Patent US5224094A successfully refreshed from Google Patents.
US4567413A
Expired / Lapsed
US
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Method and device for controlling power steering apparatus
Assignee: Jidosha Kiki Co Ltd
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Filing: 1984-06-12
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Granted: 1986-01-28
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Expires: 2004-06-12
Abstract
Abstract A method and device for controlling a power steering apparatus for performing power steering by controlling a rotational speed of a motor-driven oil pump, wherein an alarm signal is generated when the power steering apparatus is overloaded, and a current is not supplied to a motor for a predetermined period of time when the power steering apparatus is overloaded.
Inventors
- 👤 Hideo Yabe
- 👤 Ichiro Koike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:17
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/061
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
A device for controlling a power steering apparatus having an oil pump driven by a motor, said device comprising: first detecting means for detecting that the motor is imposed with a high load; second detecting means for detecting that the motor is imposed with an overload; an alarm unit for generating an alarm in response to an output from said first detecting means; and controlling means for inhibiting supply of current to the motor for a predetermined period of time upon reception of an output from said second detecting means and for enabling supply of current to the motor after said predetermined period of time has elapsed, said controlling means including a timer for generating an output when a time interval has elapsed after said second detecting means generates an output, an integrator for integrating the output from said second detecting means, an AND gate for receiving outputs from said timer and said integrator, and means for opening a switch inserted between the motor and a power supply for the predetermined period of time in response to an output from said AND gate.
Claim 2
Independent Claim
183 words
A device for controlling a power steering apparatus having an oil pump driven by a motor, said device comprising: first detecting means for detecting that the motor is imposed with a high load; second detecting means for detecting that the motor is imposed with an overload; an alarm unit for generating an alarm in response to an output from said first detecting means; and controlling means for inhibiting supply of current to the motor for a predetermined period of time upon reception of an output from said second detecting means and for enabling supply of current to the motor after said predetermined period of time has elapsed, said controlling means including a timer for generating an output when a time interval has elapsed after said second detecting means generates an output, an integrator for integrating the output from said second detecting means, an AND gate for receiving outputs from said timer and said integrator, and means for opening a switch inserted between the motor and a power supply for the predetermined period of time in response to an output from said AND gate.
Claim 3
Dependent Claim
23 words
A device according to claim 1, wherein said first and second detecting means include a current detector for detecting a motor bias current.
Claim 4
Dependent Claim
35 words
A device according to claim 1, wherein said first detecting means comprises a current detector for detecting a motor bias current, and said second detecting means comprises a temperature detector for detecting a motor temperature.
Claim 5
Dependent Claim
59 words
A device according to claim 1, wherein said controlling means comprises discriminating means for detecting that said second detecting means still generates an output even when a time interval has elapsed after said second detecting means generates the output, and means for opening a switch inserted between the motor and a power supply for the predetermined period of time.
Claim 6
Independent Claim
147 words
A device for controlling a power steering apparatus having an oil pump driven by a motor, said deivce comprising: first detecting means for detecting that the motor is imposed with a high load; second detecting means for detecting that the motor is imposed with an overload; an alarm unit for generating an alarm in response to an output from the first detecting means; controlling means for inhibiting supply of current to the motor for a predetermined period of time upon reception of an output from said second detecting means and for enabling supply of current to the motor after said predetermined period of time has elapsed; and third detecting means for detecting that the power steering apparatus is not set in a high-load state when the predetermined period of time has elapsed; said controlled means continuously de-energizing the motor unless said third detecting means generates an output.
Claim 7
Independent Claim
147 words
A device for controlling a power steering apparatus having an oil pump driven by a motor, said deivce comprising: first detecting means for detecting that the motor is imposed with a high load; second detecting means for detecting that the motor is imposed with an overload; an alarm unit for generating an alarm in response to an output from the first detecting means; controlling means for inhibiting supply of current to the motor for a predetermined period of time upon reception of an output from said second detecting means and for enabling supply of current to the motor after said predetermined period of time has elapsed; and third detecting means for detecting that the power steering apparatus is not set in a high-load state when the predetermined period of time has elapsed; said controlled means continuously de-energizing the motor unless said third detecting means generates an output.
Claim 8
Independent Claim
220 words
A device for controlling a power steering apparatus having an oil pump driven by a motor, said device comprising: first detecting means for detecting that the motor is imposed with a high load; second detecting means for detecting that the motor is imposed with an overload; an alarm unit for generating an alarm in response to an output from said first detecting means; controlling means for inhibiting supply of current to the motor for a predetermined period of time upon reception of an output from said second detecting means and for enabling supply of current to the motor after said predetermined period of time has elapsed; and third detecting means for detecting that the power steering apparatus is not set in a high-load state when the predetermined period of time has elapsed; said controlling means further comprising a timer for generating an output when a time interval has elapsed after said second detecting means generates an output, a flipflop which is set in response to the output from said second detecting means, and a gate for generating an output in response from the output from said timer unless said third detecting means does not generate an output, said flipflop being provided with means for opening a switch inserted between the motor and a power supply until said flipflop is set.
Claim 9
Independent Claim
220 words
A device for controlling a power steering apparatus having an oil pump driven by a motor, said device comprising: first detecting means for detecting that the motor is imposed with a high load; second detecting means for detecting that the motor is imposed with an overload; an alarm unit for generating an alarm in response to an output from said first detecting means; controlling means for inhibiting supply of current to the motor for a predetermined period of time upon reception of an output from said second detecting means and for enabling supply of current to the motor after said predetermined period of time has elapsed; and third detecting means for detecting that the power steering apparatus is not set in a high-load state when the predetermined period of time has elapsed; said controlling means further comprising a timer for generating an output when a time interval has elapsed after said second detecting means generates an output, a flipflop which is set in response to the output from said second detecting means, and a gate for generating an output in response from the output from said timer unless said third detecting means does not generate an output, said flipflop being provided with means for opening a switch inserted between the motor and a power supply until said flipflop is set.
References Cited (Backward Citations)
US3665399A
Cited
DE2758308A1
Cited
JPS5576760A
Cited
US4392540A
Cited
US4478595A
Cited
US4476529A
Cited
US4476677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |