Patent US3844263A successfully refreshed from Google Patents.
US3844263A
Expired / Lapsed
US
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Supercharge-type fuel injection control system
Assignee: Denso Corp
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Filing: 1973-08-03
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Granted: 1974-10-29
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Expires: 1993-08-03
Abstract
Abstract A fuel injection control system is provided wherein the supercharging pressure in an inlet pipe is detected and compared with the fuel pressure by a comparator and a fuel pressure regulating electromagnetic valve is controlled by the output of the comparator, whereby the fuel pressure is increased in accordance with the supercharging pressure to reduce the ratio of the injection time duration at full load to that at idling and thereby to reduce the duration of the opening of a fuel injection valve. In this way, it is possible to accomplish a proper fuel injection without requiring any additional injection valve.
Inventors
- 👤 K Endo
- 👤 K Negi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:27
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02D43/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
A supercharge-type fuel injection control system comprising a supercharging pressure detector for detecting the supercharging pressure in an inlet pipe which is varied by a supercharging function, fuel pressure detector for detecting the pressure of fuel to be injected, a comparator for comparing the outputs of said detectors, a fuel pressure regulating electromagnetic valve in a first pressure regulator adapted to be opened and closed in accordance with the output of said comparator to control said fuel pressure, and fuel injection valve means for injecting fuel in accordance with said regulated fuel pressure.
Claim 2
Dependent Claim
93 words
A supercharge-type fuel injection control system comprising a supercharging pressure detector for detecting the supercharging pressure in an inlet pipe which is varied by a supercharging function, fuel pressure detector for detecting the pressure of fuel to be injected, a comparator for comparing the outputs of said detectors, a fuel pressure regulating electromagnetic valve in a first pressure regulator adapted to be opened and closed in accordance with the output of said comparator to control said fuel pressure, and fuel injection valve means for injecting fuel in accordance with said regulated fuel pressure.
Claim 3
Dependent Claim
45 words
A supercharge-type fuel injection control system according to claim 1 further comprising a second mechanical-type pressure regulator comprising a spring and a pressure regulator valve and provided in parallel with said first pressure regulator to control variation of the fuel pressure below a predetermined value.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |