US5048629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear wheel steering method for a four wheel steering vehicle
Assignee: Honda Motor Co Ltd
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Filing: 1990-07-03
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Granted: 1991-09-17
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Expires: 2010-07-03
Abstract
Abstract In a four-wheel steering system for steering front and rear wheels of a vehicle in opposite directions in a low vehicle speed range, a rear wheel steering method steers the rear wheels more greatly in a predetermined low vehicle speed range in which a vehicle is usually steered by large angles than in a very low vehicle speed range lower than the predetermined range. The method insures a small turn of the vehicle while suppressing a change in the radius of a turn relative to the operation of a steering wheel immediately after the start of the vehicle.
Inventors
- 👤 Masaru Abe
- 👤 Takashi Kohata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:33
CPC Classifications
B; B62; B62D; B62D7/00; B62D7/06; B62D7/14; B62D7/15; B62D7/159
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
169 words
A method for steering of a four wheel steering vehicle having steerable front and rear wheels, a steering ratio existing between the front and rear wheels which is determined by dividing a steering angle of the rear wheels by a steering angle of the front wheels, and the rear wheels being steered in the opposite direction to the front wheels in a low vehicle speed range by a predetermined steering ratio relative to the steering angle of the front wheels in matching relation to a vehicle speed, comprising the steps of: in a first low vehicle speed range of said low vehicle speed range, steering the rear wheels by a first steering ratio relative to a steering angle of the front wheels; and in a predetermined second low vehicle speed range of said low vehicle speed range which is higher than said first low vehicle speed range, steering the rear wheels by a second steering ratio greater than said first steering ratio of said first low vehicle speed range.
Claim 2
Independent Claim
169 words
A method for steering of a four wheel steering vehicle having steerable front and rear wheels, a steering ratio existing between the front and rear wheels which is determined by dividing a steering angle of the rear wheels by a steering angle of the front wheels, and the rear wheels being steered in the opposite direction to the front wheels in a low vehicle speed range by a predetermined steering ratio relative to the steering angle of the front wheels in matching relation to a vehicle speed, comprising the steps of: in a first low vehicle speed range of said low vehicle speed range, steering the rear wheels by a first steering ratio relative to a steering angle of the front wheels; and in a predetermined second low vehicle speed range of said low vehicle speed range which is higher than said first low vehicle speed range, steering the rear wheels by a second steering ratio greater than said first steering ratio of said first low vehicle speed range.
Claim 3
Dependent Claim
47 words
A method as claimed in claim 1, wherein during deceleration of the vehicle said second steering ratio, in said predetermined second low vehicle speed range, is controlled to have a value substantially equal to that of said first steering ratio of said first low vehicle speed range.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |