D1044 Brake Pads

Car carbon brake pad structure

The braking principle of a car is to generate a force that is opposite to the direction in which the car is traveling. The main purpose is to use the brake pad and the brake disc and the friction between the tire and the ground to slow down or stop the car. The brake pads in the brake system, also called brake pads, are important components in the brake system. So what parts of the brake pads of the car are made up of?

The carbon brake pads of the automobile are mainly composed of a steel back, a bonding heat insulation layer, a friction block and an accessory, and the steel back is painted to prevent rust. The insulation consists of a material that does not transfer heat and is intended to be insulated. The friction block is composed of a friction material and an adhesive, and is squeezed on the brake disc or the brake drum to generate friction when braking, thereby achieving the purpose of decelerating the brake of the vehicle. Some inferior brake pads can experience severe thermal degradation during long braking periods and can even cause brake failure. So we have to choose a qualified brake pad product. The friction block is gradually worn due to friction. After the friction material is used, the brake pads should be replaced in time, otherwise the steel back and the brake disc will be in direct contact, eventually losing the braking force and damaging the brake disc.

Brake booster pump operation process

The brake booster pump of the automobile uses the principle of taking in air when the engine is working, which causes one side of the booster to be vacuumed, and a pressure difference is generated with respect to the normal air pressure on the other side. The pressure difference is used to strengthen the brake thrust, so that the brake pad and the brake pad The brake disc is frictionally braked.

When the engine is running, the brake pedal is depressed, and under the action of the push rod, the vacuum valve is closed, and at the same time, the air valve at the other end of the push rod is opened, and when the air enters, the air pressure in the chamber is unbalanced. Under the action of negative pressure, the diaphragm is pulled toward one end of the brake master cylinder, which in turn drives the push rod of the brake master cylinder to realize the function of the brake.

In the working state, the return spring of the push rod causes the brake pedal to be in the initial position. At this time, the check valve of the vacuum tube and the vacuum booster is in an open state, and inside the booster, the diaphragm divides it into The vacuum chamber and the application chamber are connected to each other, and are separated from the outside for most of the time. The chamber is connected to the atmosphere by two valve devices.

Carbon brake pad alarm indication

The carbon brake pad alarm of the car is a device that reminds the owner to replace it when the carbon brake pad wears to the limit. The common brake pad alarm is the small iron piece or alarm line on the carbon brake pad. There are two types of products with carbon brake pad alarm lines, one is built-in and the other is separate. The built-in type is that the alarm line and the carbon brake pad are integrated, and each replacement requires an overall replacement. The other is that the brake pads and the alarm line are separate.

The carbon brake pad alarm line is located at the lower part of the brake pad. It is originally broken. When the carbon brake pad is worn to the set limit, the exposed sensor is connected to the circuit, and the alarm indicator on the instrument panel will be on. Start. It is worth mentioning that if the carbon brake pad is replaced before the brake pad alarm, there is no need to replace the alarm line, but if the brake line alarm light is triggered to the alarm line position, a new alarm line needs to be replaced. When the brake pad is separated from the alarm line, when the brake wear triggers the warning light, it means that the brake pad alarm line is invalid. When replacing the new carbon brake pad, the brake pad alarm line must be purchased separately.