WO2020099423A1 - Système de carburant - Google Patents

Système de carburant Download PDF

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Publication number
WO2020099423A1
WO2020099423A1 PCT/EP2019/081053 EP2019081053W WO2020099423A1 WO 2020099423 A1 WO2020099423 A1 WO 2020099423A1 EP 2019081053 W EP2019081053 W EP 2019081053W WO 2020099423 A1 WO2020099423 A1 WO 2020099423A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
filter
channel
filter element
ring
Prior art date
Application number
PCT/EP2019/081053
Other languages
German (de)
English (en)
Inventor
Michael Braunheim
Original Assignee
Mahle International 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 Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2020099423A1 publication Critical patent/WO2020099423A1/fr

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
    • F02M37/22—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
    • F02M37/42—Installation or removal of filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/29—Filter cartridge constructions
    • B01D2201/291—End caps
    • B01D2201/295—End caps with projections extending in a radial outward direction, e.g. for use as a guide, spacing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4046—Means for avoiding false mounting of different parts

Definitions

  • the present invention relates to a fuel system with a fuel filter with a filter housing according to the preamble of claim 1.
  • the invention also relates to an internal combustion engine with such a fuel system.
  • a pin arranged in this way on an end plate often closes a so-called idle channel, which is connected to a fuel tank.
  • Ring filter element is arranged, which has a first axially projecting pin on a first end plate, by means of which it is correctly in the
  • Filter housing inserted ring filter element in a first
  • EP 2 029 885 B1 discloses a fuel filter for a fuel system of an internal combustion engine with a filter housing with an inlet on the raw side, an outlet on the clean side and a return on the raw side, a filter element with a closure element being arranged in the filter housing, which is properly inserted into the filter housing used filter element closes the return with its closure element.
  • a fluid filter with a filter housing is known from DE 10 2013 015 143 B4, which has at least one inlet and at least one outlet and an annular filter element arranged in the filter housing.
  • the filter housing has at least one discharge opening which, when the fluid filter is ready for operation, is closed by a closure element arranged on the ring filter element.
  • Fuel tank is supplied. A promotion of fuel for
  • the internal combustion engine cannot take place as a result.
  • the internal combustion engine would therefore start despite the lack of a ring filter element.
  • the present invention is therefore concerned with the problem of specifying an improved or at least an alternative embodiment for a fuel system of the generic type, in particular an embodiment
  • the present invention is based on the general idea of providing a ring filter element with a closure element which closes a first channel in the installed state in a fuel filter arranged on the suction side of a fuel pump of a fuel system, the first channel being open to the environment or to a pressure side of the fuel pump, so that when a ring filter element is not used, it is not possible to draw fuel from a fuel tank.
  • the fuel filter has a filter housing in which a ring filter element is arranged, which has a first axially projecting pin (closure element) on a first end plate, by means of which it engages in the ring filter element correctly inserted into the filter housing and tightly closes the channel on the filter housing side.
  • Ring filter element closes the first pin to the first channel to the environment or the connecting channel from the suction side of the fuel pump to
  • Ring filter element can not. If the internal combustion engine is thus started with no ring filter element, the fuel pump draws air from the environment or from a pressure side of the fuel pump and pumps fuel in a circle, in both cases reliably delivering the fuel to the internal combustion engine and thereby starting it.
  • the Fuel system according to the invention is thus for the first time possible to implement engine starting protection in a structurally simple, inexpensive and at the same time reliable manner with a fuel filter arranged on the suction side. Another advantage of this engine start protection is that the engine start protection is implemented without components in the flow path from the tank to the internal combustion engine
  • Pressure loss would generate and the amount of fuel that is fed by the fuel pump when operating without a ring filter element is limited to the amount that is already in the fuel system between the
  • Fuel filter or the first channel and the fuel pump is located. There is no suction of fuel from the tank, nor is there any fuel system delivery.
  • a second fuel filter is arranged on the pressure side of the fuel pump, in which a
  • Ring filter element is arranged, which has a first axially projecting pin on a first end plate, by means of which it engages in a correctly inserted ring filter element in a first channel and seals it tightly.
