Maintenance of Automotive Brake Pump

The development of modern car brake pumps originated from primitive mechanical braking devices. The most primitive brake control was just the driver manipulating a set of simple mechanical devices to apply force to the brakes. At that time, cars were relatively small in weight and low in speed, and mechanical braking could already meet the needs of car braking. The development of modern car brakes originated from primitive mechanical braking devices. The most primitive braking control was just the driver manipulating a set of simple mechanical devices to apply force to the brakes. At that time, cars were relatively small in weight and low in speed, and mechanical braking could already meet the needs of car braking.

The traditional automobile brake master cylinder includes four parts: the application system, brake light system, hydraulic or pneumatic system, and wheel brake. The main components include: pedals, vacuum boosters, brake master cylinders, brake combination valves, brake pipelines, brake wheel cylinders, and brakes. The brake is the core component. A retarder is an auxiliary braking device for large vehicles, which enables smooth deceleration without consuming the braking system.

Analysis of the compensation effect of the brake master cylinder

Why can the air release bolt on the cylinder be unscrewed to remove the air from the brake system after multiple brake presses; Why does the first foot brake become soft and low, while the second foot becomes hard and high when the gap between the brake pads and the brake drum is too large? Experienced maintenance workers can basically determine the fault of the braking system by stepping on the brake, all of which are based on the compensating effect of the brake master cylinder.

When the brake pedal is released, the master cylinder piston returns under the force of the return spring, causing the oil pressure in the working chamber to decrease, and the cylinder and pipeline return oil. But if you quickly release the brake pedal, the brake fluid at the rear of the piston will be pushed through the compensating hole on the piston to flip the cup and enter the working chamber in front of the piston. And when the brake is pressed again afterwards, the brake fluid in the working chamber is discharged back to the oil circuit and the cylinder. The rapid and repeated loosening and stepping of the brake, due to the compensation of the brake fluid at the rear of the piston entering the working chamber, results in more oil output and less oil return from the working chamber each time. This effect is called the compensation effect of the brake master cylinder.