EP1264082A2 - Filtre pour liquide, notamment filtre a huile - Google Patents

Filtre pour liquide, notamment filtre a huile

Info

Publication number
EP1264082A2
EP1264082A2 EP01911399A EP01911399A EP1264082A2 EP 1264082 A2 EP1264082 A2 EP 1264082A2 EP 01911399 A EP01911399 A EP 01911399A EP 01911399 A EP01911399 A EP 01911399A EP 1264082 A2 EP1264082 A2 EP 1264082A2
Authority
EP
European Patent Office
Prior art keywords
filter
flange
liquid
inlet
filter housing
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.)
Granted
Application number
EP01911399A
Other languages
German (de)
English (en)
Other versions
EP1264082B1 (fr
Inventor
Peter Baumann
Thomas Brieden
Hans Gebert
Markus Layer
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.)
Mahle Filtersysteme GmbH
Original Assignee
Mahle Filtersysteme 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 Filtersysteme GmbH filed Critical Mahle Filtersysteme GmbH
Publication of EP1264082A2 publication Critical patent/EP1264082A2/fr
Application granted granted Critical
Publication of EP1264082B1 publication Critical patent/EP1264082B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F01M2011/031—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means
    • F01M2011/033—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means comprising coolers or heat exchangers

Definitions

  • Liquid filters especially oil filters
  • the invention relates to a liquid filter, in particular oil filter for cleaning lubricating oil, in particular for internal combustion engines of motor vehicles.
  • a liquid filter which has a ring filter insert accommodated in a plastic filter housing, a feed channel supplying raw liquid and a return channel discharging pure liquid.
  • the inlet channel and the return channel are arranged in a collecting space of the filter housing and this collecting space is delimited by a safety wall which radially encompasses the inlet channel and the return channel and is made in one piece with the filter housing.
  • the filter housing must be fastened tightly to a component that has an inlet for uncleaned oil and an outlet for cleaned oil.
  • the filter housing is usually attached to the engine block of the internal combustion engine. Problems can arise with a sealed attachment of a plastic filter housing to this component, since there are relatively high pressures in the inlet and outlet.
  • An oil filter is known from DE 39 03 675 C2, the filter housing of which contains a filter receiving space in an upper section for accommodating a ring filter insert and an inlet channel for unpurified oil and an outlet channel for cleaned oil in a lower section.
  • the filter housing with the channels integrated therein is usually made in one piece from metal as an injection molded component. In this way, the necessary pretensioning and pressing forces can be introduced into the metal housing in order to achieve a sufficient sealing effect with axially acting seals.
  • careful reworking of the injection molded component is required. During the machining of the metal housing, cavities can occur due to porosities and cavities, which in turn make complex reworking of the component necessary.
  • the present invention is concerned with the problem of specifying an embodiment for a liquid filter of the type mentioned at the outset which acts axially. which enables seals and is relatively inexpensive to manufacture.
  • the invention is based on the general idea, at least a portion of those parts of the filter housing, which are made in one piece in a conventional filter housing with this and must be reworked to perform its' functions to combine in a separately manufacturable function carrying insert, and the axial sealing with respect to the component, to which the filter housing is to be tightly attached by screwing the filter housing to the component.
  • the function carrier insert can also be produced in such a way that reworking can be omitted.
  • the functional insert is made of plastic, in particular by means of an injection molding process.
  • the surface quality that is formed is sufficiently high-quality so that post-processing can be omitted on a regular basis.
  • the filter housing made of metal has sufficient strength to generate sufficient axial bracing, which causes an axial contact force sufficient for the axial seals. Overall, this results in a particularly inexpensive liquid filter. Further important features and advantages of the device according to the invention result from the subclaims, from the drawings and from the associated description of the figures with reference to the drawings.
  • FIG. 1 is a side view of a liquid filter according to the invention in an assembled state
  • FIG. 2 shows a view corresponding to an arrow II in FIG. 1 of the liquid filter according to FIG. 1 without a function carrier insert
  • FIG. 3 is a view as in FIG. 2, but with function carrier insert
  • FIG. 4 shows a rear view of the function carrier insert according to FIG. 3
  • 5 shows a detail section along a section line V in FIG. 3
  • FIG. 6 shows a detail section along a section line VI in FIG. 3,
  • FIG. 7 is a top view of a filter housing of the liquid filter from FIG. 1,
  • Fig. 8 is a bottom view of the filter housing according to FIGS. 7 and
  • FIG. 9 shows a side view as in FIG. 1, but without the filter housing according to FIG. 7.
  • a liquid filter 1 which is designed here as an oil filter for cleaning lubricating oil of an internal combustion engine of a motor vehicle, has a filter housing 2.
  • the filter housing 2 is made of metal, in particular of light metal, for example cast aluminum or die-cast aluminum.
  • a first flange 3 is formed on the filter housing 2, with which the liquid filter 1 can be screwed onto a component, not shown, for example on the engine block of a motor vehicle.
  • the filter housing 2 On its upper side, the filter housing 2 has a second flange 4, with which a filter chamber extension 5 is attached to the filter housing 2. This filter chamber extension 5 is removed from the filter housing 2. turned top closed with a lid 6.
