System Description

The PHEV-ECU judges the possible regeneration amount according to the current vehicle status, and sends the information to the ABS actuator and electric unit (control unit).
When the brake operation is made during driving, the electric driven intelligent brake unit sends the brake pedal input (depressed amount) calculated based on the stroke sensor signal to the ABS actuator and electric unit (control unit).
The ABS actuator and electric unit (control unit) calculates the necessary regeneration amount and brake force distribution amount based on the possible regeneration amount and brake pedal input.
The ABS actuator and electric unit (control unit) sends the necessary regeneration amount information to the PHEV-ECU, and adjust the fluid pressure brake force based on the necessary friction force.
The PHEV-ECU calculates the regenerative brake force satisfying the necessary regeneration amount, and send the information to the inverter of the drive motor.
The drive motor inverter generates regeneration force by the drive motor and apply the regenerative brake.
The ABS actuator and electric unit (control unit) calculates the fluid pressure brake force again based on the calculated result of actual regeneration amount and fluid pressure brake force received from the PHEV-ECU.

The brake force equals to the sum of the fluid pressure brake force and the regeneration force.

note

The signal of the fluid pressure applied to the master cylinder is sent from the ABS actuator and electric unit (control unit) to the electric driven intelligent brake unit via CAN communication.

The signal of the fluid pressure generated at the master cylinder is sent to each brake caliper.
The regenerative brake control is not carried out just before the vehicle stops or while the vehicle is stopping.

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transaxle between each unit via communication lines is shown in the following table.

COMPONENT PARTS	SIGNAL DESCRIPTION
Electric driven intelligent brake unit	Refer to ELECTRIC DRIVEN INTELLIGENT BRAKE UNIT.
Buzzer	Refer to BUZZER.
Brake power backup unit	Refer to BRAKE POWER BACKUP UNIT.
Steering angle sensor	Mainly transmits the following signals to electric driven intelligent brake unit via CAN communication. Steering angle sensor signal
Combination meter	Mainly transmits the following signals to electric driven intelligent brake unit via CAN communication. Brake warning light signal Brake system warning light signal
ABS actuator and electric unit (control unit)	Mainly transmits the following signals to electric driven intelligent brake unit via CAN communication. ABS actuator and electric unit (control unit) control signal Vehicle speed signal RR LH wheel speed signal FR LH wheel speed signal RR RH wheel speed signal FR RH wheel speed signal Yaw rate signal Side G signal ABS actuator and electric unit (control unit) malfunction signal ABS actuator and electric unit (control unit) OFF signal Brake fluid pressure signal Mainly receives the following signals to electric driven intelligent brake unit via CAN communication. Electric driven intelligent brake unit control signal Brake assist request signal Brake power backup operation signal Brake power backup operation request signal Brake warning light illumination request signal Brake system warning light illumination request signal
PHEV	Mainly transmits the following signals to electric driven intelligent brake unit via CAN communication. PHEV control signal Actual regeneration torque signal PHEV status signal Shift position signal Mainly receives the following signal from the electric driven intelligent brake unit via CAN communication. Target brake force signal
BCM	Mainly transmits the following signals to electric driven intelligent brake unit via CAN communication. Sleep/wake up signal