US5074271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection rate control system for starting two-cycle engine
Assignee: Subaru Corp
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Filing: 1990-10-26
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Granted: 1991-12-24
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Expires: 2010-10-26
Abstract
Abstract Herein disclosed is a fuel injection rate control system for starting a two-cycle engine having a fuel injection valve, which comprises: means for correcting the starting basic fuel injection rate, which is stored in advance in terms of an engine temperature, in accordance with the cranking engine speed at the enging starting time; and means for performing a correction in accordance with the cranking time period, wherein the improvement comprises, as the means for correcting the starting basic fuel injection rate in accordance with the cranking engine speed: first engine speed correction coefficient setting means for setting a first engine speed at a first start of the engine; means for deciding second later starts of the engine; and second engine speed correction coefficient setting means for setting an engine speed correction coefficient smaller than that of the first engine speed correction coefficient setting means when the second and later starts of the engine are decided by the decision means.
Inventors
- 👤 Kazuo Suzuki
- 👤 Tomoyuki Hirose
- 👤 Tsutomu Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:49
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/065; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0606; F02D2400/00; F02D2400/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
A fuel injection rate control system for starting a two-cycle engine having a fuel injection valve, comprising: means for correcting the starting basic fuel injection rate, which is stored in advance in terms of an engine temperature, in accordance with the cranking engine speed at the engine starting time; and means for performing a correction in accordance with the cranking time period, wherein the improvement comprises, as the means for correcting said starting basic fuel injection rate in accordance with the cranking engine speed first engine speed correction coefficient setting means for setting a first engine speed at a first start of the engine; means for deciding second later starts of the engine; and second engine speed correction coefficient setting means for setting as engine speed correction coefficient smaller than that of said first engine speed correction coefficient setting means when the second and later starts of the engine are decided by said decision means.
Claim 2
Dependent Claim
155 words
A fuel injection rate control system for starting a two-cycle engine having a fuel injection valve, comprising: means for correcting the starting basic fuel injection rate, which is stored in advance in terms of an engine temperature, in accordance with the cranking engine speed at the engine starting time; and means for performing a correction in accordance with the cranking time period, wherein the improvement comprises, as the means for correcting said starting basic fuel injection rate in accordance with the cranking engine speed first engine speed correction coefficient setting means for setting a first engine speed at a first start of the engine; means for deciding second later starts of the engine; and second engine speed correction coefficient setting means for setting as engine speed correction coefficient smaller than that of said first engine speed correction coefficient setting means when the second and later starts of the engine are decided by said decision means.
Claim 3
Dependent Claim
67 words
A fuel injection rate control system for starting a two-cycle engine as set forth in claim 1, wherein the first engine speed correction coefficient setting means comprises a first engine speed correction coefficient storage means for preliminarily storing a first engine speed correction coefficient corresponding to cranking engine speed, and a first engine speed correction coefficient retrieving means for retrieving the stored first engine speed correction coefficient.
Claim 4
Dependent Claim
67 words
A fuel injection rate control system for starting a two-cycle engine as set forth in claim 1, wherein the second engine speed correction coefficient setting means comprises a second engine speed correction coefficient storage means for preliminarily storing a second engine speed correction coefficient corresponding to cranking engine speed, and a second engine speed correction coefficient retrieving means for retrieving the stored second engine speed correction coefficient.
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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) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |