JPH0373647U

JPH0373647U -

Info

Publication number: JPH0373647U
Application number: JP13528889U
Authority: JP
Priority date: 1989-11-24
Filing date: 1989-11-24
Publication date: 1991-07-24

Description

[Brief explanation of the drawing]

第１図は、本考案に係わるコンパウンド型気化
器の一実施例断面図、第２図は一次側吸気通路の
ベンチユリー負圧に対するＯＮ−ＯＦＦバルブと
二次側開閉弁との作動時点を示す特性図、第３図
は一次側開閉弁と二次側開閉弁による燃料量と空
燃比との関係を示す特性図である。１０……気化器ボデイ、１２……一次側吸気通
路、１４……二次側吸気通路、１６……一次側開
閉弁、１８……二次側開閉弁、２０……フロート
室、２２……燃料通路、２６……ＯＮ−ＯＦＦバ
ルブ、２８……ダイアフラム、３０……負圧室、
３２……ばね、３４……弁体、３６……ベンチユ
リー部、３８……負圧導入通路。 Fig. 1 is a cross-sectional view of an embodiment of a compound type carburetor according to the present invention, and Fig. 2 is a characteristic showing the timing of operation of the ON-OFF valve and the secondary side on-off valve with respect to the negative pressure of the ventilator in the primary side intake passage. 3 are characteristic diagrams showing the relationship between the fuel amount and air-fuel ratio by the primary side on-off valve and the secondary side on-off valve. 10... Carburetor body, 12... Primary side intake passage, 14... Secondary side intake passage, 16... Primary side on-off valve, 18... Secondary side on-off valve, 20... Float chamber, 22... Fuel passage, 26...ON-OFF valve, 28...diaphragm, 30...negative pressure chamber,
32...Spring, 34...Valve body, 36...Venture section, 38...Negative pressure introduction passage.

Claims

[Scope of utility model registration request]

A primary side intake passage, a secondary side intake passage independent of the primary side intake passage, a primary side opening/closing valve provided in the primary side intake passage and operated in response to the accelerator, and a secondary side intake passage provided in the primary side intake passage. In a compound type carburetor having a secondary side on-off valve that is provided and operated in a predetermined operating state, a fuel passage communicating between a float chamber and a downstream side of the secondary side on-off valve of the secondary side intake passage; , an ON-OFF switch that opens and closes the fuel passage operated by the negative pressure of the primary side intake passage;
The ON-OFF valve closes the fuel passage when there is a negative pressure in the ventilate part during normal operation, and closes the fuel passage when the secondary side on-off valve starts opening the secondary side intake passage at a negative pressure that is slightly smaller than that. A compound type vaporizer characterized by an open passage.