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Lubrication Technology and Analysis for Variable Valve Event and Lift (VVEL) System
Technical Paper
2009-01-1837
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new Variable Valve Event and Lift (VVEL) system has been developed as an effective technology for reconciling environmental performance such as lowering the fuel consumption and exhaust emissions with driving performance. This system can continuously vary both the intake valve lift and event angle (valve opening duration) over a wide operating range to flexibly control the valve timing and lift for a substantial improvement in engine performance. In developing the variable valve lift control system, the essential merit is based on the fundmental configuration of multiple-link mechanism. However, it is required to resolve tribological issues for the specific mechnism.
This paper describes the structure of the VVEL system and its operating and motion conversion principles. It also explains the mechanism analysis, dynamic stress analysis and lubrication simulation techniques used in developing the VVEL system, the materials adopted and the surface treatment techniques applied.
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Citation
Akasaka, Y., Kiga, S., Kobayashi, M., and Watanabe, D., "Lubrication Technology and Analysis for Variable Valve Event and Lift (VVEL) System," SAE Technical Paper 2009-01-1837, 2009, https://doi.org/10.4271/2009-01-1837.Also In
References
- Akasaka Y. et al “Development of a Continuously Variable Valve Event and Lift (VVEL) System,” JSAE Scientific Lecture Series, 20075619
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- Nakamura M. Hara S. Yamada Y. Takeda K. Okamoto N. Hibi T. Takemura S. Aoyama S. “A Continuously Variable Valve Event and Lift Control Device (VEL) for Automotive Engines” SAE Paper 2001-01-0244
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