Double clutch transmission
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Aug 24, 2015
filing date -
Aug 28, 2014
priority date (Note) -
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Abstract
A dual-clutch transmission having first and second clutches which selectively engage to couple a drive shaft with a respective first and second input shaft. The input shafts are coaxially aligned with the first input shaft extending through the second input shaft. A transmission output shaft is coaxially aligned with and extends behind the input shafts. Either six, seven or eighth forward gears and at least two reverse gears are produced by gearwheels that are arranged in six gearwheel planes on the input and the output shafts and a countershaft. The gearwheel planes are sequentially arranged axially along the transmission. Depending on the shifting positions of eight interlocking shifting elements, when six forward gears are provided, the last forward gear is a direct gear. In contrast, when either seven or eight forward gears are provided, the last forward gear, in each case, is an overdrive gear.
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