| 摘要 |
PURPOSE:To enable a rapid speed change, by furnishing electromagnetic valves at oil pressure feeding circuits to connect an oil pressure source and hydraulic cylinders which shift or select the operation of transmission automatically, and controlling the oil pressure depending on the running condition. CONSTITUTION:At the oil pressure feeding circuits 9 and 10 to lead the discharged oil from am hydraulic pump 8 to a hydraulic cylinder 3 of a hydraulic clutch 1, which is installed between the output shaft of the engine and the input shaft of the transmission 2, and to a shift cylinder 7 in the transmission 2 respectively, electromagnetic valves 11 and 13 are furnished respectively. And at the oil pressure feeding circuits 9 and 10, pressure sensor 12 and 14 are furnished respectively, and their detected signals are, together with the detected signals of gear position sensor 15, an engine rotation sensor 16, and a propeller shaft rotation sensor 17, input to a computer 18. The electromagnetic valves 11 and 13 are controlled by the computer 18, according to the running condition, and the oil pressures to feed to the hydraulic cylinders 3 and 7 are controlled at an optimum condition. |
