CHASSIS - STEERING
02HCH52Y
Torque Sensor Portion
Front
Motor Portion
Reduction Mechanism Portion
02HCH53Y
Ball Screw
Reduction Gear
Magnet
Coil
Rotation Angle
Sensor
Rack Shaft
Stator
Motor Potion
Rotor
Ball
CH-82
4. Constructions and Operation
Steering Gear Unit
1) General
A motor, reduction mechanism, and the torque sensor are enclosed in the steering gear unit.
2) Motor
The motor is a high power output, brush less type motor is used.
The motor, which is mounted coaxially to the rack shaft, consists of a rotation angle sensor, stator, and
rotor.
A ball screw reduction gear, which consists of a reduction mechanism, is installed on the rotor.
The balls transmit the rotational torque of the motor to the rack shaft in the form of axial force.
The rotation angle sensor consists of resolver sensors, which excel in reliability and durability. The
rotation angle sensor detects the rotation angle of the motor and outputs it to the EPS ECU. As a result,
it ensures efficient EPS control.