SHIFT CHANGE CONTROL: System Description: Notes

The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Thus, the clutch pressure is adjusted to be appropriate to the engine and motor load state and vehicle driving state. It becomes possible to finely control the clutch hydraulic pressure with high precision and a smoother shift change characteristic is attained.

Fig 1: Shift Change Control - Operation Diagram
Courtesy of NISSAN NORTH AMERICA, INC.
The clutch is controlled with the optimum timing and oil pressure by the motor speed, motor torque information, etc.
When motor regeneration is active, higher tightening and release pressures are applied taking account of portion for motor regeneration to prevent insufficient speed control.