　　　The brake system is the most important safety device of a car. Once the brake fails, the vehicle will be damaged, and even casualties will occur. Therefore, it is essential to maintain the brake in daily maintenance. What are the reasons for the brake failure? Let’s take a look at it together.

　　Causes of brake failure

　　1. Improper operation

　　Due to improper operation of the brakes in daily driving, the mechanical parts fail. For example, if the brakes go downhill for a long time, the brake pads will generate heat due to friction, the brake hub will carbonize and the braking function will completely fail.

　　2. Lack of maintenance

　　In daily maintenance, there is a lack of necessary maintenance for the brake system, and problems such as too many impurities in the brake master cylinder, lax sealing, failure of vacuum booster pump, dirty brake oil or air resistance after several brake oils are mixed and heated, oil leakage in the brake master cylinder or sub-cylinder, air leakage in the air storage tank or pipeline interface will all lead to brake failure.

　　2, serious overload

　　Due to the serious overload when the car is running, the inertia of the car is increased under the action of gravity acceleration, which directly leads to brake failure.

　　It reads the reason why the brakes fail, soWhat should be the treatment method of brake failure?

　　1. Turn on the emergency light.Remind the surrounding vehicles, so that you can clearly tell the surrounding vehicles that there is an abnormal situation in your car. Under normal circumstances, the surrounding vehicles will be alert to your car and try to avoid approaching you, either slowing down or bypassing.

　　2, pull the hand brake to slow down

　　When the braking force still can’t be recovered, it is necessary to slow down the speed by pulling the hand brake. When you pull the hand brake, you can’t pull it to the end or pull it too fast. Because of the speed, inertia and other reasons, once the hand brake is pulled too fast and too dead, it will cause the wire rope to jump off and the hand brake will be completely ineffective. Therefore, you should slowly pull the hand brake to the end. In addition, when pulling the handle, try not to slam the direction, otherwise the rear wheel itself has been locked, and it is easy to slip or even roll over.

　　For some mid-to-high-class vehicles with electronic parking (electronic handbrake), once the brake fails, the rate of slowing down the vehicle by pulling the handbrake button will be higher.

　　3. Forced downshift and deceleration

　　For manual transmission vehicles, if the hand brake slows down slowly or the hand brake fails, it is necessary to slow down the speed by forced downshift and engine braking. If the speed is fast, the gearbox is already difficult to open and close at this time, and most of them can’t get into the low gear. Therefore, the correct operation is to give a big throttle, open the synchronizer, forcibly push the low gear, and then bang the throttle to enter the gear. However, forced downshift and deceleration can easily make the engine speed soar to exceed the speed limit, which will cause damage to the engine itself.

　　4, friction obstacles to slow down the speed

　　You can stop the vehicle as soon as possible by directly rubbing the obstacles such as mountains, railings, trees or buildings on both sides of the road. If the obstacles such as mountains and railings are on the left side of the vehicle, that is, the driver’s side, you can’t lean against the obstacles, because if the speed is fast, a leaning against the obstacles will produce a strong collision force, which will directly act on the driver’s side, which will lead to the deformation of the cab and seriously threaten the driver’s life safety, which is no different from direct collision. So lean a little, hit it back a little, then lean against the obstacle and hit it back again. If the obstacle is on the right side of the vehicle (the co-pilot is not sitting), you can slowly stick the vehicle to the obstacle, hold the steering wheel with both hands (to avoid shaking the steering wheel and hurting your hand bones), and use the area of the whole body on the right side to contact the obstacle to increase friction and make the car stop faster.

　　5, looking for emergency escape.

　　Find a suitable road section to slow down in time, such as the emergency escape lane set up on the uphill road or expressway or continuous downhill road section. The emergency escape lane is on the right side of the main lane, and many highways will be set up on the continuous downhill road section or expressway downhill road section. If the brakes fail, you can try to enter the emergency escape lane. The lane has sand and pools to help slow down.