| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve responsiveness of a hydraulic switch while preventing the occurrence of on-off hunting of the hydraulic switch due to hydraulic vibration. <P>SOLUTION: The hydraulic controller 1 for an automatic transmission is composed as follows. A valve element 2b of an accumulator 2 shuts off a hydraulic switch circuit 5 from a detection circuit 4 when prescribed oil pressure is not applied to the detection circuit 4, and also, makes the hydraulic switch circuit 5 communicate with the detection circuit 4 when the prescribed oil pressure is applied to the detection circuit 4. An opening/closing element 11 makes the other end 5b of the hydraulic switch circuit 5 communicate with a discharge circuit EX when one end 5a of the hydraulic switch circuit 5 is not made to communicate with the detection circuit 4, and also, shuts off the other end 5b of the hydraulic switch circuit 5 from the discharge circuit EX when the one end 5a of the hydraulic switch circuit 5 is made to communicate with the detection circuit 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
