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-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
025000* -- Petroleum-- Combustion
33 ADVANCED PROPULSION SYSTEMS
330102 -- Internal Combustion Engines-- Diesel
330800 -- Emission Control-- Alternative Fuels
ABSTRACTS
ANTIKNOCK RATINGS
AUTOMOTIVE FUELS
CHALCOGENIDES
COMBUSTION PROPERTIES
CONTROL
DIESEL ENGINES
DIESEL FUELS
DISPERSIONS
DOCUMENT TYPES
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ENGINES
FUEL SUBSTITUTION
FUELS
GEOMETRY
HEAT ENGINES
HEAT FLOW
HEAT FLUX
IGNITION QUALITY
INTERNAL COMBUSTION ENGINES
KNOCK CONTROL
LEADING ABSTRACT
MATHEMATICS
MEETINGS
MINERALS
MIXTURES
MODIFICATIONS
OPTIMIZATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PHOTOGRAPHY
PISTONS
PRESSURE MEASUREMENT
QUARTZ
SILICON COMPOUNDS
SILICON OXIDES
SPRAYS
TIMING PROPERTIES
VISCOSITY