Brake Pedal Assy: Description and Operation

Brake pedal sensor

NOTE: To guarantee optimum recuperation, the installation position of the pedal sensor must be strictly observed.

The brake pedal sensor mounted on the pedals detects the degree of deceleration desired by the driver, which is duly input as a parameter in the operating strategy in order to generate braking torque in the electric machine. Recuperation is thus possible in the free travel area (pedal travel without conventional braking force) of the brake pedal before hydraulic brake pressure can actually be generated. The free travel was increased by 4 mm for more precise control.

Function

The brake pedal has a permanent magnet, which passes the pedal sensor when the brake is actuated. The sensor contains two Hall sensors within a measuring range, which cause a corresponding output voltage to be produced when the magnet is passed (Hall effect). Recuperation is controlled using this signal.