Abstract
A new and unique dual-fuel injection system has been developed for high speed automotive diesel engines. This system has two features. One is that alternate fuels such as methanol, ethanol and biomass, are directly inducted into the fuel injection pipe through a one-way check valve under pressure, and blended fuels are simultaneously injected into the combustion chamber. The other is that various kinds of fuel can be easily adapted to this system not dependent upon the fuel properties such as viscosity. Using a single cylinder direct injection diesel engine and ethanol as an alternate fuel, injection characteristics and exhaust gas emissions were investigated.
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