Dual clutch transmission for a motor vehicle

A dual-clutch transmission of a motor vehicle,

• first and second input shafts, the second input shaft being a hollow shaft and the first input shaft being coaxial with and extending through the second input shaft;
• an input side of the first input shaft being connectable, via a first friction clutch, to driveshaft of a drive engine, and an input side of the second input shaft being connectable, via a second friction clutch, to the driveshaft of the drive engine;
• a transmission side of the first input shaft being connectable with a first countershaft via a first input constant which comprises a drive input wheel and a drive output wheel, the first countershaft being selectively drivingly connectable with an output shaft by a plurality of spur gear stages which are engagable by respective gear shifting elements, and the output shaft being coaxially aligned with and axially spaced from the first input shaft;
• the second countershaft being selectively drivingly connectable with the output shaft by the plurality of spur gear stages which are engagable by the respective gear shifting elements, and the first countershaft being a hollow shaft and the second countershaft being coaxial with and extending through the first countershaft;
• the plurality of spur gear stages comprising first, second, third and fourth spur gear stages which engage forward gears and a reverse spur gear stage which engages reverse gears, the first spur gear stage having a transmission ratio, the second spur gear stage has a transmission ratio that is lower than the transmission ratio of the first spur gear stage, the third spur gear stage having a transmission ratio that is lower than the transmission ratio of the second spur gear stage, and the fourth spur gear stage having a transmission ratio that is lower than the transmission ratio of the third spur gear stage;
• the second spur gear stage and the fourth spur gear stage selectively coupling the first countershaft to the output shaft;
• the first and the third spur gear stages and the reversing spur gear stage selectively coupling the second countershaft to the output shaft;
• the first input constant having a higher gear ratio than the second input constant;
• the drive output wheel of the first input constant being a loose wheel, which is rotatably mounted on the second countershaft and being connectable, in a rotationally fixed manner, to the first countershaft by a first coupling shifting element;
• and
• the first countershaft being rotationally connectable to the second countershaft by a second coupling shifting element.