| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce load hysteresis, and improve control accuracy by making a supply oil pressure characteristic to an electromagnetic solenoid different, and making a supply oil pressure variation per a carrying electric current smaller on the low pressure side than the high pressure side. SOLUTION: A sub-valve 114 is arranged on the rear end of a pressure adjusting valve 104 in the shape of sandwiching a spring 102 so as to freely move in a valve body 108, and output pressure SC is made to act on the sub- valve 114 through a feedback passage 112a. The pressure adjusting valve 104 supplies the output pressure SC to a clutch oil pressure chamber to an increase in an electric current until the sub-valve 114 comes into contact with the land 108a when a plunger 100a is pressed since a solenoid 100 is excited. Afterwards, when the sub-valve 114 contacts with the land 108a, an increase quantity of a sub-valve load according to an increase in oil pressure thereafter is all received by the valve body 108, and a spring load does not increase more than that, and as a result, the feedback pressure receiving area becomes equivalent to reduction, and an oil pressure variation to an increase in an electric current increases.</p> |
