JPS60156963A - Method of supplying fuel to engine - Google Patents

Method of supplying fuel to engine

Info

Publication number
JPS60156963A
JPS60156963A JP1137984A JP1137984A JPS60156963A JP S60156963 A JPS60156963 A JP S60156963A JP 1137984 A JP1137984 A JP 1137984A JP 1137984 A JP1137984 A JP 1137984A JP S60156963 A JPS60156963 A JP S60156963A
Authority
JP
Japan
Prior art keywords
fuel
air
tank
engine
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.)
Pending
Application number
JP1137984A
Other languages
Japanese (ja)
Inventor
Yoshiya Kamozawa
鴨沢　凱也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Carburetor Co Ltd
Original Assignee
Nippon Carburetor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Carburetor Co Ltd filed Critical Nippon Carburetor Co Ltd
Priority to JP1137984A priority Critical patent/JPS60156963A/en
Publication of JPS60156963A publication Critical patent/JPS60156963A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/12—Feeding by means of driven pumps fluid-driven, e.g. by compressed combustion-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PURPOSE:To prevent vapor from being generated, by feeding air pressurized by an air pump into a fuel tank to raise the internal pressure of the tank so that fuel is transferred under air pressure. CONSTITUTION:Upon operation of an engine 1 and air pump is driven to feed pressurized air into a fuel tank 5 so that the internal pressure of the tank 5 is increased to pressurize fuel which is therefore transferred under pressure through a fuel passage 6 to a constant fuel level chamber in a carburettor 3. With this arrangement the fuel system from the fuel tank 5 to the intake-air passage has no fuel pump inlet side which produces vacuum, thereby it may be made difficult to generate vapor even high temperature operation.

Description

【発明の詳細な説明】 本発明は自動車用および汎用のエンジンに燃料を供給す
る方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of fueling automotive and general purpose engines.

燃料タンクの燃料を燃料ポンプによって吸引し加圧して
吸気路内に霧化状態で送入しエンジンに供給するシステ
ムにおいては、燃料ポンプは機械力または電気力によっ
て駆動され或いはエンジンのクランクケースや吸気管の
脈動圧で駆動されポンプ室の容積が変化することによっ
て燃料を吸込み吐出する構造となっている。即ち、ポン
プ室容積が増大する行程において生じる負圧を利用して
燃料タンクの燃料を吸込むものであるため、燃料の吸込
管とポンプ室とは負圧になっていて燃料に溶存している
空気が気泡となっていわゆるベーパを発生しやすい構造
である。また、燃料殊にガソリンのベーパ発生は温度と
も密接な関係があって１周知のように高温になるはどベ
ーパな発生しやすい。従って、高温時において燃料ポン
プ吸込側でベーパが容易に発生して燃料ポンプの吐出能
力を劣化させ、エンジンに所要量の燃料を供給すること
ができないという問題を生じる。In systems that supply fuel from a fuel tank to the engine by suctioning fuel from a fuel tank, pressurizing it, and sending it into the intake passage in an atomized state, the fuel pump is driven by mechanical or electrical power, or is connected to the engine crankcase or intake air. The structure is such that fuel is sucked in and discharged by changing the volume of the pump chamber driven by the pulsating pressure of the pipe. In other words, since the fuel in the fuel tank is sucked in by using the negative pressure generated during the stroke in which the pump chamber volume increases, the fuel suction pipe and the pump chamber are under negative pressure, and the air dissolved in the fuel forms bubbles. This is a structure that tends to generate so-called vapor. Furthermore, the generation of vapor from fuel, especially gasoline, is closely related to temperature, and as is well known, the higher the temperature, the more vapor is likely to be generated. Therefore, vapor is easily generated on the suction side of the fuel pump at high temperatures, degrading the discharge capacity of the fuel pump and causing a problem that the required amount of fuel cannot be supplied to the engine.

本発明はこのような問題を解決し、燃料タンクから吸気
路へ至る燃料系内で負圧によるベーパ発生の心配がない
燃料供給方法を提供するもので、エンジン運転時に空気
ポンプを駆動し、この空気ポンプで加圧した圧力空気を
燃料タンクへ送入してその内圧を高め、燃料を圧力空気
によって圧送することを特徴とイクルまたはニサイクル
のエンジンＩＫ＠気管２および気化器３かうなる吸気路
４が接続され、気化器３の恒油面室と燃料タンク５の底
部とが燃料通路６によって接続されている。The present invention solves these problems and provides a fuel supply method that eliminates the risk of vapor generation due to negative pressure in the fuel system from the fuel tank to the intake passage. It is characterized by supplying pressurized air pressurized by an air pump to the fuel tank to increase its internal pressure, and then pumping the fuel using the pressurized air.A one-cycle or two-cycle engine IK @ trachea 2, carburetor 3, and intake passage 4. The constant oil level chamber of the carburetor 3 and the bottom of the fuel tank 5 are connected by a fuel passage 6.

