Fault Analysis And Improvement Scheme Verification Of WP10.270E40 Type Euro Four Emission Diesel Engine

The Stg4 emission regulation was put into action in July 2013 by China government, in order to meet the market demand, upgrading was mad by engine manufacturers in succession on the basis of the existing platform Combustion process in engine cylinder plaies a decisive role to its output torque, fuel economy, vibration noise and pollutant emissions. Through the use of new technique, new technology, after the introduction of the advanced exhaust processing system, forming their own unique diesel engine products with market competitiveness are opportunities and challenges for, domestic and foreign research engineers, especially for the engine production enterprises to face..Taking Weichai WP10.270E40 type heavy duty diesel engine as an example, combined with changes in the country’s four stage engine body from three and usage of SCR processing technical route, on the structure and performance of optimization and adjustment, at the same time, making the related research and beneficial exploration on the four explosion pressure after the upgrade of the oil drain intervals of the influencing factors, the research work made as follows.1. Through the study on NOx formation mechanism, effective measures to reduce the NOx emission was found out. Binding of WP10.270E40 type 4 engine road test effect of verify explosion pressure increase on the reliability of engine was verified, comparison of country four and country three engine problems are analyzed to verify and improve the country four engine.2.By SCR technology and market validation study, the problem of engine processing system and related parts of WP10.270E40 type diesel engine was found and analyzed, the structure design of key parts was optimized.3.Through study of effect of the oil filling capacity, influence of metal elements content on oil, the oil alkali value and viscosity of engine oil on change period of oil, making the long period of oil market validation protocol, and WP10.270E40 type of diesel engine and WP12 heavy duty diesel engine was verified by the small batch Market Road, tracking the quality of oil regularly, and sampling, the influence of the amount of engine research on life cycle of oil, and heavy duty diesel engine oil monitoring elements, index and its change tendency was researched.