Patent CA939152A successfully refreshed from Google Patents.
US5778997A
Expired / Lapsed
US
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Method and device for controlling generator for hybrid vehicle
Assignee: Denso Corp
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Filing: 1996-01-17
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Granted: 1998-07-14
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Expires: 2016-01-17
Abstract
Abstract A generator is controlled by a controller to generate power sufficient to a battery quickly in addition to power which is required by a wheel-drive motor for a while after a car is started and until a battery charging ratio becomes higher than a first predetermined ratio, between 80% and 100% for example. When the battery charging ratio becomes higher than the first predetermined ratio, the generator is controlled to generate a regulated power which is obtained by adding a constant power to the mean value of the power required by the wheel-drive motor to prevent the battery from generating gases due to overcharging. When the battery-charging ratio further increases and becomes higher than a second predetermined ratio, 120% for example, the generator is controlled to generate less power than the requirement of the wheel-drive-motor.
Inventors
- 👤 Yousuke Setaka
- 👤 Keiichiro Banzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:28
CPC Classifications
B; B60; B60L; B60L58/00; B60L58/10; B60L58/12; B60L58/13; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/46; B60L3/00; B60L3/0023; B60L3/0046; B60L50/00; B60L50/50; B60L50/60; B60L50/61; B60L58/18; B60L58/22; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/08; B60W10/24; B60W10/26; B60W20/00; B60W20/10; B60W20/13; H; H02; H02J; H02J7/00; H02J7/14; H02J7/1415; B60L2210/00; B60L2210/30; B60L2210/40; B60W2510/00; B60W2510/24; B60W2510/242; B60W2510/244; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/70; Y02T10/7072; Y02T10/72; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
A method for controlling a generator for a series-hybrid car including an engine-driven generator, an assembled battery, and a wheel-drive motor energized by said generator and said battery, said method comprising the steps of: detecting current wheel-drive-motor power; memorizing said current wheel-drive-motor power once in a set time; detecting battery charging state; and controlling said generator to generate output power in accordance with said battery charging state, wherein said step of controlling said generator comprises a first step of controlling said generator to generate maximum output power if said charging state of said battery is lower than a first level; and when said charging state becomes higher than said first level, a second step of controlling said generator to generate output power which is a sum of a fixed power and said current wheel-drive-motor power memorized during said step of memorizing.
Claim 2
Independent Claim
141 words
A method for controlling a generator for a series-hybrid car including an engine-driven generator, an assembled battery, and a wheel-drive motor energized by said generator and said battery, said method comprising the steps of: detecting current wheel-drive-motor power; memorizing said current wheel-drive-motor power once in a set time; detecting battery charging state; and controlling said generator to generate output power in accordance with said battery charging state, wherein said step of controlling said generator comprises a first step of controlling said generator to generate maximum output power if said charging state of said battery is lower than a first level; and when said charging state becomes higher than said first level, a second step of controlling said generator to generate output power which is a sum of a fixed power and said current wheel-drive-motor power memorized during said step of memorizing.
Claim 3
Dependent Claim
54 words
A method for controlling a generator as claimed in claim 1 wherein said step of controlling said generator further comprises a third step of controlling said generator to generate less output power than said wheel-drive-motor power which is memorized during said step of memorizing, when said charging state becomes higher than a second level.
Claim 4
Dependent Claim
35 words
A method for controlling a generator as claimed in claim 1 or claim 2 further comprising a step of holding said step of controlling said generator for a predetermined time after said generator is started.
Claim 5
Dependent Claim
39 words
A method for controlling a generator as claimed in claim 1 or claim 2 further comprising a step of holding said step of controlling said generator for a predetermined travel distance of said car after said generator is started.
Claim 6
Independent Claim
169 words
A method for controlling a generator for a series-hybrid car including an engine-driven generator, a battery, wheel-drive motor energized by said generator and said battery, a battery-current sensor, a generator-current sensor, a battery-voltage sensor and a wheel-drive-motor power detecting unit, said method comprising: a first step of controlling said generator to generate more output power than said wheel-drive-motor power to charge said battery when said charging state of said battery is under a first level; and a second step of controlling said generator to generate output power to charge said battery with regulated power which is given by adding a fixed power to a previously detected value of said wheel-drive-motor power when said charging state becomes higher than said first level, wherein said second step comprises: a step of sampling a plurality of data of said wheel-drive motor power in a fixed time; a step of calculating an arithmetical mean value of said plurality of data; and a step of adding said fixed power to said arithmetical mean value.
