HYDRAULIC CIRCUIT FOR VALVE DEACTIVATION

摘要

Methods and systems are provided for deactivating a valve actuation mechanism. In one example, a system may include first and second hydraulic galleries for supplying hydraulic fluid to a switchable roller finger follower, and a third hydraulic gallery for promoting the flow of air away from the first hydraulic gallery. The third hydraulic gallery may receive a restricted flow of oil from a hydraulic restrictor incorporated into an annular clearance between a VCT oil control valve and a mating bore within the cylinder head.

主权项

1. A method for an engine valve deactivation mechanism, comprising:
supplying a first oil pressure to each of a switch of a rocker arm and a pressure relief valve via a priming gallery and a hydraulic lash adjuster oil gallery; and selectively supplying a second oil pressure, greater than the first oil pressure, to the switch of the rocker arm via the hydraulic lash adjuster oil gallery.