US4918744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven power steering unit
Assignee: Honda Motor Co Ltd
•
Filing: 1988-06-09
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Granted: 1990-04-17
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Expires: 2008-06-09
Abstract
Abstract The motor-driven power steering unit according to the first aspect of the present invention is able to decrease the amount of current being applied to the motor if the steering force exceeds a predetermined level. The motor-driven power steering unit according to the second aspect of the present invention is able to decrease the amount of current being applied to the motor when the steering speed is less than a predetermined level.
Inventors
- 👤 Yasuo Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:37
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/04; B62D5/0457; B62D5/046; B62D5/0463; B62D5/0481
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A motor-driven power steering unit furnished with an electric motor for generating an auxiliary steering force in a steering system that couples a steering wheel to wheels of a vehicle, said steering unit assisting in the turning of the steering wheel by controlling an electric current to be applied to said electric motor based upon steering information, the motor-driven power steering unit comprising: a steering force detecting means for detecting a steering force generated in said steering system; and an overload preventing means for decreasing an electric current being applied to said electric motor when the steering force detected with said steering force detecting means exceeds a predetermined value.
Claim 2
Dependent Claim
109 words
A motor-driven power steering unit furnished with an electric motor for generating an auxiliary steering force in a steering system that couples a steering wheel to wheels of a vehicle, said steering unit assisting in the turning of the steering wheel by controlling an electric current to be applied to said electric motor based upon steering information, the motor-driven power steering unit comprising: a steering force detecting means for detecting a steering force generated in said steering system; and an overload preventing means for decreasing an electric current being applied to said electric motor when the steering force detected with said steering force detecting means exceeds a predetermined value.
Claim 3
Dependent Claim
143 words
A motor-driven power steering unit furnished with an electric motor for generating an auxiliary steering force in a steering system that couples a steering wheel to wheels of a vehicle, said steering unit assisting in the turning of the steering wheel by controlling an electric current to be applied to said electric motor based upon steering information, the motor-driven power steering unit comprising: a steering force detecting means for detecting a steering force generated in said steering system; a steering speed detecting means for detecting a steering speed produced by said steering system; and an overload preventing means for decreasing an electric current being applied to said electric motor when the steering force detected with said steering force detecting means exceeds a predetermined value and when the steering speed detected with said steering speed detecting means is not higher than a predetermined value.
Claim 4
Dependent Claim
143 words
A motor-driven power steering unit furnished with an electric motor for generating an auxiliary steering force in a steering system that couples a steering wheel to wheels of a vehicle, said steering unit assisting in the turning of the steering wheel by controlling an electric current to be applied to said electric motor based upon steering information, the motor-driven power steering unit comprising: a steering force detecting means for detecting a steering force generated in said steering system; a steering speed detecting means for detecting a steering speed produced by said steering system; and an overload preventing means for decreasing an electric current being applied to said electric motor when the steering force detected with said steering force detecting means exceeds a predetermined value and when the steering speed detected with said steering speed detecting means is not higher than a predetermined value.
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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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |