A Mechanical Valve System with Variable Lift, Duration, and Phase Using a Moving Pivot

970334

02/24/1997

Event
International Congress & Exposition
Authors Abstract
Content
A novel mechanism using a moving rocker pivot has been developed by Motive Engineering. The chosen approach offers variation of lift, duration, and phase. A compact, robust proof-of-concept mechanism has been designed, and fabricated. It was fitted to the intake valvetrain of a production SOHC four-cylinder engine. The operation of the mechanism is described. A longer-duration, higher-lift camshaft was designed to explore the potential benefits of the concept throughout the speed and load range. Dynamometer testing has been done to explore possible benefits to power, fuel economy, and exhaust emissions.
Meta TagsDetails
DOI
https://doi.org/10.4271/970334
Pages
19
Citation
Riley, M., McElwee, M., and Wakeman, R., "A Mechanical Valve System with Variable Lift, Duration, and Phase Using a Moving Pivot," SAE Technical Paper 970334, 1997, https://doi.org/10.4271/970334.
Additional Details
Publisher
Published
Feb 24, 1997
Product Code
970334
Content Type
Technical Paper
Language
English