Pilot Study Of Small Lpg Single-fuel Engine

The investigations on alternative fuels have become an important direction of engine technique. The central and local governments have worked out a series of policies for developing gas fuel vehicles and promoting its industrialization, in order to protect environment and fully use LPG and NG resources. Therefore, the basal and theory researches on combustion and development of gas engine with low exhaust emission are very pressing and significant. The design of LPG (liquefied petroleum gas) mono-fuel engine based on small bore diesel engine and comprehensive experimental investigations were made first in our country.This paper has two main contents. First, This paper carried on the transformation to one 2100 diesel engine, made it become a LPG mono-fuel SI dedicated engine,and carried on a series of experiments.Second, In order to improve its power, economy and emission, it is necessary to improve burning speed of LPG contraposing its low burning speed. For this reason, designed one structure simple, refit conveniently pre-combustion system, and a small-scale diesel engine was improved and designed into a pre-combustion LPG engine, having unique characteristic. Experiments indicate that this burning system can accelerate speed of burning greatly, raise combustion efficiency and have better power and emission characteristic. There is practical value of popularizing.Systematic engine performance contrast analyzing was carried out based on the two refit schemes' results. And the impact on the engine of the spray nozzle's diameter and of the port performance was discussed emphatically. Through analyzing the test data, drew out some directive and significant conclusion for SI LPG engine's design and application.