Operation Description

The following performance is gained by controlling the best front wheel steering angle and the rear wheel steering angle.

The desirable vehicle movement is gained toward the driver's steering angle operation (steering angle).
The steering gear ratio changes according to the vehicle speed. The steering wheel operation (steering angle) load decreases.

Fig 1: Front Steering Gear Ratio And Vehicle Speed Graph

Courtesy of NISSAN MOTOR CO., U.S.A.

When Driving at Low Speed

Increased front wheel angle gains the optimum front wheel angle by minimum steering wheel operation (steering angle).

Fig 2: Front Wheel Angle And Time Graph

Courtesy of NISSAN MOTOR CO., U.S.A.

When Driving at Middle Speed

Increase the front steering angle while controlling to turn the rear wheel steering angle to the same steering angle side of steering wheel operation (steering angle). these operations make response better for vehicle yaw rate/lateral acceleration and also decrease the angle of sideslip.

Fig 3: Front Steering Angle And Time Graph

Courtesy of NISSAN MOTOR CO., U.S.A.

When Driving at High Speed

Decrease the front wheel steering angle while controlling to turn the rear wheel steering angle to the same steering angle side of steering wheel operation (steering angle). these operations make car response better and vehicle stability higher.

Fig 4: Front Wheel Steering Angle And Time Graph

Courtesy of NISSAN MOTOR CO., U.S.A.