GF27.10-P-0002LEH Automatic Transmission Hybrid Drive Function

GF27.10-P-0002LEH Automatic transmission hybrid drive function
- TRANSMISSION 722.950

Automatic transmission (AT), general
Transmission 722.950 is an electronically controlled automatic transmission with 7 forward gears and 2 reverse gears. The ratios for the gear stages are achieved by planetary gear sets. All the transmission functions and components for this transmission are combined in one assembly module.

The integration of the electric controller unit (VGS) (Y3/8) in the transmission means that the interfaces to the wiring harness have been minimized. This improves the shift quality, increases the service life and reliability and also lowers maintenance costs.

The transmission can be subdivided into the following assemblies:

- Torque converter with torsional damper and torque converter lockup clutch
- Oil pumps for generating the necessary oil pressure and for safe lubrication of actuators and bearing points
- Transmission housing with mechanical transmission components (planetary gear sets, park pawl, multidisk clutches and multidisk brakes) and controller unit

The following table presents the model and major assembly overviews for transmission 722.950:





Data is exchanged with the following control units via the drive train CAN (CAN C):

- Intelligent servo module for DIRECT SELECT (A80)
- ME-SFI [ME] control unit (N3/10)
- Transmission oil auxiliary pump control unit N89

Data are exchanged with the following control units via the chassis CAN (CAN E):

- Regenerative braking system control unit (N30/6)
- EZS control unit (N73)
- Steering column module (N80)
- Central gateway control unit (N93)

Data are exchanged with the following control unit via the interior CAN (CAN B):

- Front SAM control unit with fuse and relay module (N10/1)

Data are exchanged with the following control unit via the central CAN (CAN F):

- Instrument cluster (A1)

Data are exchanged with the following control unit via the telematics CAN (CAN A):

- Front central operating unit (A40/9)

The operating conditions of the transmission and the active component functions of the transmission control is described in the following documents:

^ Power flow, function
^ Power flow in 1st gear, function
^ Power flow in 2nd gear, function
^ Power flow in 3rd gear, function
^ Power flow in 4th gear, function
^ Power flow in 6th gear, function
^ Power flow in 6th gear, function
^ Power flow in 7th gear, function
^ Power flow in reverse gear, transmission mode "S", function
^ Power flow in reverse gear, transmission mode "C", function
^ Gear shift, function
^ Transmission control, function
^ Engage gear range, function
^ Oil supply for automatic transmission, function
^ Transmission oil cooling, function
^ Emergency default mode, function
^ Key-P function
^ Emergency-P function
^ Working/lubrication/shift pressure, function
^ Control valve pressure, function
^ Torque converter lockup clutch control, function
^ Torque converter lockup clutch control pressure, function