| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit for a four-wheel drive vehicle in which flow of operating fluid to each lubricating part can be secured without causing enlargement of an oil pump. SOLUTION: Operating fluid from an oil cooler 84 lubricates only major parts of an automatic transmission 30 (such as a front planetary gear unit 31, a rear planetary gear unit 41, a low clutch 55, a low and reverse brake 57, etc). Operating fluid to lubricate each part of a transfer device 60 is fed through an oil path 87 branched from an oil path 80 on the upstream side of the oil cooler 84. Circuit resistance related to the whole operating fluid to be supplied as lubricating oil to the automatic transmission 30 and the transfer device 60 can thus be extraordinarily reduced. COPYRIGHT: (C)2004,JPO&NCIPI
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