WO2016008605A1

WO2016008605A1 - Oil filter device and housing cover and housing pot of an oil filter device

Info

Publication number: WO2016008605A1
Application number: PCT/EP2015/058760
Authority: WO
Inventors: Herbert Jainek
Original assignee: Mann+Hummel Gmbh
Priority date: 2014-07-14
Filing date: 2015-04-23
Publication date: 2016-01-21
Also published as: DE102014010388A1

Abstract

The invention relates to an oil filter device (10) of an internal combustion engine, in particular of a motor vehicle, and a housing cover (24) and a housing pot (20) of an oil filter device (10). The oil filter device (10) comprises at least one oil pan (12) and at least one housing pot (20) of an oil filter housing (16), which housing pot is integrally connected to the at least one oil pan (12). The housing pot (20) has an installation opening (22) for installing and removing at least one oil filter element (18). The installation opening (22) is closed with an insertable and removable cup-shaped housing cover (24) by means of a connecting apparatus (26) for connecting the housing cover (24) to the housing pot (20). In a closed position, the housing cover (24) at least contributes to the formation of a drain block (64) with respect to at least one drain opening (52) arranged in the housing pot (20) in such a way that the drain opening is directed into the oil pan (12), which drain block can be removed at least in a maintenance position by means of an opening motion of the housing cover (24). In the closed position and the maintenance position, and with respect to the surroundings, the housing cover (24) at least contributes to the formation of an outflow block (44) with respect to the installation opening (22), which outflow block can be removed by means of a further opening motion of the housing cover (24) into an open position. A stop apparatus (50) for forming a stop in the closed position of the housing cover (24) at least contributes to the formation of the drain block (64).

Description

description

Oil filter device and housing cover and housing pot

an oil filter device

Technical area

The invention relates to an oil filter device of an internal combustion engine, in particular of a motor vehicle, with at least one oil pan and at least one integrally connected to the at least one oil pan housing pot of an Olfiltergehäuses, which has a built-in opening for installation and removal of at least one oil filter element with an insertable and executable trained, cup-shaped housing cover is closed by means of a connecting device for connecting the housing cover to the housing pot, wherein the housing cover in a closed position opposite at least one directed in the housing pot in the oil pan drain opening at least forms a drainage with an opening movement of the housing cover at least in a maintenance position can be canceled, and wherein the housing cover in the closed position and the maintenance position relative to the environment an outlet barrier with respect to the mounting hole little forms with at least forms, which can be canceled over a further opening movement of the housing cover in an open position.

Furthermore, the invention relates to a housing cover of an oil filter housing an oil filter device of an internal combustion engine, in particular a motor vehicle, which is cup-shaped, which is designed to close an installation opening of an integrally connected to at least one oil pan of the oil filter device housing pot of Olfiltergehäuses for installation and removal of at least one Olfilterelements insertable and executable comprising at least one cover-side connecting element of a connecting device for connecting the housing cover to the housing pot, the at least one cover-side drain blocking element of a drainage barrier against at least one drain opening, which is arranged directed in the housing pot in the oil pan, and the at least one cover-side leakage barrier element of a Has outlet lock against the mounting hole.

Moreover, the invention relates to a housing pot of an oil filter housing an oil filter device of an internal combustion engine, in particular a motor vehicle, which is integrally connected to at least one oil pan of the oil filter device having a mounting hole for installation and removal of at least one Olfilterelements having an insertable and executable formed housing cover the Olfiltergehäuse can be closed, the at least one pot-side connecting element of a connecting device for connecting the housing cover having the housing pot, which has at least one discharge opening, which is arranged directed in the oil pan, the at least one pot-side drain blocking element of a drainage barrier against the at least one drain opening and the at least one pot-side outlet blocking element of an outlet barrier with respect to the mounting hole has up.

