Toyota Camry Hybrid AHV40 Manual page 52

TH-52
6. Skid Control ECU Control
D The skid control ECU calculates the total braking force needed, based on the master cylinder pressure in
the brake actuator and brake pedal stroke sensor generated when the driver depresses the brake pedal.
D The skid control ECU computes a part for the required regeneration brake force from the total braking
force, and sends the result to the THS ECU.
D The THS ECU executes to the minus torque to MG2, and carries out the regenerative brake functions.
The skid control ECU controls the brake actuator solenoid valves and generates the wheel cylinder
pressure, which is the actual regenerative brake control value subtracted from the total braking force.
D The skid control ECU outputs a request to the THS ECU to effect motor traction control while the vehicle
is operating under TRAC or VSC function control. The THS ECU controls the engine, MG1, and MG2
in accordance with the present driving conditions in order to suppress the motive force.
" A
System Diagram
MG1
Inverter Assembly
ETCS-i
Control
MG2 Motive
Motor Traction
Control (for ECB*) Force Calculation
THS ECU
Battery Smart Unit
D Battery Condition
(1) : D Required regenerative brake force
D Required motive force (for TRAC or VSC Function)
(2) : D Actual Regenerative Brake Control Value
*: ECB (Electronically Controlled Brake System)
THS II (TOYOTA HYBRID SYSTEM II)
MG2
MG ECU
(2)
(1)
Skid Control ECU
Required
Regenerative Brake
Force Calculation
Required
Hydraulic Brake
Force Calculation
: CAN
(CAN No.1 Bus)
: Serial
Communication
Wheel Speed Sensors
Yaw Rate Sensor
Deceleration Rate Sensor
Steering Angle Sensor
Brake Pedal Stroke
Sensor
Brake Actuator
Master Cylinder
Pressure Sensor
(1, 2)
Accumulator
Pressure Sensor
Wheel Cylinder
Pressure Sensor
(FR, FL, RR, RL)
02HTH46TE