Functional description

Accelerator pedal position is monitored separately by 2 individual sensors. Two sensors are employed to provide redundancy, implement the monitoring function and facilitate recognition of malfunctions.

The sensors register accelerator-pedal travel as angular deflection, with data being transmitted directly to the engine-management control unit as analogue linear voltage curves for pedal angle (°). Overall pedal travel is mechanically expressed as 16° ±0.5°.

Each change in accelerator-pedal position is transmitted to the engine-management control unit with a maximum lag of 50 milliseconds. Sensor signals are transmitted in analogue form. The engine-management control unit monitors the two input signals from the sensors and compares them for plausibility (factors such as mutual synchronicity, linearity, etc.).

Courtesy of BMW OF NORTH AMERICA, INC.

Spring elements retract the accelerator pedal to its initial position when it is released.