| 摘要 |
PURPOSE: A power train of an automatic transmission for a vehicle realizes advance 5 speeds and reverse one speed by using 3 planetary gear sets and 6 friction elements and minimizes a power loss by removing an element rotating faster than an input shaft and an output shaft on overdriving. CONSTITUTION: A power train of an automatic transmission for a vehicle realizes advance 5 speeds and reverses one speed by operating or not operating a clutch device and a brake device. Further, the power train minimizes a power loss by preventing 3 planetary gear sets from rotating faster than an input shaft and an output shaft on overdriving such as advance 4 speeds or 5 speeds. Furthermore, the numbers of friction elements are small such that the transmission is compacted and become light.
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