Development Of Catalyst Matching Technology And Catalyst That Make The Motorcycle To Nation â…¢ Emission Standard

After Limits and measurement methods for the emissions of pollutants from motorcycles on the running mode (CHINA stage III)is issued, using catalyst which is as a motorcycle emission controller is an effective method which can meet more and more emission regulation. Catalyst can converse the emissions of pollutants from motorcycles into non-toxic compounds, and reduce emission of CO,HC,NOx.If making between catalyst and motorcycle match perfectly will get lowest emissions and cleaning environment.First of all, this paper discusses the development and generation of catalyst, and introduces the construction performance guide line and evaluation methods of current motorcycle catalyst. On the basis of state of vehicle engine, choosing the fitting type of catalyst for the emission of pollutants from motorcycles; According to characteristics of the emissions of pollutants from motorcycles, analyses the difference between CHINA stageâ…¡and stageâ…¢for catalyst matching technology; Illustrates catalyst proposal for current motorcycles, including the proposal for carburetor,the proposal for EFI and the unique or unusual proposal application characteristics.The paper presents the matching technology on the testing mode that Make the Motorcycle to Nationâ…¢Emission Standard. Completed the test for the performance of test vehicle; analyzed the characteristics of test vehicle engine; tests the temperature distribution of muffler for test vehicle and confirms the location of catalyst installation; tests the raw emission for test vehicle, and set two state of emission for engine:Lower Limit carburetor and upper Limit carburetor; for different state of emission, applies correct catalyst proposal; at last, on the vehicle dynamometer, completes the raw emission test and the test rule for durability of test vehicle which has installed catalyst as an emission controller, and decide the best catalyst proposal.It is obvious that catalyst is the most important after-treatments in motorcycle engine after the test on the motorcycle dynamometer. Making between catalyst and motorcycle match perfectly will reduce the emissions of pollutants from motorcycles and meet CHINA stageâ…¢emission regulation.