Function of the brake master cylinder in vehicles with automatic transmission
The brake master cylinder is a key component of the brake system, converting force from the brake pedal into hydraulic pressure that is transmitted to the brake calipers and forces the brake pads against the rotors.
In vehicles with an automatic transmission, the brake master cylinder performs additional functions:
Brake pedal boost:
* The automatic transmission is installed between the engine and the drive wheels.
* This transmission creates a thrust that acts against the brake pedal, making braking more difficult.
* The brake master cylinder is equipped with a vacuum booster, which uses engine vacuum to increase brake pedal force. This makes braking easier for the driver, especially when stopping suddenly.
Adaptive Brake Control:
*Modern vehicles with automatic transmissions are often equipped with an adaptive brake control system that uses wheel speed sensors and steering angle sensors.
* This system can detect wheel slip and adjust hydraulic pressure accordingly to ensure optimal stability and prevent wheel locking.
Preventing kickbacks:
*On inclined surfaces, vehicles with automatic transmission may roll backward when the brake is released.
*To prevent this, some automatic transmission vehicles are equipped with an anti-rollback feature that automatically applies pressure to the brakes when the vehicle is on a hill. This is achieved through the pressure created by the master cylinder.
Brake backup:
* In the event of a failure of the brake system’s main hydraulic circuit, the brake master cylinder can provide backup hydraulic pressure for a specified number of braking applications. This is achieved by dividing the brake master cylinder into two separate sections, each of which controls a separate brake circuit.