Why do the new brake pads always fail to stop the car?
TIME：2020.01.17
Brake pads, also known as "brake shoes" or "brake pads, " are small, but for that distance of a few meters, brake pads can also be called basic and important parts of an active safety system. Because the brake pad is a consumable, it will wear out gradually in use, when the wear limit position must be replaced, otherwise it will reduce the braking effect, and even cause safety hazards. Why do brake pads need to break in after replacement? Brake pad is divided into disc brake and drum brake, materials generally include Resin Brake Pad, Powder Metallurgy Brake Pad, Carbon Composite Brake Pad, ceramic brake pad several kinds. Brake pad and brake disc wear after a period of time, the contact surface of the two, there will be a lot of uneven. The brake disc and the brake pad are in such close contact that the contact is a bit like the contact between the gears. At this point, the brake pad and brake disc contact area has been maintained larger, braking capacity is also relatively strong. With the new brake pads, the brake pad surface is relatively flat, and the brake disc contact surface is very uneven, then there will be similar to "a piece of soap on the washing board" phenomenon. The contact area between them is very small, and when the brake pad deformation is very large, as if with a strong pressure soap, because the edge of the washing board is very hard, so that the soap contact surface deformation. At this time, it will, eat at ordinary times appear the so-called "brake" situation. Therefore, a new brake pad needs to run-in, so that the brake pad and brake disc contact area between the increase, better play a braking effect. How do the new brake pads break in? Usually, the new brake pad to run-in 200 km to achieve good braking effect, just replaced the new brake pad of the vehicle must be careful driving. Under normal driving conditions, for every 5000 kilometers traveled, the brake pad should be inspected once. The contents include not only the thickness, but also the condition of the brake pad wear, such as whether the degree of wear on both sides is the same, whether the return position is comfortable, and so on, if you find something unusual, you must deal with it immediately. About the new brake pad how to run-in, the following is the specific method: 1, after the completion of the installation, find good car less places to run-in. 2. Accelerate to 100 kph. 3. Apply the brakes lightly and brake with moderate force to reduce the vehicle's speed to about 10-20 kph. Release the brakes and drive for a few kilometers to cool the pads a bit. 5. Repeat step 2 above -- 10 or more times. Note: 1, in each 100 to 10-20 km / H Brake, not strict requirements each time need very accurate speed, accelerate to about 100 km / h can start this braking cycle. 2. When you brake at 10-20 km / h, there's no need to keep your eyes on the road, just keep your eyes on the road, and make sure you're safe, braking at about 10-20 km / h for every braking cycle. 3. Do Not Stop the vehicle during these ten cycles unless you want the material to be incorporated into the disc causing the brake to vibrate. 4. Break in the new brake pads as much as possible using a split brake, don't use the emergency brake until it has been properly applied. 5, break-in after the brake pad still need and brake disc after a few hundred kilometers of walk-in period will achieve good performance, at this time must be careful to drive, to prevent accidents.
