Brake Assist System Description and Operation

Brake Assist System Description and Operation

System Component Description

The brake assist system consists of the following:

Brake Pedal

Receives, multiplies and transfers brake system input force from driver.

Brake Pedal Pushrod

Transfers multiplied input force received from brake pedal to brake booster.

Hydraulic Brake Booster

Uses accumulator fluid pressure created by the pump and motor to decrease effort required by driver when applying brake system input force.

When brake system input force is applied, pressurized brake fluid is admitted to the rear chamber of an apply piston, providing a decrease in brake pedal effort required. When input force is removed, pressurized brake fluid is blocked off from the piston.

System Operation

Brake system input force is multiplied by the brake pedal and transferred by the pedal pushrod to the hydraulic brake master cylinder. Effort required to apply the brake system is reduced by the hydraulic brake booster.