The Effects of Crevices on the Engine-Out Hydrocarbon Emissions in SI Engines 940306
To understand the effects of crevices on the engine-out hydrocarbon emissions, a series of engine experiments was carried out with different piston crevice volumes and with simulated head gasket crevices. The engine-out HC level was found to be modestly sensitive to the piston crevice size in both the warmed-up and the cold engines, but more sensitive to the crevice volume in the head gasket region. A substantial decrease in HC in the cold-to-warm-up engine transition was observed and is attributed mostly to the change in port oxidation.
Citation: Min, K., Cheng, W., and Heywood, J., "The Effects of Crevices on the Engine-Out Hydrocarbon Emissions in SI Engines," SAE Technical Paper 940306, 1994, https://doi.org/10.4271/940306. Download Citation
Author(s):
Kyoungdoug Min, Wai K. Cheng, John B. Heywood
Affiliated:
Massachusetts Institute of Technology
Pages: 17
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Global Emission Technology and Analysis-SP-1043, SAE 1994 Transactions: Journal of Engines-V103-3
Related Topics:
Hydrocarbons
Pistons
Seals and gaskets
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