Hydraulic circuit for a valve operating mechanism for an internal combustion engine

摘要: A hydraulic circuit for a valve operating mechanism an internal combustion engine which has plurality of intake or exhaust valves normally urged in closing direction, adjacent rocker arms associated respectively with the and pivotably supported on shaft. The are pivotable by cams rotatable synchronism crankshaft. coupling is provided arm selectively interconnecting disconnecting response to oil pressure. supplies pressure means feed passage lubricates cams. connected series each other through flow restriction includes directional control changing direction lubricating supplied from pump cause during low-speed operation high-speed said always provide proper levels circuit.