NATURE AND REDUCTION OF CYCLE-TO-CYCLE COMBUSTION VARIATION IN AN IDI DIESEL ENGINE WITH ETHANOL-DIESEL FUEL BLENDS
Many of the promising alternative fuels have relatively low cetane numbers, and may result in combustion variation problems. This paper presents the characteristics of the cycle-to-cycle combustion variations in diesel engines, and analyzes and evaluates the mechanism. Combustion variations appear in various forms, such as variations in ignition lag, indicated mean effective pressure, maximum combustion pressure, or rate of heat release. These variations are clearly correlated, and it is possible to represent the combustion variations by the standard deviation in the combustion peak pressure. The combustion variations are random (non-periodic), and are affected by ethanol amount, intake air temperature, engine speed and other various operating conditions. Theoretical analysis based on auto ignition theory showed that all of these factors affecting the combustion variations could be correlated with ignition lag; a reduction in ignition lag is the most effective to reduce combustion variation.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- International Off-Highway Meeting and Exposition Milwaukee, Wisconsin, September 12-15, 1983.
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- Murayama, T
- YAMADA, T
- MIYAMOTO, N
- Chikahisa, T
- Publication Date: 1983
Media Info
- Features: Figures; References; Tables;
- Pagination: 9 p.
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Alcohol fuels; Combustion; Diesel engines; Diesel fuels; Ethanol; Fuel injection; Ignition
- Old TRIS Terms: Indirect injection
- Subject Areas: Energy; Safety and Human Factors;
Filing Info
- Accession Number: 00381916
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: SAE 831352, HS-036 060
- Files: HSL, USDOT
- Created Date: Mar 30 1984 12:00AM