Design of a Continuously Variable Cam Phasing ( CVCP ) System for Emissions, Fuel Economy, and Power Improvement

The paper will detail the construction of the overall CVCP system, and the components. The emphasis will be on the phaser construction. The phaser is designed to provide extended durability (minimized spline stress, active lash compensation), simplifed manufacture and assembly, minimized package size (diameter & length), and good dynamic stability.

The discussion of the overall CVCP system will include control valve geometry, and oil passages from the oil pump to the phaser.

The paper will then discuss the different applications of VCP, and the advantages of each in terms of idle stability, torque, emissions (NOx & HC), and fuel economy.