JPS6483835A - Air-fuel controller for internal combustion engine - Google Patents
Air-fuel controller for internal combustion engineInfo
- Publication number
- JPS6483835A JPS6483835A JP62238958A JP23895887A JPS6483835A JP S6483835 A JPS6483835 A JP S6483835A JP 62238958 A JP62238958 A JP 62238958A JP 23895887 A JP23895887 A JP 23895887A JP S6483835 A JPS6483835 A JP S6483835A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- air
- feedback control
- layer
- oxygen sensor
- 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 CO, HC and NOx discharges by setting a feedback control constant in the fuel decrement direction to be a relatively large value, 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 catylic layer (catalytic oxidation layer) 4, a NOx reducing catalytic layer 5 and a protective layer 6 successively on an outer surface of a ceramic tube 1 installing each of electrodes 2, 3 on both inner and outer surface is used. A fuel injection valve 5 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 decrement direction is made larger than the feedback control constant in the fuel increment direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238958A JPH0786333B2 (en) | 1987-09-25 | 1987-09-25 | Air-fuel ratio controller for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238958A JPH0786333B2 (en) | 1987-09-25 | 1987-09-25 | Air-fuel ratio controller for internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6483835A true JPS6483835A (en) | 1989-03-29 |
JPH0786333B2 JPH0786333B2 (en) | 1995-09-20 |
Family
ID=17037827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62238958A Expired - Lifetime JPH0786333B2 (en) | 1987-09-25 | 1987-09-25 | Air-fuel ratio controller for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0786333B2 (en) |
-
1987
- 1987-09-25 JP JP62238958A patent/JPH0786333B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0786333B2 (en) | 1995-09-20 |
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