| 摘要 |
The system for producing a pressure signal whose magnitude represents locked and unlocked operation of a converter clutch in the automatic transmission having multiple speed ratios, comprises a first source of pressure representing forward drive operation of the transmission, and a second source of pressure representing operation of the transmission in a first forward speed ratio. The system also includes a source of regulated pressure, a third source of pressure having a range of magnitude that varies in response to engine speed, and an outlet port. The lock-out valve produces converter lock-out pressure having a first magnitude representing a command to unlock the converter by opening a connection between the source of regulated pressure and the outlet port, and a second magnitude representing a command to lock the converter in response to the effect of the first, second and third pressure sources. |
