Patent ID: 6481314
Filing Date: 2002-11-19
Classification: F16H,Y10T

Abstract:
A vehicle travelling control apparatus for a vehicle with an hydrostatic transmission (HST) and a mechanical transmission connected in tandem to said HST, said HST and said mechanical transmission interposed in a travelling power transmission path between a driving power source and driving wheels, which comprises:a speed-change control mechanism including a signal detection part and a control part for controlling the changing of the output speed of the HST and the shifting operation of the mechanical transmission; said signal detection part including a load-torque detection means for detecting the load torque with respect to the vehicle; and said control part being designed to control the mechanical transmission and the HST based upon the detected results by said load-torque detection means so that where the vehicle lies in a high load torque state, the control part downshifts the mechanical transmission to a lower speed stage, while increasing the output speed of the HST.