JPS5566644A - Air-fuel ratio controlling system for internal combustion engine - Google Patents
Air-fuel ratio controlling system for internal combustion engineInfo
- Publication number
- JPS5566644A JPS5566644A JP13840178A JP13840178A JPS5566644A JP S5566644 A JPS5566644 A JP S5566644A JP 13840178 A JP13840178 A JP 13840178A JP 13840178 A JP13840178 A JP 13840178A JP S5566644 A JPS5566644 A JP S5566644A
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- degrees
- port
- valve
- throttle valve
- 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.)
- Granted
Links
Landscapes
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
PURPOSE: To protect catalyst against overheating, by stopping supply of secondary air as soon as rich mixture is supplied into the cylinder.
CONSTITUTION: When opening of main throttle valve 6 becomes 35W45 degrees about 5 degrees smaller than the throttle opening of 40W50 degrees where function of holding secondary throttle valve 10 is removed, vacuum port 40 opens at an upstream portion of the main throttle valve 6. This vacuum port 40 is communicated via vacuum conduit 41 to vacuum operated chamber 25 of power valve 23 and vacuum chamber 35 of vacuum diaphragm means 30. Therefore, when opening of the main throttle valve 6 becomes 35W45 degrees, atmospheric pressure is acted to vacuum port 40, so that movable piston 24 of power valve 23 is moved downward by the function of compression spring 26 and fuel port 27 is opened. At the same time, valve port 38 is closed to stop supply of secondary air.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13840178A JPS5840021B2 (en) | 1978-11-11 | 1978-11-11 | Air-fuel ratio control device for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13840178A JPS5840021B2 (en) | 1978-11-11 | 1978-11-11 | Air-fuel ratio control device for internal combustion engines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5566644A true JPS5566644A (en) | 1980-05-20 |
JPS5840021B2 JPS5840021B2 (en) | 1983-09-02 |
Family
ID=15221084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13840178A Expired JPS5840021B2 (en) | 1978-11-11 | 1978-11-11 | Air-fuel ratio control device for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5840021B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62127460U (en) * | 1986-02-03 | 1987-08-12 |
-
1978
- 1978-11-11 JP JP13840178A patent/JPS5840021B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62127460U (en) * | 1986-02-03 | 1987-08-12 |
Also Published As
Publication number | Publication date |
---|---|
JPS5840021B2 (en) | 1983-09-02 |
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