JPS5681241A - Negative-pressure transmission delay device in engine - Google Patents
Negative-pressure transmission delay device in engineInfo
- Publication number
- JPS5681241A JPS5681241A JP15859079A JP15859079A JPS5681241A JP S5681241 A JPS5681241 A JP S5681241A JP 15859079 A JP15859079 A JP 15859079A JP 15859079 A JP15859079 A JP 15859079A JP S5681241 A JPS5681241 A JP S5681241A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- negative
- negative pressure
- transmission
- engine
- 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
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
PURPOSE: To perform the optimum delay control of the transmision of suction negative pressure in accordance with the change of atmospheric pressure, by providing a bypass passage in a negative pressure passage so that the negative-pressure transmission delay device may be bypassed, and also by making a swtich valve to intervene in this passage so that it may be opened and closed in accordance with the change of the atmosphere pressure.
CONSTITUTION: Since a switch valve 12 in a bypass passage 11 in closed by an atmospheric pressure detector 13, when an engine is driven on a terrace, only an orifice 10a in a negative-pressure transmission delay device 10 is employed to transmission of the suction negative pressure, downstream a throttle valve 2. Consequently, the amount of delay of the negative-pressure transmission is increased by the portion of the discharge from an orifice 14 in the bypass passage 11. As a result, the negative pressure is further delayed in transmission to a negative pressure chamber 7e located in a secondary-air control device 7 in accordance with the decrease of suction negative pressure during the operation on a terrace, and when the engine is accelerated rapidly on terrace, supply of secondary air can be maintained for a certain time during the initial stage of the acceleration. This contrivance ensures the purification of HC and CO in the exhaust gas increased by any rapid acceleration.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15859079A JPS5681241A (en) | 1979-12-05 | 1979-12-05 | Negative-pressure transmission delay device in engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15859079A JPS5681241A (en) | 1979-12-05 | 1979-12-05 | Negative-pressure transmission delay device in engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5681241A true JPS5681241A (en) | 1981-07-03 |
| JPS638291B2 JPS638291B2 (en) | 1988-02-22 |
Family
ID=15675004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15859079A Granted JPS5681241A (en) | 1979-12-05 | 1979-12-05 | Negative-pressure transmission delay device in engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5681241A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451635A (en) * | 1977-09-30 | 1979-04-23 | Fukumoto Seisen Seisakushiyo K | Paper article fitting metal |
| JPS5517683A (en) * | 1978-07-25 | 1980-02-07 | Nippon Denso Co Ltd | After burn preventor |
-
1979
- 1979-12-05 JP JP15859079A patent/JPS5681241A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451635A (en) * | 1977-09-30 | 1979-04-23 | Fukumoto Seisen Seisakushiyo K | Paper article fitting metal |
| JPS5517683A (en) * | 1978-07-25 | 1980-02-07 | Nippon Denso Co Ltd | After burn preventor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS638291B2 (en) | 1988-02-22 |
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