Effect of the level of unsaturation and of alcohol modifications of plant oil fuels on the long-term performance of a direct injected diesel engine
A 200-hour durability screening test recommended by the Engine Manufacturers Association was adopted to study the effects of four alternate fuels on the long-term performance of a four cylinder, direct injected diesel engine. Tested fuels included diesel fuel (control), a 25-75 blend by volume of alkali-refined sunflower oil and diesel fuel, a 25-75 blend by volume of high oleic safflower oil and diesel fuel, a nonionic sunflower oil-aqueous ethanol microemulsion, and a methyl ester of sunflower oil. Least squares regression procedures were used to analyze the long term effects of the test fuels on engine performance and to compare the test fuels. Time of the engine operation had a significant effect only on exhaust temperature. For all other response variables, time was not a factor. However, significant differences between tested fuels were observed. An analysis of variance was employed to compare CRC carbon and lacquer ratings, as well as wear of engine parts. The carbon deposits produced by the microemulsion and the 25-75 sunflower oil blend were significantly heavier than those generated by the other tested fuels. None of the fuels produced excessive engine wear. The 25-75 sunflower oil blend and the microemulsion caused problems with the fuel injection system.
- Research Organization:
- North Dakota State Univ., Fargo (USA)
- OSTI ID:
- 5504005
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DIESEL ENGINES
SYNTHETIC FUELS
ESTERS
ETHANOL
MIXING
PERFORMANCE
REGRESSION ANALYSIS
SUNFLOWER OIL
ALCOHOLS
ENGINES
FUELS
HEAT ENGINES
HYDROXY COMPOUNDS
INTERNAL COMBUSTION ENGINES
MATHEMATICS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
STATISTICS
VEGETABLE OILS
330102* - Internal Combustion Engines- Diesel