| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control device for an automatic transmission with a less number of parts. SOLUTION: The control device for the automatic transmission comprises a selector valve 60 having a capacity change-over part 62 and an interlock part 63, a clutch 70, and a plurality of friction elements. The capacity change-over part 62 is displaced depending on hydraulic pressure in a communication passage 130 to change over the capacity of the clutch 70. The interlock part 63 is displaced depending on hydraulic pressure in the communication passage 130 to output line pressure from a pressure control means to one of an Input/C20 or a LC/B21 and open the other to a drain, eliminating the need for providing the pressure control means for each of the Input/C20 and the LC/B21 and furthermore preventing the double engagement of the Input/C20 with the LC/B21. One selector valve 60 serves to operate as a capacity selector valve, a change-over means of pressure from the pressure control means and an interlock preventing valve, therefore a less number of parts of the hydraulic control device for the automatic transmission is required. COPYRIGHT: (C)2004,JPO&NCIPI
|
