Fault diagnosis method for clutch slipping during starting of AT

Abstract

The invention belongs to the field of AT diagnosis, and relates to a fault diagnosis method for clutch slipping during starting of an AT. According to the method, when a vehicle runs, the starting process and the starting gear running process of the vehicle are discriminated through a handle signal and a gear signal; and then the fault of clutch slipping during starting is judged through a corresponding diagnosis algorithm based on the opening degree of an accelerator, a rotating speed and other information, and a corresponding fault code is generated. According to the method, the capability of diagnosing the faults of the AT is improved, the fault diagnosis function of the starting clutch of the AT is achieved, and the method plays a positive role in accelerating the commercialization process of the AT.

Description

technical field [0001] The invention belongs to the field of diagnosis of AT transmissions, and relates to a method for diagnosing slipping faults of starting clutches of AT transmissions. Background technique [0002] With the promotion and application of AT transmissions in the field of commercial vehicles, the research and development of AT transmissions is also in full swing. Various research institutes and transmission manufacturers have successively developed a variety of prototypes and carried out a large number of real vehicle assessment tests. The commercial use of AT transmissions The prospect of globalization is becoming more and more clear, and it will become an important direction for the advancement of transmission automation technology in the field of commercial vehicles in my country, and it will play a decisive role in the development of commercial vehicles. [0003] my country's AT transmission research started relatively late, especially for high-power AT t...

AI Technical Summary

Problems solved by technology

[0003] my country's AT transmission research started relatively late, especially for high-power AT transmissions used in commercial vehicles. The commercial R&D time is only a short period of more than ten years. Due to the technological monopoly and technology blockade of foreign mainstream transmission companies, AT transmission control system engineering Research is difficult. As an important part of the control system, the fault diagnosis system is responsible for the important mission of vehicle reliability, usability and maintainability. Without a complete fault diagnosis system, the industrialization of AT transmissions will be greatly limited.

At present, the fault diagnosis of AT is mostly concentrated on the electrical system. There is a set of relatively mature diagnostic algorithms for sensors, solenoid valves and control modules, but the diagnosis of mechanical parts is basically blank. A clutch slipping fault diagnosis method is designed and developed to improve AT The fault diagnosis capability of the system will be of great help and accelerate the industrialization process of AT transmissions

[0004] Relevant patents and documents at home and abroad were searched, and no patents or published documents related to the patent content of this application were found

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