Catalytic Converters In Light-duty Gasoline Vehicle

The enforcement of the emission legislation has accelerated the application research and development for automotive emission control technology in China. Under this condition, this paper focuses on the practical situation in Chongqing Changan Automobile Company. First of all, the paper analyzed the emission control technology in different periods in China as well as the world, and summarized the legislation status in Europe, America, Japan and China. Beginning with the construction analysis for exhaust emission catalytic converter, the catalytic converter for "Changan Star" Model SC6350C was designed .For the theoretical research of catalytic converter, this paper has discussed and analyzed the emission reduction principle, muffler noise suppression mechanism, substrate's physical & chemical performance and the durability, and concluded the theoretical principles for the application of exhaust emission control converter. Especially in the research of noise suppression mechanism, a new conception of "equivalent design" for catalytic converter and muffler was revealed, which provided the theoretical basis for the optimization of exhaust noise suppression and engine power loss for light-duty vehicle .The experimental research on emission control catalytic converter has solved the problem of emission control in Changan vehicles, mainly by examining the exhaust emission reduction, noise suppression, physical & chemical performance and durability for SC6350C's converter.