EP0307739B1 - Désaérateur pour une installation de carburant des moteurs à combustion interne - Google Patents

Désaérateur pour une installation de carburant des moteurs à combustion interne Download PDF

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Publication number
EP0307739B1
EP0307739B1 EP88114398A EP88114398A EP0307739B1 EP 0307739 B1 EP0307739 B1 EP 0307739B1 EP 88114398 A EP88114398 A EP 88114398A EP 88114398 A EP88114398 A EP 88114398A EP 0307739 B1 EP0307739 B1 EP 0307739B1
Authority
EP
European Patent Office
Prior art keywords
valve seat
fuel
port
closure member
valve
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 - Lifetime
Application number
EP88114398A
Other languages
German (de)
English (en)
Other versions
EP0307739A3 (en
EP0307739A2 (fr
Inventor
Karl-H. Siebels
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0307739A2 publication Critical patent/EP0307739A2/fr
Publication of EP0307739A3 publication Critical patent/EP0307739A3/de
Application granted granted Critical
Publication of EP0307739B1 publication Critical patent/EP0307739B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means
    • 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
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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

Definitions

  • the invention relates to a ventilation device in a fuel system for air-compressing internal combustion engines, according to the features specified in the preamble of claim 1.
  • Such a fuel system is known from DE 29 52 016 A1, in which a non-return valve closing against the backflow and having a spring-loaded closing element is arranged in the line connecting the flow line to the return line.
  • This check valve prevents refilled air or gases from being able to get into the fuel filter and the supply line via the return line when refilling an empty fuel tank.
  • air carried along when fuel is being conveyed can be discharged into the return line via the check valve.
  • the invention has for its object the ventilation device described above with simple means to be improved in such a way that, while maintaining the proper functioning of the check valve when the internal combustion engine is at a standstill, permanent ventilation is ensured without simultaneous fuel transfer during operation of the internal combustion engine.
  • the measures according to the invention result in a valve-like function.
  • a pressure builds up in the feed line, which lifts the closing element from the inlet-side valve seat, such that air already in the fuel system, due to the low flow resistance, allows this closing element to flow freely around the connected return line and thus into the tank .
  • the closing element raises it further due to the higher flow resistance and presses it largely sealingly against the valve seat on the outlet side.
  • the gases continuously escaping from the fuel during normal driving and collected in the upper part of the filter can continue to escape in this position of the closing member without significant amounts of fuel passing through.
  • the closing member comes into contact with gravity on the opposite valve seat and effects a seal in the opposite direction, so that the previous connection between the supply and return lines is reliably interrupted and the backflow is prevented.
  • a fuel system with a check valve which is arranged in a return line branching from the supply line between a pressure control valve and a fuel injection nozzle and with it
  • the closing member prevents backflow from the return line into the supply line when the fuel system is not under pressure and, on the other hand, when the fuel is being conveyed, it removes air initially carried into the return line and then completely cuts off the connection between the supply and return lines during normal driving.
  • a permanent ventilation during operation of the internal combustion engine is not possible in this embodiment, since the closing element is sealing against the valve seat on the outlet side and gases which occur during vehicle vibrations are carried along to the injection nozzle.
  • a fuel system designated 1 for an air-compressing injection internal combustion engine 2 contains a ventilation device which is designed as a double-acting changeover valve 3 and is inserted into a fuel filter 4 in such a way that an unfiltered fuel supply line 6 starting from a feed pump 5 and connected to the fuel filter 4 contains unfiltered fuel Return line 7 can be connected, which leads from a high-pressure injection pump 8 to a fuel tank 9.
  • the changeover valve 3 consists of a hollow screw body screwed into the fuel filter 4 with a centrally running stepped blind bore 10, the stepping of which forms an overhead valve seat 11.
  • An underlying valve seat 12 is formed by a ring 13 pressed into the blind bore 10.
  • a closing member 14 is arranged such that it can move freely, depending on the operating state of the internal combustion engine 2, against one of the two valve seats 11, 12.
  • 2 is a ball, but it can also be a plate-shaped part.
  • the ball has a defined surface roughness through which vent gases can in principle pass over the hollow screw body via the blind bore 10 and a continuous transverse bore 15.
  • a ring piece 16 connects the transverse bore 15 to the return line 7.
  • the valve seat 11 can have a defined surface roughness or one or more small notches without significant amounts of fuel being removed.
  • the ventilation is permanently ensured.
  • the valve seat 13 below and the ball have the function of a check valve.
  • the ball can be loaded by a spring 17. The spring force is low, so that the opening pressure during fuel delivery is lower than that of the overflow valve (not shown) on the injection pump 8.

