Steering: Description and Operation

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: SYSTEM DIAGRAM









SYSTEM DESCRIPTION

1. DESCRIPTION

* The power steering system generates torque through the operation of the motor and the reduction gear installed on the column shaft in order to assist steering effort.

* The power steering ECU assembly determines the direction and the amount of assist power in accordance with vehicle speed signals and signals from the torque sensor built into the steering column assembly. As a result, the power steering ECU assembly adjusts the steering effort so that it is lighter during low speed driving and heavier during high speed driving.

(a) Power steering ECU assembly:

The power steering ECU assembly calculates assist power based on steering torque signals from the torque sensor and vehicle speed signals from the skid control ECU.

(b) Torque sensor:

The torque sensor detects the steering effort generated when the steering wheel is turned and converts it to an electrical signal.

(c) Power steering motor:

The power steering motor is activated by the current from the power steering ECU assembly and generates torque to assist the steering effort.

(d) Motor rotation angle sensor:

The motor rotation angle sensor consists of a resolver sensor, which excels in reliability and durability. The rotation angle sensor detects the rotation angle of the motor and outputs it to the power steering ECU assembly. As a result, it ensures efficient EPS control.