We describe our analytical and experimental works on three novel variable valve actuation systems. These include a mechanical variable-lift and duration concept, a hydraulic-lost-motion variable-lift system, and a valve-deactivation mechanism with unique features. These devices differ in their complexity and versatility but offer a spectrum of design solutions applicable to a range of products. The strengths and weaknesses of these different approaches are discussed and analyzed, and some test results are presented.

Issue Section:
Technical Briefs
Keywords:
actuators, camshafts, design, internal combustion engines, motion control, valves
Topics:
Valves, Camshafts, Design
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Copyright © 2010
 by American Society of Mechanical Engineers
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