Engine ECU (electronic control unit) circuit fault diagnosis method

Abstract

The invention relates to an engine ECU (electronic control unit) circuit fault diagnosis method, and belongs to the technical field of an engine. The method comprises the following steps that 1, a neural network topology structure is built, and a BP neural network input-output mode mapping relationship is built; 2, input samples are introduced from an input layer and are transferred to an output layer after the layer-by-layer processing of each hidden layer, wherein the initial weight value of a BP neural network is optimized through a genetic algorithm, and a better searching space is determined; the network is finely adjusted in a local solution space by an L-M method, and the optimal solution or the approximate optimal solution is searched out. The scheme has the advantages that the initial weight value of the BP neural network is determined by the genetic algorithm, the better searching space is used for replacing the random selection of the ordinary initial weight value, and the convergence speed is accelerated.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a method for diagnosing faults in an engine electric control unit (ECU) circuit. Background technique [0002] The engine is the heart of motor sports, which determines the performance of the car. Modern engines have become an intelligent control system integrating electronic technology, computer technology, and information technology. The degree of integration is getting higher and higher, and the structure is becoming more and more complex. The bottleneck restricting the development of the automobile industry. [0003] The automobile engine system optimizes and controls engine ignition, fuel injection, ratio of air to fuel, exhaust gas, etc. through electronic control means to make the engine work in the best state. Automobile engine system mainly includes electronically controlled fuel injection system, electronically controlled ignition system, warning system, e...

AI Technical Summary

Problems solved by technology

The engine fault diagnosis system includes exhaust gas detection, vibration, audio detection, etc., but lacks a detection system for the electronic control circuit of the engine. The reliability of the electronic system has become the key to the normal operation of the system, so the diagnosis of circuit faults has become more and more popular Pay attention to

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