JPS6028253U - Air valve type vaporizer - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案によるエアバルブ式気化器の側面断面図
、第２図は第１図の■−■線に沿ってみた側面断面図、
第３図は第２図の一部拡大図、第４図は第３図と同じ部
分を示す別の作動状態の第２図の一部拡大図、第５図は
エアバルブ下流の負圧と機関回転数の１関係を示す線図
である。 ２・・・・・・１次側気化器、３・・・・・・２次側気
化器、°４，８・・・・・・吸気通路、９・・曲エアバ
ルブ、１２・・・・・・フロート室、１６・・曲メイン
ジェット、２３・・・・・・メタリングロッド、２４・
・・・・・ウェル、２５−−−−−−ピックアップチュ
ーブ、３０・・・・・・負圧導入通路、３３・・・・・
・制御弁。Fig. 1 is a side sectional view of the air valve type vaporizer according to the present invention, Fig. 2 is a side sectional view taken along the line ■-■ in Fig. 1,
Fig. 3 is a partially enlarged view of Fig. 2, Fig. 4 is a partially enlarged view of Fig. 2 in a different operating state showing the same part as Fig. 3, and Fig. 5 shows the negative pressure downstream of the air valve and the engine. FIG. 2 is a diagram showing a relationship between rotational speeds. 2...Primary side carburetor, 3...Secondary side carburetor, °4, 8...Intake passage, 9...Curved air valve, 12... ... Float chamber, 16 ... Curved main jet, 23 ... Metering rod, 24.
...Well, 25--Pickup tube, 30...Negative pressure introduction passage, 33...
・Control valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ２次側気化器の吸気通路内に吸入空気流によって開閉制
御されるエアバルブを設け、該２次側気化器の吸気通路
の側方に加速燃料ウェルを形成して該ウェルの下方部を
絞りを介して気化器フロート室の燃料内に連結し、該ウ
ェル内にほぼ垂直方向に延びる加速燃料供給用ピックア
ップチューブを挿入して該チューブの燃料流入口を該ウ
ェル内の燃料内に開口せしめると共に該ピックアップチ
ューブの燃料流出口を上記エアバルブと２次側スロット
ル弁間の吸気通路内に開口せしめたエアバルブ式気化器
において、上記ウェルの上部空間を一方では絞りを介し
て気化器フロート室の上部空間に連結すると共に他方で
は負圧導入通路を介して２次側気化器の吸気通路内に連
結し、該吸気通路内の負圧に応動して該負圧が予め定め
られ−た負圧よりも大きくなったときに閉弁する制御弁
装置を該負圧導入通路内に配置したエアバルブ式気化器
。An air valve that is opened and closed by the intake air flow is provided in the intake passage of the secondary side carburetor, and an acceleration fuel well is formed on the side of the intake passage of the secondary side carburetor, and the lower part of the well is throttled. A pick-up tube for supplying accelerated fuel is connected to the fuel in the carburetor float chamber through the well, and is inserted into the well to provide an accelerated fuel supply, and extends substantially vertically into the well so that the fuel inlet of the tube opens into the fuel in the well. In an air valve type carburetor in which the fuel outlet of the pickup tube is opened into the intake passage between the air valve and the secondary throttle valve, the upper space of the well is connected to the upper space of the carburetor float chamber via a restriction. The other side is connected to the intake passage of the secondary side carburetor via a negative pressure introduction passage, and in response to the negative pressure in the intake passage, the negative pressure becomes larger than a predetermined negative pressure. An air valve type vaporizer in which a control valve device that closes when the negative pressure is disposed in the negative pressure introduction passage.