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Measurement method of disc brake dragging torque and heating characteristic evaluation method

A disc brake and drag torque technology, applied in the direction of brakes, brake components, brake safety systems, etc., can solve the problems of high implementation cost and complicated operation, and achieve the effect of low implementation cost and simple operation

Active Publication Date: 2015-08-19
BEIQI FOTON MOTOR CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In the prior art, only in the automotive industry standard QC / T 592, there is a drag torque measurement method under a bench in a cold state. This measurement method is complicated to operate, requires a special test device, and has a high implementation cost

Method used

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Embodiment Construction

[0011] Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0012] According to one aspect of the present invention, there is provided a method for measuring the drag torque of a disc brake in the state of a complete vehicle, the method comprising the steps of: a, suspending the wheel corresponding to the brake to be tested; b, depressing the brake pedal, Pressurize the brake caliper assembly of the brake, and then release the brake pedal; c. Connect the tension gauge to the wheel, determine the distance R between the tension gauge connection point and the center of the wheel, and use the tension gauge Pull the wheel to rotate at a constant speed to ensure that the pulling force is always perpendicular to the line connecting the connection point of the tension gauge...

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Abstract

The invention discloses a measurement method of a disc brake dragging torque. The method comprises the steps of: (a) suspending wheels; (b) pressurizing a brake caliper assembly; (c) pulling the wheels to rotate, and recording the tension; (d) disassembling the brake caliper assembly, rotating the wheels, and recording the tension; and (e) calculating the dragging torque. Through the mode, the invention can provide a dragging torque measurement method in a whole vehicle state. The invention further discloses a heating characteristic evaluation method of a disc brake; The method comprises the steps of: (a) repeatedly accelerating and braking, parking when the temperature of the brake rises to a preset temperature, and suspending the wheels; (b) rotating the wheels when the temperature is lowered to a first measurement temperature, and recording the tension; (c) rotating the wheels when the temperature is lowered to a second measurement temperature, and recording the tension; (d) rotating the wheels when the temperature is lowered to a third measurement temperature, and recording the tension; and (e) drawing a curve of the tension changed along with the temperature. Through the mode, the invention can provide a method for evaluating a brake heating characteristic in a whole vehicle state.

Description

technical field [0001] The invention relates to the field of automobile testing, in particular to a method for measuring the drag torque of a disc brake, and also provides an evaluation method for the temperature rise characteristic of the disc brake. Background technique [0002] The drag torque is when the car is not braking, due to environmental factors or the manufacturing process does not meet the requirements, the piston of the brake cylinder cannot be fully returned. There is contact, and the resulting torque. It will increase the fuel consumption of the car and cause brake lock due to frictional heat. It is an important index of car braking performance and directly affects the safety and economy of car driving. The temperature rise characteristic of the disc brake refers to the characteristic that the drag torque changes with temperature. Generally, as the temperature of the brake increases, the drag torque will gradually increase. [0003] In the prior art, only ...

Claims

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Application Information

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IPC IPC(8): B60T17/22
CPCB60T17/221
Inventor 宋建勋阚文娟卢彦温张政
Owner BEIQI FOTON MOTOR CO LTD
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