US4661760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for engine-driven generator
Assignee: Honda Motor Co Ltd
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Filing: 1984-06-01
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Granted: 1987-04-28
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Expires: 2004-06-01
Abstract
Abstract There is disclosed herein a generator control system for use in a power supply system for vehicles in which a battery and an engine-driven generator are connected in parallel with a load. The total load current fed to the load is detected and the generated voltage level is changed by performing field regulation for the generator in accordance with the detected value. Switching of the generated voltage level of the generator is controlled according to the state of the load applied so as to improve power generation efficiency. Certain parameters, such as battery state, engine speed, auto choke and load state, can be provided as an input or inputs to a voltage regulator for the generator.
Inventors
- 👤 Hiroshi Goto
- 👤 Akira Kikuchi
- 👤 Yoshitaka Hibino
- 👤 Atsushi Totsune
- 👤 Norimitsu Kurihara
- 👤 Takefumi Hosaka
- 👤 Takeshi Kijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:24
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/1438; H02J7/1446; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
87 words
In a power supply system for a vehicle in which a battery and an engine-driven generator are electrically connected in parallel with an electric load, a control system for the engine-driven generator, said control system including first means connected in series with the electric load for directly detecting the total load current fed to the electric load, and second means for switching the generated voltage level of the generator by performing a field regulation for the generator in accordance with the detected output of said first means.
Claim 2
Dependent Claim
87 words
In a power supply system for a vehicle in which a battery and an engine-driven generator are electrically connected in parallel with an electric load, a control system for the engine-driven generator, said control system including first means connected in series with the electric load for directly detecting the total load current fed to the electric load, and second means for switching the generated voltage level of the generator by performing a field regulation for the generator in accordance with the detected output of said first means.
Claim 3
Dependent Claim
30 words
An engine-driven generator control system according to claim 1, wherein said second means performs the field regulation for the generator by switching the generated voltage level in a stepwise manner.
Claim 4
Dependent Claim
31 words
An engine-driven generator control system according to claim 1, wherein said second means performs the field regulation for the generator by switching the generated voltage level linearly in a stepless manner.
Claim 5
Dependent Claim
34 words
An engine-driven generator control system according to claim 1, wherein said second means includes a filter circuit for cancelling variations caused by an intermittent load in the load current detected by said first means.
Claim 6
Dependent Claim
40 words
An engine-driven generator control system according to claim 1, wherein said second means includes a hold circuit for holding the load current detected by said first means for a preset time period to smooth variations caused by an intermittent load.
Claim 7
Dependent Claim
41 words
An engine-driven generator control system according to claim 1, wherein said second means includes an inhibit circuit for cancelling variations caused by an intermittent load by not responding to a change of load current within a time-period preset by a timer.
Claim 8
Dependent Claim
40 words
An engine-driven generator control system according to claim 1, wherein said second means includes means for switching the generated voltage level preferentially to a higher level when a detected charging voltage of the battery is lower than a preset value.
Claim 9
Dependent Claim
40 words
An engine-driven generator control system according to claim 1, wherein said second means includes means for switching the generated voltage level preferentially to a higher level when a detected temperature of engine cooling water is lower than a preset value.
Claim 10
Dependent Claim
41 words
An engine-driven generator control system according to claim 1, wherein said second means includes means for switching the generated voltage level preferentially to a higher level when a detected intake air temperature in the engine is lower than a preset value.
Claim 11
Dependent Claim
40 words
An engine-driven generator control system according to claim 1, wherein said second means includes means for switching the generated voltage level preferably to a higher level when a detected output torque of the engine is higher than a preset value.
Claim 12
Dependent Claim
32 words
An engine-driven generator control system according to claim 1, wherein said second means includes means for switching the generated voltage level preferentially to a higher level in accordance with a choke signal.
Claim 13
Dependent Claim
94 words
In a power supply system for a vehicle in which a battery and an engine-driven generator are electrically connected in parallel with respect to an electric load, a control system for the engine-driven generator including current detector means connected in series with the load for detecting the total load current fed to the load, and generated voltage regulator means responsive to said current detector means and connected to said generator for switching the generated voltage level by controlling the field regulation of the generator in accordance with the output of said current detector means.
Claim 14
Dependent Claim
94 words
In a power supply system for a vehicle in which a battery and an engine-driven generator are electrically connected in parallel with respect to an electric load, a control system for the engine-driven generator including current detector means connected in series with the load for detecting the total load current fed to the load, and generated voltage regulator means responsive to said current detector means and connected to said generator for switching the generated voltage level by controlling the field regulation of the generator in accordance with the output of said current detector means.
Claim 15
Dependent Claim
47 words
An engine-driven generator control system according to claim 1, wherein said current detector means further includes means for judging the state of the load which is responsive to total load current fed to the load and for providing an output signal to said generated voltage regulator means.
Claim 16
Dependent Claim
25 words
An engine-driven generator control system according to claim 1, further including a battery state detector for applying a control input to said generated voltage regulator.
Claim 17
Dependent Claim
25 words
An engine-driven generator control system according to claim 1, further including engine parameter detector means connected for providing an input to said generated voltage regulator.
Claim 18
Dependent Claim
24 words
An engine-driven generator control system according to claim 1, wherein said current detector means includes a shunt resistor for detecting the total load current.
Claim 19
Dependent Claim
86 words
A power supply system for a vehicle in which a battery and an engine-driven generator are electrically connected together in parallel and in parallel with an electric load, a control system for the engine-driven generator including first impedence means connected in series with the electric load for directly detecting the total load current fed to the electric load by the battery and generator, and second means for performing field regulation for the generator as a function of the total load current detected by the first means.
Claim 20
Dependent Claim
86 words
A power supply system for a vehicle in which a battery and an engine-driven generator are electrically connected together in parallel and in parallel with an electric load, a control system for the engine-driven generator including first impedence means connected in series with the electric load for directly detecting the total load current fed to the electric load by the battery and generator, and second means for performing field regulation for the generator as a function of the total load current detected by the first 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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |