System Description
- SYSTEM DESCRIPTION
- The active stabilizer suspension system receives vehicle speed, steering angle, steering direction and other information Based on this information, the system operates the actuator (motor) installed to the center of the front and rear stabilizers. When the vehicle is turning, the system controls the twist angle of the stabilizer bar to decrease the sideways tilt of the vehicle and improve driving stability.
- The stabilizer bar operation is calculated based on signals from the actuator's magnetic pole sensor, steering sensor, yaw rate sensor, skid control ECU and steering control ECU
- The operation of the active stabilizer suspension system is stopped when the vehicle speed is 15 km/h (9 mph) or less, the vehicle is being driven in reverse, or a system malfunction is detected. When the system is malfunctioning, the actuator's motor short relay short-circuits the motor This causes the actuator to fix in place so that the stabilizer operates as a conventional stabilizer bar At this time, "Check Active Stabilizer Suspension System" is displayed by the combination meter's multi-information display, and a DTC is stored.
- FUNCTION OF COMPONENTS
- The active stabilizer suspension system consists of the following parts: 1) the front active stabilizer control actuator and rear active stabilizer control actuator, which twist the front stabilizer bar and rear stabilizer bar, 2) the front active stabilizer control ECU and rear active stabilizer control ECU, which operate and control the actuators; and 3) the power steering converter, which steps down the hybrid battery's high voltage to 46 V, and supplies power to the actuators through both ECUs The power steering converter is also used by the power steering system
- Immediately after the power switch is turned ON (READY), the front active stabilizer control ECU and rear active stabilizer control ECU perform an initial check During the initial check, the ECUs check the condition of the power steering converter and active stabilizer control actuators The initial check has completed normally if the Active Test can be performed normally
PART NAME DESCRIPTION CHARTPart Name Description Front active stabilizer control ECU Performs control and operation of front active stabilizer control actuator based on vehicle speed, steering angle and other information Has self-diagnosis function Rear active stabilizer control ECU Performs control and operation of rear active stabilizer control actuator based on vehicle speed, steering angle and other information Has self-diagnosis function Power steering converter condition signal is input into rear active stabilizer control ECU Front active stabilizer control actuator Twists stabilizer bar by using 46 V motor and 200 1 ratio reduction gear Has built-in magnetic pole sensor and motor short relay When the system is malfunctioning, motor short relay short-circuits motor circuit, which causes stabilizer to operate as conventional stabilizer bar Rear active stabilizer control actuator Operates in same way as front active stabilizer control actuator Power steering converter Voltage adjustment device for this system Steps down hybrid battery voltage to 46 V and supplies power to front and rear active stabilizer control actuators through front and rear active stabilizer control ECUs Also used by power steering system