JPS6466441A - Air-fuel ratio control device of internal combustion engine - Google Patents
Air-fuel ratio control device of internal combustion engineInfo
- Publication number
- JPS6466441A JPS6466441A JP22119987A JP22119987A JPS6466441A JP S6466441 A JPS6466441 A JP S6466441A JP 22119987 A JP22119987 A JP 22119987A JP 22119987 A JP22119987 A JP 22119987A JP S6466441 A JPS6466441 A JP S6466441A
- Authority
- JP
- Japan
- Prior art keywords
- self
- value
- excited
- air
- 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 enhance the purification performance of three way catalyst by varying the central value of a self-excited control waveform having the specified cycle and amplitude according to the average value of the output of the O2 sensor provided downstream from the catalyst and controlling an air-fuel ratio according to the self-excited control waveform. CONSTITUTION:The value detected by an air flow meter 3, crank angle sensors 5 and 6, idle switch 16, the O2 sensor 14 provided in the lower course of a three way catalyst flow 12 and so on are input in a control circuit 10 to operate and control the opening time of a fuel injection valve 7. The control circuit 10 operates the average value of the output of an O2 sensor 14 on the down- stream side and calculates the central value of a self-excited control waveform so that the central value is made small when average value is large. And when self-excited conditions are settled except for fuel increase value for warming up during the start-up of an engine and fuel cut during power loading, the skip control of an air-fuel ratio correction factor is performed according to the self-excited control waveform having the specified cycle and amplitude and on the center of the calculated central value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22119987A JPS6466441A (en) | 1987-09-05 | 1987-09-05 | Air-fuel ratio control device of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22119987A JPS6466441A (en) | 1987-09-05 | 1987-09-05 | Air-fuel ratio control device of internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6466441A true JPS6466441A (en) | 1989-03-13 |
Family
ID=16763023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22119987A Pending JPS6466441A (en) | 1987-09-05 | 1987-09-05 | Air-fuel ratio control device of internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6466441A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070692A (en) * | 1989-12-29 | 1991-12-10 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system having single air-fuel ratio sensor downstream of or within three-way catalyst converter |
US5070693A (en) * | 1989-11-21 | 1991-12-10 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system having single air-fuel ratio sensor downstream of or within three-way catalyst converter |
US5185565A (en) * | 1990-10-01 | 1993-02-09 | Sanyo Electric Co., Ltd. | Charge control apparatus for use with electronic equipment |
JPH0552141A (en) * | 1991-08-23 | 1993-03-02 | Mitsubishi Motors Corp | Air fuel ratio control device for engine |
DE10302126B4 (en) * | 2002-01-22 | 2013-01-10 | Honda Giken Kogyo K.K. | Air / fuel ratio control apparatus and method for an internal combustion engine |
JP2015200188A (en) * | 2014-04-04 | 2015-11-12 | 富士重工業株式会社 | Air-fuel ratio imbalance diagnostic apparatus and air-fuel ratio imbalance diagnostic method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56126648A (en) * | 1980-03-07 | 1981-10-03 | Fuji Heavy Ind Ltd | Air-fuel ratio controlling apparatus |
JPS6453042A (en) * | 1987-08-24 | 1989-03-01 | Mitsubishi Motors Corp | Air-fuel ratio controller for internal combustion engine |
-
1987
- 1987-09-05 JP JP22119987A patent/JPS6466441A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56126648A (en) * | 1980-03-07 | 1981-10-03 | Fuji Heavy Ind Ltd | Air-fuel ratio controlling apparatus |
JPS6453042A (en) * | 1987-08-24 | 1989-03-01 | Mitsubishi Motors Corp | Air-fuel ratio controller for internal combustion engine |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070693A (en) * | 1989-11-21 | 1991-12-10 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system having single air-fuel ratio sensor downstream of or within three-way catalyst converter |
US5070692A (en) * | 1989-12-29 | 1991-12-10 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system having single air-fuel ratio sensor downstream of or within three-way catalyst converter |
US5185565A (en) * | 1990-10-01 | 1993-02-09 | Sanyo Electric Co., Ltd. | Charge control apparatus for use with electronic equipment |
JPH0552141A (en) * | 1991-08-23 | 1993-03-02 | Mitsubishi Motors Corp | Air fuel ratio control device for engine |
DE10302126B4 (en) * | 2002-01-22 | 2013-01-10 | Honda Giken Kogyo K.K. | Air / fuel ratio control apparatus and method for an internal combustion engine |
JP2015200188A (en) * | 2014-04-04 | 2015-11-12 | 富士重工業株式会社 | Air-fuel ratio imbalance diagnostic apparatus and air-fuel ratio imbalance diagnostic method |
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