JPS648332A - Air-fuel ratio controlling method - Google Patents
Air-fuel ratio controlling methodInfo
- Publication number
- JPS648332A JPS648332A JP16272787A JP16272787A JPS648332A JP S648332 A JPS648332 A JP S648332A JP 16272787 A JP16272787 A JP 16272787A JP 16272787 A JP16272787 A JP 16272787A JP S648332 A JPS648332 A JP S648332A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- exhaust pipes
- sensors
- feedback control
- 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.)
- Pending
Links
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE:To maintain the air-fuel ratio of each cylinder at the same ratio by providing the cylinder groups of an engine with oxygen sensors respectively and arranging auxiliary sensors, in the case where the air-fuel ratio feedback control is performed independently each other, and correcting each air-fuel ratio feedback control. CONSTITUTION:An engine is provided with a plurality of cylinder groups 1 and 2 composed of a plurality of cylinders. And the exhaust system of each of the cylinder groups 1 and 2 is composed of multiple exhaust pipes 35 and 45, catalytic converters 64 and 65, exhaust pipes 66 and 67 and so on. The multiple exhaust pipes 35 and 45 are provided with oxygen sensors 61 and 72 respectively, and each detected signal of these sensors will be input in an electronic controller 10. In this constitution a section 68 collecting the exhaust pipes 66 and 67 is provided in their downstream courses. And the collecting section 68 is provided with an auxiliary oxygen sensor 75 for inputting also the detected signals by this sensor 75 in the controller 10. Based on these signals, the correction factor for air-fuel feedback control is further corrected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16272787A JPS648332A (en) | 1987-06-30 | 1987-06-30 | Air-fuel ratio controlling method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16272787A JPS648332A (en) | 1987-06-30 | 1987-06-30 | Air-fuel ratio controlling method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648332A true JPS648332A (en) | 1989-01-12 |
Family
ID=15760125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16272787A Pending JPS648332A (en) | 1987-06-30 | 1987-06-30 | Air-fuel ratio controlling method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648332A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5228287A (en) * | 1991-06-28 | 1993-07-20 | Mazda Motor Corporation | Exhaust system for internal combustion engine |
US5233829A (en) * | 1991-07-23 | 1993-08-10 | Mazda Motor Corporation | Exhaust system for internal combustion engine |
US5247793A (en) * | 1991-03-28 | 1993-09-28 | Mazda Motor Corporation | Exhaust purification system for multiple cylinder engines |
US5279114A (en) * | 1991-12-27 | 1994-01-18 | Nippondenso Co., Ltd. | Apparatus for detecting deterioration of catalyst of internal combustion engine |
JPH0618639U (en) * | 1992-08-17 | 1994-03-11 | 日本電子機器株式会社 | Air-fuel ratio controller for internal combustion engine |
US5377484A (en) * | 1992-12-09 | 1995-01-03 | Toyota Jidosha Kabushiki Kaisha | Device for detecting deterioration of a catalytic converter for an engine |
US5417058A (en) * | 1992-09-30 | 1995-05-23 | Toyota Jidosha Kabushiki Kaisha | Device for detecting deterioration of a catalytic converter for an engine |
US5570574A (en) * | 1993-12-03 | 1996-11-05 | Nippondenso Co., Ltd. | Air-fuel ratio control system for internal combustion engine |
DE19503852C2 (en) * | 1994-02-09 | 2000-01-27 | Fuji Heavy Ind Ltd | Air-fuel ratio control device and method for controlling the air-fuel ratio of an engine |
DE19549633C2 (en) * | 1994-02-09 | 2002-06-27 | Fuji Heavy Ind Ltd | Air=fuel ratio controller for catalyser engine vehicle |
-
1987
- 1987-06-30 JP JP16272787A patent/JPS648332A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5247793A (en) * | 1991-03-28 | 1993-09-28 | Mazda Motor Corporation | Exhaust purification system for multiple cylinder engines |
US5228287A (en) * | 1991-06-28 | 1993-07-20 | Mazda Motor Corporation | Exhaust system for internal combustion engine |
US5233829A (en) * | 1991-07-23 | 1993-08-10 | Mazda Motor Corporation | Exhaust system for internal combustion engine |
US5279114A (en) * | 1991-12-27 | 1994-01-18 | Nippondenso Co., Ltd. | Apparatus for detecting deterioration of catalyst of internal combustion engine |
JPH0618639U (en) * | 1992-08-17 | 1994-03-11 | 日本電子機器株式会社 | Air-fuel ratio controller for internal combustion engine |
US5417058A (en) * | 1992-09-30 | 1995-05-23 | Toyota Jidosha Kabushiki Kaisha | Device for detecting deterioration of a catalytic converter for an engine |
US5377484A (en) * | 1992-12-09 | 1995-01-03 | Toyota Jidosha Kabushiki Kaisha | Device for detecting deterioration of a catalytic converter for an engine |
US5570574A (en) * | 1993-12-03 | 1996-11-05 | Nippondenso Co., Ltd. | Air-fuel ratio control system for internal combustion engine |
DE19503852C2 (en) * | 1994-02-09 | 2000-01-27 | Fuji Heavy Ind Ltd | Air-fuel ratio control device and method for controlling the air-fuel ratio of an engine |
DE19549633C2 (en) * | 1994-02-09 | 2002-06-27 | Fuji Heavy Ind Ltd | Air=fuel ratio controller for catalyser engine vehicle |
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