Mechatronics of the automatic gearbox

The mechatronics of the GM6 automatic gearbox consist essentially of the electrohydraulic gearbox control module and the hydraulic selector unit.

Electrohydraulic gearbox control module

The electrohydraulic gearbox control module is divided mainly into the following components:

• EGS control unit
  
• Electronic pressure control valves, solenoid valves (integrated)
  
• Gearbox sensor system:
  
  • Sensor for the gearbox input speed
    
  • Sensor for the gearbox output speed
    
  • Gearbox oil temperature sensor
    
• Gearbox connector for connection to vehicle wiring harness
  

EGS control unit

The EGS control unit controls gearshift points, the shift quality, engaging and disengaging the converter clutch, as well as the line pressure. The EGS control unit and all the electronic control elements, for example pressure control valves, solenoid valves and engine speed sensors are integrated in one assembly, the electrohydraulic gearbox control module.

Hydraulic selector unit

The hydraulic selector unit is similar to the selector units commonly used until now in gearboxes. It is also designed as holder for the electrohydraulic gearbox control module.