JPS6445952A - Air-fuel ratio control method for internal combustion engine - Google Patents
Air-fuel ratio control method for internal combustion engineInfo
- Publication number
- JPS6445952A JPS6445952A JP20028187A JP20028187A JPS6445952A JP S6445952 A JPS6445952 A JP S6445952A JP 20028187 A JP20028187 A JP 20028187A JP 20028187 A JP20028187 A JP 20028187A JP S6445952 A JPS6445952 A JP S6445952A
- Authority
- JP
- Japan
- Prior art keywords
- intake air
- temperature
- valve
- fuel ratio
- 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.)
- Pending
Links
Abstract
PURPOSE:To prevent air-fuel ratio from its rich state and to improve the startability by controlling the opening of a flow regulating valve, provided interposing in a secondary intake air supply passage communicating with inside an intake pipe in the downstream of a throttle valve, being based on an intake air temperature and an engine temperature when an engine is started in a high temperature. CONSTITUTION:A linear type solenoid valve 9, serving as the flow control valve, is provided in a secondary intake air supply passage 8 communicating with inside an intake manifold 4 in the downstream from a throttle valve 3 in a carburetor 1, and the solenoid valve 9 is controlled in its valve opening by a control circuit 20. The control circuit 20 inputs each output signal of an absolute pressure sensor 10, crank angle sensor 11, cooling water temperature sensor 12, intake air temperature sensor 13 and an oxygen concentration sensor 14 or the like. When an engine is started, the opening of the solenoid valve 9 is controlled being based on an intake air temperature and a cooling water temperature when both of these temperatures are decided to be placed in a high temperature starting condition of the predetermined temperature or more. By this method thus obtained, supplying secondary intake air corresponding to the evaporating amount of fuel, air-fuel ratio is prevented from a rich state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20028187A JPS6445952A (en) | 1987-08-11 | 1987-08-11 | Air-fuel ratio control method for internal combustion engine |
| US07/175,470 US4886035A (en) | 1987-03-31 | 1988-03-30 | Air-fuel ratio control method for an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20028187A JPS6445952A (en) | 1987-08-11 | 1987-08-11 | Air-fuel ratio control method for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6445952A true JPS6445952A (en) | 1989-02-20 |
Family
ID=16421707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20028187A Pending JPS6445952A (en) | 1987-03-31 | 1987-08-11 | Air-fuel ratio control method for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6445952A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011093420A1 (en) | 2010-01-28 | 2011-08-04 | 富士フイルム株式会社 | Conductive sheet, method for using conductive sheet, and touch panel |
-
1987
- 1987-08-11 JP JP20028187A patent/JPS6445952A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011093420A1 (en) | 2010-01-28 | 2011-08-04 | 富士フイルム株式会社 | Conductive sheet, method for using conductive sheet, and touch panel |
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