Variable cam timing technology

  • 04-Mar-2009 03:59 EST

Featured on the all-new Jaguar 5.0-L AJ-V8 Gen III engine, BorgWarner’s cam torque actuated (CTA) variable cam timing (VCT) technology improves fuel economy and reduces emissions. The technology also improves engine responsiveness and performance feel. Unlike traditional cam phasing methods that typically use engine oil pressure to phase the camshaft, CTA technology captures the existing torsional energy in the valvetrain to accomplish this event, similar to a hydraulic ratchet. CTA cam phasers operate more quickly and under a wider range of engine speeds and temperatures than traditional oil-pressure actuated cam phasers. These factors allow CTA variable cam timing to more efficiently improve fuel economy, reduce emissions, and increase horsepower.
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