Forecast of Phase IV Emission Standard and Study on Technical Route for Motorcycles

To raise enterprises' consciousness to the emission regulations,the motorcycle emission regulations in China was analyzed combined with the study of WMTC Test Cycle and Euro auto emission STD.The emission regulations STD of Phase IV in the future were predicted.The hnical route of emission control was studied.The feasibility of techniques such as EFI,secondary air injection and catalytic converters was analyzed.Among them,the scheme of EFI system,combined with the catalytic converter and the secondary air injection as well as catalytic converter,can fulfill more advanced emission standards in the future.