System Description

SYSTEM

SHIFT CHANGE CONTROL : System Description

- 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.





- 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.

MOTOR SPEED CONTROL

- TCM transmits motor speed control request signal to HPCM to get an aimed motor speed. HPCM transmits motor speed control request signal to traction motor inverter, based on which traction motor inverter controls traction motor.
- Motor speed control enables to synchronize input speed, which reduces shift shock and gives smooth shifting.