Abstract:
A transmission (1) having a plurality of frictionally engaging shift elements (A to C) which are engaged or disengaged in order to obtain various gear ratios. The permissible surface pressure in the area of friction surfaces of connecting elements (B, C) that can be brought into mutual frictional engagement, which are engaged during upshifts to produce a gear ratio, is lower than the permissible surface pressure in the area of friction surfaces of disconnecting elements (A) that can be brought into mutual frictional engagement which, in each case, are only disengaged during upshifts to produce gear ratios.
Abstract:
An arrangement of a planetary gearset (2) with an axially adjacent shift element in a housing (1) of a transmission of a vehicle. The planetary gearset (2) is connected to the shift element in a detachable manner.
Abstract:
The 8-gear transmission comprises an input shaft (AN), an output shaft (AB), four planetary gearsets (RS1, RS2, RS3, RS4), eight rotary shafts (1, 2, 3, 4, 5, 6, 7, 8), and five shifting elements (A, B, C, D, E). A carrier (ST4) of the fourth gearset (RS4) and the input shaft (AN) are connected to each other as the first shaft (1). A carrier (ST4) of the fourth gearset (RS4) and the input shaft (AN) are connected to each other as the first shaft (1). A carrier (ST3) of the third gearset (RS3) and the output shaft (AB) are connected to each other as the second shaft (2). A sun gear (SO1) of the first gearset (RS1) and a sun gear (SO4) of the fourth gearset (RS4) are permanently connected to each other as the third shaft (3). A ring gear (HO1) of the first gearset (RS1) forms the fourth shaft (4). A carrier (ST2) of the second gearset (RS2) and a sun gear (SO3) of the third gearset (RS3) are connected to each other as the fifth shaft (5). A carrier (ST1) of the first gearset (RS1) and a ring gear (HO3) of the third gearset (RS3) are connected as the sixth shaft (6). A sun gear (SO2) of the second gearset (RS2) and a ring gear (HO4) of the fourth gearset (RS4) are connected to each other as the seventh gear (7). A ring gear (HO2) of the second gearset (RS2) forms the eighth shaft (8). Within the power flow, the first shifting element (A) is arranged between the third shaft (3) and a housing (GG) of the transmission, the second shifting element (B) is arranged between the fourth shaft (4) and the housing (GG), the third shifting element (C) is arranged between the first and fifth shafts (1, 5), the fourth shifting element (D) is arranged either between the second and eighth shafts (2, 8) or between the sixth and eighth shafts (6, 8), the fifth shifting element (E) is arranged either between the fifth and seventh shafts (5, 7), or between the fifth and eighth shafts (5, 8), or between the seventh and eighth shafts (7, 8).
Abstract:
A multi step transmission comprising planetary gearsets (P1, P2, P3, P4), shafts and shift elements. The sun gear of set (P1) couples the drive shaft. The carrier of set (P1) couples housing (G), via shaft (3) and brake (03), the drive shaft via clutch (13), and shaft (5) via clutch (35). Shaft (5) couples the ring and sun gears of sets (P2, P4) respectively and, via clutch (58), couples shaft (8) which couples the sun gear of set (P3). The drive shaft couples the carrier of set (P4). Shaft (6) couples the ring gear of set (P1) and carrier of set (P2). The sun gear of set (P2) couples housing (G) via shaft (4) and brake (04). The ring gear of set (P3) couples housing (G). Output shaft couples the carrier of set (P3) and, via clutch (27), shaft (7) which couples the ring gear of set (P4).
Abstract:
A multi step transmission comprising planetary gearsets (P1, P2, P3, P4), shafts and shift elements. The sun gear of gearset (P1) couples shaft (4) which couples housing (G) via brake (04). The carrier of gearset (P1) couples shaft (3) which couples housing (G) via brake (03), drive shaft (1) via clutch (13), and shaft (5) via clutch (35). Shaft (5) couples the ring gear of gearset (P2) and, via clutch (58), shaft (8) which couples the sun gear of gearset (P4). Shaft (1) couples the sun gear of gearset (P2) and operatively couples the carrier of gearset (P3). Shaft (6) couples the ring gear of gearset (P1) and the carrier of gearset (P2), and operatively couples the sun gear of gearset (P3). The ring gear of set (P4) couples a housing (G) and drive shaft (2) couples the ring gear and the carrier of gearsets (P3, P4) respectively.
