Powershift transmission in a motor vehicle

A powershift transmission for a motor vehicle, wherein the powershift transmission is arranged between a prime mover and driven wheels of the motor vehicle, the powershift transmission being arranged for transmission of propulsive power and selection of different gear speed ratios, the powershift transmission comprising

• at least two frictional clutches for alternatively engaging at least two input shafts,
• a main transmission,
• a range section and an output shaft,
• the main transmission comprising the input shafts, a main shaft and a countershaft, the countershaft being parallel to the main shaft, and the countershaft carrying a plurality of gearwheels that are in mesh with gearwheels that are carried by one of the main shaft and the at least two input shafts, and
• the main shaft being arranged as an output member of the main transmission and being integral with or rotationally fixed to an input member of the range section,
• wherein an output member arranged in the range section is integral with or rotationally fixed to the output shaft, and
• wherein the range section is arranged with at least two alternating torque paths with different range speed ratios that can be established by selective engagement and disengagement of at least one range clutch, and
• wherein the countershaft is rotationally connectable to the output shaft in order to establish a by-pass torque path through which torque passes the range section without putting any load on any parts in the range section, and
• wherein propulsive power can be transmitted via the powershift transmission when the range section is gear shifted between the different range speed ratios, and wherein in the by-pass torque path, propulsive power is transmitted between a bypassing gearwheel, which bypassing gearwheel is coaxial with the countershaft, and a bypassing output gearwheel, which bypassing output gearwheel is coaxial with the output shaft,
• wherein the bypassing gearwheel is arranged on a bypassing shaft that is integral with or rotationally fixed to the countershaft, wherein the bypassing gearwheel is a loose gearwheel that can be selectively rotationally locked to the bypassing shaft by a bypassing clutch, wherein the bypassing output gearwheel is rotationally fixed to the output shaft.