Valve operation control device for a motor vehicle combustion engine, especially a diesel engine, has a hydraulic damping choke for controlling valve-closing speed so that it is matched to engine speed and loading

摘要

Device for controlling at least an opening cross-section in a cylinder of a combustion engine has a gas exchange valve (10) with a valve member (12) that is raised and lowered by means of a valve actuator (20) to close and open the valve. During closing of a valve a valve brake (31) in the form of a hydraulic damping element with a choke opening (33) is controlled by a control unit (34) that controls the choke cross section dependent on engine speed.