Abstract: Transmission comprising four planetary gear sets, shafts and six shift elements. Sun of first set is connected to fifth shaft, which is connected to sun of second set and is couplable to housing by second brake. Driveshaft is connectable by first clutch to fourth shaft connected to carrier of second set and is couplable by first brake to housing. Driveshaft is connectable by second clutch to seventh shaft connected to ring gear of second set and sun of third set, and is connectable by third clutch to eighth shaft connected to carrier of third set. Eighth shaft is connectable by fourth clutch to third shaft connected to ring gear of fourth set. Sixth shaft is connected to ring gear of third set and carrier of first set. Sun of fourth set is coupled to housing. Output shaft is connected to carrier of fourth set and ring gear of first set.

Abstract: Multi-stage transmission comprising four gear sets, shafts and shift elements. Sun of first set is connected to eighth shaft connected to sun of second set and is connectable, via third clutch, to drive shaft. Drive shaft is connectable, via first clutch, to fourth shaft connected to ring of first set and is couplable, via first brake, to the housing. Drive shaft is connectable, via second clutch, to seventh shaft connected to carrier of second set and being connectable, via fourth clutch, to third shaft which is connectable to ring of third set. Sixth shaft is connected to ring of second set and carrier of fourth set. Sun of third set is coupled to housing. Fifth shaft is connected to carrier of first set and sun of fourth set and is couplable, via second brake, to housing. Output shaft is connected to carrier of third set and ring of fourth set.

Abstract: Nine gear transmission with four planetary gear sets, rotatable shafts and six shift elements. Sun of first set is connected to fifth shaft connected to sun of second set and is couplable to housing by third brake. Drive shaft is releasably connected by first clutch to fourth shaft connected to carrier of second set and is couplable by second brake to housing. Drive shaft is connectable by of second clutch to seventh shaft connected to ring of second set and sun of third set and is connectable by of third clutch to eighth shaft connected to ring of fourth set and carrier of third set. Shaft (6) is connected to ring of third set and carrier of first, and third shaft is connected to sun of fourth set and is couplable by first brake to housing. Output shaft is connected to carrier of fourth set and ring of first set.

Abstract: A four-stage multi-stage transmission in which carrier of first gear set and ring gear of fourth gear set can be coupled to housing via first brake or to drive shaft via first clutch. Sun of first gear set can be coupled to housing via second brake. Ring gear of first gear set and sun of second gear set can be coupled to drive shaft via second clutch. Drive shaft can be coupled to ring gear of second gear set via third clutch. Carrier of second gear set is permanently connected to carrier of fourth gear set, and carrier of third gear set and sun of fourth gear set are permanently connected to drive shaft. By varying further couplings within the multi-stage transmission, a set of gears having similar properties is provided.

Abstract: Transmission with four gear sets, shafts and six shift elements. Sun of first set is connected to fifth shaft, which is couplable to housing by second brake and connectable by first clutch to driveshaft, which is connectable to seventh shaft connected by second clutch to carrier of second set and is connectable by third clutch to eighth shaft connected to carrier of first set and to sun of second set. Seventh shaft is connectable to third shaft connected to ring gear of third set by fourth clutch. Sixth shaft is connected to ring gear of second set and carrier of fourth set. Fourth shaft is connected to ring gear of first set and to sun of fourth set and is couplable to housing by first brake. Sun of third set is coupled to housing. Output shaft is connected to carrier of third set and to ring gear of fourth set.

Abstract: A multi-gear transmission of a vehicle having a housing in which four planetary gearsets and a plurality of shafts and shifting elements are arranged. The drive input shaft can couple the sun gears of gearsets (RS1, RS3) and the carrier of gearset (RS1) and can be connected indirectly to the carrier of gearset (RS2). The drive output shaft couples the ring gear of gearset (RS4) and is connected directly or can be indirectly connected to the carrier of gearset (RS3), the sun gear and carrier of gearset (RS1) and the sun gear of gearset (RS4) can be connected to the housing. The ring gear of gearset (RS1) couples the carrier of gearset (RS4) and can be or is connected to the sun gear of gearset (RS2), and the ring gear of gearset (RS2) and the ring gear of gearset (RS3) are, or can be, connected to one another.

Abstract: A four-stage multi-gear transmission in which the carrier of a fourth gearset (4) is connected in a rotationally fixed manner to a housing (72), a ring gear of a first gearset (1) is connected rotationally fixed to a sun gear (41) of the fourth gearset (4), a drive input (70) can couple, via a first clutch (61), a sun gear (11) of the first gearset (1), a ring gear (42) of the fourth gearset (4) can couple, via a second clutch (62), a drive output (71), a carrier (13) of the first gearset (1) can couple, via a first brake (51), a housing (72) and the sun gear (11) of the first gearset (1) can couple, via a second brake (52), the housing (72). Varying other couplings within the multi-gear transmission can provide a range of transmissions with similar properties.

