Armstrong, Westerman, Hattori, McLeland & Naughton
Turning speed control system for use in a track-laying vehicle
 A turning speed control system for use in a track-laying vehicle comprising: a steering motor for driving crawler belts provided at both sides of the vehicle such that a relative travel difference is caused between the crawler belts, thereby turning the vehicle to the right or left; a steering instructing device which can be displaced from a neutral position by operation and which instructs, according to the direction and distance of its displacement, a turning direction and a turning radius for the vehicle, the turning radius decreasing as the displacement distance increases; a displacement detector for detecting the displacement of the steering instructing device; and a control unit for performing a control such that when making the turning radius of the vehicle small by increasing the revolution speed of the steering motor according to the displacement of the steering instructing device detected by the displacement detector such that the crawler belts are driven with a relative travel difference therebetween, if the displacement distance of the steering instructing device exceeds a maximum steering motor revolution speed displacement value at which the steering motor reaches its maximum revolution speed, the vehicle speed at which the vehicle moves forwards or backwards is reduced as the displacement of the steering instructing device proceeds, while the maximum revolution speed of the steering motor being maintained, until the steering instructing device reaches a position corresponding to its maximum displacement value. 
Kabushiki Kaisha Komatsu Seisakusho
F F B
F16H F16H B62D
additional inventional inventional
Tsutomu Hideki Ryoichi
Ishino Yamada Maruyama