JPS555417A - Air-fuel ratio controller - Google Patents
Air-fuel ratio controllerInfo
- Publication number
- JPS555417A JPS555417A JP7585078A JP7585078A JPS555417A JP S555417 A JPS555417 A JP S555417A JP 7585078 A JP7585078 A JP 7585078A JP 7585078 A JP7585078 A JP 7585078A JP S555417 A JPS555417 A JP S555417A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- circuit
- comparator
- level
- 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 prevent a misoperation, by providing an active monitor circuit for detecting whether the air-fuel ratio sensor becoming active or not.
CONSTITUTION: With an air-fuel ratio sensor 1 not becoming active and a condition, with a terminal voltage A lower than the level of comparison of a comparator circuit 2, kept continued, a comparator 508 outputs a signal of H-level. Consequently, an integration stop circuit 6 works to stop the integral control action of an integrating circuit 3, with an integrated output held at a constant value, resulting in no operation of air-fuel ratio feed-back control by an air-fuel control method 4. With the air-fuel ratio sensor 1 becoming an active state, when in a small air-fuel ratio, output of the comparator 508 becomes L-level with the integration stop circuit 6 not workig, and the integrating circuit 3, as usually known to public, makes an adjustment of the output so as to obtain the prescribed air-fuel ratio.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7585078A JPS555417A (en) | 1978-06-21 | 1978-06-21 | Air-fuel ratio controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7585078A JPS555417A (en) | 1978-06-21 | 1978-06-21 | Air-fuel ratio controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS555417A true JPS555417A (en) | 1980-01-16 |
Family
ID=13588095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7585078A Pending JPS555417A (en) | 1978-06-21 | 1978-06-21 | Air-fuel ratio controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS555417A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726236A (en) * | 1980-07-23 | 1982-02-12 | Honda Motor Co Ltd | Warming up detector for air to fuel ratio controller of internal combustion engine |
| US4905469A (en) * | 1987-10-20 | 1990-03-06 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback system having improved activation determination for air-fuel ratio sensor |
| US4915081A (en) * | 1988-03-18 | 1990-04-10 | Honda Giken Kogyo K.K. | Method of determining activation of exhaust gas ingredient-concentration sensors for internal combustion engines |
| US4941318A (en) * | 1988-03-01 | 1990-07-17 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system having short-circuit detection for air-fuel ratio sensor |
| US4958611A (en) * | 1988-03-01 | 1990-09-25 | Mitsubishi Denki Kabushiki Kaisha | Air-fuel ratio controller of internal combustion engine |
| US4970858A (en) * | 1988-03-30 | 1990-11-20 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback system having improved activation determination for air-fuel ratio sensor |
-
1978
- 1978-06-21 JP JP7585078A patent/JPS555417A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726236A (en) * | 1980-07-23 | 1982-02-12 | Honda Motor Co Ltd | Warming up detector for air to fuel ratio controller of internal combustion engine |
| JPH0250305B2 (en) * | 1980-07-23 | 1990-11-01 | Honda Motor Co Ltd | |
| US4905469A (en) * | 1987-10-20 | 1990-03-06 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback system having improved activation determination for air-fuel ratio sensor |
| US4941318A (en) * | 1988-03-01 | 1990-07-17 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system having short-circuit detection for air-fuel ratio sensor |
| US4958611A (en) * | 1988-03-01 | 1990-09-25 | Mitsubishi Denki Kabushiki Kaisha | Air-fuel ratio controller of internal combustion engine |
| US4915081A (en) * | 1988-03-18 | 1990-04-10 | Honda Giken Kogyo K.K. | Method of determining activation of exhaust gas ingredient-concentration sensors for internal combustion engines |
| US4970858A (en) * | 1988-03-30 | 1990-11-20 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback system having improved activation determination for air-fuel ratio sensor |
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