EP0307739B1 - Deaerator for fuel installation in internal combustion engines - Google Patents

Deaerator for fuel installation in internal combustion engines 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
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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)
French (fr)
Other versions
EP0307739A2 (en
EP0307739A3 (en
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
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Daimler Benz AG
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Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0307739A2 publication Critical patent/EP0307739A2/en
Publication of EP0307739A3 publication Critical patent/EP0307739A3/en
Application granted granted Critical
Publication of EP0307739B1 publication Critical patent/EP0307739B1/en
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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)

Description

Die Erfindung bezieht sich auf eine Entlüftungsvorrichtung in einer Kraftstoffanlage für luftverdichtende Einspritzbrennkraftmaschinen, nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.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.

Aus der DE 29 52 016 A1 ist eine derartige Kraftstoffanlage bekannt, bei der in der die Vorlauf- mit der Rücklaufleitung verbindenden Leitung ein entgegen der Rückströmung schließendes Rückschlagventil mit einem federbelasteten Schließglied angeordnet ist. Durch dieses Rückschlagventil wird beim Wiederauffüllen eines leergefahrenen Kraftstoffbehälters verhindert, daß hieraus verdrängte Luft bzw. Gase über die Rücklaufleitung in den Kraftstoffilter und in die Vorlaufleitung gelangen können. Außerdem kann bei Kraftstofförderung mitgeführte Luft über das Rückschlagventil in die Rücklaufleitung abgeführt werden.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. In addition, air carried along when fuel is being conveyed can be discharged into the return line via the check valve.

Bei dieser bekannten Ausführung ergibt sich ebenso wie bei derjenigen nach der DE 85 22 528 U1 jedoch der Nachteil, daß bei der Kraftstofförderung neben der Luft auch Kraftstoff über das Rückschlagventil abgeführt wird. Die Folge ist eine Verminderung des Förderdrucks und somit eine Beeinträchtigung des störungsfreien Betriebes der Einspritzpumpe.In this known embodiment, as in the case of that according to DE 85 22 528 U1, however, there is the disadvantage that, in addition to air, fuel is also discharged via the check valve when fuel is being conveyed. The result is a reduction in the delivery pressure and thus an impairment of the trouble-free operation of the injection pump.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs beschriebene Entlüftungsvorrichtung mit einfachen Mitteln dahingehend zu verbessern, daß unter Beibehaltung der einwandfreien Funktion des Rückschlagventiles bei Stillstand der Brennkraftmaschine auch eine dauerhaft wirkende Entlüftung ohne gleichzeitigen Kraftstoffübertritt während des Betriebes der Brennkraftmaschine sichergestellt ist.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.

Zur Lösung der Aufgabe dienen die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale.The features specified in the characterizing part of patent claim 1 serve to achieve the object.

Durch die erfindungsgemäßen Maßnahmen ergibt sich eine ventilartige Funktion. Sobald die Förderpumpe pumpt, baut sich in der Vorlaufleitung ein Druck auf, der das Schließglied vom eingangsseitigen Ventilsitz abhebt, derart, daß bereits im Kraftstoffsystem befindliche Luft aufgrund des geringen Strömungswiderstandes dieses Schließglied ungehindert umströmend sehr schnell in den angeschlossenen Rücklauf und somit in den Tank entweicht. Bevor Kraftstoff übertreten kann, wird aufgrund des höheren Strömungswiderstandes zum Schließglied dieses weiter angehoben und weitgehend dichtend gegen den ausgangsseitigen Ventilsitz gepreßt. Die im normalen Fahrbetrieb aus dem Kraftstoff kontinuierlich austretenden, im Filteroberteil gesammelten Gase können in dieser Stellung des Schließgliedes weiterhin entweichen, ohne daß nennenswerte Kraftstoffmengen durchtreten. Sobald die Kraftstoffanlage drucklos ist, kommt das Schließglied durch die Schwerkraft auf dem gegenüberliegenden Ventilsitz zur Anlage und bewirkt eine Abdichtung in Gegenrichtung, so daß die vorherige Verbindung zwischen Vorlauf- und Rücklaufleitung zuverlässig unterbrochen und die Rückströmung unterbunden ist.The measures according to the invention result in a valve-like function. As soon as the feed pump pumps, 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 . Before fuel can overflow, 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. As soon as the fuel system is depressurized, 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.

Aus der US-A-4 079 717 ist eine Kraftstoffanlage mit einem Rückschlagventil bekannt, das in einer von der Vorlaufleitung zwischen einem Druckhalteventil und einer Kraftstoffeinspritzdüse abzweigenden Rücklaufleitung angeordnet ist und mit seinem Schließglied einerseits bei druckloser Kraftstoffanlage eine Rückströmung von der Rücklauf- in die Vorlaufleitung verhindert und andererseits bei Kraftstofförderung anfangs mitgeführte Luft in die Rücklaufleitung abführt und dann im normalen Fahrbetrieb die Verbindung zwischen der Vorlauf- und Rücklaufleitung gänzlich unterbricht.From US-A-4 079 717 a fuel system with a check valve is known, 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 On the one hand, 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.

