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US4573443A
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Non-synchronous injection acceleration control for a multicylinder internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1985-05-16
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Granted: 1986-03-04
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Expires: 2005-05-16
Abstract
Abstract An apparatus for controlling fuel injection in a multicylinder internal combustion engine, wherein fuel injectors for each cylinder are simultaneously operated synchronous with crank angles. The amount of injection is controlled by signals from an air flow meter. The apparatus includes a system operating, nonsynchronous with crank angles, the injectors when the engine is accelerated. The amount of nonsynchronous fuel injection is controlled in accordance with the position of the nonsynchronous injection (i.e., occurrence of acceleration) between adjacent synchronous injections.
Inventors
- 👤 Haruo Watanabe
- 👤 Kazuo Nakano
- 👤 Akito Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:57
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/10; F02D41/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A fuel-injection controlled internal combustion engine, comprising: an engine body having a plurality of cylinders; an intake line for introducing intake air into said engine body; an exhaust line for removing exhaust gas from said engine body; injector means for controllably injecting fuel into said intake line; air flow detecting means for detecting an amount of air flowing through said intake line into said engine body and providing signals representative of said detected amount; synchronous means for controlling said injector means synchronously with predetermined crank angles to cause fuel to be injected; means for detecting the occurrence of a wide open throttle acceleration condition of said engine; acceleration start time determining means for determining the start time of acceleration relative to the time occurrence of two prior and post consecutive synchronous fuel injections, in accordance with one of a detected wide open throttle acceleration condition and a throttle-position indicated acceleration condition; and acceleration pulse means, responsive to said detected acceleration conditions, for operating said injector means to commence acceleration pulse fuel injections with said detected acceleration conditions, the width of said acceleration pulse fuel injections being determined in accordance with said start time occurrence of acceleration determined by said acceleration start time determining means.
Claim 2
Dependent Claim
204 words
A fuel-injection controlled internal combustion engine, comprising: an engine body having a plurality of cylinders; an intake line for introducing intake air into said engine body; an exhaust line for removing exhaust gas from said engine body; injector means for controllably injecting fuel into said intake line; air flow detecting means for detecting an amount of air flowing through said intake line into said engine body and providing signals representative of said detected amount; synchronous means for controlling said injector means synchronously with predetermined crank angles to cause fuel to be injected; means for detecting the occurrence of a wide open throttle acceleration condition of said engine; acceleration start time determining means for determining the start time of acceleration relative to the time occurrence of two prior and post consecutive synchronous fuel injections, in accordance with one of a detected wide open throttle acceleration condition and a throttle-position indicated acceleration condition; and acceleration pulse means, responsive to said detected acceleration conditions, for operating said injector means to commence acceleration pulse fuel injections with said detected acceleration conditions, the width of said acceleration pulse fuel injections being determined in accordance with said start time occurrence of acceleration determined by said acceleration start time determining means.
Claim 3
Dependent Claim
55 words
A combustion engine according to claim 1, wherein said acceleration pulse means comprises means for calculating, in accordance with said determined start time of acceleration, said width of said acceleration pulse fuel injections and means for controlling said injector means to inject fuel according to said calculated width beginning at the time of detected acceleration.
Claim 4
Dependent Claim
67 words
A combustion engine according to claim 2, wherein said calculating means comprise first calculation means for calculating said width of acceleration pulse fuel injections whenever the detected start time is relatively large till the occurrence of a synchronous injection and second calculation means for calculating said width of acceleration pulse fuel injections whenever the detected start time is relatively small till the occurrence of a synchronous injection.
Claim 5
Dependent Claim
30 words
A combustion engine according to claim 3, wherein said second calculating means comprises a means for multiplying a predetermined constant value by a value calculated by said first calculation means.
Claim 6
Dependent Claim
108 words
An internal combustion engine according to claim 1, wherein said acceleration start time determining means comprises a means for discriminating whether occurrence of said acceleration pulse fuel injection is effected at a time relatively near the time occurrence of a synchronous injection, a means for increasing the width of an acceleration pulse fuel injection whenever the time occurrence of an acceleration pulse fuel injection is relatively near the time occurrence of a synchronous injection and a means for decreasing the width of an acceleration pulse feed injection whenever the time occurrence of an acceleration pulse fuel injection is not relatively near the time occurrence of a synchronous injection.
Claim 7
Dependent Claim
72 words
An internal combustion engine according to claim 5, wherein said discriminating means comprises a means for determining whether an acceleration pulse fuel injection is effected after a preceding synchronous injection within a time which is smaller than a predetermined delay, and for determining whether an acceleration pulse fuel injection is effected after a preceding synchronous injection within a time which is less than half of the time between two consecutive synchronous injections.
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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) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |