Front-mounting cam phaser module

摘要

A modular vane cam phaser assembly for controllably and continuously varying the rotational phase between a camshaft and the crankshaft of a reciprocating internal combustion engine. The module includes a housing mountable to the front of an engine head, the housing supporting on an outer surface thereof a programmably-controllable spool valve for directing pressurized oil to an oil commutator extending into both the housing and a vane phaser wherein a rotor is bolted to the camshaft and a stator is bolted to a timing sprocket. The oil is distributed by the spool valve to opposite sides of the rotor vanes in response to signals generated by an induction cam rotation sensor and by other engine components and processed by a powertrain control module to advance or retard the opening of intake and/or exhaust valves in the engine. The housing is provided with internal passages for supplying oil from an engine port to the spool valve. Preferably, the oil is filtered by a thimble screen as it enters the housing.