Brake pads, also called disc brake pads, are the most critical safety parts in a car’s braking system. Brake pads play a decisive role in all braking effects.
Brake pads are generally composed of steel plates, bonded insulation layers and friction blocks. The insulation layer is composed of non-heat-conducting materials for the purpose of heat insulation; the friction blocks are composed of friction materials and adhesives, which are used during braking.
The extrusion creates friction on the brake disc and brake drum, thereby achieving the purpose of decelerating and braking the vehicle.
How brake pads works?
How brakes work? It mainly comes from friction. The friction between the brake pads and the brake discs (drums) and the tires and the ground is used to convert the kinetic energy of the vehicle into heat energy after friction to stop the vehicle.
A good and efficient braking system must be able to provide stable, sufficient, controllable braking force, and have good hydraulic transmission and heat dissipation capabilities to ensure that the force exerted by the driver from the brake pedal can be fully and effectively transmitted to the master cylinder and each sub-cylinder, and avoid hydraulic failure and brake failure caused by high heat.
The brake systems on cars are divided into two categories: disc brakes and drum brakes. However, in addition to the cost advantage, drum brakes are far less efficient than disc brakes.
The structure of brake pad
Brake pads, in which the thermal insulation layer is composed of materials that do not conduct heat, are intended to insulate. The friction block is composed of friction material and adhesive.
When braking, it is squeezed on the brake disc or brake drum to generate friction, thereby achieving the purpose of decelerating and braking the vehicle. Due to friction, the friction pad will gradually be worn.
Generally speaking, the lower the cost of the brake pad, the faster it will wear. The brake pads must be replaced in time after the friction material is used up, otherwise the steel plate and the brake disc will be in direct contact, eventually losing the braking effect and damaging the brake disc.
Best type of brake pads
what are the best brake pads? That’s a good question.Best brake pads surely made of best brake pad material.
Semi-metallic hybrid brake pads (Semi-met) mainly use rough steel wool as reinforcing fiber and an important mixture. Asbestos type and non-asbestos organic type brake pads (NAO) can be easily distinguished from appearance (fine fibers and particles), and they also have certain magnetism.
Steel wool has high strength and thermal conductivity, which makes semi-metallic hybrid brake pads have different braking characteristics from traditional asbestos brake pads. For example, a semi-metallic brake pad has a high internal metal content and high strength.
The high metal content also changes the friction characteristics of the brake pad. This usually means that a semi-metallic brake pad requires higher braking pressure to complete the same braking process. motion effect. High metal content, especially in low-temperature environments, also means that the brake pads will cause larger disc or drum surface wear and produce greater noise.
The main advantages of semi-metallic brake pads are its temperature control capability and higher braking temperature.
Compared with asbestos type brake pads, which have poor heat transfer performance and poor cooling capabilities of brake discs and brake drums, they help brake braking during braking. The rotor and brake drum dissipate heat from their surfaces, and the heat is transferred to the brake caliper and its components.
Ceramic brake pads are a new type of friction material, originally developed by Japanese brake pad companies in the 1990s.
Ceramic brake pads are composed of ceramic fibers, iron-free filler materials, adhesives and a small amount of metal. They have the advantages of high temperature resistance, no noise, no dust, no corrosion of the wheel hub, long service life, and environmental protection.
Ceramic brake pads are now widely used in the Japanese and North American automobile markets, and new European models have also begun to be equipped with ceramic brake pads.
The international market’s recognition of ceramic friction materials has accelerated my country’s research and development of ceramic brake pads.
At present, brake pad companies have independent research and development and production capabilities for mid-to-high-end ceramic brake pads, and have supplied them to some large foreign automobile manufacturers, gradually entering foreign mid-to-high-end markets.
The reason is that first of all, the price of ceramic friction materials is high, which is difficult for OEMs to accept. Secondly, foreign countries have higher requirements on noise and environmental protection. Ceramic friction materials have the advantages of being noise-free, durable and environmentally friendly.
The importance of brake pads
During the use of the brake pads, the friction blocks will gradually be worn due to friction.
The brake pads must be replaced in time after the friction material is used up. Otherwise, the steel plate and the brake disc will be in direct contact, and the braking effect will eventually be lost and damaged.
Brake discs affect driving safety. For your driving safety, please check and replace brake pads regularly.
How to choose brake pads?
First, look at the friction coefficient. The friction coefficient determines the basic braking torque of the brake pad. If it is too high, it will cause wheel locking, loss of direction and burning of the pad during braking. If it is too low, the braking distance will be too long;
Second, it depends on safety. The brake pads will generate instantaneous high temperatures when braking, especially when driving at high speed or emergency braking. Under high temperature conditions, the friction coefficient of the friction pads will decrease;
Third, check whether it is comfortable, including braking feeling, noise, dust, smoke, odor, etc., which is a direct reflection of friction performance;
Fourth, look at the service life. Generally, brake pads can guarantee a service life of 30,000 kilometers.
In a word
Under normal driving conditions, check the brake shoe once every 5,000 kilometers. Not only should you check the remaining thickness, but also the wear status of the brake pad, whether the degree of wear on both sides is the same, whether it can return to the position freely, etc., it was found that Abnormal situations must be dealt with immediately
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