Rpm sensor component description - GF27.19-P-1112GA
TRANSMISSION 722.9 in MODEL 164.1 /8, 216, 221, 251.0 /1 up to Model Year 8 Output speed sensor
Location
The output speed sensor (VGS) is firmly fixed to the electric control unit (VGS) (Y3/8) and cannot be replaced individually.
Task
The output speed sensor (VGS) records the transmission output speed at the park pawl gear for the fully integrated transmission control (VGS).
This is processed by the fully integrated transmission control (VGS) control unit (Y3/8n4) as an input signal together with the information from the turbine speed sensor (VGS) and the internal speed sensor (VGS). This contributes to shortening the reaction time during shift operations.
Function
The transmission output speed is recorded using an exciter ring and a Hall difference sensor. This increases the measuring accuracy. 2 Hall generators and a bar magnet are integrated into the output speed sensor (VGS). Magnetic field changes occur due to the rotary motion of the exciter ring. As a result an induction difference arises between the two Hall elements of the Hall generators which changes its polarity due to the rotary motion. This polarity change is converted into an rpm signal by the electronic analysis system and evaluated by the fully integrated transmission control (VGS) control unit.