| 摘要 |
<p>PURPOSE: To increase a degree of freedom on a mounting position of a solenoid valve in a solenoid valve circuit for an automatic transmission to easily adjust the output pressure characteristic. CONSTITUTION: In a two-way duty solenoid valve (hereinafter, solenoid) 30, a minor diameter part 33 of a nozzle part is fitted to a minor diameter part receiving part 18 communicated to an outputted pressure oil passage 14, and a major diameter part 32 is fitted to a major diameter part receiving part 17 communicated to a supplied pressure oil passage 11. An opening of a through hole 38 is faced to the outputted pressure oil passage 14 through the minor diameter part receiving part, and an inner end of the through hole is opened and closed by a plunger 44, and communicated to a drain port 41. An orifice hole 43 communicated to the through hole 38 is opened to the major diameter part receiving part and communicated to the supplied pressure oil passage 11. The orifice hole bored on the solenoid, dispenses with a separate plate for an orifice, whereby the oil passage is simplified and the solenoid can be placed on an arbitrarily position. The output pressure characteristic can be adjusted only by replacing the solenoids respectively having a diameter of the orifice hole different from each other.</p> |
