Automotive brake system failure promptly resolve

Troubleshooting: Check the height of the brake pedal and the pedal force to meet the technical requirements. With a vacuum gauge to measure the value of the vacuum booster pump vacuum degree standards. To determine vacuum pump and brake master cylinder pressure is normal, then the meter to measure at the wheel cylinder. The results showed: about the difference between zero and start halve the wheel cylinder pressure difference between the vacuum booster vacuum booster and does not start (100Bar - 50Bar), and release the brake, four-wheel rotation flexibility into the oil and the oil return the amount is normal. Remove the friction block measuring a thickness of about 10mm. On the surface of the car braking system as usual, but continued examination revealed that the brake pads and the disk surface is very smooth, the replacement of the friction block and brake disc brake properly.
    Failure Analysis: friction slipping because of what?
    1 friction block material deterioration. Such as: vehicle down the process, prolonged or frequent use of the brake, the friction pad with the brake disc to the sliding friction to produce high temperature, the material of the organic polymer is decomposed under high temperature. Automotive repair and maintenance of network
    2, the brake disc is generally steel, although there are certain metal hardness, but the high temperature is not oxidized, not only the decrease in hardness, and cooling too quickly will be deformed, resulting in rapid wear of the brake disc and the disc surface roughness is reduced, and a deep trench, even if the replacement of the friction disc brake will not improve, and the deformed wheel dynamic imbalance caused jitter body.
    Friction slip case use the brake, the temperature will be higher, and will inevitably lead to brake wheel cylinder temperature increased aging of rubber parts, these are adverse factors affect braking.
    Therefore, for the hydraulic brake system of the vehicle, in addition to the routine inspection, should special attention to the surface roughness of the friction material, it is very important to guarantee the braking effect.