  • the filter chamber extension 5 Arranged in the interior of the filter chamber extension 5 is an annular filter insert, not shown here, which separates a clean side from a raw side in the interior of the liquid filter 1.
  • the filter chamber extension 5 is here made of a plastic, for example as an injection molded component.
  • the cover 6 can be made of a plastic.
  • the filter chamber attachment 5 is fixed to the filter housing 2 in a special way: the second flange 4 - like the filter chamber connection 5 - is essentially cylindrical and has a cylindrical wall 7 projecting axially from the filter housing 2. Axially projecting projections 8 are formed on this wall 7, which have protrusions 9 projecting radially outwards at their axially free ends. In FIG. 1, these elevations 9 protrude from the filter housing 2 at the two central projections 8 towards the viewer of FIG. 1. Gaps 10 are formed between adjacent projections 8.
  • Radially protruding projections 12 are formed on a cylindrical section 11 of the filter chamber extension 5 which interacts with the second flange 4 and each engage in one of the aforementioned gaps 10 between the projections 8 of the filter housing 2.
  • the projections 12 of the filter chamber attachment 5 have, on their side facing the filter housing 2 and according to FIG.
  • an annular clamping element 14 is provided which comprises the second flange 4 in the region of the projections 8 and 12, the elevations 9 of the projections 8 of the filter housing 2 then radially engaging over the clamping element 14 from above, while the elevations 13 of the projections 12 of the Filter chamber approach 5 radially overlap the clamping element 14 from below. This results in an effective fixation and securing for the filter chamber extension 5 on the filter housing 2.
  • an additional elevation 15 is formed on the projections 12 of the filter chamber extension 5, which also protrudes radially outward from the projections 12 and is arranged at the level of the elevations 9 of the projections 8 of the filter housing 2.
  • the clamping element 14 consists e.g. from an open spring steel ring.
  • the filter housing 2 also has a third flange 16 on its underside, via which a heat exchanger 17 or “cooler” is connected to the filter housing 2.
  • this heat exchanger 17 is of the so-called “donut type” and has one that is not visible here central through opening and is screwed to the filter housing 2 via a central fastening screw 18, a cover 19 sealingly closing the central opening of the heat exchanger 17.
  • the filter housing 2 can also be equipped with a first sensor 20, for example a temperature sensor, and with a second sensor 21, for example a pressure sensor, for which purpose corresponding sensor connections are formed on the filter housing 2.
  • a carrier receiving space 22 is formed in the interior of the first flange 3, in which a functional carrier insert 23 can be inserted according to FIG. 3.
  • the first flange 3 is equipped with an axially acting outer seal 24 which surrounds the carrier receiving space 22 and thus the functional carrier insert 23 inserted therein.
  • the function carrier insert 23 has an inlet space 25 which communicates with an inlet for unpurified liquid, which is arranged on the component (not shown) to which the liquid filter 1 is attached.
  • the function carrier insert 23 has an outlet space 26 which communicates with an outlet for cleaned liquid in the aforementioned component.
  • the function carrier insert 23 contains an idle space 27 which communicates with an idle of the component. In the case of a component formed by the engine block of an internal combustion engine, such idling regularly leads to the oil pan, as a result of which the idling is relatively depressurized.
  • the individual rooms 25, 26, 27 are sealed against one another with axially acting inner seals 28.
  • the seals 28 and 24 can be designed as individual elements, however, an embodiment is preferred in which the outer seal 24 and the inner seals 28 are formed by a one-piece sealing body. Due to the screw fastening of the first flange 3 to the component or engine block, the seals 24 and 28 are pressed axially against the component. It is clear that the functionary use
  • the functional insert 23 is adapted for this purpose to the carrier receiving space 22 in such a way that the function carrier insert 23 is supported on the inside on the first flange 3 or on the filter housing 2.
  • the functional insert 23 is made of plastic, e.g. manufactured as an injection molded component.
  • the prestress required to achieve a sufficient sealing effect is achieved via the screw connection on the first flange 3. This can be done easily here, since the filter housing 2 is made of metal.
  • first flange 3 is to accommodate the outer seal
  • a closed circumferential receiving groove 29 is formed, into which the outer seal 24 can be inserted.
  • this receiving groove 29 can be formed in a preferred embodiment in such a way that a circumferential L-shaped, internal step 31 is formed on a wall 30 of the first flange 3 towards the function carrier insert 23.
  • an outer step 33 which is open toward the wall 30 of the first flange 3 and is L-shaped in cross section (mirrored) is formed.
  • the outer step 33 of the function carrier insert 23 and the inner step 31 of the first flange 3 complement each other when the functional carrier insert 23 is inserted in the carrier receiving space 22, complementary to the receiving groove 29 which receives the outer seal 24.
  • This relatively complex embodiment enables an advantageous simplification of the manufacture of the filter housing 2, since fine structures which result only from an arrangement of the groove 29 in the flange 3 and which can only be realized in a relatively complex manner in the context of metal casting production are reduced.
  • the seal 24 is arranged in the groove 29 so that an interface 34 formed between the functional insert 23 and the flange 3 is also sealed.
  • the dimensioning of the wall 32 can preferably be chosen such that the wall 32 protrudes beyond the wall 30 in the axial direction.
