JP3230075B2 - Engine fuel supply - Google Patents
Engine fuel supplyInfo
- Publication number
- JP3230075B2 JP3230075B2 JP01342696A JP1342696A JP3230075B2 JP 3230075 B2 JP3230075 B2 JP 3230075B2 JP 01342696 A JP01342696 A JP 01342696A JP 1342696 A JP1342696 A JP 1342696A JP 3230075 B2 JP3230075 B2 JP 3230075B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm pump
- fuel supply
- introduction passage
- pressure introduction
- pulsation pressure
- 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.)
- Expired - Fee Related
Links
Landscapes
- Reciprocating Pumps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エンジンの燃料供
給装置に関し、詳しくは、ダイヤフラムポンプの作動不
良を抑制できるものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply device for an engine, and more particularly to a device capable of suppressing a malfunction of a diaphragm pump.
【０００２】[0002]
【従来の技術】エンジンの燃料供給装置の従来技術とし
て、本発明と同様、燃料供給ポンプとしてダイヤフラム
ポンプを用い、このダイヤフラムポンプから脈動圧導入
通路を導出し、この脈動圧導入通路の導出端部を脈動圧
発生個所に接続し、この脈動圧発生個所で発生する脈動
圧に基づいてダイヤフラムポンプを駆動するようにした
ものがあった。この従来技術では、脈動圧導入通路の導
出端部をクランクケース内に接続し、ピストンの昇降に
よってクランクケース内で発生する脈動に基づいて、ダ
イヤフラムポンプを駆動していた。2. Description of the Related Art As a prior art of a fuel supply device for an engine, a diaphragm pump is used as a fuel supply pump as in the present invention, and a pulsation pressure introduction passage is derived from the diaphragm pump. Is connected to a pulsation pressure generating point, and a diaphragm pump is driven based on the pulsating pressure generated at the pulsating pressure generating point. In this conventional technique, the leading end of the pulsation pressure introduction passage is connected to the inside of the crankcase, and the diaphragm pump is driven based on the pulsation generated in the crankcase due to the elevation of the piston.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術では、ク
ランクケース内で飛散するエンジンオイルの油滴が脈動
圧導入通路に侵入して、この通路を塞ぎ、ダイヤフラム
ポンプの作動を不良することがある。In the above prior art, oil droplets of engine oil scattered in the crankcase may enter the pulsating pressure introduction passage, close the passage, and cause malfunction of the diaphragm pump. .
【０００４】本発明の課題は、ダイヤフラムポンプの作
動不良を抑制できるエンジンの燃料供給装置を提供する
ことにある。[0004] It is an object of the present invention to provide a fuel supply device for an engine which can suppress a malfunction of a diaphragm pump.
【０００５】[0005]
【課題を解決するための手段】本発明は、図１に示すよ
うに、燃料供給ポンプとしてダイヤフラムポンプ１を用
い、このダイヤフラムポンプ１から脈動圧導入通路２を
導出し、この脈動圧導入通路２の導出端部３を脈動圧発
生個所４に接続し、この脈動圧発生個所４で発生する脈
動圧に基づいてダイヤフラムポンプ１を駆動するように
するとともに、シリンダヘッド１０から導出した吸気管
１２の導出端に気化器１３を設けたエンジンの燃料供給
装置において、次のようにしたことを特徴とする。According to the present invention, as shown in FIG. 1, a diaphragm pump 1 is used as a fuel supply pump, and a pulsating pressure introducing passage 2 is led out of the diaphragm pump 1, and the pulsating pressure introducing passage 2 is provided. Is connected to a pulsating pressure generating point 4 to drive the diaphragm pump 1 based on the pulsating pressure generated at the pulsating pressure generating point 4.
And an intake pipe derived from the cylinder head 10
A fuel supply device for an engine in which a carburetor 13 is provided at an outlet end of the fuel supply device 12 is characterized in that it is operated as follows.
【０００６】すなわち、上記脈動圧導入通路２の導出端
部３を燃焼室への吸気経路５に向けて下向きに接続し、
脈動圧導入通路２の導出端部３に絞り部６を形成したこ
とを特徴とする。That is, the outlet end 3 of the pulsation pressure introduction passage 2 is connected downward toward the intake path 5 to the combustion chamber ,
The pulsating pressure introduction passage 2 is characterized in that a throttle portion 6 is formed at the outlet end 3 .
