| 摘要 |
PURPOSE:To prevent the generation of a reverse steering phenomenon at the time of steering operation on a slope, and to obviate the feeling of a shock at the time of steering operation on a flat ground in the steering system of a clutch and brake type bulldozer. CONSTITUTION:A controller 25 is installed, and an inclination detector 4 in the longitudinal direction of a car body, a steering lever 5 and control valves 21, 22, 23, 24 controlling a right clutch 11, a right brake 12, a left clutch 13 and a left brake 14 are connected. when the steering lever 5 is operated to a right turn, the controller 25 transmits a control signal over the control valves 21, 22, the right clutch is turned OFF, the right brake is turned ON, and a bulldozer is turned to the right. The controller 25 receives a signal from the inclination detector 4 at that time, and a plus delay time is taken between the OFF of the right clutch and the ON of the right brake when an inclination is small, thus preventing a shock at the time of steering operation. When the inclination is large, a minus delay time is taken, and the delay time is adjusted in proportional to the inclination and the clutch and the brake are operated simultaneously, thus obviating a reverse steering phenomenon.
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