Toyota Camry Hybrid AHV40 Manual page 134

3. ECB (Electronically Controlled Brake System)
General
D In this system, the conventional brake booster portion has been discontinued. Instead, it consists of brake
input, power supply, and hydraulic pressure control portions.
D During normal braking, the fluid pressure generated by the master cylinder does not directly actuate the
wheel cylinders, but serves as a hydraulic pressure signal. Instead, the actual control pressure is obtained
by regulating the fluid pressure of the hydraulic power source in the brake actuator, which actuates the
wheel cylinders.
D The ECB (Electronically Controlled Brake System) executes the hydraulic control of the ABS with EBD,
brake assist, TRAC, and VSC function in accordance with information provided by the sensors and
ECUs.
D The power source backup unit is used as an auxiliary power source, to supply power to the brake system
in a stable manner.
"
Outline of ECB (Electronically Controlled Brake System)
Master Cylinder
Pressure Sensor
Skid Control ECU
D Normal Brake, ABS with EBD, Brake
Assist, TRAC, and VSC Function
D Regenerative Brake Cooperative Function
D Power Steering Cooperative Function
Hydraulic Power
Source Portion
D Generates hydraulic
power using the
pump
CHASSIS - BRAKE
Brake Pedal Stroke
Sensor
Hydraulic Control Portion
D Hydraulic power is adjusted
to the required braking
force, and distributes it to
each wheel
Regenerative Brake Force
A
: Electrical Signal
: Fluid Pressure
EPS
D Steering Assist
THS II
D Regenerative Brake
Hydraulic
Brake Force
Brake Force
CH-33
277CH111