  • a groove 35 is also provided for receiving the inner seals 28.
  • This groove 35 or these grooves 35 are each formed at the ends of the partition walls 36 facing the component, which separate the individual spaces 25, 26, 27 in the function carrier insert 23 from one another.
  • these partition walls 36 are designed as double walls according to FIG. 6, each of which has two individual walls 37 running essentially parallel to one another. These individual walls 37 are connected to one another at their free ends by a cross piece 38, in the front of which the component faces the groove 35 Recording the inner seal 28 is formed.
  • a rib 39 projecting from the first flange 3 toward the component is formed, in particular integrally formed, on the first flange 3 or on the filter housing 2, which rib engages in the double wall, that is to say between the individual walls 37, and Cross bar 38 supported on its back facing away from the component.
  • an intensive prestress can be applied to the inner seal 28, and at the same time the appearance of the plastic of the functional carrier insert 23 is reduced.
  • the outlet space 26 of the functional carrier insert 23 has an outlet opening 40, which communicates with the clean side inside the liquid filter 1.
  • a purely drain outlet 42 protrudes into the interior of the filter housing 2, which is formed on the filter chamber extension 5.
  • the drain chamber 26 has a further opening 41, which communicates with an auxiliary channel 43 formed in the filter housing 2, which in turn is connected to the sensor connections of the sensors 20 and 21.
  • the inlet space 25 of the function carrier insert 23 communicates via an inlet opening 44 (see FIG. 3) with an inlet channel 45 formed in the interior of the filter housing 2 (see FIG. 2).
  • the idle space 27 of the radio carrier insert 23 is perforated according to FIG. 3 and has a plurality of openings 46, via which the idle space 27 is connected to an interior space 47 of the filter housing 2 enveloped by the filter housing 2.
  • a pressure control valve 48 is arranged on the rear side of the functional carrier insert 23 facing the interior 47 of the filter housing 2. The position of this pressure control valve 48 is shown in FIG. 2 without the function carrier insert 23 for clarification.
  • This pressure control valve 48 consists essentially of a cylindrical sleeve 49 which contains at least one radial opening 50.
  • a control piston 51 (see FIG. 2) is mounted axially adjustable in the interior of the sleeve 49.
  • This control piston 51 is biased by a spring 52 against a piston seat 53 formed in the interior of the sleeve 49.
  • the spring 52 is supported here on the one hand on the control piston 51 and on the other hand on a support disk 55 which is in the sleeve 49, e.g. is held by trading.
  • the sleeve 49 also has an axial opening 54.
  • the pressure regulating valve 48 is held on the function carrier insert 23, for which purpose it has holding elements 56 on its rear side according to FIG. 4, which at least partially encompass the sleeve on its outside.
  • the end of the sleeve 49 containing the opening 54 is connected via a seal 57 to a corresponding Set 23 trained sealing surface supported.
  • the opposite end of the sleeve 49 is supported in the assembled state inside the filter housing 2 on a corresponding seat 58 on the filter housing 2.
  • the axial opening 54 communicates with the drain chamber 26, while the radial opening 50 controlled by the control piston 51 communicates with the idling chamber 27 and / or with the interior 47 of the filter housing 2. Since the interior 47 and the idle space 27 communicate with one another via the openings 46, the pressure of the idle prevails in these spaces 27, 47, that is to say regularly around atmospheric ambient pressure. In contrast, there is an increased pressure in the discharge space 26, namely approximately the delivery pressure of a pump, not shown here, e.g. an oil pump of a lubricating oil circuit.
  • the pressure control valve 48 is set so that the control piston 51 releases the radial opening 50 from an upper limit pressure (control pressure), so that a corresponding pressure reduction can take place via the idle space 27 or the interior 47.
  • the arrangement of this pressure control valve 48 in the drain chamber 26 has the advantage that the fluid pressure supplied to the component is regulated, which reduces the risk of damage to the component due to an incorrect fluid pressure.
  • a cylindrical connecting piece 59 is formed in the interior of the filter housing 2, which communicates with the cold side of the heat exchanger 17.
  • a seat 60 which is open on one side formed on which a disc designed as a separable component can be supported, which is denoted by 61 in FIG. 9 and has an internal thread which interacts with an external thread of the central screw 18 of the heat exchanger 17. In this way, the heat exchanger 17 can be screwed onto the filter housing 2 without a thread having to be formed on the filter housing 2.
  • the third flange 16 is also essentially cylindrical or circular and is sealed off from the heat exchanger 17 by means of a corresponding, axially acting seal 62, which is shown here only with broken lines.
  • This seal 62 comprises the end of the inlet channel 45 assigned to the third flange 16, which is arranged radially on the outside with respect to a center of the third flange 16.
  • This inlet channel 45 communicates with a correspondingly radially outer inlet, not shown, of the heat exchanger 17, that is to say with its warm side.
  • the end of the connecting piece 59 assigned to the third flange 16 is arranged centrally with respect to the third flange 16 and communicates there with an outlet, also not shown, of the heat exchanger 17, that is to say with its cold side.
  • guide means for example ribs, can be formed on the filter housing 2, which cooperate with the heat exchanger 17 during assembly and center it relative to the third flange 16.
  • guide means for example ribs, can be formed on the filter housing 2, which cooperate with the heat exchanger 17 during assembly and center it relative to the third flange 16.
  • an axially projecting, cylindrical inlet connection 63 is formed on the underside of the filter chamber extension 5 facing away from the cover 6 and cooperates with the connection connection 59 of the filter housing 2 shown in FIG. 7 in the manner of a plug connection.
  • a radially acting seal 64 is attached to the inlet connection 63 and is used to seal this plug connection.
  • Adjacent to the inlet connection 63, the outlet connection 42 is formed on the underside of the filter chamber extension 5 and projects essentially radially from the filter chamber extension 5 (cf. FIG. 2).
  • This drain connector 42 interacts with a connector 65 assigned to the drain chamber 26 and formed on the rear side of the function carrier insert 23 in the manner of a plug connection. It is clear that corresponding, radially acting sealing means are also provided here.
  • the connecting piece 65 of the drain chamber 26 opens into the drain chamber 26 via the drain opening 40 (cf. FIG. 3).
  • connecting piece 66 assigned to the inlet space 25, which is likewise cylindrical and extends parallel to the connecting piece 65 of the outlet chamber 26.
  • This connecting piece 66 interacts in the manner of a plug connection with a connecting piece 67 formed in the interior of the filter housing 2 and which is formed at one end of the inlet channel 45.
  • the connecting piece 66 also carries a radially acting seal 68.
  • a non-return valve 69 is arranged which only flows through the connecting piece.
  • port 66 allows in the connecting piece 67, while a backflow is blocked.
  • the connecting piece 66 opens into the inlet space 25 via the inlet opening 44.
  • auxiliary connection piece 70 On the back of the function carrier insert 23, also assigned to the outlet space 26, an auxiliary connection piece 70 is formed, which runs parallel to the other pieces 65 and 66 and is cylindrical. This auxiliary connection piece 70 also carries a radial seal 71 and interacts in the manner of a plug connection with an auxiliary connection piece 72 which is formed at the end of the auxiliary channel 43. The auxiliary connection piece 70 opens into the outlet space 26 via the opening 41.
  • the fluid flow through the liquid filter 1 works as follows:
  • Heated and contaminated liquid penetrates into the inlet chamber 25 from the inlet of the component (FIG. 3). From the inlet chamber 25, the liquid enters the inlet channel 45 via the connecting piece 66 (FIG. 9) (FIG. 2). The liquid then enters the warm side of the heat exchanger 17 from the inlet channel 45 (FIG. 8). In the heat exchanger 17, the contaminated, raw liquid ness. Through the central outlet of the heat exchanger 17, the cooled liquid penetrates through the connection piece 59 (FIG. 8) into the inlet connection 63 (FIG. 9) of the filter chamber attachment 5. In the interior of the filter chamber attachment 5, the contaminated liquid penetrates the filter insert and thus reaches the clean side of the filter housing 1.
  • the now cooled and cleaned liquid passes through the outlet connection 42 (FIG. 9) into the outlet space 26 (FIG. 3) and passes from this to the end of the component.
  • the cooled, cleaned liquid also reaches the auxiliary channel 43 via the discharge space 26, so that, for example, the liquid temperature and the liquid pressure can be detected via the sensors 20 and 21.
  • the structure of the liquid filter 1 according to the invention is selected so that connections that are axially sealed must, a screw connection between metal parts is always possible. In this way, the plastic components are only exposed to loads that can be easily absorbed by these materials.
  • the connection to the filter housing 2 by means of the second flange 4 provided for fastening the filter chamber attachment 5 does not have to absorb high forces, since the interior 47 of the filter housing 2 is depressurized and since only relatively small, axially acting in the area of the plug connection between the inlet connection 63 and the connection connection 59 Forces act on the filter chamber extension 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un filtre pour liquide (1), par exemple un filtre à huile pour épurer de l'huile lubrifiante, notamment pour des moteurs à combustion interne de véhicules automobiles. A l'intérieur du filtre pour liquide (1), une cartouche filtrante annulaire sépare un côté avant épuration d'un côté après épuration. Un boîtier de filtre métallique (2) comporte une première bride (3) permettant de visser, grâce à un raccord fileté, le filtre pour liquide (1) sur un élément présentant un conduit d'alimentation pour le liquide non épuré, un conduit d'évacuation pour le liquide épuré et un conduit de ralenti relativement exempt de pression. La première bride (3) contient un joint extérieur (24) à action axiale entourant les conduits d'alimentation, d'évacuation et de ralenti, ainsi qu'un espace de réception support (22) entouré par le joint extérieur (24). Dans l'espace de réception support (22) est logé un insert support fonctionnel (23) qui présente une chambre d'alimentation (25) ouverte vers le conduit d'alimentation, une chambre d'évacuation (26) ouverte vers le conduit d'évacuation et une chambre de ralenti (27) ouverte vers le conduit de ralenti, les différentes chambres étant rendues étanches entre elles par des joints intérieurs (28) agissant axialement. Le raccord fileté grâce auquel la première bride (3) est vissée sur l'élément agit axialement et comprime axialement les joints à action axiale sur l'élément, l'insert support fonctionnel (23) s'appuyant sur la première bride (3).
EP01911399A 2000-03-15 2001-01-27 Filtre pour liquide, notamment filtre a huile Expired - Lifetime EP1264082B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10012461A DE10012461A1 (de) 2000-03-15 2000-03-15 Flüssigkeitsfilter, insbesondere Ölfilter
DE10012461 2000-03-15
PCT/DE2001/000351 WO2001069050A2 (fr) 2000-03-15 2001-01-27 Filtre pour liquide, notamment filtre a huile

Publications (2)

Publication Number Publication Date
EP1264082A2 true EP1264082A2 (fr) 2002-12-11
EP1264082B1 EP1264082B1 (fr) 2004-01-07

Family

ID=7634722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01911399A Expired - Lifetime EP1264082B1 (fr) 2000-03-15 2001-01-27 Filtre pour liquide, notamment filtre a huile

Country Status (7)

Country Link
US (1) US6833066B2 (fr)
EP (1) EP1264082B1 (fr)
JP (1) JP4800545B2 (fr)
BR (1) BR0109199B1 (fr)
DE (2) DE10012461A1 (fr)
MX (1) MXPA02008660A (fr)
WO (1) WO2001069050A2 (fr)

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Also Published As

Publication number Publication date
EP1264082B1 (fr) 2004-01-07
BR0109199B1 (pt) 2009-12-01
BR0109199A (pt) 2002-12-10
DE10012461A1 (de) 2001-09-20
JP2003527952A (ja) 2003-09-24
MXPA02008660A (es) 2003-02-24
WO2001069050A3 (fr) 2001-12-06
JP4800545B2 (ja) 2011-10-26
DE50101296D1 (de) 2004-02-12
US20030019462A1 (en) 2003-01-30
WO2001069050A2 (fr) 2001-09-20
US6833066B2 (en) 2004-12-21

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