US4681079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling fuel injection
Assignee: Suzuki Motor Corp
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Filing: 1985-12-23
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Granted: 1987-07-21
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Expires: 2005-12-23
Abstract
Abstract A fuel injection control method for an internal combustion engine includes the steps of monitoring the rotating speed of the engine and the velocity of the vehicle after the engine has been started using starting fuel injection, and performing fuel injection in an ordinary manner without performing starting fuel injection in the case where either of the following conditions is met: (1) the engine rotating speed is above a predetermined rotating speed or (2) the engine rotating speed is less than the predetermined speed and the vehicle velocity is simultaneously above a predetermined velocity.
Inventors
- 👤 Keisuke Kaneta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
179 words
A method of fuel injection control for an internal combustion engine in a vehicle, comprising the steps of: performing starting fuel injection during starting of the engine; and thereafter monitoring the rotating speed of the engine and the velocity of the vehicle, and: A. performing starting fuel injection when the engine speed is less than predetermined speed and the vehicle velocity is simultaneously less than a first predetermined velocity, and then continuing to perform starting fuel injection so long as the engine speed is less than said predetermined speed and said vehicle velocity is simultaneously less than a second predetermined velocity slightly greater than said first predetermined velocity; B. performing fuel injection in an ordinary manner whenever the engine speed is greater than or equal to said predetermined speed; and C. performing fuel injection in an ordinary manner when the vehicle velocity is greater than or equal to said second predetermined velocity, and then continuing to perform fuel injection in an ordinary manner so long as the vehicle velocity is greater than or equal to said first predetermined velocity.
Claim 2
Independent Claim
179 words
A method of fuel injection control for an internal combustion engine in a vehicle, comprising the steps of: performing starting fuel injection during starting of the engine; and thereafter monitoring the rotating speed of the engine and the velocity of the vehicle, and: A. performing starting fuel injection when the engine speed is less than predetermined speed and the vehicle velocity is simultaneously less than a first predetermined velocity, and then continuing to perform starting fuel injection so long as the engine speed is less than said predetermined speed and said vehicle velocity is simultaneously less than a second predetermined velocity slightly greater than said first predetermined velocity; B. performing fuel injection in an ordinary manner whenever the engine speed is greater than or equal to said predetermined speed; and C. performing fuel injection in an ordinary manner when the vehicle velocity is greater than or equal to said second predetermined velocity, and then continuing to perform fuel injection in an ordinary manner so long as the vehicle velocity is greater than or equal to said first predetermined velocity.
Claim 3
Dependent Claim
29 words
A control method according to claim 1, wherein said step of performing starting fuel injection during starting of the engine is carried out when a starter switch is on.
Claim 4
Dependent Claim
17 words
A control method according to claim 1, wherein said first predetermined velocity is slightly greater than zero.
References Cited (Backward Citations)
JPS5061531A
Cited
US4114570A
Cited
US4526153A
Cited
US4478194A
Cited
JPS5963327A
Cited
JPS5970843A
Cited
JPS59196932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |