Model-based gasoline engine calibration method

Abstract

The invention provides a model-based gasoline engine calibration method, belongs to the technical field of gasoline engines, and designs and develops a statistical model based gasoline engine calibration method mainly for a dynamic property optimized calibration process of a gasoline engine. The model-based gasoline engine calibration method comprises the following steps: (1), design of test operating points, (2) establishment of a mathematical statistics model and (3), optimization of calibrating procedure design, wherein firstly, relatively fewer test points can be selected in a test design phase so as to reduce workload; then an engine statistical model is established with a mathematical statistics method after related data are acquired; and finally, optimized calibration is performed on the basis of the statistical model. Under the premise that the performance of the gasoline engine is improved without loss of calibration accuracy, the model-based gasoline engine calibration method has the advantages as follows: time is saved, the cost is reduced, the output torque is increased, and the problems that the traditional manual calibration method is time-consuming, labor-consuming and low in efficiency and the conventional automatic optimized calibration equipment is complicated in technology and expensive are solved.

Description

technical field [0001] The invention belongs to the technical field of gasoline engines. Background technique [0002] Engine bench calibration is the basis of vehicle calibration. The purpose of calibration is generally to improve vehicle power, economy, comfort and emission, among which emission performance is a rigid indicator stipulated by national standards and must be passed. At present, domestic calibration technologies vary widely, and the optimization calibration of gasoline engine parameters mainly has the following problems: [0003] 1. Theoretically, the more accurate the calibration of the test working point is, the larger the test working point is required, but this will inevitably increase the calibration workload; however, if there are too few test working points, the engine characteristics cannot be accurately reflected and the calibration effect will be affected , the car's power, economy, emissions, etc. will also become worse. [0004] 2. The traditiona...

AI Technical Summary

Problems solved by technology

Although this method has high calibration efficiency and high precision, the automatic calibration equipment is expensive and the calibration technology is complicated.

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