Landscapes

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

Claims (2)

  1. Dispositif de désaération dans une installation de carburant pour des moteurs à combustion interne, à injection et compression d'air, comportant un passage prévu pour les gaz de désaération, disposé en amont d'un filtre de carburant (4) et qui est relié par sa sortie avec un conduit de retour (7), partant d'une pompe d'injection haute pression (8) pour aboutir à un réservoir de carburant (9), et par son entrée, par l'intermédiaire d'un clapet antiretour, avec un conduit d'admission (6) partant d'une pompe de refoulement (5) et aboutissant par l'intermédiaire du filtre de carburant (4) à la pompe d'injection haute pression (8), l'organe obturateur (14) du clapet venant s'appliquer contre le siège de soupape (12), dirigé vers l'entrée du passage, en coupant la liaison entre le conduit d'admission et le conduit de retour, caractérisé en ce qu'il est prévu à la sortie du passage un siège de soupape additionnel (11) pour le même organe obturateur (14) et en ce que ce siège de soupape (11) ou l'organe obturateur (14) est pourvu d'une surface d'appui rendue rugueuse, ou bien le siège de soupape est pourvu d'au moins une saignée de telle sorte que respectivement l'organe obturateur s'applique simplement sous l'effet de la pression de refoulement contre ce siège de soupape (11) en laissant passer les gaz mais en étant cependant pratiquement étanche au liquide.
  2. Dispositif de désaération selon la revendication 1, dans lequel le clapet antiretour comportant l'organe obturateur est agencé comme une pièce en forme de vis creuse qui est fixée solidement dans le filtre de carburant (4) et qui comporte un trou borgne (10) disposé au centre et de profil étagé, dispositif caractérisé en ce que le gradin du trou borgne (10) constitue le siège de soupape (11) disposé à la sortie du passage tandis que le siège de soupape (12) situé à l'entrée du passage est constitué par une bague (13) emmanchée dans le trou borgne (10).
EP88114398A 1987-09-17 1988-09-03 Désaérateur pour une installation de carburant des moteurs à combustion interne Expired - Lifetime EP0307739B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873731206 DE3731206A1 (de) 1987-09-17 1987-09-17 Entlueftungsvorrichtung fuer eine kraftstoffanlage von brennkraftmaschinen
DE3731206 1987-09-17

Publications (3)

Publication Number Publication Date
EP0307739A2 EP0307739A2 (fr) 1989-03-22
EP0307739A3 EP0307739A3 (en) 1989-05-31
EP0307739B1 true EP0307739B1 (fr) 1992-11-11

Family

ID=6336203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114398A Expired - Lifetime EP0307739B1 (fr) 1987-09-17 1988-09-03 Désaérateur pour une installation de carburant des moteurs à combustion interne

Country Status (2)

