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: Steering Wheel Operation Graph (Steering Angle)

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: Steering Wheel Operation Graph - When Driving At Low Speed

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: Steering Wheel Operation Graph - When Driving At Middle Speed

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: Steering Wheel Operation Graph - When Driving At High Speed

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