US5794585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder injection fuel control device for an internal-combustion engine
Assignee: Mitsubishi Electric Corp
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Filing: 1997-10-24
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Granted: 1998-08-18
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Expires: 2017-10-24
Abstract
Abstract A cylinder injection fuel control device for an internal-combustion engine provides a proper amount of fuel at the time of transient operation by reflecting the most up-to-date operational state in control. The cylinder injection fuel control device has a fuel injection valve for directly injecting fuel into each cylinder of an internal-combustion engine and it supplies the amount of fuel required for a single stroke of each cylinder by applying, to each fuel injection valve, an injection signal of a pulse width corresponding to the driving time of each fuel injection valve; wherein the injection signal applied in a single stroke of each cylinder is divided into three pulses, and the amount of fuel required for a single stroke is divided into three portions. A first injection signal and a second injection signal are respectively applied during a suction stroke, and a third injection signal is applies during a compression stroke to the fuel injection valve of each cylinder, and the amount of fuel supplied in response to the second injection signal is corrected in accordance with the operational state of the internal-combustion engine.
Inventors
- 👤 Shiro Yonezawa
- 👤 Hirofumi Ohuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:38
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3023; F02D41/3029; F02D41/38; F02D41/40; F02D41/402; F02D2041/389; F02D2250/00; F02D2250/12; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A cylinder injection fuel control device for an internal-combustion engine which has a fuel injection valve for directly injecting fuel into each cylinder of an internal-combustion engine and which supplies the amount of fuel required for a single stroke of each cylinder by applying, to each fuel injection valve, an injection signal of a pulse width corresponding to the driving time of each fuel injection valve; wherein said injection signal applied for a single stroke of each cylinder is divided into three pulses, and the amount of fuel required for a single stroke is divided into three portions; a first injection signal and a second injection signal are respectively applied during a suction stroke, and a third injection signal is applies during a compression stroke to said fuel injection valve of said each cylinder; and the amount of fuel supplied in response to said second injection signal is corrected in accordance with the operational state of said internal-combustion engine.
Claim 2
Dependent Claim
159 words
A cylinder injection fuel control device for an internal-combustion engine which has a fuel injection valve for directly injecting fuel into each cylinder of an internal-combustion engine and which supplies the amount of fuel required for a single stroke of each cylinder by applying, to each fuel injection valve, an injection signal of a pulse width corresponding to the driving time of each fuel injection valve; wherein said injection signal applied for a single stroke of each cylinder is divided into three pulses, and the amount of fuel required for a single stroke is divided into three portions; a first injection signal and a second injection signal are respectively applied during a suction stroke, and a third injection signal is applies during a compression stroke to said fuel injection valve of said each cylinder; and the amount of fuel supplied in response to said second injection signal is corrected in accordance with the operational state of said internal-combustion engine.
Claim 3
Dependent Claim
33 words
A cylinder injection fuel control device for an internal-combustion engine according to claim 1, wherein the amount of fuel supplied in response to said third injection signal is set to a fixed value.
Claim 4
Dependent Claim
139 words
A cylinder injection fuel control device for an internal-combustion engine which has a fuel injection valve for directly injecting fuel into each cylinder of an internal-combustion engine and which supplies the amount of fuel required for a single stroke of each cylinder by applying, to each fuel injection valve, an injection signal of a pulse width corresponding to the driving time of each fuel injection valve; wherein said injection signal applied for a single stroke of each cylinder is divided into three pulses, and the amount of fuel required for a single stroke is divided into three portions; and a first injection signal is applied in an exhaust stroke, a second injection signal is applied in a suction stroke, and a third injection signal is applied in a compression stroke to said fuel injection valve of said each cylinder.
Claim 5
Dependent Claim
139 words
A cylinder injection fuel control device for an internal-combustion engine which has a fuel injection valve for directly injecting fuel into each cylinder of an internal-combustion engine and which supplies the amount of fuel required for a single stroke of each cylinder by applying, to each fuel injection valve, an injection signal of a pulse width corresponding to the driving time of each fuel injection valve; wherein said injection signal applied for a single stroke of each cylinder is divided into three pulses, and the amount of fuel required for a single stroke is divided into three portions; and a first injection signal is applied in an exhaust stroke, a second injection signal is applied in a suction stroke, and a third injection signal is applied in a compression stroke to said fuel injection valve of said each cylinder.
Claim 6
Dependent Claim
38 words
A cylinder injection fuel control device for an internal-combustion engine according to claim 3, wherein the amount of fuel supplied in response to said second injection signal is corrected according to the operational state of said internal-combustion engine.
Claim 7
Dependent Claim
33 words
A cylinder injection fuel control device for an internal-combustion engine according to claim 3, wherein the amount of fuel supplied in response to said third injection signal is set to a fixed value.
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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) | 2001-08-17 | 2002-02-16 | 2002-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-17 | 2006-02-16 | 2006-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-17 | 2010-02-16 | 2010-08-18 | $7700.00 | Window Closed / Lapsed |