Country Link
EP (1) EP0307739B1 (fr)
DE (1) DE3731206A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4032377A1 (de) * 1990-10-12 1992-04-16 Daimler Benz Ag Kraftstoffversorgungseinrichtung mit einer entlueftungsvorrichtung fuer eine luftverdichtende brennkraftmaschine
GB9415950D0 (en) * 1994-08-06 1994-09-28 Rover Group A fuel feed system for an internal combustion engine
DE19616493B4 (de) * 1995-05-05 2005-08-11 Volkswagen Ag Entlüftungseinrichtung an einem Kraftstoffilter
DE19629627C2 (de) * 1996-07-23 1998-09-10 Daimler Benz Ag Sicherheitsvorrichtung zur Vermeidung des Kraftstoffaustritts
GB2327460B (en) 1997-07-23 2000-10-25 Pall Corp Engine fuel systems
DE19849718A1 (de) * 1998-10-28 2000-05-04 Bayerische Motoren Werke Ag Kraftstoff-Fördersystem
DE19947063A1 (de) * 1999-09-30 2001-04-05 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
AT408480B (de) 1999-12-07 2001-12-27 Hoerbiger Hydraulik Drosselrückschlagventil und verfahren zu dessen herstellung
FR2818322B1 (fr) 2000-12-14 2003-06-27 Filtrauto Dispositif d'alimentation en carburant pour moteur a combustion interne et filtre a carburant pour un tel dispositif
SE520210C2 (sv) * 2001-10-10 2003-06-10 Volvo Lastvagnar Ab Kombinationsventil vid ett bränslesystem för en förbränningsmotor samt dylikt bränslesystem
JP4340627B2 (ja) * 2002-06-19 2009-10-07 ボルボ ラストバグナー アーベー 内燃機関用燃料噴射装置
WO2007007260A2 (fr) * 2005-07-07 2007-01-18 Ford Otomotiv Sanayi Anonim Sirketi Tete de filtre a carburant
GB2441309B (en) 2006-08-18 2011-03-30 Parker Hannifin Corp De-aeration system
CN102734016A (zh) * 2011-04-11 2012-10-17 派克汉尼汾液压系统(上海)有限公司 燃油滤清器及燃油滤清器座
CN104500294A (zh) * 2014-12-29 2015-04-08 江铃汽车股份有限公司 一种高压油泵的排气结构
DE102016219486A1 (de) * 2016-10-07 2018-04-12 Robert Bosch Gmbh Drosselelement, insbesondere für eine Hochdruckpumpe, insbesondere eines Niederdruckkreis eines Kraftstoffeinspritzsystems
DE102018003797A1 (de) * 2018-05-09 2019-11-14 Hydac Fluidcarecenter Gmbh Kraftstofffördervorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952016A1 (de) * 1979-12-22 1981-06-25 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffilter fuer luftverdichtende einspritzbrennkraftmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1979410U (de) * 1966-07-16 1968-02-22 Daimler Benz Ag Brennstoff-foerdereinrichtung fuer einspritzbrennkraftmaschinen.
DE2344002A1 (de) * 1973-08-31 1975-03-06 Hatz Motoren Einspritzbrennkraftmaschine
DE2356399A1 (de) * 1973-11-12 1975-05-15 Hatz Motoren Einspritzbrennkraftmaschine
JPS521231A (en) * 1975-06-23 1977-01-07 Nissan Motor Co Ltd Fuel injection device equipped with air evacuator
GB2157803B (en) * 1984-04-25 1988-05-18 Facet Enterprises Vent-relief valve for a wet motor gerotor fuel pump
DE8522528U1 (de) * 1985-08-05 1985-10-10 Jenbacher Werke Vertriebsgesellschaft mbH, 7016 Gerlingen Vorrichtung zum selbsttätigen Entlüften von Kraftstoffleitungen von Dieselmotoren

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952016A1 (de) * 1979-12-22 1981-06-25 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffilter fuer luftverdichtende einspritzbrennkraftmaschinen

Also Published As

Publication number Publication date
DE3731206C2 (fr) 1990-07-05
EP0307739A3 (en) 1989-05-31
EP0307739A2 (fr) 1989-03-22
DE3731206A1 (de) 1989-03-30

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