US4672861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive system for automobiles having two driven axles
Assignee: Steyr Daimler Puch AG
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Filing: 1985-10-11
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Granted: 1987-06-16
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Expires: 2005-10-11
Abstract
Abstract In a drive system for automobiles having two driven axles, a differential gearing between the axles serves at the same time as distributor gearing. A fluid friction clutch is associated with the differential gearing as an optional differential lock thereof. In order to guarantee that the distribution of the driving torques to the two axles can be changed either arbitrarily by hand or automatically on the basis of various operational data, each of the two parts of the fluid friction clutch, adapted for being coupled with each other, is driven from one of two output members of the differential gearing. A preferably continuously adjustable change-speed gearing is associated with one of the two output members. At least one piston drive for acting upon the change-speed gearing and a control unit lodged in an actuating line for the piston drive, as well as a governor for processing operational data of the vehicle or the engine thereof can also be provided.
Inventors
- 👤 Heribert Lanzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:38
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/34; B60K17/344; B60K17/346; B60K17/3462
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A drive system for an automotive vehicle having two driven axles, comprising a differential gearing having two output members, each of said output members operatively connected to said driven axles respectively to distribute torque to said driven axles, a fluid friction clutch having first and second parts coupled to each other, said first part being driven by said first output member, said second part being driven by said second output member, said first and second parts receiving input from said first and second output members at all times, and a change speed gearing disposed between one of said output members and its associated clutch part, whereby said fluid friction clutch is actuable as a differential lock for said differential gearing, and the ratio of torque distributed to said two driven axles is adjustable.
Claim 2
Dependent Claim
133 words
A drive system for an automotive vehicle having two driven axles, comprising a differential gearing having two output members, each of said output members operatively connected to said driven axles respectively to distribute torque to said driven axles, a fluid friction clutch having first and second parts coupled to each other, said first part being driven by said first output member, said second part being driven by said second output member, said first and second parts receiving input from said first and second output members at all times, and a change speed gearing disposed between one of said output members and its associated clutch part, whereby said fluid friction clutch is actuable as a differential lock for said differential gearing, and the ratio of torque distributed to said two driven axles is adjustable.
Claim 3
Dependent Claim
13 words
The drive system of claim 1, wherein said change-speed gearing is continuously shiftable.
Claim 4
Dependent Claim
29 words
The drive system of claim 1, further comprising at least one piston drive adapted for acting upon said change-speed gearing and a control unit for actuating said piston drive.
Claim 5
Dependent Claim
25 words
The drive system of claim 3, wherein said control unit comprises governor means adapted for processing operational data of said vehicle or an engine thereof.
Claim 6
Dependent Claim
18 words
The drive system of claim 3, wherein said change-speed gearing is a continuously adjustable cone-pulley equipped looping transmission.
Claim 7
Dependent Claim
108 words
The drive system of claim 1 wherein said first output member is operatively connected to said first driven axle via a first shaft, one end of said first shaft being connected to said first driven axle, the other end of said first shaft being connected to said first part of said fluid friction clutch, and wherein said second output member is operatively connected to said second driven axle via a second shaft, one end of said second shaft being connected to said second driven axle, the other end of said second shaft being connected to said second part of said fluid friction clutch via said change speed gearing.
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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) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |