JPS54105619A - Emergency annunciator for air fuel ratio controller - Google Patents
Emergency annunciator for air fuel ratio controllerInfo
- Publication number
- JPS54105619A JPS54105619A JP1151178A JP1151178A JPS54105619A JP S54105619 A JPS54105619 A JP S54105619A JP 1151178 A JP1151178 A JP 1151178A JP 1151178 A JP1151178 A JP 1151178A JP S54105619 A JPS54105619 A JP S54105619A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- throttle valve
- fuel ratio
- air fuel
- extraordinary condition
- 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
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To assure detection of an extraordinary condition of an air fuel ratio controller by constituting an emergency annunciator therefor such that an extraordinary condition is discriminated by coexistence of a first signal such as an exhaust gas density deviation signal, a second signal obtained from a running variable corresponding to the torque, and a third signal representative of the opening of a throttle valve whereupon a fourth signal is produced.
CONSTITUTION: An exhaust gas density deviation signal S2 adapted for feedback control of air fuel ratio is transmitted to a discriminator circuit 12, which provides a first signal S14 when the deviation signal S2 is held deviated to high or low continuously for a predetermined period of time. Also, when a running variable signal S12 which corresponds to the torque is greater than a predetermined level, a second signal S15 is provided from a torque identifier 13, and when a throttle valve opening signal S13 represents a throttle valve is not fully open, a third signal S16 is provided from a throttle valve opening identifier 14. When there exist the first to third signal at the same time and the first signal indicates the deviation signal S2 is in an extraordinary condition, an extraordinary condition signal S17 is provided as a fourth signal from an extraordinary condition discriminator circuit 15 to activate an annunciator 17. The signals S17 is utilized also for stopping the feedback control.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1151178A JPS54105619A (en) | 1978-02-06 | 1978-02-06 | Emergency annunciator for air fuel ratio controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1151178A JPS54105619A (en) | 1978-02-06 | 1978-02-06 | Emergency annunciator for air fuel ratio controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54105619A true JPS54105619A (en) | 1979-08-18 |
Family
ID=11780030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1151178A Pending JPS54105619A (en) | 1978-02-06 | 1978-02-06 | Emergency annunciator for air fuel ratio controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54105619A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414950A (en) * | 1980-10-06 | 1983-11-15 | Honda Giken Kogyo Kabushiki Kaisha | Fail safe device for air/fuel ratio feedback control system |
JPH0667589U (en) * | 1993-03-04 | 1994-09-22 | 晴之 岡本 | Tubular lid to prevent small animals from entering |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49108429A (en) * | 1973-01-12 | 1974-10-15 | ||
JPS51102727A (en) * | 1975-03-07 | 1976-09-10 | Nissan Motor | KUNENPISEIGYOSOCHI |
JPS51124738A (en) * | 1975-04-23 | 1976-10-30 | Nissan Motor Co Ltd | Air fuel ratio control apparatus |
-
1978
- 1978-02-06 JP JP1151178A patent/JPS54105619A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49108429A (en) * | 1973-01-12 | 1974-10-15 | ||
JPS51102727A (en) * | 1975-03-07 | 1976-09-10 | Nissan Motor | KUNENPISEIGYOSOCHI |
JPS51124738A (en) * | 1975-04-23 | 1976-10-30 | Nissan Motor Co Ltd | Air fuel ratio control apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414950A (en) * | 1980-10-06 | 1983-11-15 | Honda Giken Kogyo Kabushiki Kaisha | Fail safe device for air/fuel ratio feedback control system |
JPH0667589U (en) * | 1993-03-04 | 1994-09-22 | 晴之 岡本 | Tubular lid to prevent small animals from entering |
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