| 摘要 |
PURPOSE:To improve the transmission response by fixing the oil pressure of the oil chamber for the m+n speed of a sequence valve to the exhaust side forcibly, and engaging a friction element for engine brake immediately after the exhaust, when the engine brake pressure is output. CONSTITUTION:When a manual valve is selected to the second range in the D range, fourth speed condition, the oil pressure acts from an oil way 116, the spool 100 of the 4-2 sequence valve 72 is moved to the left regardless of the oil pressure of a port 110, an oil way 106 is linked to a drain port 108, and the oil pressure of the fourth speed application chamber is drained instantly and dropped. And the 2-range pressure of the oil way 116 (engine brake pressure) converts an overrun clutch control valve, feeds the oil pressure and engages the overrun clutch, and the engine brake is operated instantly. The engine brake is operated instantly after the selection to the engine brake range is made in such a way, and the transmission response can be improved. |
