wherein the component of the internal combustion engine on which the one portion of the swing lever is supported is a hydraulic compensating element.