【０００７】[0007]
【発明の作用及び効果】本発明によれば、次の作用効果
を奏する。脈動圧導入通路２の導出端部３を吸気経路
５に接続したので、火花点火式エンジンでは霧化燃料
が、脈動圧導入通路２に侵入するのみで、エンジンオイ
ルのような高粘度の油滴が侵入するおそれはなく、脈動
圧導入通路２の閉塞によるダイヤフラムポンプ１の作動
不良を抑制できる。According to the present invention, the following effects can be obtained. Since the leading end 3 of the pulsating pressure introduction passage 2 is connected to the intake passage 5, the spark ignition engine uses
But only enter the pulse dynamic pressure introduction passage 2, no risk of oil droplets of a high viscosity such as engine oil from entering, it is possible to suppress malfunction of the diaphragm pump 1 due to blockage of the pulsation pressure introduction passage 2.
【０００８】脈動圧導入通路２中に絞り部６を形成し
たので、吸気経路５で発生する大きな脈動圧変化を緩和
してダイヤフラムポンプ１に伝えることができ、クラン
クケースで発生する小さな脈動変化を想定して設計され
ている既存のダイヤフラムポンプを、改造することな
く、そのまま転用できる。Since the throttle portion 6 is formed in the pulsating pressure introducing passage 2, a large pulsating pressure change generated in the intake path 5 can be reduced and transmitted to the diaphragm pump 1, and a small pulsating change generated in the crankcase can be reduced. Existing diaphragm pumps designed and designed for use can be diverted without modification.
【０００９】[0009]
【発明の実施の形態】本発明の実施の形態を図面に基づ
いて説明する。図１及び図２は第１実施形態を説明する
図である。図２に示すように、第１実施形態では、縦型
の空冷ガソリンエンジンを用いている。このエンジンの
構成は次の通りである。すなわち、エンジン本体７の前
側にファンケース８を組み付け、エンジン本体７の横側
に燃料タンク９を配置し、エンジン本体７の上部にシリ
ンダヘッド１０とヘッドカバー１１とを組み付け、シリ
ンダヘッド１０の前側から横向きに吸気管１２を導出
し、吸気管１２の導出端に気化器１３とエアクリーナ１
４とを取り付けてある。Embodiments of the present invention will be described with reference to the drawings. 1 and 2 are views for explaining the first embodiment. As shown in FIG. 2, in the first embodiment, a vertical air-cooled gasoline engine is used. The structure of this engine is as follows. That is, the fan case 8 is assembled on the front side of the engine body 7, the fuel tank 9 is arranged on the side of the engine body 7, the cylinder head 10 and the head cover 11 are assembled on the upper part of the engine body 7, and from the front side of the cylinder head 10. The intake pipe 12 is led out sideways, and the carburetor 13 and the air cleaner 1
4 is attached.
【００１０】この実施形態では、図１に示すように、燃
料供給ポンプとしてダイヤフラムポンプ１を用い、この
ダイヤフラムポンプ１から脈動圧導入通路２を導出し、
この脈動圧導入通路２の導出端部３を脈動圧発生個所４
に接続し、この脈動圧発生個所４で発生する脈動圧に基
づいてダイヤフラムポンプ１を駆動するようにしてあ
る。そして、ダイヤフラムポンプ１の作動不良を抑制す
るため、上記脈動圧導入通路２の導出端部３を燃焼室へ
の吸気経路５に接続し、脈動圧導入通路２中に絞り部６
を形成してある。In this embodiment, as shown in FIG. 1, a diaphragm pump 1 is used as a fuel supply pump, and a pulsation pressure introduction passage 2 is derived from the diaphragm pump 1.
The leading end 3 of the pulsating pressure introduction passage 2 is connected to a pulsating pressure generating point 4.
The diaphragm pump 1 is driven on the basis of the pulsating pressure generated at the pulsating pressure generating point 4. Then, in order to suppress a malfunction of the diaphragm pump 1, the leading end 3 of the pulsation pressure introduction passage 2 is connected to an intake path 5 to the combustion chamber, and a throttle 6 is provided in the pulsation pressure introduction passage 2.
Is formed.
【００１１】ダイヤフラムポンプ１は、気化器１３に固
定してある。ダイヤフラムポンプ１内はダイヤフラム１
５で燃料圧送室１６と脈動圧導入室１７とに区画し、燃
焼圧送室１６を気化器１３のフロート室１８及び燃料タ
ンク９と連通させ、脈動圧導入室１７を脈動圧導入通路
２を介して吸気経路５に連通させ、吸気脈動圧によりダ
イヤフラム１５を作動させることにより、燃料タンク９
から燃料圧送室１６を経て気化器１３のフロート室１８
に燃料を供給するようにしてある。The diaphragm pump 1 is fixed to a carburetor 13. Inside the diaphragm pump 1 is the diaphragm 1
5, the combustion pressure delivery chamber 16 is divided into a fuel pressure delivery chamber 16 and a pulsation pressure introduction chamber 17, and the combustion pressure delivery chamber 16 is communicated with the float chamber 18 and the fuel tank 9 of the carburetor 13. By communicating with the intake passage 5 and operating the diaphragm 15 by the pulsating pressure of the intake air, the fuel tank 9
From the fuel pumping chamber 16 to the float chamber 18 of the carburetor 13
To supply fuel.
