Pre-selection of gear for a double-clutch transmission

A powertrain for preselecting gear, comprising:

• a speed sensor mounted on the powertrain;
• a transmission control unit connected to the speed sensor;
• a double-clutch transmission controlled by the transmission control unit, the double-clutch transmission further comprising:
• an inner input shaft;
• an outer input shaft enclosing a portion of the inner input shaft;
• an inner clutch disc connected to the inner input shaft and an outer clutch disc connected to the outer input shaft;
• a first layshaft and a second layshaft spaced apart from the input shafts and arranged in parallel to the input shaft and the output shaft;
• a pinion on one of the layshafts for outputting drive torque;
• gearwheels arranged on the first layshaft, on the second layshaft, on the inner input shaft and on the outer input shaft;
• wherein the gearwheels comprise a first gearwheel train, a second gearwheel train, a third gearwheel train, a fourth gearwheel train and a fifth gearwheel train for providing five sequentially increasing forward gears respectively,
• wherein the first gearwheel train comprises a gearwheel first gear on one of the input shafts, meshing with an idler first gear on one of the layshafts;
• wherein the third gearwheel train comprises a gearwheel third gear on one of the input shafts, meshing with an idler third gear on one of the layshafts,
• wherein the fifth gearwheel train comprising a gearwheel fifth gear on one of the input shafts, meshing with an idler fifth gear on one of the layshafts
• wherein the second gearwheel train comprising a gearwheel second gear on the other input shaft, meshing with an idler second gear on the other layshaft
• wherein the fourth gearwheel group comprising a gearwheel fourth gear on the other input shaft, meshing with an idler fourth gear on the other layshaft
• wherein each gearwheel train comprising a coupling device on one of the layshafts to selectively engage one of the idler gearwheels for providing one of the five gears, and
• wherein an output gearwheel on an output shaft for meshing with the pinion,
• wherein the transmission control unit is configured to control the double-clutch transmission for preselecting a next gear depending at least two types of transmission speed of the double-clutch transmission.