The effect of insulated combustion chamber surfaces on direct-injected diesel engine performance, emissions, and combustion
The combustion chamber of a single-cylinder, direct-injected diesel engine was insulated with ceramic coatings to determine the effect of low heat rejection (LHR) operation on engine performance, emissions, and combustion. In comparison to the baseline cooled engine, the LHR engine had lower thermal efficiency, with higher smoke, particulate, and full load carbon monoxide, emissions. The unburned hydrocarbon emission were reduced across the load range. The nitrous oxide emissions increased at some part-load conditions and were reduced slightly at full loads. The poor LHR engine performance was attributed to degraded combustion characterized by less premixed burning, lower heat release rates, and longer combustion duration compared to the baseline cooled engine. 33 refs., 67 figs., 7 tabs.
- Research Organization:
- Southwest Research Inst., San Antonio, TX (USA)
- DOE Contract Number:
- AI01-86CE50162
- OSTI ID:
- 6411652
- Report Number(s):
- DOE/NASA-0330-3; NASA/CR-182204; SWRI-8966; ON: DE89007283
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330102 -- Internal Combustion Engines-- Diesel
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
CERAMICS
CHEMICAL REACTIONS
COATINGS
COMBUSTION
COMBUSTION CHAMBERS
DATA
DIESEL ENGINES
EFFICIENCY
ENGINES
HEAT ENGINES
INFORMATION
INTERNAL COMBUSTION ENGINES
NUMERICAL DATA
OXIDATION
PERFORMANCE
THERMAL EFFICIENCY
THERMAL INSULATION
THERMOCHEMICAL PROCESSES