The diagonal division of the contours significantly increases the safety of driving the car. If one of the circuits fails, the second circuit is used as a backup braking system, ensuring that the vehicle stops with sufficient efficiency.
The front wheel with the brake inoperative ensures that the vehicle remains steerable, while the rear wheel with the brake inoperative keeps the rear of the vehicle in the rut.
Failure of one brake circuit is determined by a significant increase in the brake pedal travel, and in order to brake the car it is necessary to press the brake pedal significantly harder.
The hydraulic brake drive ensures the transmission of brake fluid pressure from the master brake cylinder to the wheel brake calipers. When the brake pedal is pressed, a rod connected to the pedal presses on two pistons located one behind the other in the master brake cylinder. The master brake cylinder is the main element in the braking system.
The pistons compress the brake fluid contained in the master cylinder, and the hydraulic pressure thus created in the brake system is transmitted through pipes and hoses to the calipers of all four wheels.
In the calipers, pistons press the brake pads against the brake discs.
The design of disc brakes is such that they are self-adjusting. A piston is installed in the caliper cylinder, which is sealed in the cylinder by a rubber ring of a certain shape. It is located in the cylinder groove and tightly covers the piston. As the piston moves, it carries the ring along with it, twisting it in the groove of the cylinder. Due to the elasticity of the sealing ring, the piston then returns to its original position, as a result of which a constant gap is maintained between the brake pads and the brake disc.
The brake booster reduces the force applied to the brake pedal, thereby making the vehicle easier to control. If the vacuum booster fails, the performance of the brake system is not affected, but significantly more force must be applied to press the brake pedal.
The principle of operation of the vacuum brake booster is based on the use of vacuum in the intake manifold. Therefore, when the engine is not running, there is no increase in the brake force. If the engine suddenly stops on the road, you still have a reserve of vacuum stored in the brake booster for several short braking applications, after which you need to apply significantly more force to press the brake pedal.
On models with diesel engines, a vacuum pump is installed to create the vacuum required for the brake booster to operate.
All vehicles are equipped with a mechanically operated parking brake that acts on the brake shoes of the rear wheels.
When the brake fluid level drops, the brake master cylinder fluid level sensor turns on the indicator lamp in the instrument cluster. If the indicator light is on, first check that the parking brake is released, as the light indicates a low fluid level and the parking brake is applied.
Note: When servicing any part of the brake system, work carefully and methodically, and maintain cleanliness. Always replace components in a set where applicable if there is any doubt about their condition and use only genuine spare parts or at least of known good quality.
Source is on this resource (www.OPELBOOK.ru)
Drying brakes after washing a car
After washing your car, be sure to dry the brakes - perform several test brakes. At the same time, the water trapped between the brake pads and discs evaporates.
Also, after a long drive in rainy weather or driving in winter, dry the brakes before parking the car for a long time. To do this, it is enough to brake slightly on the last 100 m of the road before parking. This "exercise" removes the wet dirt film on the brake discs and brake drums, which increases the time it takes for the brakes to engage when braking.
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