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.
Simulation and Test Results for Several Variable-Valve-Actuation Mechanisms
Sae Technical Papers
SAE World Congress & Exhibition ; 2009
20.04.2009
Aufsatz (Konferenz)
Englisch
Simulation and test results for several variable-valve-actuation mechanisms
Kraftfahrwesen | 2009
|Kraftfahrwesen | 1991
|Type synthesis of mechanisms for variable valve actuation
Kraftfahrwesen | 1993
|Type Synthesis of Mechanisms for Variable Valve Actuation
SAE Technical Papers | 1993
|CONFERENCES - Variable Valve Actuation
Online Contents | 2007