Toyota Camry Hybrid AHV40 Manual page 157

CH-56
d. Pressure Reduce
The skid control ECU calculates the target wheel cylinder pressure (equivalent to the brake force
required by the driver) in accordance with the signals received from the master cylinder pressure sensor
and the brake pedal stroke sensor.
The skid control ECU compares the wheel cylinder pressure signal with the target wheel cylinder
pressure. If the target wheel cylinder pressure is higher, the skid control ECU reduces the pressure in
the brake actuator. Accordingly, the pressure in the wheel cylinder decreases.
Moreover, this operation is the same when the hydraulic brake force must be decreased in order to effect
cooperative control in accordance with the changes in the regenerative brake force.
Brake Pedal
Stroke Simulator
Accumulator
Port (C)
(3)
Port (G)
(7)
Front Left
Master Cylinder Cut Solenoid Valve
(1) (2) (1), (2)
Port: (A), (B)
Pressure Appliance Solenoid Valve
(3), (4), (3), (4),
(5), (6)
Port: (C), (D), (E), (F)
Pressure Reduction Solenoid Valve
(7) (9) (7), (9)
Port: (G), (I)
Pressure Reduction Solenoid Valve
(8), (10) (8) (10)
Port: (H), (J)
Stroke Simulator Cut Solenoid Valve
(11) (11)
Port: (K)
*: The solenoid valve constantly regulates the amount of opening of the port in accordance with the use
conditions in order to control the fluid pressure.
CHASSIS - BRAKE
(11)
Port (K)
Pump
Port (A)
(1)
Accumulator
Pressure Sensor
Port (D)
(4)
Port (H)
Port (I)
(8)
Wheel
Cylinder
Pressure
Sensor
Rear Left
Item
(2)
Port (E)
(5)
Port (J)
(9) (10)
Wheel
Cylinder
Pressure
Sensor
Front Right
Normal Braking
Reduction Mode
ON (Close) ON (Close)
OFF (Close) OFF (Close)
ON (Half Open*) ON (Half-Open*)
ON (Half Open*) ON (Half-Open*)
ON (Open) ON (Open)
Master
Cylinder
Pressure
Sensor
Port (B)
Port (F)
(6)
Rear Right
256CH110