Claims
- 1. A transmission for a motor vehicle, comprising:
shift rails; gear stages assigned to said shift rails; said shift rails being configured such that, in a gear change, respective ones of said shift rails are activated at least partially simultaneously; coupling units operatively connected to respective ones of said shift rails and configured to select and deselect said gear stages for performing gear changes; actuators operatively connected to respective ones of said shift rails; and said coupling units being configured to be activated via respective ones of said shift rails and respective ones of said actuators.
- 2. The transmission according to claim 1, wherein:
a first one of said shift rails has a first and a third one of said gear stages assigned thereto; and said first one of said shift rails is activated by a first one of said actuators.
- 3. The transmission according to claim 2, wherein:
a second one of said shift rails has a second and a fourth one of said gear stages assigned thereto; and said second one of said shift rails is activated by a second one of said actuators.
- 4. The transmission according to claim 3, wherein:
a third one of said shift rails has a fifth one of said gear stages assigned thereto; and said third one of said shift rails is activated by a third one of said actuators.
- 5. The transmission according to claim 4, wherein:
said third one of said shift rails further has a seventh one of said gear stages assigned thereto; and a fourth one of said shift rails has a sixth and an eighth one of said gear stages assigned thereto.
- 6. The transmission according to claim 1, wherein said shift rails, said coupling units and said actuators form a motor vehicle transmission configuration.
- 7. The transmission according to claim 1, wherein said shift rails, said coupling units and said actuators form an automated shift transmission configuration.
- 8. The transmission according to claim 1, wherein said coupling units are sliding collars configured to be engageable and disengageable.
- 9. The transmission according to claim 1, wherein said gear stages are assigned to said shift rails such that respective successive ones of said gear stages are assigned to respective different ones of said shift rails.
- 10. The transmission according to claim 1, wherein said shift rails are configured such that, when skipping at least one gear in a gear change, respective ones of said shift rails are activated at least partially simultaneously.
- 11. The transmission according to claim 1, wherein said shift rails are configured such that, in a sequential gear change, respective ones of said shift rails are activated at least partially simultaneously.
- 12. A method for controlling a transmission for a motor vehicle, the method which comprises:
providing gear stages assigned to at least two shift rails; and performing gear changes by using coupling units activated via respective shift rails and respective actuators for selecting and deselecting the gear stages in the transmission and, in case of performing a gear change, activating respective ones of the shift rails at least partially simultaneously in order to perform the gear change.
- 13. The method according to claim 12, which comprises:
activating a first shift rail by using a first actuator; and respectively selecting and deselecting a first gear stage and a third gear stage by using the first shift rail.
- 14. The method according to claim 13, which comprises:
activating a second shift rail by using a second actuator; and respectively selecting and deselecting a second gear stage and a fourth gear stage by using the second shift rail.
- 15. The method according to claim 14, which comprises:
activating a third shift rail by using a third actuator; and respectively selecting and deselecting a fifth gear stage and a seventh gear stage by using the third shift rail.
- 16. The method according to claim 15, which comprises:
activating a fourth shift rail by using a fourth actuator; and respectively selecting and deselecting a sixth gear stage and an eighth gear stage by using the fourth shift rail.
- 17. The method according to claim 12, which comprises providing the coupling units as selectively engageable and disengageable sliding collars.
- 18. The method according to claim 12, which comprises providing the gear stages assigned to the at least two shift rails such that respective successive ones of the gear stages are assigned to respective different ones of the shift rails.
- 19. The method according to claim 12, which comprises activating respective ones of the shift rails at least partially simultaneously in order to perform a sequential gear change.
- 20. The method according to claim 12, which comprises activating respective ones of the shift rails at least partially simultaneously when skipping at least one gear in a gear change.
Priority Claims (1)
Number |
Date |
Country |
Kind |
101 45 918.1 |
Sep 2001 |
DE |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a divisional of U.S. application Ser. No. 10/241,553, filed Sep. 11, 2002. This application also claims the benefit of German application No. 101 45 918.1, filed Sep. 18, 2001, under 35 U.S.C. Section 119. Both applications are herewith incorporated by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
10241553 |
Sep 2002 |
US |
Child |
10847497 |
May 2004 |
US |