Method for calibrating electrically controlled diesel engine

Abstract

The invention relates to a method for calibrating an electrically controlled diesel engine. The software AutoNOx inputs the emission values of nitrogen oxides at each working condition point in an automatically allocated emission region of the electrically controlled diesel engine according to the complete vehicle running features and the like, the AutoNOx software automatically completes the calculation of the emission design values of nitrogen oxides at each working condition point in an engine emission control region according to the factors of engine operating cycle working condition, thetarget torque curve, the complete engine reliability and the like, the calculation result is used as the emission target of one-dimensional thermodynamics GT-Power engine model, and the GT-Power software obtains the main calibration parameters of the engine through internal computations to form basic calibration in the emission control region of the electrically controlled diesel engine. The method is applicable to the development of performance and emission of various electrically controlled diesel engines, and optimal balance between emission and fuel economy in actual working condition is realized.

Description

technical field [0001] The invention relates to a calibration method of a diesel engine, in particular to a calibration method of an electronically controlled diesel engine. Background technique [0002] The balance between emissions and fuel economy is very important during engine development. Although the ESC (European Steady Cycle) test in GB17691-2005 stipulates limits for the weighted calculation results of nitrogen oxide emission values ​​at 13 operating points, there is no specific limit for the nitrogen oxide emissions at each operating point. limit. The combustion parameters of each working condition of the electronically controlled diesel engine can be adjusted flexibly, so that the nitrogen oxide emission value can be reasonably allocated according to the use requirements, and the balance between the total emission and the fuel economy in the common working condition area can be achieved. The fuel economy of the whole vehicle is directly related to the character...

AI Technical Summary

Problems solved by technology

The operating time weight of each operating point of the ESC obtained from the actual operating data of the engine and the reliability risk coefficient of each operating point corresponding to the mechanical limit of the model are used as the calculation elements of nitrogen oxides, supplemented by the output of thermodynamic simulation simulation software to meet the emission requirements. It is an efficient calibration method for the performance of electronically controlled diesel engines, and there is no such report yet

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