Zf Friedrichshafen Ag

Zg Friedrichshafen Ag

Michael Kamm

Gabor Diosi

Peter Ziemer

Gerhard Gumpoltsberger

Josef Haupt

Martin Brehmer

The 8-speed transmission which comprises an input shaft (AN), an output shaft (AB), four planetary gearsets (RS, RS, RS, RS), eight rotary shafts (), 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.

Multi-speed transmission

A vehicle multi-speed automatic transmission which comprises an input shaft (AN) and an output shaft (AB); first, second, third and fourth planetary gear sets (RS, RS, RS, RS); at least third, fourth, fifth, sixth, seventh and eighth rotatable shafts (); and first, second, third, fourth and fifth shifting elements (A, B, C, D, E) whose selective engagement, in combinations of three engaged shifting elements, defines different gear ratios, between the input shaft (AN) and the output shaft (AB), for implementing eight forward gears and at least one reverse gear. When shifting from one forward gear into a successive higher or lower forward gear, only a single one of the first, the second, the third, the fourth and the fifth shift elements is disengaged and only a single one of the first, the second, the third, the fourth and the fifth shift elements is engaged.

A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprises an input shaft and an output shaft; first, second, third and fourth planetary gear sets; and at least third, fourth, fifth, sixth, seventh and eighth rotatable shafts and first and second brakes and first, second and third clutches whose selective engagement defines different gear ratios between the input shaft and the output shaft such that at least eight forward gears and at least one reverse gear can be implemented. When shifting from one forward gear into one of a successive higher and a successive lower forward gear, only a single one of the first and second brakes and the first, second and third clutches is disengaged and only a single one of the first and second brakes and the first, second and third clutches is engaged.

A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprises an input shaft (AN) and an output shaft (AB); first, second, third and fourth planetary gear sets (RS, RS, RS, RS); and at least third, fourth, fifth, sixth, seventh and eighth rotatable shafts () and first, second, third, fourth and fifth shifting elements (A, B, C, D, E) whose selective engagement defines different gear ratios between the input shaft (AN) and the output shaft (AB) such that eight forward gears and at least one reverse gear can be implemented. When shifting from one forward gear into one of a successive higher and a successive lower forward gear, only a single one of the first, the second, the third, the fourth and the fifth shift elements is disengaged and only a single one of the first, the second, the third, the fourth and the fifth shift elements is engaged.

The transmission includes input and output shafts, gearsets (RS, RS, RS, RS), shafts (), and elements (A, B, C, D, E). A carrier of gearset (RS) couples the input shaft forming shaft (). A carrier of gearset (RS) couples the output shaft forming shaft (). Sun gears of gearsets (RS, RS) couple forming shaft (). Ring gears of gearsets (RS, RS) respectively form shafts (). A carrier and sun gear respectively of gearsets (RS, RS) couple forming shaft (). A carrier and ring gear respectively of gearsets (RS, RS) couple forming shaft (). Sun and ring gears respectively of gearsets (RS, RS) couple forming shaft (). In the power flow, elements (A, B) are respectively between () and a housing, element (C) between (), element (D) between either () or (), shifting element (E) between two of ().

A transmission having input and output shafts, gearsets (RS-RS), shafts (-) and elements (A-E). Carriers of gearsets (RS, RS) are respectively connected to the input and the output forming shafts (). Sun gears of gearsets (RS, RS) are coupled forming shaft (). The ring gear and a carrier respectively of gearsets (RS, RS) form shafts (). Ring gears of gearsets (RS, RS) respectively couple sun gears of gearsets (RS, RS) forming shafts (). A carrier of gearset (RS) and a ring gear of gearset (RS) are connected forming shaft (). In the power flow, elements (A, B) are respectively arranged between shafts () and a transmission housing, element (C) between shafts (), element (D) between shafts () or (), and element (E) between two of shafts ().

A transmission having input and output shafts, planetary gearsets (RS, RS, RS, RS), and additional shafts and shifting elements. A ring gear of set (RS) and the input shaft define shaft (). A carrier of (RS) and the output define shaft (). The sun gears of (RS, RS) define shaft (). A ring gear of (RS) forms shaft (). A ring gear of (RS) and a sun gear of (RS) define shaft (). A carrier of (RS) and a ring gear of (RS) form shaft (). A sun gear of (RS) and a carrier of (RS) define shaft (). A carrier of (RS) forms shaft (). A first element (A) couples shaft () to the transmission housing. A second element (B) couples shaft () to the housing. A third element (C) couples shafts () to one another. A fourth element (D) couples shafts () or () to one another. A fifth element (E) couples shafts (), () or () to one another.

A multi-speed transmission has input and output shafts, gearsets (RS, RS, RS, RS), shafts (), and shifting elements (A, B, C, D, E). A carrier of gearset (RS) and the input shaft couple as shaft (). A carrier of gearset (RS) and the output shaft couple as shaft (). Sun gears of gearsets (RS, RS) couple as shaft (). Ring gears of coupled gearsets (RS, RS) respectively form shafts (). Sun gears of gearsets (RS, RS) couple as shaft (). A carrier of gearset (RS) and a ring gear of gearset (RS) couple as shaft (). A carrier of gearset (RS) and a ring gear of gearset (RS) couple as shaft (). Arranged within the power flow: elements (A, B) are respectively between shaft () and a transmission housing; element (C) between shafts (); element (D) between either shafts () or (); element (E) between two of shafts ().

