A photographic study of the combustion of low cetane fuels in a Diesel engine aided with spark assist
An experimental investigation of the ignition and combustion characteristics of two low cetane fuels in a spark assisted Diesel engine is described. A three cylinder Diesel engine was modified for single cylinder operation and fitted with a spark plug located in the periphery of the spray plume. Optical observations of ignition and combustion were obtained with high speed photography. Optical access was provided by a quartz piston crown and extended head arrangement. The low cetane fuels, a light end, low viscosity fuel and a heavy end, high viscosity fuel which were blended to bracket No. 2 Diesel fuel on the distillation curve, demonstrated extended operation in the modified Diesel engine. Qualitative and quantitative experimental observations of ignition delay, pressure rise, heat release, spray penetration and geometery were compared and evaluated against theoretical predictions. Results indicate that controlled combustion of extended fuel blends in a Diesel engine may be possible without inlet air preconditioning and that engine knock may be avoided when heat release is optimized with proper spark and injection timing.
- OSTI ID:
- 5648435
- Report Number(s):
- CONF-860263-
- Resource Relation:
- Conference: Society of Automotive Engineers international congress and exposition, Detroit, MI, USA, 24 Feb 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
DIESEL ENGINES
AUTOMOTIVE FUELS
MODIFICATIONS
DIESEL FUELS
ANTIKNOCK RATINGS
COMBUSTION PROPERTIES
ELECTRIC SPARKS
FUEL SUBSTITUTION
GEOMETRY
HEAT FLOW
HEAT FLUX
IGNITION QUALITY
KNOCK CONTROL
LEADING ABSTRACT
MEETINGS
MIXTURES
OPTIMIZATION
PHOTOGRAPHY
PISTONS
PRESSURE MEASUREMENT
QUARTZ
SPRAYS
TIMING PROPERTIES
VISCOSITY
ABSTRACTS
CHALCOGENIDES
CONTROL
DISPERSIONS
DOCUMENT TYPES
ELECTRIC DISCHARGES
ENGINES
FUELS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MATHEMATICS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
SILICON COMPOUNDS
SILICON OXIDES
025000* - Petroleum- Combustion
330800 - Emission Control- Alternative Fuels
330102 - Internal Combustion Engines- Diesel