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JP2004508491A - Fuel pumping unit - Google Patents

Fuel pumping unit Download PDF

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Publication number
JP2004508491A
JP2004508491A JP2002525360A JP2002525360A JP2004508491A JP 2004508491 A JP2004508491 A JP 2004508491A JP 2002525360 A JP2002525360 A JP 2002525360A JP 2002525360 A JP2002525360 A JP 2002525360A JP 2004508491 A JP2004508491 A JP 2004508491A
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JP
Japan
Prior art keywords
fuel
pumping unit
fuel pumping
vent valve
air
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
JP2002525360A
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Japanese (ja)
Inventor
ペーター　シュハルト
クリストフ　シュミット
カール　エック
ハンス−ユルゲン　ノイマン
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.)
Siemens AG
Original Assignee
Siemens AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7655618&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2004508491(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of JP2004508491A publication Critical patent/JP2004508491A/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
    • 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
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • 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)
  • Fuel-Injection Apparatus (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Fuel Cell (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

燃料圧送ユニット（２）では、空気抜き弁（９）が、常に燃料で充填された領域に接続されている。これによって、ガスは空気抜き弁（９）を通って燃料圧送ユニット（２）から流出する。しかしながら、空気抜き弁（９）の非シール部を介した、燃料圧送ユニット（２）の休止状態時でのガスの侵入は、確実に回避される。In the fuel pumping unit (2), the air vent valve (9) is always connected to the area filled with fuel. Thereby, the gas flows out of the fuel pumping unit (2) through the air vent valve (9). However, gas intrusion through the unsealed portion of the air vent valve (9) when the fuel pumping unit (2) is at rest is reliably avoided.

Description

【０００１】
本発明は、燃料圧送ユニットであって、燃料を吸込領域から吐出領域に圧送するために設けられた燃料ポンプと、吐出領域をシールするかまたは吐出領域を外部に接続するための空気抜き弁とが設けられている形式のものに関する。
【０００２】
このような燃料圧送ユニットは今日の自動車に頻繁に使用され、実際に公知である。燃料圧送ユニットはたいてい、ケーシング内に配置された、電動モータを備えた燃料ポンプを有していて、自動車の燃料タンクのスプラッシュポット内に組み付けられる。燃料圧送ユニットの組付け状態では、燃料ポンプと吸込領域とはケーシングの下側の端部に位置している。空気抜き弁を備えた吐出領域と、自動車の内燃機関に通じる搬送管路のための接続管片とは、ケーシングの上側の領域に配置されている。電動モータはたいてい、圧送された燃料によって通流される。
【０００３】
公知の燃料圧送ユニットには、燃料ポンプの長い休止状態の後、スプラッシュポットがほぼ空の場合に、空気が空気抜き弁を介してケーシング内に侵入し得るという欠点がある。この空気は、まず燃料ポンプの始動時に空気抜き弁を介して、圧送された燃料によって再び押し退けられなければならない。これによって、圧力形成時の時間的な遅れならびに空気と燃料との不都合な混合が生ぜしめられる。
【０００４】
本発明の課題は、燃料圧送ユニットのケーシング内への空気の侵入を回避することである。
【０００５】
この課題は、本発明によれば、空気抜き弁の、外部に近い方の端部が、燃料圧送ユニットの組付け状態で常に燃料で充填された領域に接続されていることによって解決される。
【０００６】
この構成によって、空気が空気抜き弁を介して、本発明による燃料圧送ユニットのケーシング内に侵入しないようになっている。したがって、ケーシングは燃料ポンプの長い休止状態の後でも燃料で充填されていて、燃料ポンプの始動時に空気抜きされる必要はない。最初の充填時にケーシング内に存在している空気と、燃料のガス発生によって生ぜしめられた気泡とは、妨害されることなく空気抜き弁を介してケーシングから導出することができる。
【０００７】
本発明による燃料圧送ユニットは、空気抜き弁の外部側の領域に管路が接続されており、この管路が吸込領域の近くにまで案内されている場合に構造的に特に単純に形成されている。これによって、管路の自由端部は、スプラッシュポットがほぼ空の場合でも常時燃料の内部に位置している。
【０００８】
管路は、例えば特に大きい横断面を有していてよく、最初の充填時に導出したい空気を蓄えていてよい。しかしながら、本発明による燃料圧送ユニットのケーシング内への、管路内に存在する空気の侵入は、管路が吐出領域の容積に比べて特に小さい容積を有している場合に十分回避することができる。
【０００９】
管路の蓄え容積をさらに減少させるためには、本発明の別の有利な構成によれば、管路が、空気抜き弁の近くで吸込領域に案内された折曲げ部を有している。この構成によって、管路は特に僅かな長さを有している。
【００１０】
空気抜き弁と管路とを介した本発明による燃料圧送ユニットのケーシングからの空気の逃出の妨害は、スプラッシュポット内への当該燃料圧送ユニットの組付け状態で管路の自由端部がスプラッシュポットの底部から予め規定された間隔を有している場合に、簡単に回避することができる。
【００１１】
本発明によって、数多くの構成が可能となる。本発明の基本原理をさらにわかりやすくするために、以下に、本発明の１つの構成を図面につき詳しく説明する。
【００１２】
図１には、自動車の燃料タンクの底部領域が概略的に示してある。燃料タンク内には、２段式の燃料ポンプ３を有する燃料圧送ユニット２を備えたスプラッシュポット１が挿入されている。燃料ポンプ３は、燃料を燃料タンクからスプラッシュポット１内に圧送するための前段４と、燃料をスプラッシュポット１から、燃料圧送ユニット２のケーシング６の上側の部分に配置された吐出領域７に圧送するための主段５とを有している。わかりやすくするために、燃料の流れは図面に矢印で示してある。ケーシング６の、吐出領域７を有する部分には、自動車の内燃機関に通じる搬送管路（図示せず）のための接続管片８が配置されている。さらに、ケーシング６は空気抜き弁９を有している。この空気抜き弁９は吐出領域７を外部、つまり、燃料圧送ユニット２を取り囲む環境に接続していて、吐出領域７からの気泡の逃出を可能にしている。吐出領域７が完全に燃料で充填されている場合には、空気抜き弁９は閉鎖している。空気抜き弁９の外部側の端部には、管路１０が接続されている。この管路１０は、スプラッシュポット１の底部の直前にまで案内されていて、ひいては常に燃料で充填された領域に案内されている。
【００１３】
吐出領域７の空気抜き時には、ガスが空気抜き弁９と管路１０とを通って吐出領域７から流出する。自動車の停止状態ひいては燃料圧送ユニット２の休止状態では、燃料を備えた領域内に至るまで案内された管路１０によって、空気が空気抜き弁９の非シール部を通って吐出領域７に到達し得ることが阻止される。これによって、燃料圧送ユニット２の新たな始動時には、特に迅速な圧力形成が行われる。
【００１４】
最後に念のために付言しておくが、上述したスプラッシュポット１とは、車両傾斜時やカーブ走行時でも常に燃料を確保して圧送することができるように燃料タンク内に設けられた小さい容器を意味している。
【図面の簡単な説明】
【図１】
自動車の燃料タンクの底部領域を概略的に示した図である。[0001]
The present invention is a fuel pumping unit, which includes a fuel pump provided for pumping fuel from a suction region to a discharge region, and an air vent valve for sealing the discharge region or connecting the discharge region to the outside. Regarding the type provided.
[0002]
Such fuel pumping units are frequently used in today's motor vehicles and are known in practice. The fuel pumping unit usually has a fuel pump with an electric motor, which is arranged in the casing and is mounted in the splash pot of the fuel tank of the motor vehicle. When the fuel pumping unit is assembled, the fuel pump and the suction area are located at the lower end of the casing. The discharge area with the air vent valve and the connecting piece for the conveying line leading to the internal combustion engine of the motor vehicle are arranged in the upper area of the housing. Electric motors are usually flowed by pumped fuel.
[0003]
Known fuel pumping units have the disadvantage that, after a long idle state of the fuel pump, if the splash pot is almost empty, air can enter the casing via the bleed valve. This air must first be displaced again by the pumped fuel via the bleed valve at the start of the fuel pump. This results in a time delay during pressure build-up as well as an undesired mixing of air and fuel.
[0004]
An object of the present invention is to prevent air from entering the casing of a fuel pumping unit.
[0005]
According to the invention, this object is achieved in that the end of the vent valve close to the outside is always connected to the area filled with fuel in the assembled state of the fuel pumping unit.
[0006]