【００１２】この実施形態では、脈動圧導入通路２の導
出端部３に絞り部６を設け、吸気経路５から脈動圧導入
通路２への霧化燃料の侵入を抑制してある。脈動圧導入
通路２の導出端部３は、吸気経路５に向けて下向きに接
続し、脈動圧導入通路２の導出端部３で燃料が凝縮して
も、これが吸気経路５中に自然落下するようにしてあ
る。脈動圧導入通路２の導出端部３は、金属管１９で構
成し、その端部を吸気管１２にあけた接続孔２０に圧入
して固定し、この端部内に絞り部６となる円筒形オリフ
ィス２１を嵌入させてある。この円筒形オリフィス２１
は気化器１３の燃料ジェット２２を転用しており、金属
管１９の端部にねじ嵌合で固定してある。[0012] In this embodiment, the throttle portion 6 provided in the outlet end 3 of the pulsation pressure introduction passage 2, are suppressed invasion of atomization fuel from the intake passage 5 to the pulsating pressure introducing passage 2. Out end portion 3 of the pulsation pressure introduction <br/> passage 2 is connected to a downwardly toward the intake passage 5, even if condensed fuel outlet end 3 of the pulsation pressure introduction passage 2, which is in the intake passage 5 To fall naturally. The leading end 3 of the pulsating pressure introduction passage 2 is formed of a metal pipe 19, and the end of the leading end 3 is press-fitted into a connection hole 20 formed in the intake pipe 12 and fixed. The orifice 21 is fitted. This cylindrical orifice 21
Uses the fuel jet 22 of the vaporizer 13 and is fixed to the end of the metal tube 19 by screw fitting.
【００１３】図３に示す第２実施形態では、脈動圧導入
通路２の導出端部３をキリ孔２３をあけた金属棒２４で
構成し、このキリ孔２３の小径部分２５を絞り部６とし
てある。他の構成は第１実施形態と同一であり、図３
中、第１実施形態と同一の要素には同一の符号を付して
おく。また、図４に示す第３実施形態では、絞り部６に
絞り弁２６を用い、絞り抵抗の調節を行えるようにして
ある。他の構成は第１実施形態と同一であり、図４中、
第１実施形態と同一の要素には同一の符号を付してお
く。In the second embodiment shown in FIG. 3, the leading end 3 of the pulsating pressure introducing passage 2 is constituted by a metal rod 24 having a drilled hole 23, and a small diameter portion 25 of the drilled hole 23 is formed. It is provided as a throttle unit 6. Other configurations are the same as those of the first embodiment.
Among them, the same elements as those of the first embodiment are denoted by the same reference numerals. In the third embodiment shown in FIG. 4, a throttle valve 26 is used in the throttle section 6 to adjust the throttle resistance. The other configuration is the same as that of the first embodiment.
The same elements as those in the first embodiment are denoted by the same reference numerals.
【００１４】本発明の各実施形態の内容は以上の通りで
あるが、本発明は上記実施例に限定されるものではな
い。例えば、上記実施形態では、ガソリンエンジンで説
明したが、本発明は灯油エンジン等の他の火花点火式エ
ンジンにも適用できる。Although the contents of each embodiment of the present invention are as described above, the present invention is not limited to the above embodiment. For example, in the above embodiment has been described in the gasoline engine, the present invention is applicable to other spark ignition et <br/> Nji emissions such as kerosene engine.
【図１】第１実施形態の要部の縦断面図である。FIG. 1 is a longitudinal sectional view of a main part of a first embodiment.
【図２】第１実施形態の全体の正面図である。FIG. 2 is an overall front view of the first embodiment.
【図３】第２実施形態の要部の縦断面図である。FIG. 3 is a longitudinal sectional view of a main part of a second embodiment.
【図４】第３実施形態の要部の縦断面図である。FIG. 4 is a longitudinal sectional view of a main part of a third embodiment.
