Is Variable Steering Ratio Automatic?

[MacHarmony]

Variable steering ratio is not automatic. Steering ratio, also known as steering gear ratio, refers to the ratio between the steering wheel's turning angle and the wheel's turning angle. The function of variable steering ratio: It adjusts the steering gear ratio based on vehicle speed and steering angle. When the car is parked, moving at low speed, or making large steering angles, it provides a smaller steering gear ratio. Conversely, during high-speed driving or small steering angles, it offers a larger steering gear ratio, thereby enhancing the stability of the vehicle's steering. Mechanical variable steering ratio system: This system primarily modifies the "rack" in the "rack and pinion mechanism." The rack is specially processed with uneven tooth spacing. When the steering wheel turns, the pinion gear meshes with the unevenly spaced rack teeth, causing the steering ratio to vary. The central section of the rack has denser tooth spacing, resulting in smaller displacement within this range during minor steering adjustments (e.g., lane changes or slight directional corrections), making the vehicle feel more stable. The outer sections of the rack have sparser tooth spacing, leading to greater relative displacement of the rack when the steering wheel is turned sharply (e.g., during parking or U-turns), making the wheels more responsive.