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 signals for controlling the hybrid system.
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.
Item
|
Functionality
|
Demand Torque Determination
|
| • |
Driver Creep Demand Torque Calculation
|
| • |
Driver Acceleration/Deceleration Torque Calculation
|
| • |
Driver Total Demand Torque Calculation
|
|
Regeneration Brake Control
|
| • |
Regeneration Brake Demand Torque Control
|
| • |
Regeneration Brake Estimated Torque Calculation
|
|
EV/HEV Mode Determination
|
| • |
Engine Crank Condition Determination
|
| • |
Engine Target Operating Status Determination
|
|
Battery SOC Balancing
|
| • |
Electric Power Limitation
|
| • |
Charge/Discharge Power Determination
|
| • |
Auxiliary System Power Limitation and Compensation
|
|
Engine Operating Point Determination
|
| • |
Engine Target Speed Determination in Idle Load
|
| • |
Engine Target Torque Determination in Part Load
|
| • |
Engine Target Torque Determination in Full Load
|
| • |
Engine Target Torque Determination in Engine Stop or Passive
Run
|
|
Idle/Racing Charge Control
|
|
Engine Start/Stop Control
|
| • |
Speed Control for Cranking Engine
|
| • |
Engine Firing Complete Determination
|
|
Engine Clutch Engage/Slip/Release Control
|
| • |
Engine Brake Engage Control
|
|
Torque Coordination Control
|
| • |
Engine Torque Determination in Transient State
|
| • |
Motor Torque Determination in Transient State
|
| • |
Generator Torque Determination in Transient State
|
|
Torque Invention Control
|
| • |
Torque Increase/Decrease Determination
|
|
Anti-Shock Control
|
| • |
Parabolic Torque Restriction
|
| • |
Engine Clutch Slip Control
|
|
System Limit Control
|
| • |
Battery Charge/Discharge Limit Control
|
| • |
Engine, Hybrid Drive Motor, HSG Torque Limit Control
|
|
Torque Monitoring
|
| • |
Hybrid powertrain torque monitoring
|
|
Fail-Safe
|
| • |
Hybrid control system fail-safe control
|
|
Auxiliary System Control
|
| • |
Electric Oil Pump Control
|
| • |
Variable Voltage Control of Low Voltage DC/DC
|
|
Components and components location
Hybrid Power Control Unit (HPCU) Specifications