Efficiency and Emissions of a Stratified Charge Engine Optimized for Various Fuels 780236
Experimental work was done with a Texaco stratified-charge engine to investigate the effect of fuel type, spark timing, and fuel injection timing on efficiency and emissions. Gasoline, diesel fuel, and a mixture of the two in equal proportions were used as fuels. The mixture of gasoline and diesel fuel simulates a broad-boiling-range fuel, referred to as “broadcut fuel.” Data were taken during full-load and part-load operations; the part-load operation simulated road-load conditions for a 3,000-lb vehicle. Results show engine efficiency ranges from about 20% at light-load to over 30% at full-load. The difference in efficiency attributable to fuel type was one to two percent. Between the two fuels gasoline and diesel, greater efficiency was associated with diesel fuel at part-load while the greater efficiency at full-load was seen with gasoline. Broadcut fuels generally resulted in efficiencies similar to the efficiencies of operation with diesel fuel at part-load or with gasoline at full-load.
The results for all fuels show that spark timing set equal to fuel injection timing generally produced the best efficiency and, except for nitrogen oxides, the lowest emissions.
Citation: Evers, L., Fleming, R., and Hurn, R., "Efficiency and Emissions of a Stratified Charge Engine Optimized for Various Fuels," SAE Technical Paper 780236, 1978, https://doi.org/10.4271/780236. Download Citation
Author(s):
L.W. Evers, R.D. Fleming, R.W. Hurn
Affiliated:
UNITED STATES DEPARTMENT OF ENERGY BARTLESVILLE ENERGY RESEARCH CENTER BARTLESVILLE, OKLAHOMA 74003
Pages: 12
Event:
1978 Automotive Engineering Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Stratified charge engines
Diesel fuels
Engine efficiency
Fuel injection
Nitrogen oxides
Gasoline
Energy conservation
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