Turning device for eccentric shaft of valve drive in IC engines has hydraulic vane cell pump supplied with medium by hydraulic vehicle system

摘要

The device varies the valve stroke, and has a spring element to support power introduction to turn the shaft against valve spring force. It consists of a hydraulically actuated adjusting element (1), with the spring element positioned inside it. The adjusting element is a vane cell pump with at least one blade contained in a hydraulic chamber (7,7'). The blade (6,6') has at least one end stop (14) to limit the valve stroke. The chamber has a feed bore (12,12') and an outlet bore (13,13') for hydraulic fluid supplied by the hydraulic system of the engine.