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VAVACT-Variable Valve Actuation Mechanism
Technical Paper
2003-01-0025
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
When using variable valve actuation mechanisms, accuracy of varying the valve lift and timing at varying engine rotation speeds, loads and temperatures is extremely important when aiming for balanced operation, valve throttling and possible valve deactivation of multi-cylinder engines. Also some wear of the mechanism should not significantly decrease this accuracy of operation. Further the mechanism ought to be compact, and installation of the mechanism should be possible without any initial manual adjusting. In this paper some means are presented, by which the control ramp mechanism, presented previously in the SAE Paper 980768 [1], could be made more compact and by which lower frictional losses and more accurate functioning of this self-adjusting VAVACT-mechanism may be achieved.
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Citation
Järvi, I., "VAVACT-Variable Valve Actuation Mechanism," SAE Technical Paper 2003-01-0025, 2003, https://doi.org/10.4271/2003-01-0025.Also In
References
- Järvi Iikka Variable Valve Timing Mechanism with Control Ramp SAE Paper 980768
- Kreuter Peter Heuser Peter Reinicke-Murman Joachim The Meta VVH System - A continuously Variable Valve Timing System SAE Paper 980765
- Baguéna, M Variable Valve Timing for Four-Stroke Engines 1986