| 摘要 |
The hydraulic control system for an automatic transmission comprises a device for generating an actuating fluid pressure, with a first shift valve communicating the pressure generator to a first chamber. The first valve has an upshift position in which it supplies the actuating pressure to the chamber. A second shift valve communicates the pressure generator with first, second and third chambers. The second shift valve has a downshift position where it supplies actuating pressure to the second chamber and connects the first and third chambers, and an upshift position where it discharges the second and third chambers. |
