Method for establishing active automobile transmission system fault model database

Abstract

The invention discloses a method for establishing an active automobile transmission system fault model database. The method comprises the steps: collecting all fault features of a to-be-monitored automobile transmission system from historical maintenance data, screening out the fault features related to the rotating speed, carrying out the classification of the fault features, and obtaining to-be-monitored fault types; according to the classification of the to-be-monitored fault types, for each to-be-monitored fault type, selecting a prototype with the single to-be-monitored fault type, performing a test on a test bed according to a test working condition, collecting a rotating speed signal under the to-be-monitored fault type through a rotating speed sensor mounted on a power transmission system, and performing a test on the rotating speed signal; calculating instantaneous rotating speed change characteristics under the to-be-monitored fault type according to the rotating speed signal; and forming a fault model database by each to-be-monitored fault type and the corresponding instantaneous rotating speed change characteristic. According to the method, the relationship among the rotating speed signal, the fault type, the fault degree and the residual life is established, and accurate fault forecasting is facilitated.

Description

technical field [0001] The invention relates to the technical field of automobile detection, in particular to a method for establishing an active automobile transmission system failure model database. Background technique [0002] Early car fault diagnosis is mainly aimed at the problems that affect the normal use of the car (such as the engine cannot be started, or the power is insufficient, etc.), and the source of the problem is determined by dismantling and inspecting the car engine. With the development of science and technology, the fault diagnosis of automobiles has already developed to monitor the real-time running status of automobiles through a series of precision sensors, such as monitoring engine temperature through temperature sensors, tire pressure through tire pressure sensors, and engine oil pressure through pressure sensors, etc. Etc., when the oil temperature is too high, the intake pump oil pressure is insufficient and other problems occur during the drivi...

AI Technical Summary

Problems solved by technology

[0003] However, the function of this kind of monitoring system is relatively basic, it can only show whether there is a fault state at present, roughly judge the running state of the car, and cannot further identify the fault state

Moreover, the existing monitoring system usually only passively prompts the driver when the car failure problem is serious

The car transmission system is the core of the vehicle form. Once the car shows a fault status related to the transmission system, it is usually accompanied by a more serious fault, and the maintenance cost is relatively high.

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