Vehicle neutral switch fault detection method, system and vehicle

Abstract

The invention provides a neutral gear fault detection method and system for a vehicle and the vehicle. The method comprises the steps that a neutral gear switch signal and a gear signal are acquired; the neutral gear switch state is judged according to the neutral gear switch signal, and the current gear is judged according to the gear signal; if the neutral gear switch state is in the open state and the current gear is the neutral gear, the state of a clutch, the vehicle speed and the rotation speed of an engine are further detected; if the state of the clutch is in the non-treaded state, the vehicle speed is smaller than the preset vehicle speed, and the rotation speed of the engine is larger than the preset rotation speed, whether the neutral gear signal is the same as the neutral gear switch signal acquired within the last sampling period is further judged; and if the neutral gear signal is the same as the neutral switch signal acquired within the last sampling period, it is judged that the neutral gear switch fault exists. By the adoption of the method, whether the neutral gear switch fault exists or not can be precisely detected, and the fault detection precision is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle neutral switch fault detection method, system and vehicle. Background technique [0002] With the continuous improvement of automobile intelligence, the types and quantities of electronic and electrical equipment on the car are increasing. When the user is driving or riding in the car, these electronic and electrical equipment provide users with rich needs. However, due to the electronic , The types and quantities of electrical equipment are increasing, and the probability of failure is also increasing. [0003] In the related art, when a fault occurs in electronic or electrical equipment of the single-channel signal type, the fault cannot be detected accurately, and misjudgment is prone to occur. For example: for the fault of the neutral switch stuck in the gear position of the single signal type, the vehicle speed, engine speed, and clutch state conditions are us...

AI Technical Summary

Problems solved by technology

[0003] In related technologies, when a fault occurs in electronic and electrical equipment of the single-channel signal type, the fault cannot be detected accurately, and misjudgment is prone to occur.

For example: for the fault of the neutral switch stuck in the gear position of the single signal type, the vehicle speed, engine speed, and clutch state conditions are usually judged to determine whether the neutral switch is stuck in the gear position. However, there are usually large The chance of false positives, can not achieve accurate fault diagnosis

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