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Design and Development of a Variable Valve Timing (VVT) Camshaft
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1974 by SAE International in United States
Annotation ability available
The development of a variable valve timing (VVT) camshaft was initiated as a potential means of controlling exhaust emissions from a spark ignition piston engine. This approach was based on the fact that valve overlap influences internal exhaust gas recirculation which in turn affects spark ignition engine emissions and performance. The design, fabrication, bench tests and engine durability tests of a unit incorporating splines to allow the intake cams to move relative to the exhaust cams is discussed. Preliminary test data from a 350 CID (5700 cm3) engine fitted with the VVT camshaft are discussed with regard to durability and emissions.
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CitationSchiele, C., DeNagel, S., and Bennethum, J., "Design and Development of a Variable Valve Timing (VVT) Camshaft," SAE Technical Paper 740102, 1974, https://doi.org/10.4271/740102.
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