US5184589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection control system
Assignee: Yamaha Motor Co Ltd
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Filing: 1991-11-13
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Granted: 1993-02-09
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Expires: 2011-11-13
Abstract
Abstract An apparatus for controlling the speed of a direct fuel injected, scavenged two stroke engine comprises engine speed sensing means for determining the speed of revolution of an engine and means for sensing the degree to which the throttle. A comparing device produces a signal corresponding to the difference between the engine speed sensed by the engine speed sensing means and a predetermined engine speed corresponding to the degree of throttle opening. An control device adjusts an engine running parameter based on this difference.
Inventors
- 👤 Kimihiro Nonaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:43
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02B; F02B61/00; F02B61/04; F02B61/045; F02D31/00; F02D31/001; F02D31/007; F02D41/30; F02D41/32; F02D41/34; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; F02B23/00; F02B23/08; F02B23/10; F02B23/101; F02D2400/00; F02D2400/04; F02F; F02F3/00; F02F3/26; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
115 words
An apparatus for controlling the speed of a direct fuel injected, scavenged two stroke engine having a throttle comprising: a first sensor for sensing the degree to which the throttle is open; means for sensing the speed of the engine; means for determining a desired engine speed based on the degree to which the throttle is open; means for producing a signal corresponding to the difference between the engine speed sensed by said engine speed sensing means and said predetermined engine speed; and a control device for adjusting at least one engine running parameter based on said difference to reduce said difference, wherein said control device adjusts a fuel injection timing to reduce said difference.
Claim 2
Independent Claim
115 words
An apparatus for controlling the speed of a direct fuel injected, scavenged two stroke engine having a throttle comprising: a first sensor for sensing the degree to which the throttle is open; means for sensing the speed of the engine; means for determining a desired engine speed based on the degree to which the throttle is open; means for producing a signal corresponding to the difference between the engine speed sensed by said engine speed sensing means and said predetermined engine speed; and a control device for adjusting at least one engine running parameter based on said difference to reduce said difference, wherein said control device adjusts a fuel injection timing to reduce said difference.
Claim 3
Dependent Claim
37 words
An apparatus according to claim 1, wherein fuel injection timing is advanced when the engine speed is lower than the predetermined engine speed, and is delayed when the engine speed is greater than the predetermined engine speed.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 1, wherein said control device adjusts the amount of fuel injected to the cylinder to reduce said difference.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 1, wherein said control device adjusts the spark timing to reduce said difference.
Claim 6
Dependent Claim
20 words
An apparatus according to claim 1, wherein the means for sensing the speed of the engine includes a pulser coil.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 1, wherein the control device includes an injection timing computer.
Claim 8
Independent Claim
97 words
A method for controlling the speed of a direct fuel injected, scavenged two stroke engine comprising the steps of: sensing the engine speed; sensing the degree to which the throttle is open; producing a desired engine speed based on the degree to which the throttle is open; comparing the engine speed sensed to said predetermined engine speed to determine the difference between the sensed engine speed and the predetermined engine speed; and adjusting at least one engine running parameter based on said difference to reduce said difference, wherein a spark timing is adjusted to reduce said difference.
Claim 9
Independent Claim
97 words
A method for controlling the speed of a direct fuel injected, scavenged two stroke engine comprising the steps of: sensing the engine speed; sensing the degree to which the throttle is open; producing a desired engine speed based on the degree to which the throttle is open; comparing the engine speed sensed to said predetermined engine speed to determine the difference between the sensed engine speed and the predetermined engine speed; and adjusting at least one engine running parameter based on said difference to reduce said difference, wherein a spark timing is adjusted to reduce said difference.
Claim 10
Dependent Claim
17 words
A method according to claim 7, wherein a fuel injection timing is adjusted to reduce said difference.
Claim 11
Dependent Claim
37 words
A method according to claim 8, wherein fuel injection timing is advanced when the engine speed is lower than the predetermined engine speed, and is delayed when the engine speed is greater than the predetermined engine speed.
Claim 12
Dependent Claim
21 words
A method according to claim 8, wherein an amount of fuel injected to the cylinder is adjusted to reduce said difference.
Claim 13
Independent Claim
70 words
An apparatus for controlling the speed of a direct fuel injected, scavenged two stroke engine comprising: means for sensing the engine temperature; means for producing a desired engine temperature; a comparing device for producing a signal corresponding to the difference between the engine temperature sensed by said engine temperature sensing means and said desired engine temperature; and a control device for adjusting an engine running parameter based on said difference.
Claim 14
Independent Claim
70 words
An apparatus for controlling the speed of a direct fuel injected, scavenged two stroke engine comprising: means for sensing the engine temperature; means for producing a desired engine temperature; a comparing device for producing a signal corresponding to the difference between the engine temperature sensed by said engine temperature sensing means and said desired engine temperature; and a control device for adjusting an engine running parameter based on said difference.
Claim 15
Dependent Claim
16 words
An apparatus according to claim 11, wherein said engine running parameter is the fuel injection timing.
Claim 16
Dependent Claim
37 words
An apparatus according to claim 12, wherein fuel injection timing is advanced when the engine temperature is lower than the predetermined engine temperature, and is delayed when the engine temperature is greater than the predetermined engine temperature.
Claim 17
Dependent Claim
20 words
An apparatus according to claim 11, wherein said engine running parameter is the amount of fuel injected to the cylinder.
Claim 18
Dependent Claim
15 words
An apparatus according to claim 11, wherein said engine running parameter is the spark timing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-09 | 1996-08-10 | 1997-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-09 | 2000-08-10 | 2001-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-09 | 2004-08-10 | 2005-02-09 | $7700.00 | Window Closed / Lapsed |