Exploratory study of the low-heat-rejection diesel for passenger-car applications

Book · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5833979

Siegla, D C; Amann, C A

Eliminating the conventional liquid cooling system of a diesel engine to conserve energy normally rejected to that heat sink offers promise as a means for improving fuel economy. Such low-heat-rejection (LHR) diesels have generally been advanced for heavy-duty vehicles. In this study, application of the concept is analyzed for a light-duty indirect-injection diesel of the type used in passenger cars. The naturally aspirated LHR diesel is found to offer no fuel economy advantage, principally because of the deteriorated volumetric efficiency arising from hot cylinder walls. It is found that most of the energy conserved by deleting the cooling system is diverted to the exhaust gas. Methods examined for recovering the lost volumetric efficiency and/or harnessing the increased energy content of the exhaust include supercharging, adding a bottoming cycle, and combining the diesel with turbomachinery. The latter option is judged superior for the passenger-car application.

• OSTI ID: 5833979
• Report Number(s): SAE-TP-840435
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
AUTOMOBILES
BOTTOMING CYCLES
COMPRESSORS
COOLING SYSTEMS
CYLINDERS
DESIGN
DIESEL ENGINES
EFFICIENCY
ENERGY CONSERVATION
ENERGY RECOVERY
ENERGY SYSTEMS
ENGINES
EXHAUST GASES
FLUIDS
FUEL ECONOMY
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GASEOUS WASTES
GASES
HEAT ENGINES
HEAT RECOVERY
HEAT SINKS
INTERNAL COMBUSTION ENGINES
MACHINERY
RECOVERY
SINKS
SUPERCHARGERS
TEMPERATURE EFFECTS
THERMODYNAMIC CYCLES
TURBOMACHINERY
VEHICLES
VOLUME
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES