Development of a gas-diesel engine injection system using a hydraulically actuated, electronically controlled unit injector (HEUI) for flexible dual-fuel operation

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Development of a gas-diesel engine injection system using a hydraulically actuated, electronically controlled unit injector (HEUI) for flexible dual-fuel operation. Achieving targets for greenhouse gas reduction will require practical, easily implemented alternative fuels for vehicles. Converting existing truck/bus diesel engines to dual-fuel systems using natural gas is important. In particular, for long distance application, these systems need to allow flexible switching from sole diesel to dual-fuel operation and good gas substitution at low loads within cities. An earlier ARC funded project allowed UNSW to develop the world's most compact, flexible HEUI diesel injector. This project aims to develop, test and explore dual-fuel combustion using a compact single unit, combined NG/HEUI injector which will have considerable combustion and operational advantages.