EP1475534A2 - Véhicule automobile avec moteur à combustion interne fonctionnant à carburant diesel - Google Patents

Véhicule automobile avec moteur à combustion interne fonctionnant à carburant diesel Download PDF

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Publication number
EP1475534A2
EP1475534A2 EP04101438A EP04101438A EP1475534A2 EP 1475534 A2 EP1475534 A2 EP 1475534A2 EP 04101438 A EP04101438 A EP 04101438A EP 04101438 A EP04101438 A EP 04101438A EP 1475534 A2 EP1475534 A2 EP 1475534A2
Authority
EP
European Patent Office
Prior art keywords
fuel
filter
area
internal combustion
connection
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.)
Withdrawn
Application number
EP04101438A
Other languages
German (de)
English (en)
Inventor
André Rösgen
Klaus Mack
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
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 Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1475534A2 publication Critical patent/EP1475534A2/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/36—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements with bypass 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/48—Filters structurally associated with fuel valves

Definitions

  • the invention relates to a motor vehicle with a diesel fuel and their alternative products operated Combustion engine.
  • motor vehicles often have fuel filter arrangements on how, for example, in the D 199 43 240 A1 are described.
  • the diesel fuel will through the fuel filter assembly to the injection pump of the Internal combustion engine promoted.
  • At cold temperatures occurs often the phenomenon of gumming, in which the fuel filter assembly due to solid diesel fuel clogged. To avoid this problem are expensive Heating systems have been proposed.
  • the object of the invention is a generic motor vehicle to provide that improves at low temperatures operated.
  • a fuel filter arrangement is on the Motor vehicle provided a filter housing with a therein arranged fuel filter, which has the filter housing separates into a clean side and a raw side.
  • the filter housing is in the area of the clean side with an outlet connection to the injection pump.
  • an inlet connection is provided which is via a fuel line is connected to a fuel tank.
  • a pressure-dependent openable and closable bypass valve intended.
  • the invention provides for a fuel prefilter a feed pump a bypass valve that is pressure-dependent opens by itself.
  • the bypass valve according to the invention is arranged so that a bypass is created when the corresponding one Pre-filter, for example, due to stains cannot be flowed through sufficiently.
  • Arrangement of the bypass valve a differential pressure built that opens the bypass valve. To this Way, fuel can bypass the filter from the Fuel pump promoted to the injection system of the internal combustion engine become.
  • One of the basic ideas of the invention is that the Fuel delivered through the fuel filter assembly often sufficient by the heating devices provided there is liquefied by the additional by the invention Bypass valve to keep fuel flowing so that this is from the injection system of the internal combustion engine can be processed without major problems.
  • the additional by the invention Bypass valve to keep fuel flowing so that this is from the injection system of the internal combustion engine can be processed without major problems.
  • internal combustion engines can operate with very low heating outputs still be operated at outside temperatures at which Motor vehicles known in the prior art are no longer reliable work.
  • Fuel passes through, but no longer for operation of the internal combustion engine is sufficient with the invention significantly improved operation guaranteed.
  • the bypass valve is preferably according to the invention as check valve designed to be opened against a spring pressure, that is particularly easy to manufacture.
  • the invention is also implemented in a filter head which can be used in connection with a filter housing.
  • the outlet connection is in the filter head as a continuous one Outlet bore formed, which are particularly easy to manufacture leaves.
  • the check valve is in the outlet bore arranged that this in a passband and divided into a wake area.
  • One each Connection opening between the trailing area and the raw side or between the pass area and the clean side represents the invention Flow ready. At the same time it becomes a enables easy manufacture.
  • the trailing area sealed from the outside by a screw plug be provided in the relevant part of the outlet bore is.
  • the invention can then be implemented particularly advantageously, if there is a heating hole in the area of the outlet hole for receiving a heating element or for flushing with heated Cooling water of the internal combustion engine is provided.
  • FIG. 1 shows a schematic representation of an inventive Fuel system 1 one not in this view shown motor vehicle according to the invention.
  • the fuel system 1 is divided into a fuel tank 2, in which a fuel delivery line 3 and a fuel return line 4 mouths.
  • the fuel delivery line 3 leads to an inventive Fuel filter arrangement 5, which is in a filter housing 6 with a fuel filter not shown in this view, divided into a filter head 7 and a bypass valve 8.
  • a feed line 9 leads from the fuel filter arrangement 5 to a fuel pump 10.
  • the fuel pump 10 delivers Via an injection pump line 11 fuel to an in injection pump not shown in this view. excess Fuel is returned through the fuel return line 4 transported into the fuel tank 2.
  • the fuel filter arrangement 5 has the area of the foot of the Filter housing 6 a shell heater 12 in the form of heating wires on to a power supply not shown in this view are connected.
  • a head heater 13 in the form of electrical wires provided that also not in this view shown power supply is supplied with electrical energy becomes.
