JPS57212346A - Air-fuel ratio control system - Google Patents
Air-fuel ratio control systemInfo
- Publication number
- JPS57212346A JPS57212346A JP9723481A JP9723481A JPS57212346A JP S57212346 A JPS57212346 A JP S57212346A JP 9723481 A JP9723481 A JP 9723481A JP 9723481 A JP9723481 A JP 9723481A JP S57212346 A JPS57212346 A JP S57212346A
- Authority
- JP
- Japan
- Prior art keywords
- senser
- output
- circuit
- increased
- impressed
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1494—Control of sensor heater
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE:To prevent the malfunction of a senser and increase the durability of the system by a method wherein an electric current supplied to the senser is increased when the load is high and the output of an oxygen senser is less than a reference value and if the output is not increased, an impressing voltage for the heater of the senser is increased. CONSTITUTION:A comparator 28 supplies a H output to an AND circuit 29 when an oxygen density detecting signal S, outputted from the senser 4a, has become less than the standard value Vr. The AND circuit 29 obtains the coincidence between the output of the comparator 28 and the high exhaust gas temperature detecting signal Qb of a control circuit 18, and supplies the output thereof to an electric current supplying circuit 27 to increase the current supplied to the senser 4a. When the output of the circuit 29 is continued for a period of time longer than the delay time of a delay circuit 30, a switch 31 is closed and a high voltage same as that impressed upon a low load is impressed to the heater 11 to rise the temperature of the senser 4a. According to this method, carbon adhered to the surface of the senser 4a may be removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9723481A JPS57212346A (en) | 1981-06-23 | 1981-06-23 | Air-fuel ratio control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9723481A JPS57212346A (en) | 1981-06-23 | 1981-06-23 | Air-fuel ratio control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57212346A true JPS57212346A (en) | 1982-12-27 |
Family
ID=14186924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9723481A Pending JPS57212346A (en) | 1981-06-23 | 1981-06-23 | Air-fuel ratio control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57212346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59103235U (en) * | 1982-12-27 | 1984-07-11 | 本田技研工業株式会社 | Temperature measurement device for internal combustion engines |
-
1981
- 1981-06-23 JP JP9723481A patent/JPS57212346A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59103235U (en) * | 1982-12-27 | 1984-07-11 | 本田技研工業株式会社 | Temperature measurement device for internal combustion engines |
| JPH0240290Y2 (en) * | 1982-12-27 | 1990-10-26 |
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