JPS6441636A - Air-fuel ratio control method for internal combustion engine - Google Patents
Air-fuel ratio control method for internal combustion engineInfo
- Publication number
- JPS6441636A JPS6441636A JP19686787A JP19686787A JPS6441636A JP S6441636 A JPS6441636 A JP S6441636A JP 19686787 A JP19686787 A JP 19686787A JP 19686787 A JP19686787 A JP 19686787A JP S6441636 A JPS6441636 A JP S6441636A
- Authority
- JP
- Japan
- Prior art keywords
- value
- engine
- air
- fuel ratio
- limit value
- 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 improve exhaust gas purifying performance, by a method wherein, when the transient running state of an engine is detected, an upper limit value or less or a lower limit value or more of correction of an air-fuel ratio based on a comparing result between an exhaust gas concentration detecting value and a given reference value is prohibited against limitation. CONSTITUTION:In an engine 1, a throttle body 3 having a throttle valve is situated in an intake air pipe 2, and a three-dimensional catalyst 13 is situated in an exhaust pipe 12. A detecting signal from an O2 sensor 14 located in the exhaust pipe 12 on the upper stream side of the three-dimensional catalyst 13 is inputted to an ECU 5 together with detecting signals from various sensors 4, 7, 9-11 which detect the running state of the engine 1. Meanwhile, from the ECU 5, a control signal to a fuel injection valve 6 is outputted. In this case, when the transient running state of the engine 1 is detected, an upper limit value or less or a lower limit value or more of a correction value of an air-fuel ratio based on a comparing result between an exhaust gas concentration detecting value and a given reference value is prohibited against limitation only during a following given period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19686787A JPS6441636A (en) | 1987-08-06 | 1987-08-06 | Air-fuel ratio control method for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19686787A JPS6441636A (en) | 1987-08-06 | 1987-08-06 | Air-fuel ratio control method for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6441636A true JPS6441636A (en) | 1989-02-13 |
Family
ID=16364966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19686787A Pending JPS6441636A (en) | 1987-08-06 | 1987-08-06 | Air-fuel ratio control method for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6441636A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020094257A1 (en) * | 2018-11-09 | 2020-05-14 | Perkins Engines Company Limited | Method for operating an internal combustion engine |
-
1987
- 1987-08-06 JP JP19686787A patent/JPS6441636A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020094257A1 (en) * | 2018-11-09 | 2020-05-14 | Perkins Engines Company Limited | Method for operating an internal combustion engine |
| CN112969848A (en) * | 2018-11-09 | 2021-06-15 | 珀金斯发动机有限公司 | Method for operating an internal combustion engine |
| US11492991B2 (en) | 2018-11-09 | 2022-11-08 | Perkins Engines Company Limited | Method for operating an internal combustion engine |
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