Patent US3722485A successfully refreshed from Google Patents.
US3722485A
Expired / Lapsed
US
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Electronic governor for fuel-injection type internal combustion engines
Assignee: Bosch Corp
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Filing: 1971-03-09
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Granted: 1973-03-27
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Expires: 1991-03-09
Abstract
Abstract An electronic governor for fuel-injection type internal combustion engines, in which the number of component parts is minimized, the time constant is enlarged in the output voltage integrating circuit in order to eliminate the possibility of ''''hunting'''' phenomenon and thus to secure a stable state under the low-speed running condition of the engine, the speed regulation, that is, the rate of change in fuel regulating rod position for changes in the rotational speed of the engine is therefore expanded for the low-speed range, and a signal arising from the displacement of the fuel regulating rod is applied, as in positive feedback, to the rotational speed setting circuit in order to narrow the expanded speed regulation, so that a small speed regulation comes into play, under the high-speed running condition of the engine.
Inventors
- 👤 Y Ohtani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:24
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D41/40; F02D41/406; F02D41/407
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
An electronic governor for a fuel-injection type internal combustion engine comprising means for sensing the rotational speed of the engine and for generating a corresponding pulse signal having a frequency related to the rotational speed of the engine, rotational speed control means responsive to said pulse signal for controlling the pulse widths of the signal pulses, integrating means for integrating the output of said rotational speed control means and for producing a d.c. control signal in accordance therewith, and fuel regulating means responsive to said d.c. control signal produced by said integrating means for controlling the displacement of the fuel regulating rod in accordance therewith, said rotational speed control means including a timing circuit for determining the pulse widths of said pulses including a first variable inductance device providing an inductance related to the setting of the accelerator operating lever and a second variable inductance device providing an inductance related to the displacement of the fuel regulating rod whereby the amount of speed regulation provided decreases with an increase in speed.
Claim 2
Dependent Claim
171 words
An electronic governor for a fuel-injection type internal combustion engine comprising means for sensing the rotational speed of the engine and for generating a corresponding pulse signal having a frequency related to the rotational speed of the engine, rotational speed control means responsive to said pulse signal for controlling the pulse widths of the signal pulses, integrating means for integrating the output of said rotational speed control means and for producing a d.c. control signal in accordance therewith, and fuel regulating means responsive to said d.c. control signal produced by said integrating means for controlling the displacement of the fuel regulating rod in accordance therewith, said rotational speed control means including a timing circuit for determining the pulse widths of said pulses including a first variable inductance device providing an inductance related to the setting of the accelerator operating lever and a second variable inductance device providing an inductance related to the displacement of the fuel regulating rod whereby the amount of speed regulation provided decreases with an increase in speed.
Claim 3
Dependent Claim
39 words
An electronic governor as claimed in claim 1 wherein said second variable inductance device includes a movable core mechanically linked to the fuel regulating rod to provide feedback between the fuel regulating means and the rotational speed control 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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |