吉利卓越发动机的诊断与排故

吉利博越发动机的诊断与排故AbstractWith the development of economy and the improvement of people's livingstandards,the number of cars in the country is increasing.With thecontinuous increase,the exhaust emission from automobiles hasincreasingly become the main source of air pollution.The environment isalso deteriorating.At present,in the whole air pollution,automobileexhaust emissionsThis shows the seriousness of automobile exhaustpollution.In the car Of the total emissions,those exceeding thestandard will have a great impact on the environment.ForIn order toeffectively control exhaust emissions,governments of various countrieshave issued policies to limit the tail of vehicles.Gas emission,one ofthe policies is to cause exhaust emission when vehicles age to a certainextent.After reaching a certain limit value,the on-board diagnosissystem shall report the vehicle owner's fault to make a suitable place.Li,this diagnostic system is the exhaust emission on-board faultdiagnosis (OBD)system.Based on the actual development project of theautomobile company,this paper mainly carries out on-board diagnosis ofnew cars.The main contents of the research and development of OBD systemare as follows:1)classify and study OBD system diagnosis according tofunctional modules or component systems The function of each module orcomponent system in vehicle exhaust emission control is analyzedEffectiveness model and its impact on vehicle exhaust emission;2)Establish monitoring indexes and diagnosis of failure modes of variousfunctional modules and componentsStrategy to achieve vehicle onlinemonitoring of these components and systems that affect exhaust emissions;3)Carry out experimental research on catalyst failure monitoring anddevelopment,design diagnostic programlogic,and carry out catalystfailure monitoring and development test,monitoring logic data settingand test According to the analysis of the test data,the durability testof the catalyst failure monitoring system and the state have been passed.The OBD durability and demonstration test completed the final monitoringmodule of vehicle catalyst failure.Data release.The research content ofthis paper,as the latest application-oriented topic in China,is actuallydevelopingIn the process of development,while learning from andabsorbing foreign advanced technology experience,we have also made greatachievements.Valuable test methods and processes have found manytechnical deficiencies for the future similarThe development of theproject provides valuable experience,which can effectively shorten thedevelopment time of the project and improve it.Monitoring strategy,putforward new requirements for related technologies,extend the vehicleparts and systems Service life,reduce energy consumption andenvironmental pollution.Key words:on-board diagnosis,fire,fuel system,start-upOxygen storagecapacity