The 8-gear transmission comprising an input shaft (AN), an output shaft (AB), four planetary gearsets (RS, RS, RS, RS), eight rotary shafts () and five shifting elements (A, B C, E, E). The first shifting element (A) is arranged within the power flow between the third shaft () and a housing (GG) of the transmission, the second shifting element(B) is arranged within the power flow between the fourth shaft () and the housing (GG), the third shifting element (C) is arranged within the power flow between the first and the fifth shafts (), the fourth shifting element (D) is arranged within the power flow between the fifth and the eighth shafts (), and the fifth shifting element (E) is arranged within the power flow between the fifth and the seventh shafts ().

A transmission with planetary gearsets (RSRSRSRS), shafts and shifting elements (A, B, C, D, E). A carrier of gearset (RS) and the input forming shaft (). A carrier of gearset (RS) and the output forming shaft (). Sun gears of gearsets (RS, RS) couple and forming shaft (). Ring gears of gearsets (RS, RS) respectively form shafts (). Sun gears of gearsets (RSRS) forming shaft (). A carrier and a ring gear of respective gearsets (RSRS) forming shaft (). A ring gear and a carrier of respective gearsets (RSRS) forming shaft (). In the direction of power flow, element (A) is located between shaft () and a housing, element (B) between shaft () and the housing, element (C) between two of shafts (), element (D) between shafts (), and element (E) between shafts ().

The ring gear of the second gearset (RS) and the input shaft couple to form a first shaft (). The carrier of third gearset (RS) and the output shaft form a second shaft (). The sun gears of first and fourth gearsets (RS, RS) form a third shaft (). The carrier of first gearset (RS) forms a fourth shaft (). Sun gears of second and third gearsets (RS, RS) form a fifth shaft (). Ring gears of first and third gearsets (RS, RS) form a six shaft (). The carriers of second and fourth gearsets (RS, RS) form a seventh shaft (). A ring gear of fourth gearset (RS) forms an eighth shaft (). In the direction of power flow, First and second shifting elements (A), (B) are located between shafts () and a transmission housing, third shifting element (C) is between two of shafts (), fourth and fifth shifting elements (D), (E) are between shafts (), ().

The multi-speed transmission has rotatable shafts, planetary gearsets (RS, RS, RS, RS) and shifting elements (A, B, C, D, E). Carrier (ST) of gearset (RS) and the input shaft couple as shaft (). Carriers (ST, ST) of respective gearsets (RS, RS) and the output shaft (AB) couple as shaft (). Sun gears (SO, SO) of gearsets (RS, RS) couple as shaft (). Carrier (ST) of gearset (RS) forms shaft (). Sun gear (SO) forms shaft (). Ring gears (HO, HO) of gearsets (RS, RS) couple as shaft (). Sun and ring gears (SO, HO) respectively of gearsets (RS, RS) couple as shaft (). Carrier (ST) is shaft (). In the flow of power, elements (A, B) are respectively between shafts () and a transmission housing; element (C) is between shafts (); element (D) is between shafts (); and element (E) is between shafts ().

An eight gear transmission having drive and output shafts, planetary gearsets, shafts and shifting elements. One carrier of the gearset (RS) and the drive shaft are coupled to form shaft (). One ring gear of the gearset (RS), one carrier of the gearset (RS) and the output shaft are coupled to form shaft (). One sun gear of the gearset (RS) and one sun gear of the gearset (RS) are coupled to form shaft (). One carrier of the gearset (RS) forms shaft (). One sun gear of the gearset (RS) forms the fifth shaft. One ring gear of the gearset (RS) and one carrier of the gearset (RS) and one ring gear of the gearset (RS) are coupled to form shaft (). One ring gear of the gearset (RS) forms the seventh shaft. One sun gear of the gearset (RS) forms shaft ().

A multi-speed transmission which has shafts, planetary gearsets (RS, RS, RS, RS) and shifting elements (A, B, C, D, E). Carrier (ST) of gearset (RS) and the input shaft couple as shaft (). Carrier (ST) of gearset (RS) and the output shaft couple as shaft (). Sun gears (SO, SO) of gearsets (RS, RS) couple as shaft (). Carrier (ST) of gearset (RS) forms shaft (). Sun gear (SO) forms shaft (). Ring gears (HO, HO) of gearsets (RS, RS) and carrier (ST) of gearset (RS) couple as shaft (). Sun and ring gears (SO, HO) respectively of gearsets (RS, RS) couple as shaft (). Ring gear (HO) is shaft (). In the flow of power, elements (A, B) are respectively between shafts () and a transmission housing; element (C) is between shafts (); element (D) is between shafts (); and element (E) is between shafts ().

The multi-speed transmission having rotatable shafts, planetary gearsets (RS, RS, RS, RS) and shifting elements (A, B, C, D, E). Carrier (ST) of gearset (RS) and the input shaft couple as shaft (). Carriers (ST, ST) of respective gearsets (RS, RS) and the output shaft (AB) couple as shaft (). Sun gears (SO, SO) of gearsets (RS, RS) couple as shaft (). Carrier (ST) of gearset (RS) forms shaft (). Sun gear (SO) forms shaft (). Ring gears (HO, HO) of gearsets (RS, RS) couple as shaft (). Sun and ring gears (SO, HO) respectively of gearsets (RS, RS) couple as shaft (). Ring gear (HO) is shaft (). In the flow of power, elements (A, B) are respectively between shafts () and a transmission housing; element &#xa9; is between shafts (); element (D) is between shafts (); and element (E) is between shafts ().

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Bodnegg, Germany

Michael Kamm