US5041776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle power supply device
Assignee: Isuzu Motors Ltd
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Filing: 1990-03-30
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Granted: 1991-08-20
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Expires: 2010-03-30
Abstract
Abstract A motor vehicle power supply device includes an alternator drivable by an engine mounted on a motor vehicle, a battery chargeable by electric energy generated by the alternator, a capacitor connected to the alternator and the battery, and a charging speed varying circuit arrangement connected between the capacitor, and the alternator and the battery, for varying the speed at which the capacitor is charged. The charging speed varying circuit arrangement is controlled to vary the speed at which the capacitor is charged, depending on the operating condition of the motor vehicle.
Inventors
- 👤 Akihiro Shirata
- 👤 Toshifumi Koshizawa
- 👤 Yuichi Koyama
- 👤 Yoshinobu Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/32; H02J7/34; F; F02; F02N; F02N11/00; F02N11/08; F02N11/0862; F02N11/0866; H02J7/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
A motor vehicle power supply device for supplying power to a starter, comprising: an alternator drivable by an engine mounted on a motor vehicle; a battery chargeable by electric energy generated by said alternator; capacitor means, connected to said alternator and said battery and switchably connectable to the starter, for providing power to the starter; charging speed varying means connected between said capacitor, and said alternator and said battery, for varying the speed at which said capacitor means is charged; detecting means for detecting an operating condition of the motor vehicle; and control means for controlling said charging speed varying means in response to detected signals from said detecting means.
Claim 2
Dependent Claim
110 words
A motor vehicle power supply device for supplying power to a starter, comprising: an alternator drivable by an engine mounted on a motor vehicle; a battery chargeable by electric energy generated by said alternator; capacitor means, connected to said alternator and said battery and switchably connectable to the starter, for providing power to the starter; charging speed varying means connected between said capacitor, and said alternator and said battery, for varying the speed at which said capacitor means is charged; detecting means for detecting an operating condition of the motor vehicle; and control means for controlling said charging speed varying means in response to detected signals from said detecting means.
Claim 3
Dependent Claim
20 words
A motor vehicle power supply device according to claim 1, wherein said capacitor means comprises an electric double layer capacitor.
Claim 4
Dependent Claim
52 words
A motor vehicle power supply device according to claim 1, wherein said charging speed varying means comprises a plurality of parallel circuits connected to said capacitor means and having respective switch means, one of said parallel circuits having a resistor for limiting a current flowing through said one of the parallel circuits.
Claim 5
Dependent Claim
48 words
A motor vehicle power supply device according to claim 3, wherein said control means comprises means for opening said switch means of said parallel circuits to stop charging said capacitor means when the motor vehicle is started and accelerated, based on the detected signals from said detecting means.
Claim 6
Dependent Claim
49 words
A motor vehicle power supply device according to claim 3, wherein said control means comprises means for closing said switch means of said one of the parallel circuits to charge said capacitor means through said resistor when the engine idling, based on the detected signals from said detecting means.
Claim 7
Dependent Claim
51 words
A motor vehicle power supply device according to claim 3, wherein said control means comprises means for closing said switch means of the other of the parallel circuits to charge said capacitor means through said other circuit when the engine is decelerated, based on the detected signals from said detecting means.
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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |