JPS54141928A - Air fuel ratio control circuit - Google Patents
Air fuel ratio control circuitInfo
- Publication number
- JPS54141928A JPS54141928A JP5030178A JP5030178A JPS54141928A JP S54141928 A JPS54141928 A JP S54141928A JP 5030178 A JP5030178 A JP 5030178A JP 5030178 A JP5030178 A JP 5030178A JP S54141928 A JPS54141928 A JP S54141928A
- Authority
- JP
- Japan
- Prior art keywords
- air fuel
- fuel ratio
- predetermined value
- control circuit
- 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
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To prevent the deterioration of an air fuel ratio sensor, by effecting control to forcibly raise the air fuel ratio above a predetermined value when the air fuel ratio has been lower than the predetermined value for a prescribed time.
CONSTITUTION: A fuel control circuit 16 measures the quantity of fuel to an engine on the basis of signals from an intake quantity sensor 11 and a revolution sensor 15. An air fuel ratio control circuit 20 is added to the fuel control circuit 16. The circuit 20 performs feedback control on the basis of a signal from the air fuel raito sensor 19 so that the air fuel ratio has the predetermined value. The air fuel ratio control circuit 20 comprises a comparator circuit 201 which judges by comparison whether the air fuel ratio signal from the air fuel raito sensor 19 is higher or lower than the predetermined value, and a protection cirucit 205 which judges whether or not the air fuel ratio has been lower than the predetermined value for the prescribed time. When an output is produced by the protection circuit, the air fuel ratio is kept higher than the predetermined value for a second prescribed time.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5030178A JPS54141928A (en) | 1978-04-27 | 1978-04-27 | Air fuel ratio control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5030178A JPS54141928A (en) | 1978-04-27 | 1978-04-27 | Air fuel ratio control circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54141928A true JPS54141928A (en) | 1979-11-05 |
JPS6120700B2 JPS6120700B2 (en) | 1986-05-23 |
Family
ID=12855062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5030178A Granted JPS54141928A (en) | 1978-04-27 | 1978-04-27 | Air fuel ratio control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54141928A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61170643A (en) * | 1985-01-24 | 1986-08-01 | Fuji Heavy Ind Ltd | Compensation control system of o2 sensor in air-fuel ratio control |
JPS61196149A (en) * | 1985-02-27 | 1986-08-30 | Fuji Heavy Ind Ltd | O2 sensor deterioration alarm |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012200458A1 (en) | 2011-01-19 | 2012-07-19 | SCHWEIßTECHNISCHE LEHR- UND VERSUCHSANSTALT HALLE GMBH | Rail guide for mobile welding, cutting- or handling equipment for carrying and leading processing objects at large construction conservations along contact contour of two elements of pipe-to-pipe-intersection, comprises two guide surfaces |
-
1978
- 1978-04-27 JP JP5030178A patent/JPS54141928A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61170643A (en) * | 1985-01-24 | 1986-08-01 | Fuji Heavy Ind Ltd | Compensation control system of o2 sensor in air-fuel ratio control |
JPS61196149A (en) * | 1985-02-27 | 1986-08-30 | Fuji Heavy Ind Ltd | O2 sensor deterioration alarm |
Also Published As
Publication number | Publication date |
---|---|
JPS6120700B2 (en) | 1986-05-23 |
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