Abstract: A transmission (G) is provided having four planetary gear sets (P1, P2, P3, P4), several shafts (W1-W8) and a first, second, third, fourth and fifth shift element (B1, B2, K1, K2, K3), the selective meshing of which brings about different transmission ratio relationships between a transmission input shaft (GW1) and a transmission output shaft (GW2). The transmission (G) includes a sixth shift element (K4), through which the fifth shaft (W5) is connectable to the sun gear (So-P4) of the fourth planetary gear set (P4).

Abstract: A transmission (G) is provided with four planetary gear sets (P1, P2, P3, P4), several shafts (W1-W8) and a first, second, third, fourth and fifth shift element (B1, B2, K1, K2, K3), the selective meshing of which brings about different transmission ratio relationships between a transmission input shaft (GW1) and a transmission output shaft (GW2). The second shift element (B2) and/or the fifth shift element (K3) is arranged, in a series at a sixth shift element (K4), in the power flow between the fifth shaft (W5) and a sun gear (So-P4) of the fourth planetary gear set (P4).

Abstract: A transmission (G) is provided with four planetary gear sets (P1, P2, P3, P4), several shafts (W1-W7) and a first, second, third, fourth and fifth shift element (B1, B2, K1, K2, K3), the selective meshing of which brings about different transmission ratio relationships between a transmission input shaft (GW1) and a transmission output shaft (GW2). The transmission (G) includes a sixth shift element (K4), through which the fifth shaft (W5) is connectable to the sun gear (So-P4) of the fourth planetary gear set (P4), either directly or through the second shift element (B2), and whereas the fourth shaft (W4) is connectable through the fourth shift element (K2) with the sun gear (So-P4) of the fourth planetary gear set (P4), either directly or through the second shift element (B2).

Abstract: A method for actuating a shift element of an automatic transmission having a start-stop function and a pressure medium pump driven by an internal combustion engine. The shifting elements are clutches or brakes that can be actuated by a piston which is actuated for engagement via pressure supplied to a pressure space. The pressure space is depressurized when the engine stops. To enhance start-stop operation, the shifting elements comprise an additional pressure space that acts, in opposition to the pressure space acting in the engaging direction, as a controllable restoring mechanism which can be rendered inactive, if desired. If the engine stops and the automatic start-stop function is activated, the additional pressure spaces, acting in the restoring direction, are depressurized before the pressure drop in the pressure spaces, acting in the engaging direction, of the pistons, but are otherwise permanently pressurized during driving operation.

Abstract: The invention relates to an automatic transmission with nine rotatable shafts (1 to 9) and four planetary gear sets (RS1 to RS4), each with a first, second and third element. For the shifting of multiple forward gears and one reverse gear, seven shift elements (A to G) are provided. The second element (ST4) of the fourth planetary gear set (RS4) forms the first shaft (1) designed as a drive shaft (AN) the second element (ST3) of the third planetary gear set (RS3) forms the second shaft (2) designed as an output shaft (AB), the first element (SO4) of the fourth planetary gear set (RS4) forms the third shaft (3), one element of the planetary gear set (RS1) forms the fourth shaft (4), the third element (HO3) of the third planetary gear set (RS3) forms the sixth shaft (6), the second element (ST2) of the second planetary gear set (RS2) forms the eighth shaft (8).

Abstract: A valve device (14) of a hydraulic system (1) for actuating at least one shifting element (2) of a transmission. The valve device comprising a pilot-controlled control valve device (3) with a valve slide (9) and, functionally connected with this is, an also pilot-controlled switching valve device (4) which is also formed with a valve slide (7). The valve slides (7, 9) are arranged to move longitudinally in a common bore (15) of a valve housing (16) and are positioned coaxially with one another, and an inner valve slide (7) is arranged to move longitudinally at least partially within the outer valve slide (9).

