MULTI-RATIO TRANSMISSION

• US 20150018157A1
• Filed: 01/10/2013
• Published: 01/15/2015
• Est. Priority Date: 02/24/2012
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Beck, Stefan, Sibla, Christian, Rieger, Wolfgang
• Granted Patent: US 9,285,016 B2
• Time in Patent Office: Days
• US Class Current: 475/275
• CPC Class Codes: F16H 2200/0065 the gear ratios comprising nine forward speeds
• CPC Class Codes: F16H 2200/2012 with four sets of orbital gears
• CPC Class Codes: F16H 2200/2046 with six engaging means
• CPC Class Codes: F16H 3/62 Gearings having three or more central gears F16H3/68 - F16H3/78 take precedence
• CPC Class Codes: F16H 3/66 composed of a number of gear trains without drive passing from one train to another

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).

Claims

1-8. -8. (canceled)

9. An automatic multi-stage transmission of a planetary design for a motor vehicle, the multi-stage transmission comprising:

a drive input shaft (1) and a drive output shaft (2);

first, second, third and fourth planetary gearsets (P1, P2, P3, P4) being arranged within a housing (G), and each of the first planetary gearset (P1), the second planetary gearset (P2), the third planetary gearset (P3) and the fourth planetary gearset (P4) comprises a sun gear, a ring gear and a carrier;

third, fourth, fifth, sixth, seventh and eighth rotating shafts (3, 4, 5, 6, 7, 8);

six shifting elements (03, 04, 05, 14, 17, 18) comprising first, second and third brakes (03, 04, 05) and first, second and third clutches (14, 17, 18), and selective engagement of the first, the second and the third brakes and the first, the second and the third clutches producing various transmission ratios between the drive input shaft (1) and the drive output shaft (2) such that nine forward gears and one reverse gear can be implemented;

the sun gear of the first planetary gearset (P1) being connected to the fifth shaft (5), which is connected to the sun gear of the third planetary gearset (P3) and being connectable to the housing (G) by the third brake (05);

the drive input shaft (1) being detachably connectable, by the first clutch (14), to the fourth shaft (4), the fourth shaft (4) being connected to the carrier of the third planetary gearset (P3) and to the sun gear of the second planetary gearset (P2), and the fourth shaft (4) being connectable to the housing (G) by the second brake (04);

the drive input shaft (1) being detachably connectable, by the second clutch (17), to the seventh shaft (7), the seventh shaft (7) being connected to the ring gear of the third planetary gearset (P3), and the drive input shaft (1) being detachably connectable, by the third clutch (18), to the eighth shaft (8) being connected to the ring gear of the fourth planetary gearset (P4) and the carrier of the second planetary gearset (P2);

the sixth shaft (6) being connected to the ring gear of the second planetary gearset (P2) and the carrier of the fourth planetary gearset (P4) and the third shaft (3) being connected to the sun gear of the fourth planetary gearset (P4) and being connectable, by the first brake (03), to the housing (0); and

the drive output shaft (2) being connected to the carrier of the fourth planetary gearset (P4) and to the ring gear of the first planetary gearset (P1).

10. The multi-stage transmission according to claim 9, wherein the first, the second, the third and the fourth planetary gearsets (P1, P2, P3, P4) are designed as minus planetary gearsets.

11. The multi-stage transmission according to claim 9, wherein the first, the second, the third and the fourth planetary gearsets (P1, P2, P3, P4), when viewed axially, are arranged in a sequential order of the first planetary gearset (P1), the second planetary gearset (P2), the third planetary gearset (P3) and the fourth planetary gearset (P4).

12. The multi-stage transmission according to claim 9, wherein the first, the second and the third clutches (14, 17, 18), when viewed axially, are arranged adjacent to one another and as disk shifting elements which have a common outer disk carrier.

13. The multi-stage transmission according to claim 9, wherein the six shifting elements (03, 04, 05, 14, 17, 18) of the multi-stage transmission are designed as shifting elements that are independently, selectively actuatable.

14. The multi-stage transmission according to claim 9, wherein the first brake (03) is an interlocking shifting element.

15. The multi-stage transmission according to claim 9, wherein a first forward gear is implemented by engagement of the first and the third brakes (03, 05) and the second clutch (17),

a second forward gear is implemented by engagement of the first and the third brakes (03, 05) and the first clutch (14),

a third forward gear is implemented by engagement of the first brake (03) and the first and the second clutches (14, 17),

a fourth forward gear is implemented by engagement of the first brake (03), the third clutch (18) and one of the first clutch (14), the second clutch (17), the second brake (04) and the third brake (05),

a fifth forward gear is implemented by engagement of the first, the second and the third clutches (14, 17, 18),

a sixth forward gear is implemented by engagement of the third brake (05) and the first and the third clutches (14, 18),

a seventh forward gear is implemented by engagement of the third brake (05) and the second and the third clutches (17, 18),

an eighth forward gear is implemented by engagement of the second and the third brakes (04, 05) and the third clutch (18),

a ninth forward gear is implemented by engagement of the second brake (04) and the second and the third clutches (17, 18), and

the reverse gear is implemented by engagement of the first and the second brakes (03, 04) and the second clutch (17).

16. The multi-stage transmission according to claim 15, wherein the fourth forward gear is implemented by engagement of the first brake (03) and the first and the third clutches (14, 18).

17. The multi-stage transmission according to claim 15, wherein the fourth forward gear is implemented by engagement of the first and the third brakes (03, 05) and the third clutch (18).

18. The multi-stage transmission according to claim 15, wherein the fourth forward gear is implemented by engagement of the first and the second brakes (03, 04) and the third clutch (18).

19. The multi-stage transmission according to claim 15, wherein the fourth forward gear is implemented by engagement of the first brake (03) and the second and the third clutches (17, 18).

20. A multi-stage automatic transmission of planetary design for a motor vehicle, the transmission comprises

a drive input shaft (1) and a drive output shaft (2);

first, second, third and fourth planetary gearsets (P1 P2, P3, P4) being arranged within a housing (G), each of the first planetary gearset (P1), the second planetary gearset (P2), the third planetary gearset (P3) and the fourth planetary gearset (P4) comprises a sun gear, a ring gear and a carrier;

third, fourth, fifth, sixth, seventh and eighth rotating shafts (3, 4, 5, 6, 7, 8);

first, second and third brakes (03, 04, 05) and first, second and third clutches (14, 17, 18), selective engagement of the first, the second and the third brakes and the first, the second and the third clutches producing various transmission ratios between the drive input shaft (1) and the drive output shaft (2) such that nine forward gears and one reverse gear can be implemented;

the drive input shaft (1) being connectable to the fourth shaft (4) via the first clutch (14);

the drive input shaft (1) being connectable to the seventh shaft (7) via the second clutch (17);

the drive input shaft (1) being connectable to the eighth shaft (8) via the third clutch (18);

the drive output shaft (2) being continuously connected to the carrier of the fourth planetary gearset (P4) and the ring gear of the first planetary gearset (P1);

the third shaft (3) being continuously connected to the sun gear of the fourth planetary gearset (P4) and being connectable, via the first brake (03), to the housing (G);

the fourth shaft (4) being continuously connected to the carrier of the third planetary gearset (P3) and the sun gear of the second planetary gearset (P2) and being connectable, via the second brake (04), to the housing (G);

the fifth shaft (5) being continuously connected to the sun gear of the first planetary gearset (P1) and the sun gear of the third planetary gearset (P3) and being connectable, via the third brake (05), to the housing (G);

the sixth shaft (6) being continuously connected to the ring gear of the second planetary gearset (P2) and the carrier of the first planetary gearset (P1);

the seventh shaft (7) being continuously connected to the ring gear of the third planetary gearset (P3); and

the eighth shaft (8) being continuously connected to the ring gear of the fourth planetary gearset (P4) and the carrier of the second planetary gearset (P2).

21. The multi-stage transmission according to claim 20, wherein a first forward gear is implemented by engagement of the first and the third brakes (03, 05) and the second clutch (17),

a second forward gear is implemented by engagement of the first and the third brakes (03, 05) and the first clutch (14),

a third forward gear is implemented by engagement of the first brake (03) and the first and the second clutches (14, 17),

a fourth forward gear is implemented by engagement of the first brake (03), the third clutch (18) and one of the first clutch (14), the second clutch (17), the second brake (04) and the third brake (05),

a fifth forward gear is implemented by engagement of the first, the second and the third clutches (14, 17, 18),

a sixth forward gear is implemented by engagement of the third brake (05) and the first and the third clutches (14, 18),

a seventh forward gear is implemented by engagement of the third brake (05) and the second and the third clutches (17, 18),

an eighth forward gear is implemented by engagement of the second and the third brakes (04, 05) and the third clutch (18),

a ninth forward gear is implemented by engagement of the second brake (04) and the second and the third clutches (17, 18), and

the reverse gear is implemented by engagement of the first and the second brakes (03, 04) and the second clutch (17).

22. The multi-stage transmission according to claim 21, wherein the fourth forward gear is implemented by engagement of the first brake (03) and the first and the third clutches (14, 18).

23. The multi-stage transmission according to claim 21, wherein the fourth forward gear is implemented by engagement of the first and the third brakes (03, 05) and the third clutch (18).

24. The multi-stage transmission according to claim 21, wherein the fourth forward gear is implemented by engagement of the first and the second brakes (03, 04) and the third clutch (18).

25. The multi-stage transmission according to claim 21, wherein the fourth forward gear is implemented by engagement of the first brake (03) and the second and the third clutches (17, 18).