| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a plug from being moved when a negative pressure state is generated on the plug side within a body cylinder of an accumulator. <P>SOLUTION: The accumulator 1 provided in a hydraulic circuit of an automatic transmission includes: a piston 11 which is provided to be axially movable in a body cylinder 10; a spring 12 which biases the piston 11 toward one end of the body cylinder 10; a plug 20 which is fitted into on an open end 10b side of the body cylinder 10 and to which a base end 12a of a spring 12 is attached; a back pressure oil passage 14 which is formed at the plug 20 side in the body cylinder 10 to supply a working fluid passed through an orifice 15 into the body cylinder 10; and an oil passage 13 which is connected to one end side of the body cylinder 10 to make the body cylinder 10 communicate with the hydraulic circuit. The plug 20 includes a through-hole 23 and a one-way valve 22 which allows the inflow of oil outside the body cylinder 10 into the body cylinder 10 through the through-hole 23. <P>COPYRIGHT: (C)2013,JPO&INPIT |