Abstract: A device for storing fluid, of a transmission hydraulic system, having at least one storage chamber that is defined by a housing and a delimiting device, which can be connected with the hydraulic system. The volume of the chamber depends on operation of the delimiting device and/or the housing. The delimiting device and/or housing can be set such that the storage chamber has a defined volume, in opposition to a restoring effort of the housing and/or delimiting device, starting from an operating condition which differs from the operating condition equivalent to the minimum volume of the storage chamber toward their operating condition equivalent to the minimum storage chamber volume. When the holding device is actuated, the operating conditions of the delimiting device and/or the housing assembly vary between operating conditions in which the storage chamber volume is either a maximum or corresponds to the defined storage chamber volume.

Abstract: A method for actuating a shift element of an automatic transmission having a start-stop function and a pressure medium pump driven by an internal combustion engine. The shifting elements are clutches or brakes that can be actuated by a piston which is actuated for engagement via pressure supplied to a pressure space. The pressure space is depressurized when the engine stops. To enhance start-stop operation, the shifting elements comprise an additional pressure space that acts, in opposition to the pressure space acting in the engaging direction, as a controllable restoring mechanism which can be rendered inactive, if desired. If the engine stops and the automatic start-stop function is activated, the additional pressure spaces, acting in the restoring direction, are depressurized before the pressure drop in the pressure spaces, acting in the engaging direction, of the pistons, but are otherwise permanently pressurized during driving operation.

Abstract: An arrangement for supplying oil to a chain drive which drives a transmission oil pump that is axially offset relative to a torque converter and embedded in an intermediate plate in a vehicle having a torque converter. The driven sprocket of the chain drive is supported by a converter neck mounted in a centering plate. A seal is provided between the converter neck and the sprocket and is arranged adjacent the sliding fit between the converter neck and the sprocket. To compensate for the suppression of lubrication of the seal, the neck bearing and the chain drive, a valve is integrated in the intermediate plate, and a duct is provided in the plane, in which the centering plate is screwed to the intermediate plate, such that excess oil flowing from the valve is selectively directed to the seal, the neck bearing and the chain drive.

Abstract: A transmission with nine forward and one reverse gear comprises planetary gearsets, shafts and shift elements. A sun gear of a first gearset (P1) is connectable to a housing via a first brake (03) and couples the sun gear of the second gearset (P2). A carrier of the first gearset (P1) couples the ring gear of the fourth gearset (P4). A ring gear of first gearset (P1) is connectable to the housing by a second brake (04). The carrier of the second gearset (P2) couples the input which is connectable by clutch (15) to the fifth shaft (5). The fifth shaft (5) respectively couples the sun and ring gears of the fourth and third gearsets (P4, P3) and is connectable to a seventh shaft (7) by clutch (57). The seventh shaft (7) respectively couples the sun and ring gears of the third and the second gearsets (P3, P2).

Abstract: The multi-ratio transmission with forward and reverse gears, gearsets (P1, P2, P3, P4), shafts and shifting elements. A sun gear of the gearset (P1) directly couples an input shaft, which couples, via clutch (14), shaft (4) and, via clutch (17), shaft (7). Shaft (4) couples the carrier of gearset (P2) and the ring gear of gearset (P3) and couples, via brake (04), a housing. Shaft (7) couples the sun gear of gearset (P4) and, via clutch (78), shaft (8), which couples the sun gears of gearsets (P3, P2). Shaft (3) couples the carrier of gearset (P1) and the ring gear of gearset (P2) and, via brake (03), the housing. Shaft (5) couples the ring gear of gearset (P1) and, via brake (05), the housing. Shaft (6) couples the carrier of gearset (P3) and the ring gear of gearset (P4). The output shaft couples the carrier of gearset (P4).

Abstract: The invention concerns an automatic transmission of planetary structure, comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4) and six shifting element (A, B, C, D, E, F). By the selective engagement of three of a total of six shifting elements (A to F), ten forward gears and up to two reverse gears can be engaged without range shifts.

