Patent US4892078A successfully refreshed from Google Patents.
US4892078A
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Fuel supply quantity control method for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1988-09-08
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Granted: 1990-01-09
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Expires: 2008-09-08
Abstract
Abstract To control the quantity of fuel supplied to an I.C. engine, a sensor generates an exhaust gas component concentration signal. If the present fuel supply quantity does not exceed a reference quantity, the fuel supply is set according to engine operation parameters. If the preset quantity is greater than the reference quantity for a predetermined reference time, the fuel supply is set without regard to the signal. The reference time is changed as a function of engine temperature.
Inventors
- 👤 Yoji Fukutomi
- 👤 Takeshi Fukuzawa
- 👤 Keisuke Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:43
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1477; F02D41/1479; F02D41/1486; F02D41/1488
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
In a method of controlling a fuel supply quantity with use of a fuel supply device in an internal combustion engine having an exhaust gas component concentration sensor for generating an exhaust gas component signal, the improvement comprising the steps of (a) setting the fuel supply quantity according to engine operation parameters including said exhaust gas component signal so far as a preset fuel supply quantity is not grater than a reference quantity; (b) setting the fuel supply quantity irrespective of said exhaust gas component signal when said preset fuel supply quantity continues to be greater than said reference quantity for at least a reference time; and (c) changing said reference time according to engine temperature.
Claim 2
Dependent Claim
116 words
In a method of controlling a fuel supply quantity with use of a fuel supply device in an internal combustion engine having an exhaust gas component concentration sensor for generating an exhaust gas component signal, the improvement comprising the steps of (a) setting the fuel supply quantity according to engine operation parameters including said exhaust gas component signal so far as a preset fuel supply quantity is not grater than a reference quantity; (b) setting the fuel supply quantity irrespective of said exhaust gas component signal when said preset fuel supply quantity continues to be greater than said reference quantity for at least a reference time; and (c) changing said reference time according to engine temperature.
Claim 3
Dependent Claim
50 words
The improvement as claimed in claim 1, wherein said fuel supply device comprises a fuel injection supply device, further comprising the step of determining whether or not a preset fuel injection time corresponding to said preset fuel supply quantity is greater than a reference value corresponding to said reference quantity.
Claim 4
Dependent Claim
22 words
The improvement as claimed in claim 1, wherein said reference time is set to be short when said engine temperature is low.
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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |