Regenerative Braking Cooperation Control (RBC)
The brake force apportion is distributed by controlling hydraulic braking and the total brake force (hydraulic + regenerative brake) output that the driver requires is generated. In the case of regenerative brake failure, the total brake force that the driver requires is supplied by the hydraulic brake system.
The AHB system is composed of the Pressure Source Unit (PSU), the Integrated Brake Actuation Unit (IBAU). First, the PSU generates the hydraulic pressure required for braking. Similar to the boosting effect when the driver steps on the brake pedal in a system equipped with a vacuum booster, the hydraulic pressure stored in the cylinder is supplied to provide pressure throughout the entire brake line. Second, the IBAU delivers pressure that is generated by the PSU to a caliper on each wheel. It is connected to the brake pedal to detect the brake force that is required by the driver, and to generate a brake feeling. The IBAU carries out the ABS, TCS, and ESC functions as in conventional vehicles.