| 摘要 |
An apparatus for controlling an oil-pressure-operated transmission for a vehicle, with a transmission having at least two forward speeds driven by oil pressure clutches, a reverse speed using one of these clutches, and a selector for shifting from forward speed to reverse to engage any of the forward and reverse trains. A manual valve is placed in the transmission hydraulic circuit so that when the manual valve is in automatic shift range on the forward running side, the selector is shifted to its forward running side and the oil pressure clutches in the forward driving trains receive pressure oil from an oil pressure source through a shift valve. When the manual valve is in its reverse position, the selector is shifted to its reverse side and oil is ported to the oil pressure clutch used jointly by the forward and reverse driving trains. The manual valve is located in an oil passage between the shift valve and the jointly used oil pressure clutch. When in automatic shift range, the oil passage is connected, but when in the reverse range, the oil passage is disconnected. At the same time, a downstream portion of the oil passage connected to the oil pressure clutch is connected to the oil pressure source without oil passing through the shift valve.
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