| 摘要 |
PROBLEM TO BE SOLVED: To travel in two-wheel drive condition even on a sloped ground having a sharp lateral inclination by providing a sensor for detecting the inclination amount of a machine body, and a sensor for detecting the steering amount of steering wheels, and controlling switching between the four-wheel drive condition and the two-wheel drive condition in which only the front wheels or the rear wheels are driven according to the detection result of each sensor. SOLUTION: Sensors such as a two-wheel drive and four-wheel drive select switch 15 are connected to the input side of a controller 14a, and a solenoid 70a of a control valve is connected to the output side. When the two-wheel drive and four-wheel drive select switch 15 is operated to the four-wheel drive, the output of the solenoid 70a is turned off to perform four-wheel drive, and when it is operated to the two-wheel drive, it is determined whether the value of the lateral inclination sensor 16 and the steering amount sensor 11 are in the two-wheel drive region or in the four-wheel drive region, when the lateral inclination amount is a regulated value (15 degrees) or more, and when the steering amount is a regulated value (60 degrees) or more, four-wheel drive is performed regardless of the size. In traveling the lateral inclination ground along a contour line, traveling can be performed in the two-wheel drive condition of only the front wheels or the rear wheels.
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