Wear amount estimation device, wear amount estimation method, and wear amount estimation program

A technology for estimating device and wear amount, which is applied in transportation and packaging, brake pressure measurement, brakes, etc., and can solve the problem of reduced accuracy of wear amount estimation

Pending Publication Date: 2022-02-18
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The estimation accuracy of the amount of wear decreases when the change in the wear characteristics of the brake pad due to heat is not considered

Method used

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  • Wear amount estimation device, wear amount estimation method, and wear amount estimation program
  • Wear amount estimation device, wear amount estimation method, and wear amount estimation program
  • Wear amount estimation device, wear amount estimation method, and wear amount estimation program

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Embodiment Construction

[0044] Embodiments of the present invention will be described with reference to the drawings.

[0045] 1. Summary

[0046] 1-1. Vehicle and braking device

[0047] figure 1 It is a schematic diagram showing the configuration of the vehicle 1 according to the present embodiment. The vehicle 1 may be an automatic driving vehicle controlled by an automatic driving system. The vehicle 1 includes wheels (tyres) 5 and a brake device 10 . The braking device 10 generates a braking force in response to a braking operation by a driver or an automatic driving system.

[0048] figure 2 It is a block diagram schematically showing the configuration of the brake device 10 according to the present embodiment. The brake device 10 includes a brake rotor 20 , a brake shoe 30 and an actuator 40 .

[0049] The brake rotor 20 is a rotating member that rotates together with the wheel 5 . For example, the material of the brake rotor 20 is cast iron. The brake pad 30 is a friction member in ...

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Abstract

The invention relates to a wear amount estimation device, a wear amount estimation method, and a wear amount estimation program for improving the estimation accuracy of the wear amount of a brake pad of a vehicle. The amount of wear function represents the amount of wear as a function of vehicle speed, brake pressure, and brake duration. When the vehicle is braked, the wear amount estimation device executes a wear amount calculation process for calculating a wear amount corresponding to the vehicle speed, the brake pressure, and the brake duration by using the wear amount function. In addition, the wear amount estimation device estimates the temperature of the contact portion of the brake pad in contact with the brake rotor on the basis of the vehicle speed, the brake pressure, and the brake duration. On the basis of the temperature of the contact part, the wear amount estimation device updates temperature history information indicating at least the temperature history of the contact part. In the wear amount calculation process, the wear amount function is variably set on the basis of the temperature history of the contact portion indicated by the temperature history information obtained at the time of the last braking.

Description

technical field [0001] The present invention relates to a technique for estimating the amount of wear of a brake pad of a vehicle. Background technique [0002] Patent Document 1 discloses a wear amount calculation device that calculates the wear amount of a brake member such as a railway vehicle. The wear amount computing device calculates (estimates) the wear amount of the brake member based on the brake pressure, the speed of the braking target, and the braking time. [0003] Patent Document 1: Japanese Patent No. 6207075 [0004] When braking a vehicle, a braking force is generated by pressing a brake pad against a brake rotor that rotates together with a wheel. At this time, the brake pads are worn due to the friction between the brake pads and the brake rotor. The amount of wear of the brake pads per unit input (1 braking) basically depends on the vehicle speed, brake pressure and braking duration. [0005] The inventors of the present application focused their att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D66/02B60T17/22
CPCF16D66/026B60T17/22F16D2066/001F16D66/021F16D2066/005B60T2250/04F16D66/00F16D65/092F16D2066/006B60T2270/88B60T17/221
Inventor 松井范嘉
Owner TOYOTA JIDOSHA KK
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