Abstract:
A multi step transmission comprises planetary gearsets (P1, P2, P3, P4), shafts, and shift elements. The sun gear of gearset (P1) couples shaft (4) which couples housing (G) via brake (04), the carrier of gearset (P1) couples shaft (3) which couples housing (G) via brake (03), the drive shaft via clutch (13), and shaft (5) via clutch (35). Shaft (5) couples the ring gear of gearset (P2) and the sun gear of gearset (P4). Shaft (1) couples the sun gear of gearset (P2) and operatively couples the carrier of gearset (P3). Shaft (6) couples the ring gear and carrier of gearsets (P1, P2) respectively, and operatively couples the sun gear of gearset (P3). The ring gear of gearset (P4) couples housing (G) and output shaft (2) couples the ring gear of gearset (P3), and detachably couples, via clutch (28), shaft (8) which couples the carrier of gearset (P4).
Abstract:
A transmission having input and output shafts, gearsets (RS1-RS4), shafts (1-8) and elements (A-E). Carriers of gearsets (RS4, RS3) are respectively connected to the input and the output forming shafts (1, 2). Sun gears of gearsets (RS1, RS4) are coupled forming shaft (3). The ring gear and a carrier respectively of gearsets (RS1, RS2) form shafts (4, 8). Ring gears of gearsets (RS2, RS4) respectively couple sun gears of gearsets (RS3, RS2) forming shafts (5, 7). A carrier of gearset (RS1) and a ring gear of gearset (RS3) are connected forming shaft (6). In the power flow, elements (A, B) are respectively arranged between shafts (3, 4) and a transmission housing, element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6), and element (E) between two of shafts (5, 7, 8).
Abstract:
A transmission having gearsets (RS1-RS4), shafts (1-8) and shifting elements (A-E). A carrier of gearset (RS4) and an input shaft forming shaft (1), a carrier of gearset (RS3) and an output shaft form shaft (2), sun gears of gearsets (RS3, RS4) form shaft (3). A ring gear of gearset (RS1) forms shaft (4). Ring and sun gears respectively of gearsets (RS2, RS1) couple as shaft (5), a carrier of gearset (RS1) and a ring gear of gearset (RS3) form shaft (6), sun and ring gears respectively of gearsets (RS2, RS4) couple as shaft (7). A carrier of gearset (RS2) forms shaft (8). Located in the flow of power: elements (A, B) are respectively between shafts (3, 4) and a housing, element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6) and element (E) between two of shafts (5, 7, 8).
Abstract:
A vehicle transmission having shifting elements (A-E) and a parking brake for locking a drive train output and a method for controlling the transmission. Activation of the parking brake depends on a driver's control action. Deactivating the parking brake, when the vehicle is on a slope greater or lesser than a preset value and depending on the slope, a combination of shifting elements (A, D) or (B, D) frictionally slip, such that the output rotates against the strain on a parking brake locking element, caused by the slope, to partially eliminate this strain. Next, one of shifting elements (C, A or B) engages locking the output. The parking brake is then released and finally, the engaged shifting element (C or A or B) is disengaged in a regulated manner, such that the output can be driven according to the driver's control action.
Abstract:
The present invention relates to an automatic transmission (1) comprising at least one planetary stage (2) and at least one gear shifting element (3), wherein this gear shifting element (3) is disposed axially directly adjacent to the planetary stage (2), wherein a piston-cylinder arrangement (4) is provided for actuating the gear shifting element (3), wherein the planetary stage (2) comprises an internal gear (5), a sun gear (6) and a planet carrier (7), on which planet gears (8) are rotatably mounted, wherein the planet carrier (7) is connected non-rotatably to a transmission shaft (9), and wherein the pressure medium can be fed to the pressure chamber (10) of the cylinder (11) of the piston-cylinder arrangement (4) through a bore (12, 13) in the transmission shaft (9) and in the planet carrier (7).