E-diesel Effects on Engine Component Temperature and Heat Balance in a Cummins C8.3 Engine

Heat rejection, liner temperature, exhaust valve seat temperature, and head gasket temperature data were recorded during a full load torque sweep of a compression ignition engine when fueled by No. 2 diesel and an ethanol/diesel fuel blend containing 10% ethanol by volume. Heat balances were calculated for engine operation at various load-speed combinations.

The results of this study indicated that a greater than expected volume of E-diesel was required to operate the compression ignition engine at the same torque-speed compared to No. 2 diesel. More E-diesel fuel was required due to lower brake thermal efficiencies for E-diesel.

Other than exhaust seat temperatures, there were no appreciable differences in component temperatures measured throughout the engine or the results of the heat balances calculated for the No. 2 diesel and E-diesel fuels.