Adaptive Hydraulic Pressure Control

Adaptive Hydraulic Pressure Control







The GS 20 monitors engine speed via the CAN bus along with the transmission input and output speed signals simultaneously to determine the slip ratio and slip time during a shift Slip ratio and slip time are influenced by production related differences between transmissions and by aging.

The comparison of target & real slip allow the GS 20 to perform the adaptive pressure control function by modifying the PWM control of the main pressure regulator solenoid increasing the clutch apply pressures to compensate for internal slip. The adaptive pressure control function optimizes the shift quality and increases the life span of the clutch plates.

The adaptive pressure control feature is not an AGS function.

Clearing adaptation values with the DIS or MoDiC only clears this pressure control adaptation values. Clearing these values can lead to bad shift quality until the shift pressure is again optimized by the adaptation.