  • the fuel delivery line 3 opens into a first T-piece 14, that with one end at an inlet port 15 of the filter head 7 is connected. There the inlet connection ends in Area of the raw side of the fuel filter that is not visible here. Starting from the clean side of the Fuel filter opens an outlet port 16 on the outside the filter head 7 into a second T-piece 17th
  • the bypass valve 8 is designed as a ball check valve that in the direction flows through from the first T-piece 14 to the second T-piece 17 can be. There are other designs of the bypass valve 8 conceivable. In one direction from the second tee 17 to the first T-piece 14 is the passage through the bypass valve 8 locked.
  • the bypass valve 8 is regarding of the opening pressure so that it is in an area between 0.3 bar and 0.5 bar - preferably at 0.35 bar - Pressure difference opens and the passage from the first T-piece 14 to the second T-piece 17 releases.
  • the fuel system 1 behaves as follows.
  • the fuel pump 10 During normal operation, the fuel pump 10 generates Delivery line 9 a negative pressure. With completely vented Fuel filter assembly 5 is through the second T-piece 17th a negative pressure is generated at the outlet connection 16. Because of this Underpressure is fuel through the filter housing 6 sucked from the raw side to the clean side of the fuel filter. Through the inlet port 15 through the first T-piece 14 and 3 fuel via the fuel delivery line tracked out of the fuel tank 2. In normal operation the bypass valve 8 remains closed because of the the friction losses in the fuel filter arrangement 5 Pressure difference between the inlet connection 15 and the outlet port 16 is less than the opening pressure of the Bypass valve 8.
  • a pressure relief valve provided in the fuel pump 10 carries excess fuel that is not through the injection pump line 11 to be delivered to the injection pump can, via the fuel return line 4 back into the Fuel tank 2.
  • bypass valve 8 opens and fuel passes through the fuel delivery line 3 the T-piece 14 and via the bypass valve 8 into the delivery line 9 a.
  • the fuel flow originating from the bypass valve 8 also crystallized out Diesel crystals with the smaller fuel flow mixed, which after heating from the outlet connection 16 exits. This ensures that there is still enough Fuel flows in the delivery line 9 to the Keep the internal combustion engine running.
  • FIG. 2 shows a cross section through a further invention
  • Fuel filter assembly 5 ' which is essentially into a filter housing 6 'with a fuel filter inserted therein 20 and divided into a filter head 7 '.
  • the filter head 7 ' is designed as a one-piece metal part.
  • a continuous outlet bore runs through the filter head 7 21, which opens into an outlet port 16 '. about an inlet connection not shown in this view in the Filter head 7 'in the filter housing 6' fuel from an in this view, not shown fuel tank supplied, and on the outside of the fuel filter 20.
  • connection bore 22 extends transversely to the outlet bore 21 inside a connection piece 23. Immediately to the connection hole 21 delimits inside the outlet bore 21 Valve shoulder 24 on. The valve shoulder 24 divides the outlet bore 21 in the interior against a trailing area 25.
  • the follow-up area 25 stands over a follow-up bore 26 in the filter head 7 'in connection with the filter housing 6'.
  • a ball check valve 27 is a bypass valve used. It can also be designed as a ball valve his.
  • the outlet bore 21 sealed to the outside with a screw plug 28.
  • the fuel filter 20 has an upper end plate 29 and one lower end plate 30. Between the upper end plate 29 and the lower end plate 30 is a circulating filter medium 31 provided. The fuel filter 20 is with the upper end plate 29 screwed onto the connecting piece 23 of the filter head 7 '.
  • the fuel filter arrangement 5 works like follows. During normal operation, fuel can be at the outlet bore 21 are sucked in, which passes through the fuel filter 20. If the fuel in the filter medium 31 becomes contaminated is no longer sufficiently flowed through, so that a negative pressure builds up on the ball check valve 27. is the vacuum is large enough, then the ball check valve opens 27 and fuel escapes from the outside of the fuel filter 20 from the filter housing 6 'on the Follow-up bore 26 into the follow-up area 25. From there it passes through the opened ball check valve 27 and it occurs together with that emerging through the connection bore 22 Fuel out of the outlet bore 21. Thereby it is ensured that there is still fuel from the outlet bore 21 exit.
  • FIG 3 shows a cross section through a further invention Fuel filter arrangement 5 ′′, in one direction from above onto the filter housing, which is not visible here. you see here a section through a filter head 7 '' of the fuel filter arrangement 5 ''.
  • the fuel filter assembly 5 " essentially corresponds to the fuel filter arrangement 5 'from Figure 2. Parts with the same functionality are therefore designated with the same reference numbers. In this View you can see particularly well that essentially parallel a heating bore 35 is provided for the outlet bore 21, in which inserted a heating element not shown in this view can be.
  • This view also shows that the fuel filter arrangement 5 "particularly simply modular can be manufactured, for example, by an existing casting made of die-cast aluminum with just a few processing steps to a filter head 7 '' according to the invention can be.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP04101438A 2003-04-11 2004-04-07 Véhicule automobile avec moteur à combustion interne fonctionnant à carburant diesel Withdrawn EP1475534A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10317017A DE10317017A1 (de) 2003-04-11 2003-04-11 Kraftfahrzeug mit einem mit Dieselkraftstoff betriebenen Verbrennungsmotor
DE10317017 2003-04-11

