ABS Actuator and Electric Unit (Control Unit): Actuator
The following components are integrated with ABS actuator.
Pump
- Returns brake fluid to reservoir when wheel pressure is decreased.
- Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
Motor
Activates the pump according to signals from ABS actuator and electric unit (control unit).
Motor Relay
Operates the motor ON/OFF according to signals from ABS actuator and electric unit (control unit).
Actuator Relay
Operates each valve ON/OFF according to signals from ABS actuator and electric unit (control unit).
ABS In Valve
Switches the fluid pressure line to increase or hold according to signals from control unit.
ABS Out Valve
Switches the fluid pressure line to increase, hold or decrease according to signals from control unit.
Cut Valve 1, Cut Valve 2
Shuts off the ordinary brake line from master cylinder, when VDC function, TCS function, brake assist function, brake force distribution function, hill start assist function are activated.
Suction Valve 1, Suction Valve 2
Supplies the brake fluid from master cylinder to the pump, when VDC function, TCS function, brake assist function, brake force distribution function, hill start assist function are activated.
Inlet Valve
Brake fluid sucked from the reservoir by the pump does not backflow.
Outlet Valve
Brake fluid discharged from the pump does not backflow.
Return Check Valve
Returns the brake fluid from brake caliper to master cylinder by bypassing orifice of each valve when brake is released.
Reservoir
Temporarily reserves the brake fluid drained from brake caliper and wheel cylinder, so that pressure efficiently decreases when decreasing pressure of brake caliper.
Yaw Rate/Side/Decel G Sensor
Calculates the following information that affects the vehicle, and transmits a signal to ABS actuator and electric unit (control unit) via communication lines. [Yaw rate/side/decel G sensor is integrated in ABS actuator and electric unit (control unit).]
- Vehicle rotation angular velocity (yaw rate signal)
- Vehicle lateral acceleration (side G signal) and longitudinal acceleration (decel G signal)
Pressure Sensor
Detects the brake fluid pressure and transmits signal to ABS actuator and electric unit (control unit). [Pressure sensor is integrated in ABS actuator and electric unit (control unit).]