CAM TORQUE ACTUATED PHASER WITH MID POSITION LOCK

摘要

A cam torque actuated variable cam timing phaser can include a rotor (20) enclosed by an endplate (64) within a housing (10). The housing (10) can have at least one cavity (10a) to be divided by a vane (22) rigidly attached to the rotor (20). The vane (22) can divide the cavity (10a) into a first chamber (16) and a second chamber (18). Passages (26, 28, 56, 58) can connect the first and second chambers (16, 18) facilitating oscillation of the vane (20) within the cavity (10a). A detent valve (50) can move between an open position and a closed position. When in the open position, the detent valve (50) can connect portions of a detent passage (56, 58) extending through the rotor (20) and through the endplate (64) allowing pressurized actuating fluid flow with respect to the first and second chambers (16, 18) in response to a relative angular position of the rotor (20) with respect to the endplate (64). A lock pin (60) can move between a locked position and a released position.