The design of the brake system. Mercedes-Benz Sprinter (from 1995 to 2000, the year of issue)

On the front and rear wheels installed disc brakes, which with few exceptions are identical, ie, It works on the same principle. All wheels are disc brakes with floating caliper. On modes. 901 and 902 are installed Solid discs on modes. 903 and 904 - ventilated discs.

The brake system is standard equipped with an amplifier, which operates through independent vacuum pump. In addition, model Sprinter can be equipped with various additional systems, which increase safety and improve the performance of the car. For example, can be set ABS and automatic differential lock. The following are described in detail.

Fig. 266. Diagram of the braking system with pressure equalization valve: 1 - valve pressure equalization; 2 - Front brake caliper; 3 - double pressure regulator; 4 - adjustable valve pressure equalization; 5 - Rear brake caliper

Fig. 267. Diagram of the brake system without the pressure equalization valve: 1 - Front brake caliper; 2 - a pressure regulator; 3 - rear left brake caliper; 4 - rear right brake caliper

Depending on the modification of the vehicle is equipped with conventional or pressure regulator in the rear brake circuit or dual pressure regulator with adjustable and unregulated pressure equalization valve in the brake master cylinder. In Fig. 266 and 267 schematically illustrate two modifications of the brake system.

When the brakes brake discs on the front and rear wheels, the rotation slows down and reduces the speed of the car. Pressing the brake pedal coupled thereto the push rod pushes on the two next to each other the piston in the master cylinder, which is mounted in the engine compartment of the vacuum booster. The pistons transmit the force of pressure of the brake fluid in the master cylinder. There is a hydraulic pressure, which is then transmitted through pipes and hoses to the wheel brake cylinders. Under the pressure of the pistons brake pads are pressed against the discs. A more detailed examination of the mechanism of action is that because the brake caliper bracket has only one piston is created in the system pressure is transmitted to the last, which in turn presses the brake pad on one side. When this happens, the entire floating caliper bracket by pressure created by moving the guide pin and the brake disc pad is pressed against the other side. So braking is carried out in full.

The parking brake acts on the pads through a system of levers and cables. Due to the special design of the rear wheel brake discs rear there is a place for drum brakes. By clicking on the parking brake pedal is a front brake cable, which is attached to equalization. From the equalizer to the brake mechanism of each rear wheel is a separate cable. The force transmitted to the actuating lever, which decompresses the pads.