JPS6483834A - Air-fuel ratio controller for internal combustion engine - Google Patents
Air-fuel ratio controller for internal combustion engineInfo
- Publication number
- JPS6483834A JPS6483834A JP62238957A JP23895787A JPS6483834A JP S6483834 A JPS6483834 A JP S6483834A JP 62238957 A JP62238957 A JP 62238957A JP 23895787 A JP23895787 A JP 23895787A JP S6483834 A JPS6483834 A JP S6483834A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel
- exhaust
- nox
- fuel ratio
- 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.)
- Granted
Links
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE:To reduce NOx discharge by setting a feedback control constant in the fuel increment direction to be a large value at a driving area where NOx content in the exhaust is high, in a device which controls an air-fuel ratio on the basis of output of an oxygen sensor with a NOx reducing catalyzer. CONSTITUTION:In an exhaust passage 12 of an internal combustion engine 11, there is provided with an oxygen sensor 19 which detects an air-fuel ratio of mixture after detecting exhaust oxygen content, while three-way catalyst 20 is installed at the downstream side. As for the oxygen 19, such a structural one that installs a platinum catalytic layer (catalytic odixation layer) 4, a NOx reducing catalytic layer 5 and a protective layer 6 successively on an outer surface of a ceramic tube 1 provided with each of electrodes 2, 3 on both inner and outer surfaces is used. A fuel injection valve 15 is controlled by a control unit 16 on the basis of output of the oxygen sensor 19, and when air-fuel feedback control takes place, a feedback control constant in the fuel increment direction is made larger than that in the decrement direction in a driving area where NOx content in the exhaust is high.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62238957A JPH0786332B2 (en) | 1987-09-25 | 1987-09-25 | Air-fuel ratio controller for internal combustion engine |
| US07/246,746 US4915080A (en) | 1987-09-22 | 1988-09-20 | Electronic air-fuel ratio control apparatus in internal combustion engine |
| EP88115400A EP0308870B1 (en) | 1987-09-22 | 1988-09-20 | Electronic air-fuel ratio control apparatus in internal combustion engine |
| DE8888115400T DE3870782D1 (en) | 1987-09-22 | 1988-09-20 | ELECTRONIC CONTROL DEVICE FOR THE FUEL-AIR RATIO OF AN INTERNAL COMBUSTION ENGINE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62238957A JPH0786332B2 (en) | 1987-09-25 | 1987-09-25 | Air-fuel ratio controller for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6483834A true JPS6483834A (en) | 1989-03-29 |
| JPH0786332B2 JPH0786332B2 (en) | 1995-09-20 |
Family
ID=17037811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62238957A Expired - Lifetime JPH0786332B2 (en) | 1987-09-22 | 1987-09-25 | Air-fuel ratio controller for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0786332B2 (en) |
-
1987
- 1987-09-25 JP JP62238957A patent/JPH0786332B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0786332B2 (en) | 1995-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5083427A (en) | Apparatus and method to reduce automotive emissions using filter catalyst interactive with uego | |
| EP0799988A3 (en) | Air-fuel ratio control system for internal combustion engines | |
| EP0799985A3 (en) | Air-fuel ratio control system for internal combustion engines | |
| US7716924B2 (en) | Device for purifying exhaust gas of an internal combustion engine | |
| EP1026382A3 (en) | Exhaust gas purification device for an engine and a/f ratio control for early activating a nox trapping catalyst | |
| GB2052108A (en) | System for feedback control of air-fuel mixing ratio in intake system of internal combustion engine | |
| JP2951831B2 (en) | Exhaust gas purification device for internal combustion engine | |
| EP1052393A3 (en) | Air-fuel ratio control apparatus and method of internal combustion engine | |
| JPS6453043A (en) | Air-fuel ratio controller for internal combustion engine | |
| US4364356A (en) | Exhaust emissions control system | |
| US6497846B1 (en) | Exhaust gas purifying system for internal combustion engine | |
| JPS6415448A (en) | Air-fuel ratio control device for internal combustion engine | |
| JPS6483834A (en) | Air-fuel ratio controller for internal combustion engine | |
| JPS6483835A (en) | Air-fuel controller for internal combustion engine | |
| US5582005A (en) | Exhaust arrangement for a gasoline | |
| CA2339260A1 (en) | Engine intake a/f ratio control system in outboard engine system | |
| JPH0219627A (en) | Air-fuel ratio control device | |
| JPS59165852A (en) | Fuel supply device for gas engine | |
| KR970021687A (en) | Control device of internal combustion engine | |
| JPS6460742A (en) | Air-fuel ratio control device for internal combustion engine | |
| JPS5741452A (en) | Exhaust gas purification device for fuel injection type engine | |
| JPS6032357Y2 (en) | Exhaust purification device | |
| JPS6412016A (en) | Alcohol engine | |
| JPS5741451A (en) | Exhaust gas purifying apparatus for fuel injection system engine | |
| JPS57165654A (en) | Control method and device of exhaust gas recirculation in diesel engine |