Hydraulic tappet for IC engine - uses alternately charged pressure chambers connected by closable channels

摘要

The valve drive is for the inlet valves of a piston-driven combustion engine, in which one of the alternately charged pressure chambers (9S; 9F) on the face side of the blocking element (9) is connected with the chamber (41) above the play adjuster (5). The connection is made via one of the channel paths (42 43 or 42S; 43S and 42F; 43F). The obturator ensures that the channels remain closed for the pressure chamber not subject to a pressure charge. ADVANTAGE - Brings the hydraulic tappet to its operating state in the shortest possible time after starting the engine; reduces noise and mechanical wear.