What are the rear brake pads of a car
automotive rear brake pads refers to the friction material fixed on the brake drum or brake disc rotating with the wheel, its main function is to generate braking force through friction, so as to slow down or stop the vehicle. Brake pads consist of steel plate, adhesive insulation layer and friction block, of which the friction block is the core part, which produces friction in direct contact with the brake disc .
Brake pad type and material
There are many types of brake pads, common are:
metal brake pads : such as semi-metal brake pads, high friction coefficient but easy to produce noise.
metal-free brake pads : better performance but higher price.
ceramic brake pads : durable and good heat dissipation, short braking distance, but expensive .
Replacement interval and maintenance suggestions
The brake pad replacement cycle depends on a number of factors, including driving habits, mileage and the quality of the brake pads. In general, the life of the front wheel brake pads is about 42,000 kilometers, and the rear wheel is about 78,000 kilometers. When the thickness of the brake pad is less than 3 mm, it should be considered for replacement. In addition, driving habits have a significant impact on the life of the brake pads, sudden braking will shorten the life of the brake pads, and good driving habits can extend its service life .
The method of determining whether the brake pads need to be replaced
naked eye observation method : Observe the brake pad thickness through the wheel hub gap, less than 3 mm should consider replacing.
The main functions of the rear brake pads include significantly increasing the braking force, slowing down, stopping, or remaining stationary the wheels in motion. The working principle is to produce the necessary braking effect by making the brake shoe tightly fit the brake disc. In addition, the brake pads also protect the piston from impurity particles .
The specific functions of the brake pad include:
friction braking : When the brake pedal is depressed, the brake pads rub against the brake disc (or brake drum), reducing the speed or stopping the vehicle.
thermal energy conversion : the brake pad converts the kinetic energy of the vehicle into thermal energy in the process of friction and sends it out to ensure the continuous and effective work of the brake system.
stability control : high quality brake pads can ensure the stability of the braking process, improve braking efficiency, reduce braking distance, enhance driving safety .
The characteristics of different types of brake pads include:
asbestos brake pads : good high temperature resistance, moderate price, enhance the strength of the brake pads, improve braking performance.
semi-metal brake pads : made of metal materials, good temperature control and heat dissipation effect, to ensure a more stable braking effect.
Low metal brake pads : contain finer fibers and particles, reduce brake drum wear and noise, improve driving comfort.
ceramic brake pads : low density, high temperature resistance, wear resistance, environmental protection, long service life, no falling ash, no noise, often used in high-grade models .
rear brake pad failure may be manifested in a variety of symptoms, including soft brakes, abnormal brake noise, brake jitter and so on. These symptoms are usually caused by brake pad wear, brake fluid problems, sensor failure and other reasons.
Brake pad wear common faults and reasons
soft brakes : this is due to insufficient brake oil, thinner brake discs and pads, and air in the brake lines. Deteriorating brake oil or high water content can also cause slow brake response .
abnormal brake sound : sharp metal friction sound emitted when braking, may be due to thin brake pads, poor quality, foreign matter or brake disc rust .
brake jitter : high-frequency pedal or body jitter, usually caused by deformation or uneven wear of the brake disc .
brake offset : the steering wheel deflects when braking, and the body deviates from the straight track, caused by the uneven braking force .
Determine whether the brake pads need to be replaced
thickness check : the new car brake pad thickness is usually about 1.5cm, if the thickness is less than 5mm, you need to replace .
braking effect : the braking effect is not good or the pedal position is too low during emergency braking, indicating that the brake pads are seriously worn .
abnormal sound judgment : continuous abnormal sound during braking may be excessive wear of the brake pads .
warning light : The yellow fault light on the dashboard indicates that there is something wrong with the brake system. Check as soon as possible.
Care and maintenance advice
Check regularly: Change the brake oil every 2 years or 40,000 kilometers, choose DOT4 or above label .
professional maintenance : brake problems should be promptly to the professional maintenance station for inspection and maintenance, to avoid penny wise and pound foolish .
daily inspection : regularly check the thickness and wear of the brake pads to ensure driving safety .
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