Claim 7
Independent Claim
169 words
A method for controlling a generator for a series-hybrid car including an engine-driven generator, a battery, wheel-drive motor energized by said generator and said battery, a battery-current sensor, a generator-current sensor, a battery-voltage sensor and a wheel-drive-motor power detecting unit, said method comprising: a first step of controlling said generator to generate more output power than said wheel-drive-motor power to charge said battery when said charging state of said battery is under a first level; and a second step of controlling said generator to generate output power to charge said battery with regulated power which is given by adding a fixed power to a previously detected value of said wheel-drive-motor power when said charging state becomes higher than said first level, wherein said second step comprises: a step of sampling a plurality of data of said wheel-drive motor power in a fixed time; a step of calculating an arithmetical mean value of said plurality of data; and a step of adding said fixed power to said arithmetical mean value.
Claim 8
Independent Claim
130 words
A device for controlling a generator for a series-hybrid car including an engine-driven generator, a battery connected to said generator, and a wheel-drive motor energized by said generator and said battery, said device comprising: a power detecting unit for detecting motor power; a memory for storing a current motor power once in a set time; a battery charge detecting unit for detecting a charging ratio of said battery; a first charging control unit for controlling said generator to generate maximum output power when said charging ratio is lower than a first level; and a second charging control unit for controlling said generator to generate regulated output power which is a sum of a fixed power and said current motor power when said charging ratio is higher than said first level.
Claim 9
Independent Claim
130 words
A device for controlling a generator for a series-hybrid car including an engine-driven generator, a battery connected to said generator, and a wheel-drive motor energized by said generator and said battery, said device comprising: a power detecting unit for detecting motor power; a memory for storing a current motor power once in a set time; a battery charge detecting unit for detecting a charging ratio of said battery; a first charging control unit for controlling said generator to generate maximum output power when said charging ratio is lower than a first level; and a second charging control unit for controlling said generator to generate regulated output power which is a sum of a fixed power and said current motor power when said charging ratio is higher than said first level.
Claim 10
Dependent Claim
34 words
A device for controlling a generator as claimed in claim 6, wherein said first charging control unit comprises means for holding battery charge for a fixed time period after said generator is turned on.
Claim 11
Dependent Claim
37 words
A device for controlling a generator as claimed in claim 6, wherein said first charging control unit comprises means for holding battery charge for a fixed travel distance of said car after said generator is turned on.
Claim 12
Independent Claim
139 words
A device for controlling a generator for a series-hybrid car including an engine-driven generator, a battery connected to said generator, and a wheel-drive motor energized by said generator and said battery, said device comprising: a power detecting unit for periodically detecting motor power; a circuit providing an arithmetical mean value of said motor power which is periodically detected in a preceding period; a battery charge detecting unit for detecting a charging ratio of said battery; first means for controlling said generator to generate maximum output power to charge said battery when said charging ratio is lower than a first level between 50% and 80%; and second means for controlling said generator to generate regulated output power which is a sum of a fixed value and said arithmetical mean value when said charging ratio is higher than said first level.
Claim 13
Independent Claim
139 words
A device for controlling a generator for a series-hybrid car including an engine-driven generator, a battery connected to said generator, and a wheel-drive motor energized by said generator and said battery, said device comprising: a power detecting unit for periodically detecting motor power; a circuit providing an arithmetical mean value of said motor power which is periodically detected in a preceding period; a battery charge detecting unit for detecting a charging ratio of said battery; first means for controlling said generator to generate maximum output power to charge said battery when said charging ratio is lower than a first level between 50% and 80%; and second means for controlling said generator to generate regulated output power which is a sum of a fixed value and said arithmetical mean value when said charging ratio is higher than said first level.
Claim 14
Dependent Claim
34 words
A device for controlling a generator as claimed in claim 9, wherein said first charging control unit comprises means for holding battery charge for a fixed time period after said generator is turned on.
Claim 15
Dependent Claim
37 words
A device for controlling a generator as claimed in claim 9, wherein said first charging control unit comprises means for holding battery charge for a fixed travel distance of said car after said generator is turned on.
Claim 16
Dependent Claim
44 words
A device for controlling a generator as claimed in claim 9 further comprising a third means for controlling said generator to generate less output power than said arithmetical mean value when said charging ratio becomes higher than a second level between 100% and 120%.
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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) | 2001-07-13 | 2002-01-12 | 2002-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-13 | 2006-01-12 | 2006-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-13 | 2010-01-12 | 2010-07-14 | $7700.00 | Window Closed / Lapsed |