  • the first channel is connected to the suction side of the fuel pump, so that if the ring filter element is not used, it is not possible to build up pressure in the second fuel filter because the fuel delivered flows directly back to the suction side.
  • the engine starting protection can hereby be strengthened further, since without pressure build-up, no fuel flows to the internal combustion engine and therefore the engine cannot be started.
  • the first channel opens into the surroundings and a check valve which is continuous in the direction of the fuel filter is arranged in the first channel. If the internal combustion engine is thus started with no ring filter element, this opens
  • Check valves are inexpensive and reliable. At the same time, this check valve prevents fuel from escaping when not in use
  • the check valve is a flap valve or a spring-loaded valve
  • the first pin is arranged centrally or eccentrically on the first end plate.
  • an eccentric arrangement of the first pin on the first end plate enables a key-lock principle to be implemented, since authorized ring filter elements must have the first pin at a precisely predefined point in order to reliably and tightly close the first channel when installed in the filter housing to be able to.
  • a suitable geometric shape or a correspondingly selected diameter can be used to authorize additional criteria
  • Ring filter elements are created. The use of such authorized ring filter elements is of great importance for protecting the internal combustion engine
  • End plate of the ring filter element is provided with a second axially projecting pin, by means of which the ring filter element is correctly inserted into the filter housing
  • a second filter housing side channel engages in a second filter housing side channel and seals it tightly.
  • a second channel on the filter housing side can be designed, for example, as a return channel into a fuel tank or generally a reservoir or as an idle channel, which is also connected to the fuel tank or a reservoir.
  • the key-lock principle described in the previous paragraph can be further refined by the arrangement or design of the second channel or the associated second pin.
  • a guide ramp is expediently provided in the filter housing, which cooperates with a guide element arranged on the ring filter element, for example the first or second pin.
  • a guide ramp can be used to feed the first pin to the first channel and, if available, the second pin to the second channel.
  • Filter housing In general, such a guide ramp can also be used as a
  • Ring filter element engaging dome may be formed, in which case, for example, a radially inwardly projecting guide element is arranged on an inner frame of the ring filter element.
  • Training or design of the guide ramp or the guide element facilitate the assembly of the filter device and also secure the
  • the present invention is further based on the general idea of specifying an internal combustion engine with such a fuel system, the fuel filter being arranged on the suction side of the fuel pump. With the filter device described above, engine start protection can be done
  • the check valve may prevent fuel from escaping if the pressure in the fuel filter is higher than in the environment.
  • FIG. 1 shows a fuel system according to the invention with a fuel filter arranged on the suction side of a fuel pump
  • Fig. 3 is a sectional view through an embodiment of a
  • Fig. 4 is a sectional view through a filter device in the region of a lower end plate with a pin for closing an idle channel.
  • FIG. 5 shows a fuel system according to the invention with a second one additionally arranged on the pressure side of a fuel pump
  • a fuel system 1 according to the invention of an internal combustion engine 2 has a fuel pump 3 and a fuel filter 4 with a filter housing 5, in which an annular filter element 6 is arranged (cf. in particular FIGS. 2 to 5).
  • the ring filter element 6 has a first axially projecting pin 8 on a first end disk 7, by means of which it engages in a first filter housing-side channel 9 when the ring filter element 6 is correctly inserted into the filter housing 5 and seals it tightly.
  • Fuel filter 4 is connected on the raw side to a fuel tank 10.
  • the fuel filter 4 is arranged on the suction side 19 to the fuel pump 3, that is, upstream the same.
  • the first channel 9 is additionally connected to the surroundings (see FIGS. 2 and 3) or to a pressure side 20 of the
  • FIG. 1 a graphical representation of the flow guidance in the motor starting protection is drawn with symbols in the box 11 drawn with broken lines.
  • Check valve 12 allows air to be sucked in from the environment, provided that the ring filter element 6 is not or not correctly inserted into the filter housing 5 of the fuel filter 4 and therefore the first pin 8 does not seal the first channel 9 tightly.
  • the check valve 12 can be designed, for example, as an inexpensive flap valve, as shown in FIG. 2.
  • it can of course also be designed as a ball valve, as shown in FIGS. 1 and 2, the first channel 9 with the pressure side of FIG.
  • Fuel pump 2 is connected, but theoretically could also lead to the environment.
  • Ball valves or flap valves of this type are usually spring-loaded and have the great advantage that the internal combustion engine 2 starts when the ring filter element is not inserted or is incorrectly inserted 6 is avoided, as is leakage of fuel with a pressurized fuel filter 4.
