Patent US2812121A successfully refreshed from Google Patents.
Patent US4633839A successfully refreshed from Google Patents.
US4633839A
Expired / Lapsed
US
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Method for controlling the supply of fuel for an internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1985-03-25
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Granted: 1987-01-06
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Expires: 2005-03-25
Abstract
Abstract A fuel supply of an internal combustion engine is controlled by sampling a vacuum level within an intake pipe of the engine and a value corresponding to the engine rotational speed at predetermined sampling intervals, subsequently correcting a latest sampled value P BAn of the vacuum level with a latest sampled value M en of the value corresponding to the engine rotational speed to produce a corrected value P BA , and then determining fuel supply amount in accordance with the corrected value P BA . By determining the fuel supply amount in this way, hunting of the engine rotational speed especially during idling operation of the engine is prevented.
Inventors
- 👤 Akimasa Yasuoka
- 👤 Takahiro Iwata
- 👤 Takeo Kiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:52
CPC Classifications
F; F02; F02D; F02D31/00; F02D31/001; F02D41/00; F02D41/02; F02D41/04; F02D41/08; F02D41/14; F02D41/16; F02D41/30; F02D41/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A method for controlling fuel supply of an internal combustion engine having a throttle valve, according to a pressure within an intake pipe, downstream of the throttle valve, comprising the sequential steps of: sampling said pressure within the intake pipe and a value corresponding to engine rotational speed at predetermined time intervals; correcting a latest sample value P BAn of said pressure within the intake pipe by a ratio between a latest sampled value M en corresponding to engine rotational speed and a value corresponding to a predetermined idle speed of the engine, to produce a corrected value P BA ; and determining fuel supply amount according to said corrected value P BA .
Claim 2
Independent Claim
114 words
A method for controlling fuel supply of an internal combustion engine having a throttle valve, according to a pressure within an intake pipe, downstream of the throttle valve, comprising the sequential steps of: sampling said pressure within the intake pipe and a value corresponding to engine rotational speed at predetermined time intervals; correcting a latest sample value P BAn of said pressure within the intake pipe by a ratio between a latest sampled value M en corresponding to engine rotational speed and a value corresponding to a predetermined idle speed of the engine, to produce a corrected value P BA ; and determining fuel supply amount according to said corrected value P BA .
Claim 3
Dependent Claim
148 words
A method as claimed in claim 1, wherein said value corresponding to engine rotational speed is an inverted value of the engine rotational speed, and said correcting step comprises the sequential steps of: dividing said sampled value Men of the inverted value of the engine rotational speed by an inverted value M eIDLE of a predetermined idling speed of the engine and substracting a value 1 from the quotient, to produce a value M en /M eIDLE -1; multiplying a predetermined correction coefficient α representative of a degree of correction to said value of M en /M eIDLE -1 and adding a value 1 to the product, to produce a value α(M en /M eIDLE -1)+1; and multiplying said latest sampled value P BAn of the pressure within the intake pipe with said value of α(M en /M eIDLE -1)+1, to produce said corrected value P BA .
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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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |