The Research And Development On Retrofitting The Carburetor Engine To Electronic Fuel Injection Engine

In order to meet the ever improved requirements by the regulations of the national environment protection,the research and development on the retrofitting the carburetor engine to electronic fuel injection engine is described in this paper. The engineering plan and development goal are established. The factors that have effect on the car's emission such as cleaning inside engine,size of three-way catalytic converter and leakage of exhaust system etc have been tested and analyzed,and some related parameters are determined. In order to ensure that the emission meets the requirements of the Euro II standard at one time,to pass the examination of 80000km durability,and to achieve excellent performance indicator while assuring the emission requirements,the design of intake manifold and camshaft profile is optimized,the test of engine performance and car's emission and environment performance have been conducted.Through comparison by test,it is shown that the carburetor engine after retrofitting to electronic fuel injection engine has achieved good level in terms of emission and performance,and has been upgraded to the same level as the engine of Japan Mitsubishi and Suzuki.