| 摘要 |
PURPOSE:To permit the coincidence of the turning direction in advance and retreat by controlling the normal/reverse revolution of a steering motor for turning a car body left and right by driving each belt on the left and right sides of the car body so that the relative traveling difference is generated, on the basis of the advance/retreat state of the car body, according to the leftward/rightward turn instruction of the car body. CONSTITUTION:A mechanical transmission part 24 and a static hydraulic pressure transmission part 25 are arranged in parallel on a transmission input shaft 23 connected with the output shaft 22 of an engine 1. Further, a differential part 27 and a steering part 28 are installed continuously with a transmission output shaft 26. The normal/ reverse revolution-enabled steering motor 80 in the steering part 28 drives each belt in the left and right side parts of the car body so that a relative traveling difference is generated, and turns the car body leftward and right ward. A control part 96 controls the normal/reverse revolution of the steering motor 80 on the basis of each detection signal supplied at least from a throttle position detector 93, steering lever displacement detector 94, and an advance/retreat lever position detector 95. Accordingly, the normal/reverse revolution of the steering motor 80 is controlled on the basis of the advance/retreat state of the car body, according to the leftward/rightward turn instruction of the car body. |
