Abstract
Transient engine performance, fuel injection and combustion characteristics of prechamber-type compression ignition engines operated with a composite emulsified fuel (composed of gas oil, water and methanol) were investigated. As a result, response of engine speed of composite fuel operation was found to be the same as the gas-oil operation. However, The start of injection timing under transient running was slower than that of steady-state operation. The retarded and fluctuated start of injection timing was caused by the vibration of the pump axis under transient running and the unstable air content of a composite fuel. Therefore the retarded and fluctuated start of injection timing increased the ignition lag and its fluctuation.
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