| 摘要 |
PURPOSE:To maintain a favorable operating state all the time even in a cold district, etc., by constituting a solenoid valve so as to be opened or closed by means of a pulse, while compensating the pulse width in a manner conformable to oil temperature. CONSTITUTION:An oil temperature detector 23 is installed in a hydraulic circuit, and output out of this oil temperature detector 23 is inputted into a controller 30, then a solenoid valve SV is driven for its opening or closing with pulse width in a manner conformable to oil temperature. With this constitution, a variation in flow based on a difference in the oil temperature is compensable so that a favorable operating state is maintainable all the time even in a cold district or the like. |
