Accelerator Pedal: Description and Operation

2080 - Accelerator Pedal Unit

The accelerator pedal unit is also new. It has been redesigned with the aim of reducing the individual components, which in turn has reduced the unit's weight by 60 % (approx. 1.3 lbs/600 g). This has been achieved through the integration of electronic pedal encoders 1 and 2 into the accelerator pedal unit as well as through the elimination of the short throttle cable.

NOTE: The accelerator pedal cannot be opened.

The accelerator pedal unit incorporates the pedal itself, kinematic mechanism with friction element, metal plate, spring assembly, pedal stop and the printed circuit board. On Tiptronic vehicles, the accelerator pedal unit also features a spring loaded aneroid diaphragm (3) for kickdown simulation. The integrated pedal stop obviates the need for a basic kickdown setting.







The new electronic pedal unit operates in non-contact mode (according to the induction principle) and is thus wear-free. The sensors on the p.c. board (A) are inductively activated by a metal plate. The supply voltage for the pedal unit is 5 V. The pedal encoder supplies the signals for pedal position 1 and pedal position 2. The respective signal voltages are comparable to the signal from previous potentiometers 1 and 2 which are supplied to the Motronic control unit as input signals.