Importance

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Abstract

An apparatus for switching off a load change valve of an internal combustion engine has a camshaft with a cam disk and a pivot lever pivotably connected to an engine part and pivoted back and forth by the cam disk. An actuator is moveably guided in the pivot lever for actuating the load change valve. A coupling member moveable in the pivot lever has two end positions defining a coupling and a decoupling position. In the coupling position the coupling member rigidly connects the actuator and the pivot lever. In the decoupling position the coupling member releases the actuator from the pivot lever to switch off the load change valve. A device for moving the coupling member into the coupling position and the decoupling position is provided. It has a coupling cam rotating at a same speed as the cam disk. It also has a coupling lever acting on the coupling member. The coupling cam acts on the coupling lever such that its cam projection moves the coupling member from one end position into the other end position and back into the one end position when the pivot lever follows a base contour of the cam disk. A catch device is arranged such that, when the catch device is activated, a portion of the coupling lever upon actuation by the coupling cam is secured by the catch device so that the coupling member remains in the other end position.

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First Claim