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Anonymous users2024-02-12Generally speaking, the amount of plane deflection of the brake disc exceeds millimeters, and when the vehicle applies the brakes at high speed, the brake pedal will jump slightly, and this beating will also be transmitted to the steering wheel through the relevant steering system, causing the steering wheel to shake left and right. The brake disc exceeds the limit thickness after normal wear and tear and must be replaced. In addition, if the wear of the brake disc does not exceed the minimum limit thickness, the friction surface is machined with a machine tool so that the deflection of the brake disc is less than millimeters, and then it can be reused.
When the car is braked to a certain speed, the left and right wheels of the coaxial wheel appear out of sync once or more in a circumference due to the imbalance of braking torque, and produce alternating braking one loose and one tightened phenomenon. When the braking torque imbalance phenomenon reaches a certain extent, the left and right two wheels produce alternating unequal speed rolling, which forms the left and right swing back and forth of the wheel, and this back and forth swing reaches a certain frequency, that is, the vibration is formed, so this fault is often produced when the vehicle speed and the braking torque are within a certain range.
Because the contact circumferential area of the friction pad and the brake drum is greater than 2 3 of the circumferential area of the brake drum, even if the braking torque is unbalanced, it will not produce alternating cycles in a week, so it is not easy to produce this kind of failure.
The circumferential contact area between the friction pad of the disc brake and the brake disc is usually less than 1 4 of the circumferential area of the brake disc, so in a week, there may be 4 vibration cycles, so this fault occurs in the vehicle with the steering wheel of the disc brake.
The main reasons for the unbalanced braking torque are: uneven thickness or swing of the brake disc, uneven friction coefficient of the friction plate, etc. When the thick part of the brake disc passes through the friction pad, the braking torque is large; When the thinner part of the brake disc passes through the friction plate, the braking torque is small, which forms a vibration wave.
In the same way, the swing of the brake disc and the uneven friction coefficient of the friction pad will also produce vibration waves.
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Anonymous users2024-02-11Hello owner, the brake disc plane jumps more than 5 wires, and the brake disc needs to be replaced. I hope mine is helpful to you, if you still have questions, you can continue to consult me, I wish you a happy life and good luck. --Car Master is at your service
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