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Variation of Both Symmetric and Asymmetric Valve Events on a 4-Valve SI Engine and the Effects on Emissions and Fuel Economy
Technical Paper
2000-01-1222
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
Mechanisms exist to vary valve lift, duration and phasing either simultaneously or individually but it remains a challenge to find the optimum settings. An experimental investigation involving a statistical approach has been applied to a 4-litre, 90° vee-8, 4-valve engine in which intake valve lift, duration and phasing were chosen as variables along with exhaust valve phasing. The intake valves were operated symmetrically for the first phase of testing, but subsequently asymmetric operation was also investigated. The results indicated possible strategies that could be applied to reduce emissions.
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Citation
Ghauri, A., Richardson, S., and Nightingale, C., "Variation of Both Symmetric and Asymmetric Valve Events on a 4-Valve SI Engine and the Effects on Emissions and Fuel Economy," SAE Technical Paper 2000-01-1222, 2000, https://doi.org/10.4271/2000-01-1222.Also In
References
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