| 摘要 |
PURPOSE:To determine the inclination of a position by way of the oil pressure in a hydraulic cylinder and obtain a controller with good response in the horizontal position controller of cars, such as tractors which are provided with the hydraulic cylinder to let wheels rise and fall for the car body. CONSTITUTION:Both the right and left front wheels 2L and 2R and rear wheels 5L and 5R are mounted on the car body of a tractor through the parallel links 3L, 3R, 6L, and 6R. The respective wheels 2L, 2R, 5L, and 5R can freely rise and fall for the car body 1 by way of the hydraulic cylinders 4L, 4R, 7L, and 7R. The working oil pressure in each hydraulic cylinder is detected by the pressure detectors 10L, 10R, 11L, and 11R and the inclination of the car body 1 is determined by the relative difference of the detection value in the control section 20. Since this premits the solenoid valves 8L, 8R, 9L, and 9R to be actuated and the horizon of the car body 1 to be maintained, control is enabled with good response. |
