Effect of Energy and Emission Constraints on Compression Ratio Advance Product Engineering Engineering Staff General Motors Corporation

Format:

Conference/Event

Author/Creator:

Gumbleton, James J., author.

Conference Name:

1976 Automobile Engineering Meeting (1976-10-18 : Dearborn, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1976

Summary:

This paper describes the results of a study to evaluate the relationship of compression ratio on fuel energy conservation with the constraint of the 1977 Federal emission standards (1.5 HC, 15.0 CO and 2.0 NOx). The influence of the energy losses in the refinery process to produce higher octane fuels was considered as well as the effect of compression ratio on engine efficiency. Two different emission control systems were evaluated; a catalytic converter-EGR system and a manifold reactor-EGR system. These systems were evaluated on six vehicles; three intermediate size with 350 CID engines at compression ratios of 7.4, 8.3 and 9.2:1 and three sub-compact size with 151 CID engines at the same three compression ratios. Based upon total energy conservation, there does not appear to be an incentive for increasing unleaded or leaded fuel octane levels to allow for the use of higher compression ratios with converter-EGR or reactor-EGR control systems at the 1977 Federal emission standards. In addition, the catalytic converter-EGR system appears to provide equal to or improved energy utilization compared to the reactor-EGR control system

Notes:

Vendor supplied data

Publisher Number:

760826

Access Restriction:

Restricted for use by site license