Research on Calibration Method of Diesel Engine Exhaust Heat Management Based on Prediction Model
Based on a six-cylinder heavy-duty diesel engine,the thermal management areais determinedfrom the dis-charge temperature in the table frame test data,the experimental design is carried out using space filling method,and the bench test is carried out according to the design method to build a predictive model based on Gaussian process regression,The engine NOx and boot emissions are the binding conditions,and the control parameters with the lowest fuel consump-tion are solved with the goal of discharge temperature,and the map of the control parameters is generated for later stage tests.The results of the bench test show in the heat management area that NOx and Soot emissions meet the require-ments,the increase in fuel consumption is within a reasonable range,the average temperature of the steady state test ex-haust gas in the warming mode is raised by around 40℃,and the average temperature of the transient test exhaust gas is raised by about 30℃,and WHTC transient cycle times are reduced.
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