Toyota Camry Hybrid AHV40 Manual page 154

System Operation
1) Normal Brake Operation (with Regenerative Brake Cooperative Control)
a. General
D During normal braking, the master cylinder cut solenoid valves are closed and the fluid pressure
circuits to the wheel cylinders remain independent. Accordingly, the fluid pressure generated by the
master cylinder will not directly cause the wheel cylinders to actuate.
D The skid control ECU calculates the braking force required by the driver in accordance with the
signals received from the master cylinder pressure sensors and the brake pedal stroke sensor. Then,
the skid control ECU calculates the regenerative brake force value out of the required brake force
and transmits the calculated value to the THS ECU. Upon receiving the value, the THS ECU
generates a regenerative brake force. At the same time, the THS ECU transmits the actual
regenerative brake force value to the skid control ECU. The skid control ECU controls the solenoid
valves in order to cause the hydraulic brake system to generate a brake force value (which is obtained
by subtracting the regenerative brake force from the brake force value required by the driver).
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System Diagram
Brake Actuator
Master Cylinder
Pressure Sensors
Wheel Cylinder
Pressure Sensors
Brake Pedal
Stroke Sensor
Stop Light Switch
Combination Meter
ECB* Warning Light
Brake System
Warning Light
*: ECB (Electronically Controlled Brake System)
CHASSIS - BRAKE
A
Skid Control
ECU
THS ECU
Brake Actuator
Pressure Appliance
Solenoid Valves
Pressure Reduction
Solenoid Valves
Brake Pedal
Stroke Simulator
VSC Warning
Buzzer
CAN
(CAN No.1 Bus)
Regenerative
Brake
CH-53
02HCH21P