Double clutch transmission of a motor vehicle

Abstract

The invention relates to a double clutch transmission of a motor vehicle, comprising two input shafts (3, 4), which are disposed coaxially to each other and can be connected to the drive shaft (2) of a driving motor via a separate clutch (K1, K2). The invention further comprises two countershafts (11, 12), which are arranged parallel to the axis next to the input shafts (3, 4) and are connected and driven via a driven wheel (8, 9) by a common output element (10). The invention further comprises a plurality of gear wheel sets, comprising a plurality of toothed wheels, amongst others one fixed wheel and one loose wheel, wherein at least two wheels are in engagement with each other. The fixed wheels thereof are distributed on the two input shafts (3, 4) and are arranged rotationally fixed onthe associated input shaft (3, 4). The loose wheels are distributed on the two countershafts (11, 12), are rotationally arranged on the associated countershaft (11, 12) and can be connected thereto in a rotationally fixed manner by an associated clutch. Each of the two input shafts (3, 4) comprises at least one fixed wheel, which is associated with two gear wheel sets and engages with loose wheels arranged on different countershafts (11, 12). A double clutch transmission of this type, having six forward gears (G1 to G6) and one reverse gear (R), is proposed as a basic transmission, which has an uncomplicated and space-saving design and can be reduced by one gear to form a five speed transmission and be expanded by one gear to form a seven speed transmission in a simple and cost-effective manner.

Description

technical field [0001] The invention relates to a dual-clutch transmission for a motor vehicle, the dual-clutch transmission having: two input shafts arranged coaxially with each other and connectable to the drive shaft of the engine via an independent clutch each; the two axes are arranged in parallel on the input shaft a layshaft alongside and in driving connection with a common driven member via each driven wheel; and a plurality of variable speed gearsets each comprising at least two gears each held in mesh with each other, one of which is a fixed gear and one of which is an idler gear, The fixed gears of the variable-speed gear set are distributed on the two input shafts and are respectively arranged in a rotationally fixed manner on the assigned input shaft, while the idler wheels of the variable-speed gear set are distributed on the two countershafts and are respectively rotatably mounted on the assigned input shafts. On an assigned layshaft and possibly via an assigned...

AI Technical Summary

Problems solved by technology

but especially as from there figure 2 As is known, the expansion of the seventh gear would require a fundamentally additional arrangement of the transmission gear set and thus simultaneously result in disadvantageously high modification costs

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