Abstract: A transmission comprising four gear sets (P1, P2, P3, P4), eight shafts and six shift elements. The drive shaft is connected with sun gear of set (P1) and carrier of set (P4). Carrier of set (P1) is connected to shaft (3) which is connectable to a housing, via a first brake, and connectable to shaft (5), via clutch (35). Shaft (5) interconnects the ring gear of set (P2) with the sun gears of sets (P3, P4). Shaft (6) interconnects ring gear of set (P1) with carrier of set (P2). Shaft (4) couples sun gear of set (P2) to the housing, via a brake. Ring gear of set (P3) is connected to the housing. The output shaft is connectable, via clutch (27), with shaft (7) which is connected to ring gear of set (P4) and, via clutch (28), with shaft (8) which is connected to carrier of set (P3).

Abstract: A multi step transmission comprising planetary gearsets (P1, P2, P3, P4), shafts and shift elements. The sun gear of gearset (P1) couples drive shaft (1). The carrier of set (P1) couples shaft (3), which couples housing (G) via brake (03), shaft (1) via clutch (13) and shaft (6) via clutch (36). Shaft (6) couples the ring and sun gear of gearsets (P2 P3) respectively, and, via clutch (68), shaft (8), which couples the carrier of gearset (P4). Shaft (1) couples the carrier of gearset (P4). Shaft (7) couples the ring gear of gearset (P1) and the carrier of set (P2). The sun gear of gearset (P4) couples shaft (4), which couples housing (G) via brake (04). The ring gear of gearset (P3) couples shaft (5), which couples housing (G) via brake (05). Output shaft (2) couples the carrier of gearset (P3) and the ring gear of gearset (P4).

Abstract: The invention concerns an automatic transmission of planetary structure, comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4) and six shifting element (A, B, C, D, E, F). By the selective engagement of three of a total of six shifting elements (A to F), ten forward gears and up to two reverse gears can be engaged without range shifts.

Abstract: The invention concerns an automatic transmission of planetary structure, comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4) and six shifting element (A, B, C, D, E, F). By the selective engagement of three of a total of six shifting elements (A to F), ten forward gears and up to two reverse gears can be engaged without range shifts.

Abstract: A rotationally fixed connection of first and second components (2, 4) of a transmission (1) for torque transfer. The fixed connection is produced by the combination of two different types of connection elements (6, 7, 8, 9), such that the connection elements (6, 8) of a first type ensures the mutual centering of the first and the second components (2, 4) to be connected and torque transfer, while the connection elements (7, 9) of a second type enable the first and the second components (2, 4) to be axially fixed and transfer axial operating forces.

Abstract: The invention concerns an automatic transmission of planetary structure, comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4) and six shifting element (A, B, C, D, E, F). By the selective engagement of three of a total of six shifting elements (A to F), ten forward gears and up to two reverse gears can be engaged without range shifts.

Abstract: A multi step transmission comprising four planetary gear sets, 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), and drive shaft (1) via clutch (13), and shaft (6) via clutch (36). Shaft (6) couples the ring gear of gearset (P2) and is operatively connected to the sun gear of gearset (P4). Shaft (1) couples the sun gear of gearset (P2) and the carrier of gearset (P3). Shaft (5) couples the ring gear of gearset (P1), the carrier of gearset (P2), and the sun gear of gearset (P3). The ring gear of gearset (P4) couples housing (G). Output shaft (2) detachably couples shaft (7), which couples the ring gear of gearset (P3), via clutch (27), and operatively couples the carrier of gearset (P4).

Abstract: The 8-speed transmission which 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). The input shaft is directly connected to the fourth planetary gear set while the output shaft is directly connected to the third planetary gear. A third shaft directly connects one element of the first planetary gear set with one element of the fourth planetary gear set. A fifth shaft directly connects one element of the second planetary gear set with one element of the third planetary gear set. A sixth shaft directly connects one element of the first planetary gear set with one element of the third planetary gear set. A seventh shaft directly connects one element of the fourth planetary gear set with one element of the fifth shifting element.