Eine dauerhaft wirkende Entlüftung während des Betriebes der Brennkraftmaschine ist bei dieser Ausführung nicht möglich, da das Schließglied gegen den ausgangsseitigen Ventilsitz abdichtend anliegt und somit bei Fahrzeugerschütterungen auftretende Gase bis zur Einspritzdüse mitgeführt werden.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.

In dem Unteranspruch ist noch eine förderliche Weiterbildung der Erfindung beansprucht.In the subclaim a further development of the invention is claimed.

Die Erfindung wird an zwei Ausführungsbeispielen näher erläutert. Es zeigen

Fig. 1
eine Kraftstoffanlage mit integrierter Entlüftungsvorrichtung als doppeltwirkendes Umschaltventil
Fig. 2
in vergrößertem Maßstab dieses Umschaltventil und
Fig. 3
das Umschaltventil mit federbelastetem Schließglied.
The invention is explained in more detail using two exemplary embodiments. Show it
Fig. 1
a fuel system with integrated ventilation device as a double-acting changeover valve
Fig. 2
on an enlarged scale this switching valve and
Fig. 3
the changeover valve with spring-loaded closing element.

Eine mit 1 bezeichnete Kraftstoffanlage für eine luftverdichtende Einspritzbrennkraftmaschine 2 enthält eine Entlüftungsvorrichtung, die als doppeltwirkendes Umschaltventil 3 ausgebildet und in ein Kraftstoffilter 4 so eingesetzt ist, daß eine von einer Förderpumpe 5 ausgehende und an dem Kraftstoffilter 4 angeschlossene und ungefilterten Kraftstoff enthaltende Vorlaufleitung 6 mit einer Rücklaufleitung 7 verbindbar ist, die von einer Hochdruckeinspritzpumpe 8 zu einem Kraftstofftank 9 führt. Das Umschaltventil 3 besteht aus einem in das Kraftstoffilter 4 eingeschraubten Hohlschraubenkörper mit einer zentral verlaufenden abgestuften Sackbohrung 10, deren Abstufung einen obenliegenden Ventilsitz 11 bildet. Ein untenliegender Ventilsitz 12 ist durch einen in die Sackbohrung 10 eingepreßten Ring 13 gebildet.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.

Zwischen beiden Ventilsitzen 11 und 12 ist ein Schließglied 14 frei bewegbar angeordnet, das je nach Betriebszustand der Brennkraftmaschine 2 an einem der beiden Ventilsitze 11, 12 anliegt. Das Schließglied 14 ist gemäß Fig. 2 eine Kugel, es kann aber auch ein plattenförmiges Teil sein. Die Kugel weist eine definierte Oberflächenrauhigkeit auf, durch die grundsätzlich Entlüftungsgase über die Sackbohrung 10 und eine durchgehende Querbohrung 15 dem Hohlschraubenkörper übertreten können. Ein Ringstück 16 stellt die Verbindung der Querbohrung 15 zur Rücklaufleitung 7 her.Between the two valve seats 11 and 12, 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.

Anstelle einer aufgerauhten Kugel für den Durchlaß der Entlüftungsgase kann der Ventilsitz 11 eine definierte Oberflächenrauhigkeit oder eine oder mehrere kleine Kerben aufweisen, ohne daß nennenswerte Kraftstoffmengen mit abgeführt werden. Durch selbstreinigende Wirkung der feinen Durchgänge beim Öffnen der Kugel - die Brennkraftmaschine ist stillgesetzt und der Kraftstoffdruck zusammengefallen -werden Verstopfungsgefahren vermieden. Die Entlüftung ist dauerhaft sichergestellt. Der untenliegende Ventilsitz 13 sowie die Kugel haben die Funktion eines Rückschlagventiles. Um hierbei eine zuverlässige Trennung zwischen der Rücklaufleitung 7 und der Vorlaufleitung 6 zu ermöglichen, kann die Kugel durch eine Feder 17 belastet sein. Die Federkraft ist hierbei gering, so daß der Öffnungsdruck während der Kraftstofförderung kleiner ist als derjenige des Überströmventils (nicht dargestellt) an der Einspritzpumpe 8.Instead of a roughened ball for the passage of the ventilation gases, the valve seat 11 can have a defined surface roughness or one or more small notches without significant amounts of fuel being removed. The self-cleaning effect of the fine passages when the ball is opened - the internal combustion engine is stopped and the fuel pressure has collapsed - prevents the risk of clogging. The ventilation is permanently ensured. The valve seat 13 below and the ball have the function of a check valve. In order to enable a reliable separation between the return line 7 and the supply line 6, 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.

