Abstract—All vehicles today have a fixed or set steering ratio for their steering mechanism depending upon the type and purpose of the vehicle.Steering ratio is the amount of rotation given to steering wheel for a unit degree rotation of road tires. But the performance of this system does not change with changing road and dynamic condition of vehicle. Hence there is a need to vary the steering ratio of vehicle depending upon the conditions in which it is being driven. For instance we require low steering ratio (12:1 to 7:1) during parking and low speed cornering condition whereas we require moderate steering ratio (18:1 to 24:1) at high speed to maintain dynamic stability of the vehicle. Using this steering gear box the driver can manually change the steering ratio of its vehicle to adjust to the condition. The following article focuses on production and use of this gear box on a typical vehicle.

Index Terms—Variable steering ratio, Continuous meshing gear box, Active steering, Manually operated gear shifting catcher

Cite: Devanjan Mishra, "Mechanically Variable Steering Ratio Gear Box," International Journal of Mechanical Engineering and Robotics Research, Vol.3, No.4, pp. 136-139, October 2014.