A Camshaft Torque Actuated Vane Style VCT Phaser

BorgWarner has developed a continuously variable vane style VCT camshaft phaser that, differing from the oil pressure actuated phasers in production, utilizes camshaft torque energy, not oil pump flow, to actuate. This VCT phaser has several distinct advantages, low oil flow requirements and fast response rates even at low RPM. The low oil flow requirement, allows this Cam Phaser to easily adapt to existing engine platforms without major engine modifications or increases in oil pump size. For new engine designs a smaller oil pump can be selected and thereby improve overall engine efficiency. Since the phaser responds to camshaft torque energy and actuates independent of oil pressure, fast response rates are available from idle on up through the engine operating range, allowing the engine calibrator to adopt a more aggressive approach to camshaft timing. Low oil flow requirements, fast response rates at all RPM and minimal engine modifications are all advantages of this new VCT cam Phaser.