JPS5493721A - Accelarating pump device of carburetor for internal combustion engine - Google Patents
Accelarating pump device of carburetor for internal combustion engineInfo
- Publication number
- JPS5493721A JPS5493721A JP3478A JP3478A JPS5493721A JP S5493721 A JPS5493721 A JP S5493721A JP 3478 A JP3478 A JP 3478A JP 3478 A JP3478 A JP 3478A JP S5493721 A JPS5493721 A JP S5493721A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- engine
- negative pressure
- plunger
- port
- 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
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
PURPOSE: To make the both compatible, drivability and cleaning of exhaust emission, by providing a two-system accelerator pump, for the plunger type driven by a diaphragm in response to a suction vacuum of the engine and for the diaphragm type in response to a suction vacuum of the engine.
CONSTITUTION: Before a completion of engine warm-up, due to a low temperature of engine cooling water 66, a thermowax 72 is shrunken with a negative pressure port 62 made opening to a diaphragm 52', 38'. A small degree of opening of a throttle valve 17 causes a big negative pressure to act on the diaphragm 38' from the port 62 through negative pressure tubes 64, 64', operating the first accelerator pump having a plunger 72. After a completion of the engine warm-up operation, the thermowax 72 is expanded, with a plunger 74 isolating the negative pressure passage 64' from the port 62, to operate the second accelerator pump consisting of the diaphragm 52'. In such way, with the pumps selectively used before and after the operation of engine warm-up, the both requirements.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3478A JPS5493721A (en) | 1978-01-05 | 1978-01-05 | Accelarating pump device of carburetor for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3478A JPS5493721A (en) | 1978-01-05 | 1978-01-05 | Accelarating pump device of carburetor for internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5493721A true JPS5493721A (en) | 1979-07-25 |
Family
ID=11463053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3478A Pending JPS5493721A (en) | 1978-01-05 | 1978-01-05 | Accelarating pump device of carburetor for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5493721A (en) |
-
1978
- 1978-01-05 JP JP3478A patent/JPS5493721A/en active Pending
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