The ability to vary the timing of activation of an engine's valves to optimize air flow into and out of the internal combustion engine continuously, is an ability that automakers have long sought for better fuel economy and performance. BorgWarner's Morse TEC Division has pushed the state of this art by developing a continuously variable, vane style camshaft phaser that utilizes camshaft torque energy, not oil pump flow, to actuate the timing device. The design is radically different from the oil pressure actuated phasers that have previously dominated the market, and it offers many important advantages in engine performance and fuel economy through better continuous control of valve timing.
Numerous design patents have been awarded. Innovations start with use of cam torque, an unused source of energy in the engine, to power the device; a closed loop hydraulic system, where hydraulic pressure is created through energy from the camshaft rotational torque; and improved control system software.
The results of this are demonstrated by low power consumption and near instantaneous response across the engine's speed range. Other advantages include a typically 15% lower cost than oil pressure based systems, a 10% increase in engine power, 22% lower NOx emissions, significant improvement in fuel economy, and the ability to be integrated in existing engine platforms without reprogramming engine computers. CTA has changed industry standards for camshaft timing.
BorgWarner Morse TEC is gaining OEM business rapidly. It is in production since mid 2008 in the Ford Duratec V6 engine used in a variety of platforms. Production for the Jaguar 5.0L will began in early 2009.