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Fuel Effects on HCCI Operation in a Spark Assisted Direct Injection Gasoline Engine
Technical Paper
2011-01-1763
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The fuel effects on HCCI operation in a spark assisted direct injection gasoline engine are assessed. The low load limit has been extended with a pilot fuel injection during the negative valve overlap (NVO) period. The fuel matrix consists of hydrocarbon fuels and various ethanol blends and a butanol blend, plus fuels with added ignition improvers. The hydrocarbon fuels and the butanol blend do not significantly alter the high or the low limits of operation. The HCCI operation appears to be controlled more by the thermal environment than by the fuel properties. For E85, the engine behavior depends on the extent that the heat release from the pilot injected fuel in the NVO period compensates for the evaporative cooling of the fuel.
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Citation
Cedrone, K., Cheng, W., Chahine, S., Williams, J. et al., "Fuel Effects on HCCI Operation in a Spark Assisted Direct Injection Gasoline Engine," SAE Technical Paper 2011-01-1763, 2011, https://doi.org/10.4271/2011-01-1763.Also In
References
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