１…ダイヤフラムポンプ、２…脈動圧導入通路、３…導
出端部、４…脈動圧発生個所、５…吸気経路、６…絞り
部。DESCRIPTION OF SYMBOLS 1 ... Diaphragm pump, 2 ... Pulsating pressure introduction path, 3 ... Derivation end part, 4 ... Pulsating pressure generation point, 5 ... Intake path, 6 ... Throttle section.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ０４Ｂ 43/06 Ｆ０４Ｂ 43/06 Ａ (58)調査した分野(Int.Cl.7，ＤＢ名) F02M 37/00 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 7 identification code FI F04B 43/06 F04B 43/06 A (58) Field surveyed (Int.Cl. 7 , DB name) F02M 37/00
Claims (1)
プ(１)を用い、このダイヤフラムポンプ(１)から脈動圧
導入通路(２)を導出し、この脈動圧導入通路(２)の導出
端部(３)を脈動圧発生個所(４)に接続し、この脈動圧発
生個所(４)で発生する脈動圧に基づいてダイヤフラムポ
ンプ(１)を駆動するようにするとともに、シリンダヘッ
ド(１０)から導出した吸気管(１２)の導出端に気化器
(１３)を設けたエンジンの燃料供給装置において、 上記脈動圧導入通路(２)の導出端部(３)を燃焼室への吸
気経路(５)に向けて下向きに接続し、脈動圧導入通路
(２)の導出端部(３)に絞り部(６)を形成した、ことを特
徴とするエンジンの燃料供給装置。1. A diaphragm pump (1) is used as a fuel supply pump, a pulsation pressure introduction passage (2) is derived from the diaphragm pump (1), and a leading end (3) of the pulsation pressure introduction passage (2). together connected to the pulsation pressure generating point (4), so as to drive the diaphragm pump (1) on the basis of the pulsating pressure generated in the pulsation pressure generating point (4), Shirindahe'
A vaporizer at the outlet end of the intake pipe (12) derived from the
In the fuel supply device for an engine provided with (13), the leading end (3) of the pulsation pressure introduction passage (2) is connected downward toward the intake path (5) to the combustion chamber, and the pulsation pressure introduction passage is provided.
A fuel supply device for an engine , wherein a throttle portion (6) is formed at an outlet end (3) of (2) .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01342696A JP3230075B2 (en) | 1996-01-30 | 1996-01-30 | Engine fuel supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01342696A JP3230075B2 (en) | 1996-01-30 | 1996-01-30 | Engine fuel supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09209863A JPH09209863A (en) | 1997-08-12 |
| JP3230075B2 true JP3230075B2 (en) | 2001-11-19 |
Family
ID=11832820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01342696A Expired - Fee Related JP3230075B2 (en) | 1996-01-30 | 1996-01-30 | Engine fuel supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3230075B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7080374B2 (en) | 2018-05-29 | 2022-06-03 | 三菱電機株式会社 | Goods management device, goods management system, area selection method and program |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5871742B2 (en) * | 2012-07-30 | 2016-03-01 | 本田技研工業株式会社 | Fuel supply device for internal combustion engine |
-
1996
- 1996-01-30 JP JP01342696A patent/JP3230075B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7080374B2 (en) | 2018-05-29 | 2022-06-03 | 三菱電機株式会社 | Goods management device, goods management system, area selection method and program |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09209863A (en) | 1997-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4794901A (en) | Low pressure air assisted fuel injection apparatus for engine | |
| CA1320078C (en) | Vacuum bleed and flow restrictor fitting for fuel injected engines with vapor separator | |
| CA1221589A (en) | Fuel system for internal combustion engine | |
| US4699109A (en) | Closed end fuel injection system | |
| US5012787A (en) | Fuel injection system | |
| US6019075A (en) | Air and fuel delivery system for fuel injected engines | |
| US4955943A (en) | Metering pump controlled oil injection system for two cycle engine | |
| US5535724A (en) | Fuel pulsation dampener | |
| ITRM940666A1 (en) | EMISSION CONTROL SYSTEM FOR SMALL ENGINES | |
| JP3230075B2 (en) | Engine fuel supply | |
| US10890148B2 (en) | Fuel pump for an internal combustion engine | |
| US7210672B2 (en) | Accelerator apparatus for diaphragm carburetors | |
| JP3189289B2 (en) | Fuel supply system for four-stroke fuel injection engine for outboard motor | |
| US4703743A (en) | Fuel supply apparatus with fuel atomizer | |
| US5094196A (en) | System for operating two-cycle spark ignition engine | |
| EP0045316A1 (en) | System for injecting an auxiliary fluid into a cylinder of an internal combustion engine | |
| US20090000593A1 (en) | Liquid injection apparatus for engines | |
| JP2007315254A (en) | Fuel-air mixture generating device | |
| CN2169693Y (en) | Stable pressure oil supply system | |
| CA2036520A1 (en) | System for operating two-cycle spark ignition engine | |
| CA2150324A1 (en) | Fuel system for fuel injected two stroke engine | |
| CN101868613B (en) | Compact injector device with two armatures | |
| JPS603473A (en) | Fuel passage structure in carburetor | |
| JP2518033Y2 (en) | Diaphragm vaporizer | |
| KR200156347Y1 (en) | Intake system in an internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090914 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090914 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100914 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110914 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120914 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120914 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130914 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130914 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140914 Year of fee payment: 13 |
|
| LAPS | Cancellation because of no payment of annual fees |