US5285862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply system for hybrid vehicles
Assignee: Toyota Motor Corp
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Filing: 1993-03-09
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Granted: 1994-02-15
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Expires: 2013-03-09
Abstract
Abstract When voltage at the main battery 10 is lowered, an EV-ECU 36 instructs a starting motor 24 to rotate to actuate an engine 26 for the initiation of power generation. At that time, the starting motor receives electric current mainly from a power capacitor 34, while an auxiliary battery 22 is connected to the ECU 36 and an ECU 38 so that supply voltages at the ECU's 36 and 38 can be kept at a predetermined level irrespective of the drive of the starting motor 24. Also, when the upstream voltage of the auxiliary battery 22 is found to be less than a predetermined value through a comparator 40, the drive of the starting motor is not effected. This configuration prevents the voltage at the auxiliary battery 22 from continuing to be lowered due to the drive of the starting motor 24 in the case where the power capacitor 34 is in a poorly charged state.
Inventors
- 👤 Masayuki Furutani
- 👤 Yoshiyuki Nakamura
- 👤 Ryoji Oki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:56
CPC Classifications
B; B60; B60W; B60W20/00; B60W20/10; B60W20/13; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/28; B60K6/42; B60K6/46; B60L; B60L50/00; B60L50/40; B60L50/50; B60L50/51; B60L50/60; B60L50/61; B60W10/00; B60W10/04; B60W10/06; B60W10/24; B60W10/26; B60W10/30; B60Y; B60Y2400/00; B60Y2400/11; B60Y2400/114; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/70; Y02T10/7072; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/907
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A power supply system for use in a hybrid vehicle including an engine for power generation as well as a drive motor for vehicle propulsion, comprising: a drive power supply for driving said drive motor; a starting motor for the actuation of said engine; a first power supply means which receives electric power from said drive power supply and provides electric power to said starting motor; a control section which receives electric power from said drive power supply and controls the drive of said starting motor; and a second power supply means which is connected between said drive power supply and said control section in parallel with said control section and maintains supply voltage at said control section.
Claim 2
Dependent Claim
118 words
A power supply system for use in a hybrid vehicle including an engine for power generation as well as a drive motor for vehicle propulsion, comprising: a drive power supply for driving said drive motor; a starting motor for the actuation of said engine; a first power supply means which receives electric power from said drive power supply and provides electric power to said starting motor; a control section which receives electric power from said drive power supply and controls the drive of said starting motor; and a second power supply means which is connected between said drive power supply and said control section in parallel with said control section and maintains supply voltage at said control section.
Claim 3
Dependent Claim
47 words
A power supply system for a hybrid vehicle according to claim 1, further comprises an isolation means for separating said starting motor and said first power supply means from said control section and said second power supply means at the time of operation of said starting motor.
Claim 4
Dependent Claim
60 words
A power supply system for a hybrid vehicle according to claim 1, further comprising a voltage detection means for detecting supply voltage at said control section, wherein said control section prohibits the drive of said starting motor in the case where said supply voltage at said control section detected by said voltage detection means is less than a predetermined value.
Claim 5
Dependent Claim
32 words
A power supply system for a hybrid vehicle according to any one of claims 1 to 3, wherein at least one of said first and second power supply means comprises a battery.
Claim 6
Dependent Claim
151 words
A power supply system for use in a hybrid vehicle including an engine for power generation as well as a drive motor for vehicle propulsion, comprising: a drive power supply for driving said drive motor; a starting motor for the actuation of said engine; a first power supply means which receives electric power from said drive power supply and provides electric power to said starting motor; a control section which receives electric power from said first power supply means and controls the drive of said starting motor; a second power supply means which is connected between said first power supply means and said control section in parallel with said first power supply means and maintains supply voltage at said control section; and an isolation means for separating said control section and said second power supply means from said first power supply means at the time of operation of said starting motor.
Claim 7
Dependent Claim
151 words
A power supply system for use in a hybrid vehicle including an engine for power generation as well as a drive motor for vehicle propulsion, comprising: a drive power supply for driving said drive motor; a starting motor for the actuation of said engine; a first power supply means which receives electric power from said drive power supply and provides electric power to said starting motor; a control section which receives electric power from said first power supply means and controls the drive of said starting motor; a second power supply means which is connected between said first power supply means and said control section in parallel with said first power supply means and maintains supply voltage at said control section; and an isolation means for separating said control section and said second power supply means from said first power supply means at the time of operation of said starting motor.
Claim 8
Dependent Claim
60 words
A power supply system for a hybrid vehicle according to claim 5, further comprising a voltage detection means for detecting supply voltage at said control section, wherein said control section prohibits the drive of said starting motor in the case where said supply voltage at said control section detected by said voltage detection means is less than a predetermined value.
Claim 9
Dependent Claim
29 words
A power supply system for a hybrid vehicle according to claim 5 or 6, wherein at least one of said first and second power supply means comprises a battery.
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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) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |