| 摘要 |
An automatic transmission, which has automatic shift ranges and manual setting ranges having a first speed gear position at which an engine brake is operable, is constructed in such a manner that a first friction element engaged at the first speed gear position and at a backward driving gear position is connected to a pressure regulating valve controlled by a timing solenoid valve. If a gear position is automatically shifted from a gear position at which the first friction element is unengaged to a gear position at which the first friction element is engaged, the timing solenoid valve is kept on for a predetermined time to delay the engagement of the first friction element to thereby prevent the shock from the shift. If the gear position is manually shifted from a gear position at which the first friction element is unengaged to a gear position at which the first friction element is engaged, the timing solenoid valve is immediately switched to an OFF state to quickly engage the first friction element and obtain the engine brake.
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