JPH02124237U

JPH02124237U -

Info

Publication number: JPH02124237U
Application number: JP3249289U
Authority: JP
Priority date: 1989-03-22
Filing date: 1989-03-22
Publication date: 1990-10-12

Description

[Brief explanation of drawings]

第１図は本考案による燃料噴射装置の概略断面
図、第２図は空燃比制御機構の要部断面図、第３
図Ａ，Ｂは夫々バイメタルとスライド弁の位置関
係を示す図、第４図は本考案による空燃比制御機
構の第二実施例を示す要部断面図、第５図Ａ，Ｂ
は第二実施例に関して夫々バイメタルとスライド
弁の位置関係を示す図である。７……スロー系燃料計量手段、８……メイン系
燃料計量手段、９、１０……空燃比制御バルブ、
１３……暖気用空気制御手段、２４……メイン計
量ジエツト、３５……バイメタル、３９……バイ
パス通路、３９ａ……第一バイパス通路、３９ｂ
……第二バイパス通路、４３……第一ダイアフラ
ム、４４……第一バルブ、４５……第一計量ジエ
ツト、４８……第二ダイアフラム、４９……ボー
ルバルブ、５１……第二ジエツト、５７……スラ
イド弁、５８……連通部、６３……第三ジエツト
、６５……第四ジエツト。 Fig. 1 is a schematic sectional view of the fuel injection device according to the present invention, Fig. 2 is a sectional view of main parts of the air-fuel ratio control mechanism, and Fig. 3 is a schematic sectional view of the fuel injection device according to the present invention.
Figures A and B are diagrams showing the positional relationship between the bimetal and the slide valve, Figure 4 is a cross-sectional view of main parts showing the second embodiment of the air-fuel ratio control mechanism according to the present invention, and Figures 5A and B.
FIG. 6 is a diagram showing the positional relationship between the bimetal and the slide valve, respectively, regarding the second embodiment. 7... Slow system fuel measuring means, 8... Main system fuel measuring means, 9, 10... Air-fuel ratio control valve,
13... Warm air control means, 24... Main metering jet, 35... Bimetal, 39... Bypass passage, 39a... First bypass passage, 39b
...Second bypass passage, 43...First diaphragm, 44...First valve, 45...First metering jet, 48...Second diaphragm, 49...Ball valve, 51...Second jet, 57 ... slide valve, 58 ... communication section, 63 ... third jet, 65 ... fourth jet.

Claims

[Scope of Claim for Utility Model Registration] A fuel measuring means that measures the flow rate of fuel to be injected based on negative pressure corresponding to the air flow rate using a metering jet, and a bimetal that displaces according to the engine cooling water temperature. In a pressure-balanced fuel injection device, the fuel injection device is equipped with a warm-up air control means that controls an increase in air flow rate, and a fuel bypass passage that bypasses the metering jet and is branched into two, interlocking with each other. first and second fuel valves that respectively open and close the branched bypass passage by displacement of the first and second diaphragms; a jet that is disposed in the bypass passage and measures the fuel flow rate; and slide valves that apply atmospheric pressure or manifold negative pressure to the first and second diaphragms in accordance with the displacement, and as the cooling water temperature rises, both the fuel valves are opened and one fuel valve is opened. An air-fuel ratio control mechanism characterized by being able to control switching between a valve state and an open state of both fuel valves.