CTA PHASER WITH PROPORTIONAL OIL PRESSURE FOR ACTUATION AT ENGINE CONDITION WITH LOW CAM TORSIONALS

摘要

The present invention is a variable camshaft timing of an internal combustion engine in an engine having at least one camshaft (camshaft) a phaser (phaser), comprises a plurality of vanes (vane) and the spool valve (spool valve) formed within the chamber (chamber) by a housing (housing). The vane forms an advance (advance) and retard chamber (retard) chamber. And at least one of the vanes are driven cam torque (CTA), the other is the oil pressure driven (OPA). The spool valve is connected to the advance chambers formed by the advance and retard chambers, OPA vanes formed by the CTA vanes. When the pager is in the advanced position, the fluid flows along the routes leading to the retard chamber formed by the CTA from the retard chambers formed by the vanes OPA vanes. When the pager is in the retard position, fluid flows along the routes leading to the advance chamber formed by the vanes from CTA CTA retard chamber formed by the vanes. ; cam rotor, cam shafts, housings, Bain , pagers