Patent US5347458A successfully refreshed from Google Patents.
US5347458A
Expired / Lapsed
US
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Vehicle steering control system
Assignee: Honda Motor Co Ltd
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Filing: 1991-09-24
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Granted: 1994-09-13
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Expires: 2011-09-24
Abstract
Abstract In a "steer-by-wire" vehicle steering control system which steers steerable wheels with a powered actuator according to an input signal obtained from a sensor associated with a steering wheel, a secondary actuator is coupled to the steering wheel for the purpose of giving the operator of the vehicle a reaction force. The reaction force on the steering wheel not only gives a familiar sensation to the vehicle operator who is more familiar with a vehicle equipped with more conventional steering system, but also improves the driveability and stability of the vehicle since the reaction force provides information on the condition of the vehicle which aids the vehicle operator in making proper and accurate steering maneuvers.
Inventors
- 👤 Mitsuya Serizawa
- 👤 Yorihisa Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:55
CPC Classifications
B; B62; B62D; B62D6/00; B62D6/008; B62D5/00; B62D5/001; B62D5/005; B62D5/006; B62D5/04; B62D5/0421; B62D5/0424; B62D5/0427
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A steering control system for a vehicle, comprising: a steering wheel; a steering mechanism for steering steerable wheels; means for detecting a steering condition of said steering wheel; a first powered actuator for actuating said steering mechanism according to a steering input from said steering wheel; and a second powered actuator for applying a reaction force T to said steering wheel, said reaction force T being proportional to the detected steering condition of said steering wheel.
Claim 2
Dependent Claim
76 words
A steering control system for a vehicle, comprising: a steering wheel; a steering mechanism for steering steerable wheels; means for detecting a steering condition of said steering wheel; a first powered actuator for actuating said steering mechanism according to a steering input from said steering wheel; and a second powered actuator for applying a reaction force T to said steering wheel, said reaction force T being proportional to the detected steering condition of said steering wheel.
Claim 3
Dependent Claim
18 words
A steering control system according to claim 1, wherein the control system is a steer-by-wire steering control system.
Claim 4
Dependent Claim
129 words
A steering control system for a vehicle comprising: a steering wheel; a steering mechanism for steering steerable wheels; a first powered actuator for actuating said steering mechanism according to a steering input from said steering wheel; a second powered actuator for applying a reaction force T to said steering wheel; and said reaction force T is represented by a mathematical function comprising an acceleration term which is proportional to an angular acceleration of said steering wheel, a velocity term which is proportional to an angular velocity of said steering wheel, a proportional term which is proportional to an angular displacement of said steering wheel, and a constant term which is constant in value but changes sign depending on said angular displacement of said steering wheel from a neutral position.
Claim 5
Dependent Claim
129 words
A steering control system for a vehicle comprising: a steering wheel; a steering mechanism for steering steerable wheels; a first powered actuator for actuating said steering mechanism according to a steering input from said steering wheel; a second powered actuator for applying a reaction force T to said steering wheel; and said reaction force T is represented by a mathematical function comprising an acceleration term which is proportional to an angular acceleration of said steering wheel, a velocity term which is proportional to an angular velocity of said steering wheel, a proportional term which is proportional to an angular displacement of said steering wheel, and a constant term which is constant in value but changes sign depending on said angular displacement of said steering wheel from a neutral position.
Claim 6
Dependent Claim
35 words
A steering control system for a vehicle according to claim 3, wherein a coefficient of at least one of said terms of said mathematical function is variable depending on an operating condition of the vehicle.
Claim 7
Dependent Claim
22 words
A steering control system for a vehicle according to claim 4, wherein said operation condition is a travelling speed of said vehicle.
Claim 8
Dependent Claim
52 words
A steering control system according to claim 3, wherein the mathematical function representing said reaction force T is T=M.sub.2 d.sup.2 θ.sub.H /dt.sup.2 +M.sub.1 dθ.sub.H /dt+M.sub.O θ.sub.H ±M.sub.C', where M 2 , M 1 , M 0 and M C are constants and θ H is the steering angle of the steering wheel.
References Cited (Backward Citations)
US4830127A
Cited
US5097917A
Cited
US5159553A
Cited
US4991676A
Cited
US5022480A
Cited
JPH02175465A
Cited
US5247441A
Cited
US5236335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |