Description
The HCU (Hybrid Control Unit) controls whole hybrid systems and is connected with each control modules (ECM, TCM, MCU, BMS ECU etc.) by CAN interface. In addition this system uses the brake switch and Clutch Pressure Sensor (CPS) signals for controlling the hybrid system.
Note. CAN interface is divided into hybrid and chassis CAN lines.
Scheme 86
The HCU controls power & torque distribution of the engine and motor, regenerative brake, and fail-safe mode based on the vehicle information, driver's demand, engine information and high voltage battery information.
Scheme 87
The Hybrid Power Control Unit (HPCU) is an integrated power conversion unit which consists of the two inverters, LDC, and HCU.
Scheme 88
The Brake Switch is installed on the brake pedal and linked with the HCU and stop lamp. It sensors the status of the brake pedal (Release, Push) and transmits the signal to the HCU.
Scheme 89
The engine clutch is installed inside the hybrid drive motor assembly and operated by hydraulic pressure. It mechanically connects or disconnects the engine drive power to the transaxle and its oil pressure is sensed by the Clutch Pressure Sensor (CPS). The HCU can recognize the vehicle driving mode (EV Mode, HEV Mode) by using this signal. This sensor is located beside the electric oil pump in the transaxle housing.
