| 摘要 |
PROBLEM TO BE SOLVED: To improve total heat exchange performance by individually using a serial arrangement and a parallel arrangement depending on an operation condition.SOLUTION: On assumption that a working fluid heat exchange system of an automatic transmission 1 comprises a heat exchanger which heat-exchanges a transmission working fluid and a heat medium, the working fluid heat exchange system has, as heat exchangers, a first heat exchanger 2 which performs heat exchange with a first heat medium 12, and a second heat exchanger 3 which performs heat exchange with a second heat medium 13 which is different from the first heat medium 12. The first heat exchanger 2 and the second heat exchanger 3 are set in a working fluid heat exchange circuit A1 which is connected to the automatic transmission 1. As changeover structures for switching the alignment of the first heat exchanger 2 and the second heat exchanger 3 to serial alignment and parallel alignment, a first valve 9, a second valve 10 and a third valve 11 are arranged at the working fluid heat exchange circuit A1. |
