The Effects of Combustion Chamber Design and Compression Ratio on Emissions, Fuel Economy and Octain Number Requirement Toyota Motor Company

Format:

Conference/Event

Author/Creator:

Matsumoto, K., author.

Conference Name:

1977 International Automotive Engineering Congress and Exposition (1977-02-28 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1977

Summary:

Four combustion chamber designs and three compression ratios (8:1, 9:1, and 10:1) were investigated for their emission, fuel economy, and octane number requirement characteristics using a 1.6 L (96.9 CID) 4-cyl engine. Time resolved measurement of hydrocarbon emissions was carried out to clarify the reason for differences in tail pipe emission between these combustion chambers. The "High Turbulence Type" combustion chambers, which included swirl (piston swirl) and/or squish, indicated better fuel economy under emission and octane number requirement constraints. The HC emission of the combustion chamber with squish and swirl was lower than that of the combustion chambers with squish alone. The time resolved measurement of HC emissions explained the difference in the exhaust process of these unburned hydrocarbons. A compression ratio of 9:1 was the best compromise for optimum fuel economy with this high turbulence combustion chamber, under the target constraints for HC and NOx emissions assumed for these tests

Notes:

Vendor supplied data

Publisher Number:

770193

Access Restriction:

Restricted for use by site license