  • the first channel 9 is connected to the pressure side 20 of the fuel pump 3, so that in this case, if the ring filter element 6 is not used in the fuel filter 4, the fuel would be pumped in a circle without fuel reaches the internal combustion engine 2 or can be sucked out of the fuel tank 10.
  • the first pin 8 can be arranged centrally or eccentrically on the first end plate 7, the eccentric arrangement being shown, for example, according to FIGS. 1 to 3. With a central arrangement, a comparatively complicated feeding of the pin 8 into the first channel 9 can advantageously be dispensed with.
  • End plate 13 (see FIG. 4) can be a second axially projecting pin 14
  • the second filter housing-side channel 15 can be designed, for example, as an idling channel.
  • the second pin 14 can also be eccentric or central on the first end plate 7 or, as shown in FIG. 4, on the second,
  • a guide ramp 16 can be provided on the filter housing 5, which is connected to the
  • Ring filter element 6 arranged guide element 17 cooperates, wherein the first or the second pin 8, 14 can be formed as such a guide element 17. 4 is the second pin 14 as such
  • Guide element 17 formed.
  • a guide ramp 16 with a slot can also be arranged on a function carrier, wherein an associated guide element 17 can be designed as a nose on an inner frame of the ring filter element 6, 6 '.
  • a second fuel filter 4 ′ arranged on the pressure side 20 of the fuel pump 3 is also provided, for this
  • a pressure-side engine start-up protection 18 can be implemented by closing the return line 23 to the fuel tank 10.
  • the first channel 9 can also be connected to a clean side of the fuel filter 4 '.
  • the first channel 9 can be in the flow direction 21 before or after the fuel filter 4 to the
  • the first channel 9 can be open to the environment if one is in it
  • Check valve 12 is arranged and its opening pressure is so small that due to a geodetic between the fuel level in the fuel tank 10 and the fuel filter 4, air instead of fuel is sucked in during operation of the fuel pump 3.
  • the opening pressure of the check valve 12 depends on the geodetic height of the prefilter to the tank 10, the following rule of thumb being:
  • Opening pressure ⁇ 80 mbar / m (geodetic height).
  • Fuel filter 4 is installed, because in this case by the fuel pump 3rd either air is sucked in via the first channel 9 communicating with the environment, or else fuel is pumped in a circle without this being conveyed to the internal combustion engine 2.
  • Engine start protection for a second fuel filter 4 'arranged on the pressure side 20 of the fuel pump 3 is realized in that the first channel 9' with the
  • the suction side 19 of the fuel pump 3 is connected, so that in this case, if the ring filter element 6 'is not used in the fuel filter 4', the fuel would be pumped in a circuit without fuel being used
  • the first channel 9 ′ can connect to the pressure side 20 in the flow direction 21 before or after the second fuel filter 4 ′ and / or can communicate with the suction side 19 in the flow direction 21 before or after the fuel filter 4 be.
  • a ring filter element 6 for a previously described fuel system 1 in which the surface of the pin 8 forms a pipe channel section.
  • the surface of pin 8 is pressurized.
  • pin 8 Surface quality of the pin 8 is required in order to effect a tight closure of the first channel 9, 9 '.
  • special seals on pin 8 can be used, which act like a closure element. Only a ring filter element 6 with a predefined pin 8 is able to to close the first channel 9 reliably. Unauthorized ring filter elements therefore do not enable trouble-free operation.
  • the surface of the pin 8 takes over a pressurized part of the channel guide, whereby the perfect sealing function of the pin 8 in the first channel 9 is particularly important. So far, the channel was always the return channel in the fuel tank, which was not pressurized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un système de carburant (1) ayant une pompe à carburant (3) et un filtre à carburant (4) muni d'un boîtier (5) dans lequel est disposé un élément de filtrage annulaire (6) qui comprend, au niveau d'une première plaque d'extrémité (7), une première broche (8) axialement déportée au moyen de laquelle, lorsque l'élément de filtrage annulaire (6) est correctement installé dans le boîtier (5) du filtre, l'élément est inséré dans un premier canal (9) côté boîtier du filtre et ferme celui-ci de manière étanche, le filtre à carburant (4) étant relié côté tube à un réservoir de carburant (10). La présente invention est caractérisée en ce que - le filtre à carburant (4) est disposé côté aspiration de la pompe à carburant (3), - le premier canal (9) est relié à l'environnement ou à un côté sous pression de la pompe à carburant (3) de sorte que, lorsque l'élément de filtrage annulaire (6) n'est pas installé, une aspiration de carburant depuis le réservoir de carburant (10) n'est pas possible. Cela permet d'obtenir une protection contre le démarrage d'un moteur côté aspiration.
PCT/EP2019/081053 2018-11-13 2019-11-12 Système de carburant WO2020099423A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018219351.7 2018-11-13
DE102018219351.7A DE102018219351A1 (de) 2018-11-13 2018-11-13 Kraftstoffsystem

Publications (1)

Publication Number Publication Date
WO2020099423A1 true WO2020099423A1 (fr) 2020-05-22

Family

ID=68610187

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/081053 WO2020099423A1 (fr) 2018-11-13 2019-11-12 Système de carburant

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DE (1) DE102018219351A1 (fr)
WO (1) WO2020099423A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110017650A1 (en) * 2007-12-21 2011-01-27 Uwe Grass Liquid filter, especially oil filter
EP1974786B1 (fr) 2007-02-23 2013-07-31 Mahle International GmbH Filtre liquide
EP2029885B1 (fr) 2006-06-16 2014-03-05 MAHLE International GmbH Filtre à carburant
WO2014148986A1 (fr) * 2013-03-22 2014-09-25 Scania Cv Ab Système de carburation pour moteur à combustion et procédé d'échange d'un élément de filtre dans un système de carburation
DE102013015143B4 (de) 2013-09-13 2016-05-25 Mann + Hummel Gmbh Filter für Fluid, Filterelement und Filtergehäuse eines Filters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015207231B4 (de) * 2015-04-21 2017-09-14 Mahle International Gmbh Filtereinrichtung
DE102016224159A1 (de) * 2016-12-05 2018-06-07 Mahle International Gmbh Ringfilterelement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2029885B1 (fr) 2006-06-16 2014-03-05 MAHLE International GmbH Filtre à carburant
EP1974786B1 (fr) 2007-02-23 2013-07-31 Mahle International GmbH Filtre liquide
US20110017650A1 (en) * 2007-12-21 2011-01-27 Uwe Grass Liquid filter, especially oil filter
WO2014148986A1 (fr) * 2013-03-22 2014-09-25 Scania Cv Ab Système de carburation pour moteur à combustion et procédé d'échange d'un élément de filtre dans un système de carburation
DE102013015143B4 (de) 2013-09-13 2016-05-25 Mann + Hummel Gmbh Filter für Fluid, Filterelement und Filtergehäuse eines Filters

Also Published As

Publication number Publication date
DE102018219351A1 (de) 2020-05-14

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