Research and Development of a Liquid Fuel Injection LPG Engine System Based on a Gasoline Engine(First Report)

-Evaluation of Power, Fuel Consumption and Exhaust Emissions-

Abstract

A technology to convert an existing gasoline MPI engine into an LPG engine with liquid fuel injection (LFI) system was developed. In this report, in order to achieve a good balance between an increase of the engine power and a reduction of the fuel consumption and the exhaust emissions in the LPG engine with LFI system, these performances were evaluated and ignition timing and A/F were optimized. As a result, it was clear that the LPG engine with this system possessed the great potential to improve these performances at high load condition. Moreover, this system could reduce exhaust emissions at partial load compared with the gasoline engine.