State of the art

From EP 1 094 203 B1 an oil filter device for internal combustion engines is known. The oil filter device comprises an oil filter housing integrally connected to an oil pan of the internal combustion engine with a geodetic lower opening for installation and removal of a filter cartridge. The opening is associated with an insertable into the oil filter housing with the interposition of ring seals for opening and closing formed, cup-shaped closure lid. In order to avoid a derivation of the oil contained in the oil filter housing through the free environment in a separate receptacle when changing the oil filter insert, it is provided that the closure lid in the closed position by means of a free pot portion and a ring seal facing a downstream in the oil filter housing in the oil pan arranged drain opening forms a drainage barrier. The drain lock can be canceled via an opening rotary movement of the closure lid. A further closure lid side provided ring seal forms between a free, opening-side end portion of the oil filter housing and an adjacent pot portion of the closure cap an outlet barrier.

The invention has for its object to design an oil filter device, a housing cover and a housing pot of the type mentioned, in which the drainage barrier and / or the outlet lock as simple as possible, in particular with as few and / or simple components, and / or as reliable as possible, especially robust, designed. In particular, the housing cover and / or the housing pot should be as simple as possible, in particular manufactured, can be.

Disclosure of the invention

This object is achieved in that the drainage lock is at least co-formed by a stop device for forming a stop in the closed position of the housing cover.

According to the invention, the drainage barrier is formed with the stop device at least. The stop device serves to form a stop in the closed position of the housing cover in the housing pot. With the stop device, the closed position of the housing cover can be defined. By means of the at least one stop device, the Connecting device, in particular a screw, in the closed position of the housing cover mechanically stretched, in particular biased, are. Thus, the risk can be reduced that the housing cover dissolves undesirable and can be lost. In the invention, two functions, namely the function of the expiry lock and the function of the stop are combined. Thus, the number of functional components can be reduced accordingly. In addition, the stop and the drain lock can be activated automatically in particular by moving the housing cover in the closed position and automatically released by moving out of the closed position out. Thus, an assembly effort, in particular on the assembly or maintenance can be reduced.

Advantageously, viewed from the installation opening, the stop device can be arranged as deeply as possible in the housing pot. Thus, corresponding stop elements of the stop device, in particular at least one cover-side stop element, can be arranged correspondingly deep in the housing pot. In this way, the at least one drain opening to the oil pan can be arranged correspondingly deep in the housing pot. The at least one drain opening can be realized more easily. In particular, in an oil pan with integrated housing pot produced by a molding or casting process, the at least one drain opening can be removed from the mold more easily. Furthermore, the stop device can thus be better protected inside the housing pot.

Advantageously, the drainage barrier can be arranged on a pressure side of the oil filter device. On the pressure side of the Olfiltervorrichtung prevails an operating pressure of the oil. The drain barrier may face an inlet of the oil filter housing. By means of the at least one stable and robust stop device, a largely tight sealing point can be realized in the closed position of the housing cover. With this sealing point, the main pressure during operation of the Olfiltervorrichtung can be reliably intercepted. The drainage barrier in the form of the stop device can advantageously seal against the pressure side. The outlet lock can advantageously have at least one cover-side outlet blocking element and at least one pot-side outlet blocking element, which can cooperate sealingly in the closed position and the maintenance position.

The leakage barrier can advantageously be arranged on a pressure-reduced, in particular pressure-free side, in particular towards the environment. The leakage barrier can seal against the pressure-reduced side. The discharge barrier arranged on the pressure side can advantageously protect the leakage barrier against the operating pressure on the pressure side. The discontinued Lock can be realized in this way easier, especially with lower pressure resistance requirements.

Advantageously, the connection direction can have a rotary / plug connection, in particular a screw connection or a bayonet-type connection, at least. The housing cover can be connected by means of a rotary / plug movement about a connecting axis with the housing pot and separated from it. The connecting device can have an internal thread on the side of the housing pot, which can correspond with a corresponding external thread on the side of the housing cover. The housing cover can be screwed by means of the screw in the housing head.

