EP0757167A3 - Air/fuel ratio control method for a lean burn combustion engine - Google Patents
Air/fuel ratio control method for a lean burn combustion engine Download PDFInfo
- Publication number
- EP0757167A3 EP0757167A3 EP96112294A EP96112294A EP0757167A3 EP 0757167 A3 EP0757167 A3 EP 0757167A3 EP 96112294 A EP96112294 A EP 96112294A EP 96112294 A EP96112294 A EP 96112294A EP 0757167 A3 EP0757167 A3 EP 0757167A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- air
- ratio
- value
- injecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
- F02D41/1488—Inhibiting the regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2454—Learning of the air-fuel ratio control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Disclosed herein is a n air/fuel ratio control method controlling air/fuel ratio
for vehicles which have thin combustion engines. The air/fuel ratio control
method executes the feedback control the fuel supply of the engines by an
ECU(Electric Control Unit) based on the information from the sensors.
During the theoretical air/fuel ratio combustion, the fuel injecting value is set
by the amount of multiplying the basic injecting amount by the adaption value
set up previously and by detecting the oxygen amount in the waste gas with
the λ sensor and the feedback control process is repeated but the aforesaid
feedback value will be counted and stored in the ECU's RAM; as the result
of this procedure, the next injecting value will be decided; and during the thin
fuel/air ratio combustion, after the adaption value stored in the aforesaid RAM
is multiplied by the basic injecting amount at the thin fuel/air ratio, the result
value decides the fuel injecting amount, and this procedure lets the ratio being
closed to the desired fuel/air ratio without the feedback control which is
governed by the λ sensor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR9523210 | 1995-07-31 | ||
KR1019950023210A KR100187974B1 (en) | 1995-07-31 | 1995-07-31 | Air fuel ratio control method of lean burn engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0757167A2 EP0757167A2 (en) | 1997-02-05 |
EP0757167A3 true EP0757167A3 (en) | 1998-04-08 |
Family
ID=19422266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96112294A Withdrawn EP0757167A3 (en) | 1995-07-31 | 1996-07-30 | Air/fuel ratio control method for a lean burn combustion engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0757167A3 (en) |
KR (1) | KR100187974B1 (en) |
AU (1) | AU6080896A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100435637B1 (en) * | 1997-12-16 | 2004-09-04 | 현대자동차주식회사 | Air fuel ratio control method in vehicle mounted with lean burn engine to promote stable maintenance of working of engine |
KR100422619B1 (en) * | 1997-12-31 | 2004-06-16 | 현대자동차주식회사 | Fuel injection control method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445481A (en) * | 1980-12-23 | 1984-05-01 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method for controlling the air-fuel ratio of an internal combustion engine |
US4669439A (en) * | 1984-09-10 | 1987-06-02 | Mazda Motor Corporation | Air-to-fuel ratio control systems for internal combustion engines |
US4677559A (en) * | 1984-01-30 | 1987-06-30 | U.S. Philips Corporation | Control arrangement for a combustion engine |
-
1995
- 1995-07-31 KR KR1019950023210A patent/KR100187974B1/en not_active IP Right Cessation
-
1996
- 1996-07-30 EP EP96112294A patent/EP0757167A3/en not_active Withdrawn
- 1996-07-30 AU AU60808/96A patent/AU6080896A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445481A (en) * | 1980-12-23 | 1984-05-01 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method for controlling the air-fuel ratio of an internal combustion engine |
US4677559A (en) * | 1984-01-30 | 1987-06-30 | U.S. Philips Corporation | Control arrangement for a combustion engine |
US4669439A (en) * | 1984-09-10 | 1987-06-02 | Mazda Motor Corporation | Air-to-fuel ratio control systems for internal combustion engines |
Also Published As
Publication number | Publication date |
---|---|
KR970006824A (en) | 1997-02-21 |
AU6080896A (en) | 1997-02-06 |
KR100187974B1 (en) | 1999-06-01 |
EP0757167A2 (en) | 1997-02-05 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
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PUAL | Search report despatched |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19981209 |