JPS6432043A - Air-fuel ratio controller for engine - Google Patents
Air-fuel ratio controller for engineInfo
- Publication number
- JPS6432043A JPS6432043A JP62189518A JP18951887A JPS6432043A JP S6432043 A JPS6432043 A JP S6432043A JP 62189518 A JP62189518 A JP 62189518A JP 18951887 A JP18951887 A JP 18951887A JP S6432043 A JPS6432043 A JP S6432043A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- sensor
- occurring
- delay time
- 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 overshoot in delay time as preventing a noise from occurring by delaying the reversal of an air-fuel ratio control direction as long as the specified time at the output reversal of an air-fuel ratio sensor, and making a control gain in an air-fuel ratio feedback system smaller during this delay time. CONSTITUTION:Each detected value of an air flow meter 14, and oxygen sensor 17, a crank angle sensor 21, an intake air temperature sensor 23, a water temperature sensor 24, etc., is inputted into a control unit 20, and a fundamental fuel injection operated on the basis of intake air quantity, engine speed or the like is compensated by the feedback compensation value based on the detected value of the oxygen sensor 17. The control unit 20 delays as long as the specified at an output reversal of the oxygen sensor 17, reversing the feedback compensation value, and it prevents any false control due to a noise from occurring. During this delay time, a control gain is made smaller so as to cause variation in the feedback compensation value to become smaller, thus overshoot is prevented from occurring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62189518A JPS6432043A (en) | 1987-07-28 | 1987-07-28 | Air-fuel ratio controller for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62189518A JPS6432043A (en) | 1987-07-28 | 1987-07-28 | Air-fuel ratio controller for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6432043A true JPS6432043A (en) | 1989-02-02 |
Family
ID=16242626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62189518A Pending JPS6432043A (en) | 1987-07-28 | 1987-07-28 | Air-fuel ratio controller for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6432043A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015121143A (en) * | 2013-12-24 | 2015-07-02 | ダイハツ工業株式会社 | Control device for internal combustion engine |
| WO2023047571A1 (en) * | 2021-09-27 | 2023-03-30 | ヤマハ発動機株式会社 | Catalyst deterioration diagnosis device |
-
1987
- 1987-07-28 JP JP62189518A patent/JPS6432043A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015121143A (en) * | 2013-12-24 | 2015-07-02 | ダイハツ工業株式会社 | Control device for internal combustion engine |
| WO2023047571A1 (en) * | 2021-09-27 | 2023-03-30 | ヤマハ発動機株式会社 | Catalyst deterioration diagnosis device |
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