TIMING PHASER CONTROL SYSTEM

摘要

A phaser (22) includes a housing (44) , a rotor (42) , a phaser control valve (36) and a regulated pressure control system (RPCS) . The phaser control valve (36) directs fluid to shift the relative angular position of the rotor relative to the housing (44) . The RPCS has a controller, which provides a set point based on engine parameters . A signal is then produced based on the set point and is sent to the direct control pressure regulator valve. (38) The direct control pressure regulator valve (38) has a supply port (5) and a control port (5) , where the supply port (5) receives a supply fluid pressure from a source and regulates the pressure based on a signal, to a control pressure. The control pressure biases an end of the spool of the phase control valve (36) against a spring (66) , such that the relative angular position of the housing (44) and the rotor (42) is shifted. A method of controlling a phaser (22) is also disclosed.