The system of electronic controlled LPG multi-point injection was described. This system can improve engine power output and fuel economy as well as avoid the occurrence of the backfire phenomenon. The analysis on the trends of CO, HC and NO_x versus air-fuel ratio and ignition timing was made based on the experimental results. Comparison was made on emission fuelled with gasoline at different engine speed, and the reason of lower emission of LPG engine was analysed. Finally, the emission testing under ECE ...
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