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Simulation and Test Results for Several Variable-Valve-Actuation Mechanisms
Technical Paper
2009-01-0229
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
We start our study with a survey of existing variable valve actuation (VVA) devices. We then describe our work, taken place over a time period from 2001 to 2007, on several VVA concepts. All of our projects described include pre-design modeling and simulation. Also, for each one of the proposed designs, a bench-top motorized test fixture was built and ran for proof of concept. Our projects represent a mixture of exploratory research and production-related development work. They can be classified in four broad categories: discrete-step systems; mechanical continuously-variable systems; active stationary-hydraulic lash adjusters; cam-driven hydraulic-lost-motion mechanism. These devices differ in their complexity and versatility but offer a spectrum of design solutions applicable to a range of products. Specific attributes of these different approaches are analyzed and discussed, and some test results are presented.
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Citation
Gecim, B. and Raghavan, M., "Simulation and Test Results for Several Variable-Valve-Actuation Mechanisms," SAE Technical Paper 2009-01-0229, 2009, https://doi.org/10.4271/2009-01-0229.Also In
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