This arrangement prevents air from entering the casing of the fuel pumping unit according to the invention via the vent valve. Thus, the casing is filled with fuel even after a long rest of the fuel pump and does not need to be deflated when the fuel pump is started. The air present in the casing at the time of the first filling and the bubbles created by the outgassing of the fuel can be led out of the casing via the vent valve without interruption.
[0007]
The fuel-feeding unit according to the invention has a particularly simple construction in the case of a line connected to the area outside the air bleed valve, which line is guided close to the suction area. . Thus, the free end of the line is always inside the fuel, even when the splash pot is almost empty.
[0008]
The conduit may have, for example, a particularly large cross section and may store the air which is to be withdrawn during the first filling. However, the ingress of air present in the pipeline into the casing of the fuel pumping unit according to the invention can be sufficiently avoided if the pipeline has a particularly small volume compared to the volume of the discharge area. it can.
[0009]
In order to further reduce the storage volume of the line, according to another advantageous refinement of the invention, the line has a fold guided in the suction area near the vent valve. With this configuration, the conduit has a particularly small length.
[0010]
Disturbance of the escape of air from the casing of the fuel pumping unit according to the invention via the air bleed valve and the line is caused by the fact that the free end of the line in the state of assembly of the fuel pumping unit into the splash pot Can be easily avoided if there is a predefined spacing from the bottom of the
[0011]
Many configurations are possible with the present invention. In order to make the basic principle of the present invention more understandable, one configuration of the present invention will be described below in detail with reference to the drawings.
[0012]
FIG. 1 schematically shows the bottom region of a fuel tank of a motor vehicle. A splash pot 1 having a fuel pumping unit 2 having a two-stage fuel pump 3 is inserted into the fuel tank. The fuel pump 3 pumps the fuel from the fuel tank into the splash pot 1 at a former stage 4 and feeds the fuel from the splash pot 1 to a discharge area 7 arranged in an upper portion of the casing 6 of the fuel pumping unit 2. And a main stage 5 for performing the operation. For clarity, the flow of fuel is indicated by arrows in the drawing. In the part of the casing 6 having the discharge area 7, a connecting piece 8 for a conveying line (not shown) leading to the internal combustion engine of the motor vehicle is arranged. Furthermore, the casing 6 has an air vent valve 9. The air vent valve 9 connects the discharge area 7 to the outside, that is, the environment surrounding the fuel pumping unit 2, and allows the escape of bubbles from the discharge area 7. When the discharge area 7 is completely filled with fuel, the air vent valve 9 is closed. A pipe 10 is connected to an outer end of the air vent valve 9. This conduit 10 is guided up to just before the bottom of the splash pot 1 and is thus always guided in the area filled with fuel.
[0013]
When the air is discharged from the discharge area 7, the gas flows out of the discharge area 7 through the air release valve 9 and the pipe 10. In the stopped state of the motor vehicle and thus in the idle state of the fuel pumping unit 2, the air can reach the discharge area 7 through the non-sealed part of the air bleed valve 9 by the conduit 10 guided into the area provided with fuel. Is prevented. In this way, a particularly rapid pressure build-up takes place when the fuel pumping unit 2 is newly started.
[0014]
Lastly, as a reminder, the above-mentioned splash pot 1 is a small container provided in a fuel tank so that fuel can always be secured and pumped even when the vehicle is inclined or running on a curve. Means
[Brief description of the drawings]
FIG.
FIG. 2 schematically shows a bottom region of a fuel tank of a motor vehicle.

Claims (5)

燃料圧送ユニットであって、燃料を吸込領域から吐出領域に圧送するために設けられた燃料ポンプと、吐出領域をシールするかまたは吐出領域を外部に接続するための空気抜き弁とが設けられている形式のものにおいて、空気抜き弁（９）の、外部に近い方の端部が、当該燃料圧送ユニット（２）の組付け状態で常に燃料で充填された領域に接続されていることを特徴とする、燃料圧送ユニット。A fuel pumping unit, comprising: a fuel pump provided for pumping fuel from a suction region to a discharge region; and an air vent valve for sealing the discharge region or connecting the discharge region to the outside. In the type, the end closer to the outside of the air vent valve (9) is always connected to a region filled with fuel when the fuel pumping unit (2) is assembled. , Fuel pumping unit. 空気抜き弁（９）の、外部に近い方の端部に管路（１０）が接続されており、該管路（１０）が、吸込領域の近くにまで案内されている、請求項１記載の燃料圧送ユニット。2. The line according to claim 1, wherein a line (10) is connected to the end of the air bleeding valve (9) which is close to the outside, and the line (10) is guided close to the suction area. Fuel pumping unit. 管路（１０）が、吐出領域（７）の容積に比べて特に小さい容積を有している、請求項１または２記載の燃料圧送ユニット。3. The fuel pumping unit according to claim 1, wherein the conduit has a particularly small volume compared to the volume of the discharge area. 管路（１０）がＵ字形に曲げられている、請求項１から３までのいずれか１項記載の燃料圧送ユニット。4. The fuel pumping unit according to claim 1, wherein the conduit (10) is bent in a U-shape. 管路（１０）の自由端部が、スプラッシュポット（１）内への当該燃料圧送ユニット（２）の組付け状態で、該スプラッシュポット（１）の底部から予め規定された間隔を有している、請求項１から４までのいずれか１項記載の燃料圧送ユニット。The free end of the conduit (10) has a predetermined distance from the bottom of the splash pot (1) when the fuel pumping unit (2) is installed in the splash pot (1). The fuel pumping unit according to any one of claims 1 to 4, wherein:
JP2002525360A 2000-09-09 2001-08-16 Fuel pumping unit Pending JP2004508491A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10044609A DE10044609B4 (en) 2000-09-09 2000-09-09 Fuel delivery unit
PCT/DE2001/003132 WO2002020973A1 (en) 2000-09-09 2001-08-16 Fuel supply unit

Publications (1)

Publication Number Publication Date
JP2004508491A true JP2004508491A (en) 2004-03-18

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ID=7655618

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002525360A Pending JP2004508491A (en) 2000-09-09 2001-08-16 Fuel pumping unit

Country Status (11)

Country Link
US (1) US20040013537A1 (en)
EP (1) EP1315898B1 (en)
JP (1) JP2004508491A (en)
KR (1) KR100768599B1 (en)
CN (1) CN100385105C (en)
AT (1) ATE268866T1 (en)
AU (1) AU2001283801A1 (en)
BR (1) BR0113733A (en)
DE (2) DE10044609B4 (en)
ES (1) ES2223000T3 (en)
WO (1) WO2002020973A1 (en)

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Publication number Priority date Publication date Assignee Title
KR101271377B1 (en) 2007-08-10 2013-06-07 현대자동차주식회사 Fuel Pump for LPI Vehicle

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ATE268866T1 (en) 2004-06-15
DE50102542D1 (en) 2004-07-15
DE10044609B4 (en) 2004-11-04
BR0113733A (en) 2003-07-29
CN1623035A (en) 2005-06-01
EP1315898B1 (en) 2004-06-09
WO2002020973A1 (en) 2002-03-14
KR20030036726A (en) 2003-05-09
US20040013537A1 (en) 2004-01-22
DE10044609A1 (en) 2002-06-27
EP1315898A1 (en) 2003-06-04
ES2223000T3 (en) 2005-02-16
AU2001283801A1 (en) 2002-03-22
CN100385105C (en) 2008-04-30
KR100768599B1 (en) 2007-10-18

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