Patent US5033329A successfully refreshed from Google Patents.
US5033329A
Expired / Lapsed
US
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System for controlling distribution of torque to left and right wheels of a motor vehicle
Assignee: Subaru Corp
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Filing: 1990-08-03
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Granted: 1991-07-23
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Expires: 2010-08-03
Abstract
Abstract A differential is provided between a left and a right wheels of a motor vehicle for distributing an output torque of a transmission to the left and the right wheels. A fluid operated multiple-disk clutch is provided for restricting the differential operation of the differential. A speed difference between the left and the right wheels is calculated, and an input torque to the differential is determined. The fluid operated multiple-disk clutch is operated in accordance with the speed difference and the input torque, in such a manner that the restricting magnitude increases with increases of the speed difference and the input torque.
Inventors
- 👤 Kazunari Tezuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:11
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/22; B; B60; B60K; B60K23/00; B60K23/04; F16H48/06; F16H48/08; F16H48/30; F16H48/34; F16H2048/204; F16H2200/00; F16H2200/20; F16H2200/203; F16H2200/2071; F16H48/32; F16H48/38; F16H48/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A system for controlling a torque distribution to a left and a right wheels of a motor vehicle, having a transmission, a differential for distributing an output torque of the transmission to said left and right wheels, and a restricting device for restricting a differential operation of said differential, the system comprising: calculator means for calculating a speed difference between speeds of said left wheel and said right wheel; means for determining an input torque input to said differential and for producing a differential input torque; setting means responsive to the calculated speed difference and said differential input torque for setting a restricting force of said restricting device to a value which increases with an increase of said speed difference and said differential input torque; and control means responsive to said restricting force for operating said restricting device so as to accurately control said torque distribution without wheel slipping.
Claim 2
Independent Claim
149 words
A system for controlling a torque distribution to a left and a right wheels of a motor vehicle, having a transmission, a differential for distributing an output torque of the transmission to said left and right wheels, and a restricting device for restricting a differential operation of said differential, the system comprising: calculator means for calculating a speed difference between speeds of said left wheel and said right wheel; means for determining an input torque input to said differential and for producing a differential input torque; setting means responsive to the calculated speed difference and said differential input torque for setting a restricting force of said restricting device to a value which increases with an increase of said speed difference and said differential input torque; and control means responsive to said restricting force for operating said restricting device so as to accurately control said torque distribution without wheel slipping.
Claim 3
Dependent Claim
15 words
The system according to claim 1, wherein said restricting device is a fluid-operated friction clutch.
Claim 4
Dependent Claim
31 words
The system according to claim 1, wherein said differential input torque is determined in accordance with output torque of an engine of said vehicle and a gear ratio of said transmission.
References Cited (Backward Citations)
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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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |