| 摘要 |
The present invention is a structure of a control valve body (1) of an automatic transmission in which the control valve body (1) is formed by sandwiching a separate plate (30) between valve body enclosures (10) and (20). Openings of channels (10a) and (20a) formed on respective opposing surfaces of the valve body enclosures (10) and (20) are closed with the separate plate (30) sandwiched between the valve body enclosures (10) and (20), and oil passages (11) and (21) are formed and separated on one side and the other side of the separate plate (30). The oil passages (11) and (21) communicate with each other through an orifice (31) provided at the separate plate (30). In the valve body enclosure (20) in which a channel (20a) corresponding to the downstream side oil passage (21), in a flow direction of working fluid, of one side and the other side oil passages (11) and (21) is formed, a protruding section (22) protruding toward the opening side of the channel (20a) is provided in the channel (20a), then a depth h of an area facing to the orifice (31) in the channel (20a) is set to be shallower than a depth H1 of the other area where the protruding section (22) is not provided. Further, the depth h of the channel (20a) in the part facing to the orifice (31) and a diameter d of the orifice (31) are set so as to satisfy a relationship of h ‰¦ 3d. |