Claims (2)

  1. A breather device in a fuel system for air-compressing fuel-injected engines and with, provided for the quantity to be vented and disposed upstream of a fuel filter (4), a port communicating on the outlet side with a return pipe (7) leading from a high pressure injection pump (8) to a fuel tank (9) and on the inlet side, via a non-return valve, with a feed line (6) emerging from a delivery pump (5) and leading via the fuel filter (4) to the high pressure injection pump (8), its closure member (14) coming to bear on the valve seat (12) which faces the inlet of the port to break the connection between the feed and return lines, characterised in that at the outlet of the port there is an additional valve seat (11) for the same closure member (14) and in that this valve seat (11) or the closure member (14) is provided with a roughened bearing surface or the valve seat is provided with at least one notch so that in each case the closure member comes to bear on this valve seat (11) only under delivery pressure and then in a gas-permeable but substantially fluid-tight manner.
  2. A breather device according to claim 1 in which the non-return valve containing the closure member is constructed as a hollow screw member which is inserted rigidly into the fuel filter (4) and which has a centrally extending and stepped blind bore (10), characterised in that the step in the blind bore (10) forms the valve seat (11) disposed at the outlet of the port, while the valve seat (12) disposed at the inlet to the port is formed by a ring (13) pressed into the blind bore (10).
EP88114398A 1987-09-17 1988-09-03 Deaerator for fuel installation in internal combustion engines Expired - Lifetime EP0307739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3731206 1987-09-17
DE19873731206 DE3731206A1 (en) 1987-09-17 1987-09-17 BLEEDING DEVICE FOR A FUEL SYSTEM OF INTERNAL COMBUSTION ENGINES

Publications (3)

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

Family

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Application Number Title Priority Date Filing Date
EP88114398A Expired - Lifetime EP0307739B1 (en) 1987-09-17 1988-09-03 Deaerator for fuel installation in internal combustion engines

Country Status (2)

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EP (1) EP0307739B1 (en)
DE (1) DE3731206A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4032377A1 (en) * 1990-10-12 1992-04-16 Daimler Benz Ag Compression-ignition engine fuel system - has changeover valve in by=pass pipe downstream of lift pump
GB9415950D0 (en) * 1994-08-06 1994-09-28 Rover Group A fuel feed system for an internal combustion engine
DE19616493B4 (en) * 1995-05-05 2005-08-11 Volkswagen Ag Ventilation device on a fuel filter
DE19629627C2 (en) * 1996-07-23 1998-09-10 Daimler Benz Ag Safety device to prevent fuel leakage
GB2327460B (en) 1997-07-23 2000-10-25 Pall Corp Engine fuel systems
DE19849718A1 (en) * 1998-10-28 2000-05-04 Bayerische Motoren Werke Ag Fuel delivery system
DE19947063A1 (en) * 1999-09-30 2001-04-05 Siemens Ag Injection system for an internal combustion engine
AT408480B (en) 1999-12-07 2001-12-27 Hoerbiger Hydraulik THROTTLE CHECK VALVE AND METHOD FOR THE PRODUCTION THEREOF
FR2818322B1 (en) 2000-12-14 2003-06-27 Filtrauto FUEL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINE AND FUEL FILTER FOR SUCH A DEVICE
SE520210C2 (en) * 2001-10-10 2003-06-10 Volvo Lastvagnar Ab Combination valve for a fuel system for an internal combustion engine and such a fuel system
BR0311989B1 (en) * 2002-06-19 2012-12-11 fuel injection system for an internal combustion engine.
TR200704439T1 (en) * 2005-07-07 2007-12-24 Ford Otomot�V Sanay� Anon�M ��Rket� Fuel filter head
GB2441309B (en) * 2006-08-18 2011-03-30 Parker Hannifin Corp De-aeration system
CN102734016A (en) * 2011-04-11 2012-10-17 派克汉尼汾液压系统(上海)有限公司 Fuel oil filter and fuel oil filter seat
CN104500294A (en) * 2014-12-29 2015-04-08 江铃汽车股份有限公司 Exhaust structure of high-pressure oil pump
DE102016219486A1 (en) * 2016-10-07 2018-04-12 Robert Bosch Gmbh Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system
DE102018003797A1 (en) * 2018-05-09 2019-11-14 Hydac Fluidcarecenter Gmbh Fuel delivery device

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DE2952016A1 (en) * 1979-12-22 1981-06-25 Daimler-Benz Ag, 7000 Stuttgart Diesel engine fuel filter - has feed and injection pump connections and return flow connection, with non-return valve opening towards tank

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DE1979410U (en) * 1966-07-16 1968-02-22 Daimler Benz Ag FUEL CONVEYOR DEVICE FOR INJECTION COMBUSTION MACHINES.
DE2344002A1 (en) * 1973-08-31 1975-03-06 Hatz Motoren FUEL INJECTION ENGINE
DE2356399A1 (en) * 1973-11-12 1975-05-15 Hatz Motoren FUEL INJECTION ENGINE
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 (en) * 1985-08-05 1985-10-10 Jenbacher Werke Vertriebsgesellschaft mbH, 7016 Gerlingen Device for the automatic venting of fuel lines in diesel engines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952016A1 (en) * 1979-12-22 1981-06-25 Daimler-Benz Ag, 7000 Stuttgart Diesel engine fuel filter - has feed and injection pump connections and return flow connection, with non-return valve opening towards tank

Also Published As

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

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