Cruise Control Module: Description and Operation

GF30.30-P-3210GZ Component Description For The DTR Controller Unit
- with CODE (219) Distronic (DTR)







The DTR controller unit is located in the center behind the radiator grille.

Task
The DTR controller unit has the following tasks:
- Actuation, supply and evaluation of the signals received by the integrated DTR radar sensor (A89b1)
- Computation of the road geometry
- Control of target evaluation
- Transmission of data for control of longitudinal movement of the vehicle to the ESP control unit (N47-5)







The DTR radar sensor and the DTR control unit are integrated within the DTR controller unit

Function
The DTR control unit actuates the radar sensor and evaluates the target data. The radar data is transmitted from the DTR control unit via the drive dynamic CAN to the ESP control unit (for control of longitudinal movement of the vehicle by DISTRONIC).

Radar characteristics
- Detection range of the radar sensor from 10 m to 150 m
- Divergence of radar beam 9° (sharp focussing)
- 77 GHz radar sensor according to the "Pulse Doppler Principle" for independent measurement of distance and speed
- Fully-integrated electronic implementation (the DTR controller unit contains high-frequency circuits)







The radar plate is a radar transparent cover in the radiator grille which is necessary for correct functioning of the DISTRONIC.

Its tasks are as follows:
- Shielding against external effects (such as dirt, ice or insects)
- Ensuring optimal transmission and reception properties of the radar sensor