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Brake judder diagnosis device and brake judder diagnosis method

A diagnostic device and foot brake valve technology, which is applied in the field of construction machinery, can solve problems such as the inability to reasonably diagnose the vibration source of automobile crane braking, excitation, braking, vibration, etc., and achieve the effect of reducing hazards

Inactive Publication Date: 2015-08-19
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a brake jitter diagnosis device and a brake jitter diagnosis method using the device, which solves the technical problem that the prior art cannot reasonably diagnose the brake excitation of the truck crane and the brake jitter vibration source

Method used

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  • Brake judder diagnosis device and brake judder diagnosis method
  • Brake judder diagnosis device and brake judder diagnosis method
  • Brake judder diagnosis device and brake judder diagnosis method

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Embodiment approach

[0122] As a preferred or optional implementation manner, the method for diagnosing brake judder further includes the following steps:

[0123] Step A. If the brake drum and friction plate of the three-axle vehicle are not worn, then when the three-axle vehicle is running at a predetermined speed (the speed is preferably 70km / h), open the foot brake valve to keep the foot brake valve The brake pressure is at the third predetermined pressure value (preferably 2bar~2.5bar), and the brake vibration diagnosis device is used to detect the wheel speed of the left wheel and the right wheel of the three-axle vehicle in real time and the braking force of the foot brake valve. dynamic pressure or brake pressure of the foot relay valve. The purpose of this step is to diagnose the wheel speed fluctuations in the whole braking process of the vehicle with no brake drum and friction lining worn out. Since the whole brake system has no wear and thermal deformation, the wheel speed during braki...

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Abstract

The invention discloses a brake judder diagnosis device and a brake judder diagnosis method, which relates to the field of the engineering machinery. The brake judder diagnosis device comprises a pressure fluctuation diagnosis device, a wheel speed fluctuation diagnosis device and a detection result display device, wherein the pressure fluctuation diagnosis device comprises a pressure detection element and a pressure signal collection device; the pressure detection element can detect a pressure value in a left air chamber inside a judder axle brake loop in a three-axle vehicle, a pressure value in a right air chamber, a pressure value of a foot relay valve and brake pressure of a foot brake valve; the wheel speed fluctuation diagnosis device comprises a wheel speed detection element and a wheel speed signal collection device; and the wheel speed detection element can detect the rotation speed of a left tire and a right tire, braked by the judder axle brake lop. The brake judder diagnosis method is characterized in that the brake judder diagnosis device is installed and used on a three-axle crane. The device and the method are used for diagnosing the brake judder of the three-axle vehicle.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a brake shake diagnosis device and a brake shake diagnosis method using the device. Background technique [0002] Brake judder refers to the phenomenon that the steering wheel, brake pedal, body floor and seat vibrate violently when the vehicle brakes within a certain speed range. It is one of the vibrations caused by braking. According to the occurrence mechanism of brake jitter, brake jitter can be divided into three categories, namely low frequency jitter, medium frequency chatter and high frequency howling. [0003] Brake shake generally occurs when the vehicle is running at high speed and applying moderate-intensity braking. It is an important failure of the vehicle braking system, which has a significant impact on the handling stability of the vehicle, and increases the driver's fatigue and the possibility of misoperation. Therefore, the research on the causes of brake...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007
Inventor 苏锦涛单增海
Owner XUZHOU HEAVY MASCH CO LTD
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