Engine valve timing and stroke adjustment - has stroke control piston spring-loaded against valve in cylinder separate from rocker-supporting cylinder

摘要

The piston (21) of the control unit (19), which is mounted on the cylinder head separate from the supporting cylinder (10), is held by a return spring (22) against the engine valve (9). A regulator (36) controls the flow of the medium under pressure to and from the pressure chamber (16) of the supporting cylinder (10) dependent on the position of the calibration (35). The pressure chamber (16) is in flow communication with the pressure medium supply whereby the regulator can hinder the flow from the chamber so long as the valve stroke remains below the marker (35). Flow of the pressure medium is allowed so long as the valve is opened further than the marker. ADVANTAGE - Simplicity, and stepless control of engine load without throttle butterfly.