US4946001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of controlling electric power steering apparatus
Assignee: UNISA JKC STEERING SYSTEMS Co Ltd
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Filing: 1989-03-08
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Granted: 1990-08-07
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Expires: 2009-03-08
Abstract
Abstract In a control method and apparatus of an electric power steering apparatus of this invention, a reverse torque R against a steering torque and a torque produced by the motor are detected, and a target value T DT which is set based on the reverse torque and is used when the torque produced by the motor is controlled has a range given by T DT ×R>R 2 .
Inventors
- 👤 Yoshiaki Taniguchi
- 👤 Masaki Watanabe
- 👤 Ryuji Iizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:11
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/04; B62D5/0457; B62D5/046; B62D5/0466
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
An electric power steering apparatus for assisting a steering torque with a motor output torque, comprising: detection means for detecting a reverse torque R against the steering torque and the motor output torque; target value setting means for setting a target value T DT , of a parameter for determining a steering operation based on the detected reverse torque R; and control means for controlling the motor output torque based upon the detected reverse torque R and the target value T DT whereby T DT ×R>R 2 .
Claim 2
Dependent Claim
88 words
An electric power steering apparatus for assisting a steering torque with a motor output torque, comprising: detection means for detecting a reverse torque R against the steering torque and the motor output torque; target value setting means for setting a target value T DT , of a parameter for determining a steering operation based on the detected reverse torque R; and control means for controlling the motor output torque based upon the detected reverse torque R and the target value T DT whereby T DT ×R>R 2 .
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1, wherein the steering torque is detected by a torque sensor connected to a steering unit.
Claim 4
Dependent Claim
40 words
An apparatus according to claim 1, wherein the reverse torque R is obtained by an R calculator for calculating the reverse torque based on the steering torque, the motor output torque, a pinion angular velocity, and a pinion angular acceleration.
Claim 5
Dependent Claim
83 words
A control method of an electric power steering apparatus, comprising the steps of: detecting a reverse torque R against a steering torque obtained by a steering operation and an output torque from a motor for assisting the steering torque; setting a target value TDT of a parameter for determining a steering operation based on the detected reverse torque R; and controlling the motor output torque based upon the detected reverse torque R and the target value TDT whereby T DT ×R>R 2 .
Claim 6
Dependent Claim
83 words
A control method of an electric power steering apparatus, comprising the steps of: detecting a reverse torque R against a steering torque obtained by a steering operation and an output torque from a motor for assisting the steering torque; setting a target value TDT of a parameter for determining a steering operation based on the detected reverse torque R; and controlling the motor output torque based upon the detected reverse torque R and the target value TDT whereby T DT ×R>R 2 .
Claim 7
Dependent Claim
40 words
A method according to claim 4, wherein the reverse torque R is obtained by an R calculator for calculating the reverse torque based on the steering torque, the motor output torque, a pinion angular velocity, and a pinion angular acceleration.
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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |