JPS5677535A - Device for controlling air-fuel ratio of engine - Google Patents
Device for controlling air-fuel ratio of engineInfo
- Publication number
- JPS5677535A JPS5677535A JP15612979A JP15612979A JPS5677535A JP S5677535 A JPS5677535 A JP S5677535A JP 15612979 A JP15612979 A JP 15612979A JP 15612979 A JP15612979 A JP 15612979A JP S5677535 A JPS5677535 A JP S5677535A
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- fuel
- engine
- actuator
- 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
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To prevent air-fuel ratio of an engine from becoming too rich at a high ground or the like, by providing a compensating means which limits the operation of a fuel increasing means when an output signal of an exhaust-gas sensor or an air- fuel ratio controlling signal is produced for a while longer than a predetermined time period to decrease the flow rate of fuel supplied from a fuel metering means.
CONSTITUTION: During ordinary operation of an engine, fuel flow from a fuel metering means 16 is controlled by an actuator 24 in response to a control signal given from an air-fuel ratio controlling circuit 21 on the basis of the output of an exhaust-gas sensor 20, such that the air-fuel ratio becomes equal to the theoretical value. On the other hand, at a high ground, for instance, air-fuel ratio tends to become rich, and it is not possible to adjust the air-fuel ratio to the theoretical value by simply shifting an actuator 15 to "lean" side. In order to overcome the above difficulties, there is provided a compensating means 22 including a detecting circuit 23 capable of detecting, from the output signal of a comparison circuit 25, that the air-fuel ratio is kept rich for a long time. When the above state is detected by the detecting circuit 23, a stopper 24a is projected through operation of an actuator 24 for restricting opening of a power valve 19 which is associated with a fuel increasing means 17.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15612979A JPS5677535A (en) | 1979-11-30 | 1979-11-30 | Device for controlling air-fuel ratio of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15612979A JPS5677535A (en) | 1979-11-30 | 1979-11-30 | Device for controlling air-fuel ratio of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5677535A true JPS5677535A (en) | 1981-06-25 |
Family
ID=15620950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15612979A Pending JPS5677535A (en) | 1979-11-30 | 1979-11-30 | Device for controlling air-fuel ratio of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5677535A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243434A (en) * | 1987-03-31 | 1988-10-11 | Honda Motor Co Ltd | Trouble discriminating method for exhaust component concentration sensor |
-
1979
- 1979-11-30 JP JP15612979A patent/JPS5677535A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243434A (en) * | 1987-03-31 | 1988-10-11 | Honda Motor Co Ltd | Trouble discriminating method for exhaust component concentration sensor |
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