Abstract: A multi-ratio transmission with nine forward and one reverse gear. Sun gears of first and third gearsets (P1, P3) are couplable, via brake (04), a housing. Carrier of third gearset (P3) and sun gear of second gearset (P2) are couplable, via clutch (13), to input shaft or coupled, via brake (03), housing. Input shaft detachably couples, via clutch (16), ring gear of third gearset (P3), and, via clutch (18), carrier of second gearset (P2) and detachably couples, via clutch (78), ring gear of fourth gearset (P4). Ring gear of second gearset (P2) and carrier of first gearset (P2, P1) are connected to one another. Output shaft couples carrier and ring gear of the fourth and first gearsets (P4, P1) to one another. The sun gear of fourth gearset (P4) is coupled to the housing.

Abstract: The transmission with nine forward and one reverse gear includes four planetary gearsets, eight shafts and six shifting elements, the sun gear of gearset (P1) couples shaft (4) which can couple brake (04) to the housing. The input shaft can couple, via clutch (13), shaft (03) which is couples the carrier of gearset (P1) and the ring gear of gearset (P4) and can couple, via brake (03), the housing. The input shaft can couple, via clutch (16), shaft (6) which couples the ring gears of gearsets (P2, P3) and can couple, via clutch (17), shaft (7) which couples the sun gear of gearset (P2) and the ring gear of gearset (P1). Shaft (8) couples the carriers of gearsets (P2, P4). Shaft (5) couples the sun gears of gearsets (P3, P4) and can couple, via brake (05), the housing. The output shaft couples the carrier of gearset (P3).

Abstract: A multi-stage transmission with nine forward and one reverse gear includes four planetary gearsets, shafts and shifting elements. The sun gear of gearset (P1) couples shaft (5) which can coupled, via brake (05), the housing. The input shaft can couple, via clutch (14), shaft (4) which couples the carriers of gearsets (P1, P2) and can coupled, via brake (04), the housing. The input shaft can couple, via clutch (17), shaft (7) which couples the ring gear of gearset (P1) and the sun gear of gearset (P2) andcan couple, via clutch (18), shaft (8), which couples the carrier of gearset (P4) and the ring gear of gearset (P3). Shaft (6) couples the ring gears of gearsets (P2, P4). Shaft (3) couples the sun gears of gearsets (P3, P4) and can couple, via brake (03), the housing. The output shaft couples the carrier of gearset (P3).

Abstract: A transmission with nine forward and one reverse gear having four planetary gearsets, eight shafts and six shifting elements. The sun gears of gearsets (P1, P3) couple shaft (5), and can couple the housing by brake (05). Input shaft (1) can couple, via clutch (14), shaft (4), which couples carrier and sun gears of respective gearsets (P3, P2) and can couple housing via brake (04). Shaft (1) can couple, via clutch (17), shaft (7), which couples ring gear of gearset (P3) and can couple, via clutch (18), shaft (8) which couples ring gear and carrier of respective gearsets (P4, P2). Shaft (6) couples ring gear and carrier gear of respective gearsets (P2, P4). Shaft (3) couples sun gear of gearset (P4) and can couple, via brake (03), the housing. Output shaft (2) couples carrier and ring gear of respective gearsets (P4, P1).

Abstract: A multi-gear transmission having a housing, planetary gearsets, shafts and shifting elements. Input shaft (1) is connected or can couple the sun gear of gearset (RS3), and can couple the sun gear of gearset (RS1) and the carrier of gearset (RS1) and can couple the sun gear of gearset (RS2). Output shaft (2) is connected directly to the ring gear of gearset (RS4) and is connected or couple indirectly the carrier of gearset (RS3). The sun gear and the carrier of gearset (RS1) and the sun gear of gearset (RS4) can in each case couple the housing. The ring gear of gearset (RS1) is connected to the carrier of gearset (RS4) and is or can couple the ring gear of gearset (RS2), and the carrier of gearset (RS2) and the ring gear of the third planetary gearset (RS3) are or can be connected to one another.

Abstract: A multi-gear planetary transmission for a vehicle having four planetary gearsets (RS1, RS2, RS3, RS4), a plurality of shafts (I, II III, IV, V, VI, VII VIII, IX) and six shifting elements (A, B, C, D, E, F) which can be actuated to obtain a plurality of gears. At least the fourth planetary gearset (RS4) is a plus planetary gearset, the first shaft (I) is the drive input (An) which is connected to the planetary carrier (PT1) of the first planetary gearset (RS1) and to the third shifting element (C). The second shaft (II) is the drive output (Ab) which is connected at least to the ring gear (HO4) of the fourth planetary gearset (RS4). For each gear, at least four of the shifting elements (A, B, C, D, E, F) are engaged.

