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Evaluation of the Fuel Economy Potential of the Low-Heat-Rejection Diesel Engine for Passenger-Car Application
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English
Abstract
Elimination of the conventional cooling system of a diesel engine and the incorporation of structural ceramics for the combustion chamber continues to receive attention worldwide. Application of this concept for a light-duty diesel engine installed in an intermediate-size passenger car is analyzed by computer simulation. The fuel economy of a water-cooled turbocharged DI diesel engine installed in a vehicle is compared to the fuel economy of low-heat-rejection (LHR) turbocharged and turbocompounded DI diesel engines. Appropriate consideration is given for the differences in loading imposed by the vehicle with displacement scaled for equal vehicle acceleration performance. On a combined EPA fuel economy basis, the LHR turbocharged engine is estimated to give 6% better fuel economy and the LHR turbocompounded engine is estimated to give 13% better fuel economy in the LHR vehicle in comparison to the water-cooled turbocharged engine in the baseline vehicle. Given consideration of emissions, driveability, and realistic power turbine efficiencies, achievable fuel-economy gains are expected to be somewhat less.
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Gatowski, J., Jones, J., and Siegla, D., "Evaluation of the Fuel Economy Potential of the Low-Heat-Rejection Diesel Engine for Passenger-Car Application," SAE Technical Paper 870024, 1987, https://doi.org/10.4271/870024.Also In
SAE 1987 Transactions Alternative Engines and Engine Components and Systems
Number: V96-5; Published: 1988-09-01
Number: V96-5; Published: 1988-09-01
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