JPS5770911A - Secondary air introducing device of internal combustion engine - Google Patents
Secondary air introducing device of internal combustion engineInfo
- Publication number
- JPS5770911A JPS5770911A JP14678680A JP14678680A JPS5770911A JP S5770911 A JPS5770911 A JP S5770911A JP 14678680 A JP14678680 A JP 14678680A JP 14678680 A JP14678680 A JP 14678680A JP S5770911 A JPS5770911 A JP S5770911A
- Authority
- JP
- Japan
- Prior art keywords
- duct
- gate
- secondary air
- output
- catalyst
- 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
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
PURPOSE: To prevent overheating of a catalyst and accompanying stink by always supplying secondary air to an exhaust system in order to cool the catalyst independently of output of an oxygen sensor while an engine is idle and an air conditioner is in operation.
CONSTITUTION: Normally, operation of a catalyst is controlled by entering the output from an oxygen sensor 64 located in an exhaust passage ino an OR gate 60, subsequently opening or closing a solenoid valve 50 with the output 68, from said gate and then opening or closing an operational negative pressure duct 48 of a diaphragm 46 for a controlling valve 44 in a duct 42 which supplies secondary air to an exhaust system. Further, a duct 42 is led to a duct 24 in EGR duct passage 24, 28, while a control valve 26 in the EGR duct passage is controlled by a port negative pressure located in an upstream of air supply durng a throttle valve 32 is entirely closed. When SW72 is ON and both outputs of a detector 70 for of idle engine speed are entered in an AND gate 66 during opertion of the air conditioner the solenoid valve 50 is opened indenpendently of the oxtgen sensor output 62 of the OR gate 60 so as to supply the secondary air.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14678680A JPS5770911A (en) | 1980-10-22 | 1980-10-22 | Secondary air introducing device of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14678680A JPS5770911A (en) | 1980-10-22 | 1980-10-22 | Secondary air introducing device of internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5770911A true JPS5770911A (en) | 1982-05-01 |
JPS6344927B2 JPS6344927B2 (en) | 1988-09-07 |
Family
ID=15415500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14678680A Granted JPS5770911A (en) | 1980-10-22 | 1980-10-22 | Secondary air introducing device of internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5770911A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0740847U (en) * | 1993-12-27 | 1995-07-21 | 茂 坂根 | Thin roof tile |
-
1980
- 1980-10-22 JP JP14678680A patent/JPS5770911A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6344927B2 (en) | 1988-09-07 |
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