Patent US2960247A successfully refreshed from Google Patents.
Patent US5950781A successfully refreshed from Google Patents.
US5950781A
Expired / Lapsed
US
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Method for shifting a twin-clutch transmission and twin-clutch transmission arrangement
Assignee: Volkswagen AG
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Filing: 1998-10-27
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Granted: 1999-09-14
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Expires: 2018-10-27
Abstract
Abstract A twin-clutch transmission having the driving gear wheels of adjacent gears on different transmission input shafts permits skipping one gear stage while shifting gears, i.e. shifting between gears whose driving gear wheels are on the same transmission input shaft, by using an auxiliary gear on the other transmission input shaft to supply a filler torque while shifting between the initial gear and a selected gear.
Inventors
- 👤 Panagiotis Adamis
- 👤 Bernd Cappelmann
- 👤 Reinhold Haack
- 👤 Harald Ludanek
- 👤 Ansgar Damm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:30
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/04; F16H61/0403; B; B60; B60W; B60W10/00; B60W10/02; B60W10/10; B60W10/11; B60W10/113; B60W30/00; B60W30/18; B60W30/1819; B60W30/19; F16H61/68; F16H61/684; F16H61/688; F16H2061/0425; F16H2200/00; F16H2200/003; F16H2200/0052; F16H2306/00; F16H2306/14; F16H2306/40; F16H2306/44; F16H2306/48; F16H2306/52; F16H3/00; F16H3/006; F16H3/02; F16H3/08; F16H3/087; F16H3/089; F16H63/00; F16H63/40; F16H63/46; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19051; Y10T74/19056; Y10T74/19219; Y10T74/19228; Y10T74/19233
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A twin-clutch transmission comprising a first transmission input shaft carrying an originally engaged gear and a selected gear to be engaged after shifting, a second transmission input shaft carrying an auxiliary gear having a higher gear ratio than either the originally engaged gear or the selected gear to be engaged after shifting, each transmission input shaft having an associated clutch, and a transmission output shaft, wherein the driving gear wheels of at least three transmission gears are on the first transmission input shaft and the driving gear wheels of only two transmission gears are on the second transmission input shaft.
Claim 2
Dependent Claim
100 words
A twin-clutch transmission comprising a first transmission input shaft carrying an originally engaged gear and a selected gear to be engaged after shifting, a second transmission input shaft carrying an auxiliary gear having a higher gear ratio than either the originally engaged gear or the selected gear to be engaged after shifting, each transmission input shaft having an associated clutch, and a transmission output shaft, wherein the driving gear wheels of at least three transmission gears are on the first transmission input shaft and the driving gear wheels of only two transmission gears are on the second transmission input shaft.
Claim 3
Dependent Claim
57 words
A twin-clutch transmission according to claim 1 having six transmission gears with six gear wheel pairs and wherein the driving gear wheels of the first, third, fourth and fifth transmission gears are on the first transmission input shaft and the driving gear wheels of the second and sixth transmission gears are on the second transmission input shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-09-13 | 2003-03-15 | 2003-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-13 | 2007-03-15 | 2007-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-13 | 2011-03-15 | 2011-09-14 | $7700.00 | Window Closed / Lapsed |