JPS5467828A - Negative pressure control device - Google Patents
Negative pressure control deviceInfo
- Publication number
- JPS5467828A JPS5467828A JP13480277A JP13480277A JPS5467828A JP S5467828 A JPS5467828 A JP S5467828A JP 13480277 A JP13480277 A JP 13480277A JP 13480277 A JP13480277 A JP 13480277A JP S5467828 A JPS5467828 A JP S5467828A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- path
- led
- atmospheric air
- atmosphere
- 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
- Exhaust-Gas Circulating Devices (AREA)
Abstract
PURPOSE: To reduce generation of poisonous gas by permitting normal combustion of air-fuel mixture at the time of the deceleration with a negative pressure control unit, which is used for an exhaust gas purifying system for automotive engines.
CONSTITUTION: When the manifold negative pressure exceeds a predetermined value at the time of the local deceleration, this negative pressure is led through a path 7 to a right chamber 5 in a differential valve 3 while it is also led through an orifice 8 to a left chamber 6. As a result, a pressure difference is produced across a diaphargm 4, causing the diaphragm 4 to be forced rightward against a spring 9 to open an atmospheric air inlet valve 2, whereby atmospheric air is introduced into a path 1 open to atmosphere and also to the intake manifold to prevent air-fuel mixture from becoming excessively rich. Further, the atmospheric air is led through check valves 12 and 14 to paths 11 and 13 to cause an EGR negative pressure path and a disboost negative pressure path to be opened to atmosphere. As a result, an ERG control valve is closed to stop circulation of the exhaust gas, thereby reducing the generation of poisonous gas.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13480277A JPS5467828A (en) | 1977-11-11 | 1977-11-11 | Negative pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13480277A JPS5467828A (en) | 1977-11-11 | 1977-11-11 | Negative pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5467828A true JPS5467828A (en) | 1979-05-31 |
Family
ID=15136860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13480277A Pending JPS5467828A (en) | 1977-11-11 | 1977-11-11 | Negative pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5467828A (en) |
-
1977
- 1977-11-11 JP JP13480277A patent/JPS5467828A/en active Pending
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