Abstract: A process and system are provided for determining fuel consumption of a motor vehicle. A first mean fuel consumption, which cannot be reset under a user's influence, is determined. A second mean fuel consumption, which can be reset under a user's influence, is determined as a function of several measured values. A third mean fuel consumption is determined as follows: (a) at the beginning of a predefined time period, which starts with a resetting of the second mean fuel consumption, the third mean fuel consumption is set to be equal to the first mean fuel consumption; (b) between the beginning and the end of the predefined time period, the third mean fuel consumption is set to be a weighted mean of the first mean fuel consumption and the second mean fuel consumption; and, (c) starting at an end of the predefined time period, the third mean fuel consumption is set to be equal to the second mean fuel consumption. A signal indicative of the third mean fuel consumption is provided.

Abstract: An arrangement for coupling at least two freewheels independent of an associated shaft of a gear mechanism comprises at least one shifting device that comprises an actuation device and a shifting device. The shifting device can be axially displaced with the actuation device that is arranged at least partially in the shaft.

Abstract: A double clutch winding transmission, having two sub-transmissions (T1, T2), coaxial transmission input shafts (1, 19), which are each coupled to a clutch (K1, K2), at least one counter shaft (2, 22) and a transmission output shaft (15) that is coaxially aligned with the transmission input shaft (1, 19). In at least one gear shift position, the flow of energy (L1 to L8) in the transmission winds through at least two meshing gear wheels (3 to 14), forming gear wheel levels (Z1 to Z6). The two sub-transmissions (T1, T2) are configured as two, consecutively positioned, single winding transmissions (W1, W2), each having at least four forward gear positions.

Abstract: A double clutch transmission with first and second clutches (K1, K2) with input sides connected with an input shaft (w_an) and output sides respectively connected with one of two coaxially arranged transmission output shafts (w_k1, w_k2). At least first and second countershafts (w_v1, w_v2) are provided on which are mounted idler gearwheels (8, 9, 10, 11, 12, 13, 14, 15), while on the two first and the second transmission input shafts (w_k1, w_k2) are mounted fixed gearwheels (1, 2, 3, 4, 5) whereby at least several power shiftable forward gears (1, 2, 3, 4, 5, 6, 7, 8) and at least one reverse gear (R1, R2, R3, R4) is shiftable. A maximum of six gear planes (8-12, 9-13, 10-14, 11-4, 5-15) are provided so that at least one winding path gear is shifted upon disengagement of a coupling device (S_ab2) allocated to an output gear (18).

Abstract: A double clutch transmission with two clutches connected to a drive shaft and to one of two transmission input shafts. Fixed gears are coupled to the input shafts and engage idler gears. Several coupling devices connect the idler gears to either first or second countershafts which each have an output gear that couple gears of an output shaft such that forward and reverse gears can be shifted. A shifting device couples gears to engage power shift forward and reverse gears. Two dual gear planes each comprising one fixed gear and two idler gears which are supported by a respective countershaft. In each dual gear plane, at least one idler gear wheel can be used for at least two gears. Two single gear planes each comprise an idler and fixed gear such that at least one power shift winding-gear is engaged by a shifting device.

Abstract: A double clutch transmission with two clutches (K1, K2) having input sides connected to a drive shaft (w_an) and output side connected to one of two coaxially arranged transmission input shafts (w_k1, w_k2). At least two countershafts (w_v1, w_v2) are provided on which toothed idler gearwheels (7, 8, 9, 10, 13, 14, 15) are situated in a rotatable manner. Toothed idler gearwheels (1, 2, 3, 4) are provided in a rotationally fixed manner on the two transmission input shafts (w_k1, w_k2). At least a plurality of forward gears which are power shiftable (1, 2, 3, 4, 5, 6, 7, 8) and at least one reverse gear (R1, R2, R3, R4, R5, R6, R7, R8) are shiftable. A maximum of five gear planes (7-13, 8-14, 9-15, 10-4) are provided so that at least one power shiftable winding path gear (G1, G8, R4) is shiftable by at least one shift element (P).

Abstract: A double clutch transmission with two clutches connected to a drive shaft and to one of two transmission input shafts. Fixed gears are coupled to the input shafts and engage idler gears. Several coupling devices connect the idler gears to a respective countershaft which have an output gear that couple gears of an output shaft such that forward and reverse gears can be shifted. Three dual gear planes each comprise two idler gears, each supported by a respective countershaft, and one fixed gear. In each dual gear plane, at least one idler gear wheel can be used for implementing at least two gears so that at least one winding-path gear can be shifted via a shifting device.