Patent ID: 7134355

Claim:
An increment shifted transmission ( 9 ) for motor vehicles comprising an in-going shaft mounted in a housing ( 8 ), at least one intermediate shaft ( 11 ) arranged in the housing, which exhibits at least one gear wheel ( 16 – 17 ) in engagement with a gearwheel ( 12 , 15 ) on the in-going shaft, a main shaft ( 10 ) arranged in the housing with gear wheels ( 15 , 21 , 22 , 23 ) which engage gear wheels ( 18 , 19 , 20 ) on the intermediate shaft, with at least one of the gear wheels in each pair of mutually engaging gear wheels on the intermediate shaft and the main shaft being rotatably arranged about its shaft and being, by means of coupling members ( 13 , 24 , 25 ), lockable on its shaft, and with maneuvering members ( 40 , 41 , 42 ) which interact with the coupling members and are controlled by a control unit ( 45 ) depending on signals fed through the control unit representative of various engine and vehicle data wherein the maneuvering members ( 40 , 41 , 42 ) are arranged to, in the case of in-signals to the control unit ( 45 ) which indicate a predetermined driving condition at which the fuel consumption of the vehicle is optimally low, be set by means of the control unit ( 45 ) so that a synchronized gear which is engaged at the time is set in neutral position, and in that the maneuvering members ( 40 , 41 , 42 ) are arranged to deactivate said neutral position when said driving condition is no longer present and wherein the control unit ( 45 ) is arranged to activate a free wheel function at at least one of the following driving conditions when driving with a predetermined speed (vset; vcc): i) the vehicle is considered to accelerate at an activated free wheel function, and retard without said activated free wheel function; ii) the vehicle is considered to maintain constant speed at said activated free wheel function and retard without said activated free wheel function, and iii) the vehicle is considered to retard at said activated free wheel function and retard without said activated free wheel function.