(1) The truck brake boosteris an indispensable part of the brake system, its main role is to push the brake pad, the brake pad friction brake drum, so that the speed is reduced and stationary.
(2) After stepping on the brake, the main pump produces a thrust to press the hydraulic oil to the sub-pump, and the piston inside the sub-pump begins to move under the liquid pressure to push the brake pad. The oil brake is composed of a brake master pump and a brake oil storage tank. They’re connected to the brake pedal at one end and the brake tubing at the other. Brake oil is stored in the brake master pump, and an oil outlet and an oil inlet are provided. When the brake is pressed, the oil outlet opens and the oil inlet closes. Under the pressure of the piston of the pump body, the brake oil pipe is extruded from the oil pipe to each brake pump to act as the brake function. When the brake plate is released. The oil outlet in the brake master pump will be closed, and the oil inlet will be opened, so that the brake oil from each brake branch pump back to the brake master pump, back to the original state.
(3) Classification of truck brake pump
Automobile brake is divided into air brake and hydraulic brake.
● Air brake
The air brake is composed of an air compressor (commonly known as an air pump), at least two air storage cylinders, a brake master pump, a quick release valve of the front wheel, and a relay valve of the rear wheel. The brake consists of four pump, four adjusting back, four CAM, eight brake shoes and four brake ancient.
The oil brake is composed of a brake master pump (hydraulic brake pump) and a brake oil storage tank.
Heavy trucks use air brakes, and general cars are oil brakes, so the total brake pump and brake pump are hydraulic brake pumps. Brake pump (hydraulic brake pump) is an indispensable part of the brake system
When you step on the brake plate, the brake master pump sends the brake oil through the pipeline to the brake pump. The brake subpump has a connecting rod that controls the brake shoe or brake skin. When braking, the brake oil in the brake tubing pushes the connecting rod on the brake pump, so that the brake shoe tights the flange disc on the wheel to stop the wheel. The technical requirements of a car’s brake pump are very high, because he directly affects people’s lives.
4. Principle of truck brake chamber
Driven by the air pump through the engine, the air is compressed to high pressure gas stored in the reservoir. One of the reservoirs can be connected to the brake master pump through the pipeline. The main brake pump is divided into two chambers, the upper chamber controls the rear wheel, and the lower chamber controls the front wheel. When the driver presses the brake pedal, the upper air is first opened, and the high pressure gas from the reservoir is transmitted to the relay valve. Push out the control piston of the relay valve, and the gas from the other reservoir can be connected to the relay valve and the two rear brake subpumps. The push rod of the brake branch pump is pushed forward, and the CAM is rotated at an Angle by adjusting the back. The CAM is eccentric, and the brake shoe is stretched apart while rotating.
The upper chamber of the brake master pump is opened at the same time as the lower chamber is opened, and the high pressure gas enters the quick release valve, and then is distributed to the brake sub-pump of the two front wheels.
When the driver releases the brake pedal, the upper and lower air chambers close. The piston of the quick entry valve of the front wheel and the relay valve of the rear wheel return under the action of the spring. The front and rear brake pump and the air chamber are connected with the atmosphere, and the push rod returns to the position and the brake ends.
Generally, the rear wheel brakes first, and the front wheel brakes later, which is beneficial to the driver’s control of the direction.
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