US4724816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control device for internal combustion engine
Assignee: Mitsubishi Electric Corp
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Filing: 1987-04-29
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Granted: 1988-02-16
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Expires: 2007-04-29
Abstract
Abstract Each of fuel injectors associated with respective cylinders of an internal combustion engine is driven several times for each air-intake with narrow drive pulses during the engine at low temperature is in a starting stage.
Inventors
- 👤 Yoshiaki Kanno
- 👤 Katsuya Nakamoto
- 👤 Jiro Sumitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/20; F02D41/30; F02D41/32; F02D41/34; F02D41/345; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/064; F02D41/36; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
In a fuel control device for an internal combustion engine, including an intake air detecting means for detecting an amount of intake-air and control means for supplying drive pulse signals to fuel injectors for respective cylinders of said engine sequentially, said drive pulse signals having width corresponding to an output of said intake air detecting means, an improvement comprising means responsive to said drive pulses having width larger than a predetermined value for driving each of said fuel injectors several times for each air-intake with drive pulses having narrower width.
Claim 2
Dependent Claim
90 words
In a fuel control device for an internal combustion engine, including an intake air detecting means for detecting an amount of intake-air and control means for supplying drive pulse signals to fuel injectors for respective cylinders of said engine sequentially, said drive pulse signals having width corresponding to an output of said intake air detecting means, an improvement comprising means responsive to said drive pulses having width larger than a predetermined value for driving each of said fuel injectors several times for each air-intake with drive pulses having narrower width.
Claim 3
Dependent Claim
26 words
The improvement as claimed in claim 1, wherein said means responsive to said drive pulses is actuated only when said engine is in a starting stage.
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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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |