Contents: Hydraulic service brake system ↧ Master brake cylinder ↧ Brake booster ↧ Front disc brakes ↧ Rear drum brakes ↧ Anti-lock braking system (ABS) ↧
Hydraulic service brake system
The hydraulic brake system of this car brakes all wheels. The front brakes are disc brakes with a floating caliper, in which the braking force on the wheel is developed by one working cylinder. The rear brakes are drum brakes.
The working brake system consists of the following elements:
- master brake cylinder (hereinafter referred to as GTZ) with vacuum brake booster and hydraulic system expansion tank;
- four wheel brake cylinders;
- rigid hydraulic lines to the wheels;
- flexible hoses that supply pressure to the wheel cylinders.
Master brake cylinder
The master cylinder is designed for use in diagonally split systems. One front and one diagonally opposite rear brake are served by a primary piston. The opposite front and rear brakes are served by a secondary piston. The master cylinder performs the functions of a standard dual master cylinder, and also includes a low fluid indicator and limiter valves for non-ABS brakes. The limiter valves limit the pressure to the rear brakes when the master cylinder reaches a predetermined pressure.
Brake booster
The booster is a single diaphragm vacuum type booster. In the normal state, when the brake pedal is released, there is a vacuum on both sides of the vacuum booster diaphragm.
When the brake pedal is depressed, atmospheric air pressure is applied to one side of the diaphragm, providing boost. When the brake pedal is released, air is no longer supplied to that side of the diaphragm. Air is then vented from the booster through a vacuum valve.
Front disc brakes
The front brake caliper is attached to the steering knuckle with two screws. The hydraulic pressure created when the brake pedal is pressed is converted into braking force by the hydraulic cylinder. This force is evenly distributed between the outer and inner brake pads, which are pressed against the brake disc, creating braking force.
Rear drum brakes
Both brake shoes of drum brakes are pressed against the pistons of the wheel cylinder by means of upper and lower tension springs. The front brake shoe provides the main braking force when the wheel rotates in the forward direction, the rear - when the wheel rotates backwards. The braking force is transmitted through the brake shield, on which the shoes are attached, to the rear suspension arm. The clearance between the shoes and the drum is adjusted automatically and occurs every time the brake pedal is pressed.
Anti-lock braking system (ABS)
The anti-lock braking system (ABS) is designed to provide the maximum possible braking intensity under specific road conditions (and therefore, minimal braking distance) while maintaining the stability and controllability of the vehicle.
(For details, visit the website: chevyman)