Advance Method of Measuring “TCD” Turning Circle Diameter for Vehicle

Turning circle diameter (TCD) of vehicle is critical parameter which is used to determine the turning capability of vehicle. TCD is the smallest circular turn that a vehicle can make of given drive track. The TCD depends on vehicle wheel lock angles, wheelbase, and geometric architecture of vehicle. The Regulation certification requirement of steering system, states that the maximum TCD should be less than 24m & TCCD (Turning clearance circle diameter) 25m (M&N category Vehicle). IS 12222:2011 & UN R79 are regulation related to Steering system. This invention relates to measuring the TCD of vehicle. The conclusion of this technical paper proposes new innovative method to overcomes and address the below limitations.

It provides accurate and precise results by adjusting room for error. It eliminates the approximation ambiguity. It reduces the manual intervention of human effort to carry out the entire measurement process. It improves the safety of measurement technician, since it involves mounting of sensor during vehicle static condition and do not need to trace the vehicle outer position using chalk as per current measurement method.