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Commercial vehicle wheel speed signal verification method

A signal verification and wheel speed technology, applied in the direction of brakes, etc., can solve problems that affect the braking effect of the whole vehicle, major after-sales problems, vehicle speed and mileage distortion, etc.

Active Publication Date: 2020-10-13
NANJING AUTOMOBILE GROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the model of a certain wheel ring gear is wrong, it will lead to the inconsistency of the pulse frequency of the collected four wheel speeds
On the one hand, the vehicle speed and mileage displayed on the instrument are distorted; on the other hand, when braking, the ABS misjudges the wheel with a small number of teeth on the ring gear as having a tendency to lock, and then continuously performs anti-lock brake intervention on the wheel, which affects the entire vehicle. Braking effect, which interferes with the driver's driving behavior
[0003] Wrong ring gear and tire model does not affect the off-line inspection of the whole vehicle. Once the problematic vehicle enters the market, it may cause major after-sales problems

Method used

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  • Commercial vehicle wheel speed signal verification method
  • Commercial vehicle wheel speed signal verification method
  • Commercial vehicle wheel speed signal verification method

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Embodiment Construction

[0030] Specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0031] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0032] A wheel speed signal verification method realizes real-time detection and fault diagnosis of wheel signals. The working steps include: after the vehicle speed exceeds 15km / h, the ABS controller calculates the collected wheel speed signal every 1 second as follows to obtain the front axle wheel speed proportional coefficient kf , Rear axle wheel speed proportional coefficient k r , calculate 10 times in a row:

[0033]

[0034]

[0035] In the formula, v 1 is th...

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Abstract

The invention discloses a wheel signal verification method, which achieves the real-time online detection and fault diagnosis of a wheel signal through setting a wheel speed abnormal threshold and a monitoring period and analyzing a wheel speed signal proportion coefficient, and then judges whether a gear ring model is correct or not.

Description

Technical field: [0001] The invention belongs to the technical field of automobile running speed verification, in particular to a method for verifying commercial wheel speed signals. Background technique: [0002] The speed of commercial vehicles is mainly obtained through the pulse voltage signal generated by the cooperation of the wheel speed sensor and the ring gear, and then converted by the ABS control module. Commercial vehicle ring gears usually have three specifications of 60, 80, and 100 teeth. Due to the special market demand of commercial vehicles, there are many cases of the same installation size but different ring gear teeth numbers. Once a certain wheel ring gear model is wrong, it will result in inconsistency in the collected four wheel speed pulse frequencies. On the one hand, the vehicle speed and mileage displayed on the instrument are distorted; on the other hand, when braking, ABS misjudges the wheel with a small ring gear tooth number as having a tende...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/172
CPCB60T8/172
Inventor 张承龙许国林乔璐璐张春龙章俊
Owner NANJING AUTOMOBILE GROUP CORP
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