空気ボンダ７は従来の燃料ボンダと同様の構成であって
、エンジン運転に同調して機械力または電気力によって
駆動されるか或いはエンジン運転時に発生するエンジン
１のクランクケースや吸気管２の脈動圧で駆動され、空
気を加圧して燃料タンク５の頂部に接続した空気通路８
によって燃料タンク５の内部の空気部分９へ送入するよ
うになっている。The air bonder 7 has the same configuration as a conventional fuel bonder, and is driven by mechanical or electric power in synchronization with engine operation, or is driven by pulsating pressure in the crankcase or intake pipe 2 of the engine 1 that occurs during engine operation. An air passage 8 connected to the top of the fuel tank 5 by pressurizing air and connected to the top of the fuel tank 5
The air is introduced into the air portion 9 inside the fuel tank 5 by the air flow.

尚、燃料タンク５の頂部には安全弁１０が設けてあって
、空気部分９が一定以上の高圧とならないようにしであ
る。また、気化器３と燃料タンク５との落差が大きい場
合には燃料通路６に補助の燃料ポンプ１１す設けて空気
部分９の空気圧力な安全範囲内にとどめて燃料供給が充
分に行えるようにしである。A safety valve 10 is provided at the top of the fuel tank 5 to prevent the air portion 9 from reaching a high pressure above a certain level. In addition, if the head difference between the carburetor 3 and the fuel tank 5 is large, an auxiliary fuel pump 11 is installed in the fuel passage 6 to keep the air pressure of the air portion 9 within a safe range and to ensure sufficient fuel supply. It is.

このように構成した本実施態様によると。According to this embodiment configured in this way.

エンジン１の運転時に空気ポンプ７が駆動されて燃料タ
ンク５に圧力空気が送入され、内圧を高めて燃料を加圧
し燃料通路６を経て気化器３の恒油面室に圧送するので
ある。When the engine 1 is operating, the air pump 7 is driven to feed pressurized air into the fuel tank 5 to increase the internal pressure and pressurize the fuel, which is then forced into the constant oil level chamber of the carburetor 3 through the fuel passage 6.

従って９本発明によると燃料タンクから吸気路へ至る燃
料系に負圧な発生する燃料ボング吸込側が存在せず、燃
料は圧力空気によって圧送されるので高温時においても
ベーパが発生しにくくなるばかりか、燃料通路構成が簡
単なものとなるとともに燃料漏れの心配がなくなり、更
に燃料タンク内の燃料がエンジン運転に伴って減少して
もその間空気ポンプによって圧力空気が送入されるため
常に充分に高い内圧を保持し、エンジンに所要量の燃料
を安定よく供給できるのである。Therefore, according to the present invention, there is no fuel bong suction side where negative pressure is generated in the fuel system from the fuel tank to the intake passage, and the fuel is fed under pressure by pressurized air, which not only makes it difficult to generate vapor even at high temperatures. , the fuel passage structure is simple and there is no need to worry about fuel leakage, and even if the fuel in the fuel tank decreases as the engine operates, the air pump continues to supply pressurized air, so it is always kept at a sufficiently high level. This allows the internal pressure to be maintained and the required amount of fuel to be stably supplied to the engine.

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

図面は本発明の実施態様な示す説明図である。 １・・・・・・エンジン、４・・・・・・吸気路、５・
・・・・・燃料タンク、６・−・・・・燃料通路、７・
・・・・・空気ポンプ、８・・・・・・空気通路。The drawings are explanatory diagrams showing embodiments of the present invention. 1...Engine, 4...Intake path, 5.
...Fuel tank, 6...Fuel passage, 7.
...Air pump, 8...Air passage.

Claims (1)

【特許請求の範囲】[Claims] エンジン運転時に空気ポンプを駆動し、この空気ポンプ
で加圧した圧力空気を燃料タンクへ送入してその内圧を
高め、燃料を圧力空気によって圧送することを特徴とす
るエンジンの燃料供給方法。A fuel supply method for an engine, characterized in that an air pump is driven during engine operation, pressure air pressurized by the air pump is sent to a fuel tank to increase its internal pressure, and fuel is force-fed by the pressure air.
JP1137984A 1984-01-25 1984-01-25 Method of supplying fuel to engine Pending JPS60156963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1137984A JPS60156963A (en) 1984-01-25 1984-01-25 Method of supplying fuel to engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1137984A JPS60156963A (en) 1984-01-25 1984-01-25 Method of supplying fuel to engine

Publications (1)

Publication Number Publication Date
JPS60156963A true JPS60156963A (en) 1985-08-17

Family

ID=11776374

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1137984A Pending JPS60156963A (en) 1984-01-25 1984-01-25 Method of supplying fuel to engine

Country Status (1)

Country Link
JP (1) JPS60156963A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005166355A (en) * 2003-12-01 2005-06-23 Matsushita Electric Works Ltd Fuel cell system
KR20200033955A (en) 2017-10-31 2020-03-30 글로브라이드 가부시키가이샤 Fishing rod with rod body with mounting parts installed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005166355A (en) * 2003-12-01 2005-06-23 Matsushita Electric Works Ltd Fuel cell system
KR20200033955A (en) 2017-10-31 2020-03-30 글로브라이드 가부시키가이샤 Fishing rod with rod body with mounting parts installed

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