iBooster

Operating principle of the iBooster

The control principle behind the iBooster is similar to that of vacuum brake boosters: in vacuum brake boosters, a valve controls the air supply to provide a boost to the force applied from the driver‘s foot. With the iBooster, the actuation of the brake pedal is detected via an integrated differential travel sensor and this information is sent to the control unit. The control unit determines the control signals for the electric motor, while a three-stage gear unit converts the torque of the motor into the necessary boost power. The power supplied by the booster is converted into hydraulic pressure in a standard master brake cylinder.

Driver assistance systems and automated driving

The electromechanical design of the iBooster also offers a host of benefits for driver assistance systems. Using the electric motor, the iBooster can build up pressure independently, without the need for the driver to apply the brake pedal.

Compared with typical ESP® systems, the required braking pressure is built up three times more quickly and is adjusted with much greater accuracy through the electronic control system. This offers significant benefits for automatic emergency braking systems, for example.

In combination with the ESP® from Bosch, the iBooster provides the braking system redundancy required by automated vehicles for safety reasons.