| 摘要 |
<p>PURPOSE:To allow hydraulic clutches to be operated in the constant state onto the transmission side by a solenoid valve regardless of the individual difference of the solenoid valve by operating clutch operating means by operating commands from a first and a second regulating means and a clutch operating means so that an operating current not less than the value of the detected operating current is fed to the solenoid valve. CONSTITUTION:A first regulating means is provided to make an operating current gradually rise from the zero value to feed it to a solenoid valve 35, and a second regulating means is provided to detect the value of the operating current at the time of starting to rotate a transmission system on the lower side of hydraulic clutches 5, 6 from the stop state when the operating current is operated to rise by the first regulating means. A low speed clutch 26 and a high speed clutch 27 which are clutch operating means are operated by operation commands from the first and second regulating means and a clutch operating means 57 so that the operating current not less than the value of the detected operating current is fed to the solenoid valve 35. The hydraulic clutches 5, 6 can be thereby operated in the constant state onto the transmission side by the solenoid valve 35 regardless of the individual difference of the solenoid valve 35.</p> |
