JPS6453448U

JPS6453448U -

Info

Publication number: JPS6453448U
Application number: JP15039287U
Authority: JP
Priority date: 1987-09-30
Filing date: 1987-09-30
Publication date: 1989-04-03

Description

[Brief explanation of the drawing]

第１図は本考案による混合気供給装置の第１実
施例の断面図、第２図は上記第１実施例の空気流
量変化に対応するジエツト径の変化を示すグラフ
、第３図は第２実施例の断面図、第４図は第３実
施例の燃料通路部の断面図、第５図は第４実施例
の負圧導入部の断面図、第６図は従来例の断面図
である。１……吸気通路、１ａ……ベンチユリー、２…
…エアコントロールバルブ、３……負圧応動装置
、６……フロート室、７……ノズル、１６……絞
り弁、１７……燃料通路、１８……ジエツト、１
９……ジエツトコントロールバルブ、２０……電
磁弁、２１……メイン負圧取入れ口、２２……ス
ロー負圧取入れ口、２３……負圧通路、２４……
切換えバルブ、２５……液面レベルセンサ、２６
……開度センサ、２７……制御回路。 FIG. 1 is a sectional view of a first embodiment of the air-fuel mixture supply device according to the present invention, FIG. 2 is a graph showing changes in jet diameter corresponding to changes in air flow rate in the first embodiment, and FIG. 4 is a sectional view of the fuel passage section of the third embodiment, FIG. 5 is a sectional view of the negative pressure introduction section of the fourth embodiment, and FIG. 6 is a sectional view of the conventional example. . 1... Intake passage, 1a... Ventilation, 2...
... Air control valve, 3 ... Negative pressure response device, 6 ... Float chamber, 7 ... Nozzle, 16 ... Throttle valve, 17 ... Fuel passage, 18 ... Jet, 1
9... Jet control valve, 20... Solenoid valve, 21... Main negative pressure intake, 22... Slow negative pressure intake, 23... Negative pressure passage, 24...
Switching valve, 25...Liquid level sensor, 26
...Opening sensor, 27...Control circuit.

Claims

[Scope of utility model registration request]

In an air-fuel mixture supply device that maintains an appropriate air-fuel ratio of an air-fuel mixture by controlling a fuel flow rate so as to maintain a constant liquid level in a negative pressure passage communicating between an intake passage and a fuel passage, an air control valve provided in an intake passage, an opening sensor that detects the opening of the air control valve, and main and slow negative pressure intakes that open upstream and downstream of the air control valve, respectively;
A negative pressure passage connected to the main and slow negative pressure intakes via a switching valve, a liquid level detection means provided in the negative pressure passage, and a fuel passage upstream from the connection part with the negative pressure passage. a jet control valve for changing the diameter of a fuel metering jet located at the fuel passageway, and an electric fuel flow rate control means provided downstream from the connection portion of the fuel passageway with the negative pressure passageway;
Almost simultaneously changing the opening of the jet control valve and switching the switching valve according to the output from the front opening sensor, and controlling the electric fuel flow control means according to the output from the liquid level detection means. An air-fuel mixture supply device comprising: a control circuit for controlling the air-fuel mixture;