JPS5493721A - Accelarating pump device of carburetor for internal combustion engine - Google Patents

Accelarating pump device of carburetor for internal combustion engine

Info

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
Application number
JP3478A
Other languages
Japanese (ja)
Inventor
Nobukatsu Ishikawa
Takao Niwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP3478A priority Critical patent/JPS5493721A/en
Publication of JPS5493721A publication Critical patent/JPS5493721A/en
Pending legal-status Critical Current

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
JP3478A 1978-01-05 1978-01-05 Accelarating pump device of carburetor for internal combustion engine Pending JPS5493721A (en)

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)

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