Publications (1)

Publication Number Publication Date
EP1475534A2 true EP1475534A2 (fr) 2004-11-10

Family

ID=32981127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101438A Withdrawn EP1475534A2 (fr) 2003-04-11 2004-04-07 Véhicule automobile avec moteur à combustion interne fonctionnant à carburant diesel

Country Status (2)

Country Link
EP (1) EP1475534A2 (fr)
DE (1) DE10317017A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017462A1 (fr) 2007-06-21 2009-01-21 Ford Global Technologies, LLC Procédé et appareil pour nettoyer une ligne de fluide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926806A (en) * 1974-06-10 1975-12-16 Schroeder Brothers No-bypass filter system
DE19602082B4 (de) * 1996-01-20 2004-04-08 Mann + Hummel Gmbh Kraftstoffmodul
US6024869A (en) * 1998-01-22 2000-02-15 Donaldson Company, Inc. Spin-on filter assembly with valve arrangements
GB9802747D0 (en) * 1998-02-09 1998-04-08 Chainings Ltd Fuel filter
DE19809989A1 (de) * 1998-03-09 1999-09-16 Mann & Hummel Filter Ventil für eine Filteranordnung und ein Verfahren zu dessen Herstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017462A1 (fr) 2007-06-21 2009-01-21 Ford Global Technologies, LLC Procédé et appareil pour nettoyer une ligne de fluide

Also Published As

Publication number Publication date
DE10317017A1 (de) 2004-10-21

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