Importance

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Abstract

A device for activating and deactivating a load change valve of an internal combustion engine has a camshaft with at least one valve cam and at least one coupling cam. A rocker arm is supported on a stationary engine component and has a sensing member riding on the cam and actuating the load change valve. A coupling lever is movably connected to the rocker arm and is acted on by the coupling cam such that the coupling lever is moved relative to the rocker arm. A coupling device is provided for interrupting movement transmission of the sensing member onto the load change valve. The coupling lever cooperates with the coupling device and the coupling cam such that, when the sensing member rides on a base circle of the valve cam, a movement transmission between the sensing member and the load change valve is at least approximately interrupted. A catch device for securing the coupling lever upon its deflection by the coupling cam is provided for interrupting the movement transmission between the sensing member and the load change valve. The coupling device has a positive locking engagement between the sensing member and the rocker arm, which may be released when the coupling lever is secured by the catch device such that the sensing member is moved by the valve cam relative to the rocker arm.

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First Claim