During an oil change and / or oil filter replacement, the housing cover can first be brought from the closed position to the maintenance position. In the maintenance position the expiry lock is automatically canceled. The oil can flow through the at least one drain opening from the housing pot in the oil pan. Because of the use of at least one drain opening can be dispensed with a further drain opening in particular in the bottom of the housing cover. The oil from the oil sump can be drained off centrally through a corresponding discharge opening, which can be closed in particular by means of a removable closure means, in particular a drain screw. Alternatively, the oil can be sucked out of the oil pan by means of a corresponding suction. In the maintenance position, the leakage stop is activated so that no oil can escape from the housing pot into the environment. After draining the oil from the housing pot into the at least one oil sump, the housing cover can be further moved out of the maintenance position and finally completely out of the housing pot. The oil filter element can be replaced by the open mounting hole. The removal of the oil from the oil pan can advantageously take place before or after the actuation, in particular opening, of the housing cover.

The oil filter device can usually be operated in a normal operating orientation. The normal operating orientation may also correspond to the orientation of the oil filter device in which it can be maintained. Advantageously, in the normal operating orientation, the oil sump can be located at a spatially lower location of a motor oil circuit of the internal combustion engine. Advantageously, the at least one discharge opening for discharging the engine oil may be located at a spatially lower, in particular the lowest, location of the oil pan. Advantageously, the installation opening can be spatially located below in a normal operating orientation of the oil filter device. A housing axis of the oil filter housing may advantageously extend vertically in the normal operating orientation. Alternatively, the installation opening can also be arranged laterally. The housing axis can advantageously also run obliquely to the vertical or horizontal.

Advantageously, the housing axis can run parallel or coaxial to an installation axis of the at least one Olfilterelements in the housing pot. Advantageously, the housing axis parallel or coaxial to a direction of installation and removal direction of the housing cover extend into the housing pot. Advantageously, the housing axis parallel or coaxial to the connecting axis, in particular a rotary / thru axle, the connecting means of the housing cover with the housing pot run.

In an oblique or horizontal arrangement of the housing axis, in particular in the case of a lateral arrangement of the installation opening, the at least one discharge opening can advantageously lead out of the housing housing at the bottom. In this way, the oil can flow out of the housing pot through the drain opening better in the oil pan with suspended drain lock. Advantageously, in the closed position of the housing cover, the outlet barrier can be arranged on the side of the at least one drain opening which is axially opposite the drainage axis with respect to the housing axis. In the case of a vertically arranged housing axis, in the normal operating orientation of the oil filter device, the drainage barrier can be arranged above the at least one drainage opening. After cancellation of the drain lock so the engine oil can pass through the drain lock down to the at least one drain opening. The leakage barrier may be arranged spatially below the at least one drain opening.

Advantageously, the leakage barrier can be arranged in the vicinity of the installation opening. In this way, it can be arranged as far down as possible in the normal operating orientation in the case of a vertical housing axis. Thus, the amount of remaining in the housing pot and / or the housing cover residual oil can be reduced. In addition, the size of the housing cover can be reduced. A correspondingly large extent, in particular of the peripheral wall of the housing cover, can be realized in the axial direction with respect to the housing axis. Furthermore, a correspondingly axially extended receptacle for the housing cover can be provided in the housing pot. The filter element can advantageously be a hollow filter element, in particular a round filter element with a round cross section, an oval round filter element with an oval cross section, a flat oval round filter element with a flattened oval cross section, a conical round filter element, in which the round cross section in the axial Direction tapered to the main axis, a conical-oval round filter element in which the oval cross-section tapers in the axial direction at least in the direction of a transverse axis, a conical flat-oval round filter element in which the flat-oval cross-section tapers in the axial direction at least in the direction of a transverse axis, or a hollow filter element with a different, in particular an angular, cross-section and / or a different type of axial cross-sectional course in the direction of the main axis.

The filter medium may advantageously be circumferentially closed or open with respect to the element axis. The filter medium may in particular be star-shaped, preferably zigzag-shaped or wavy, folded or bent. The filter medium may also be unfolded or unbent.

The filter medium can be filter paper, filter fleece or another type of filter medium suitable for filtering oil. The filter medium can be single-layered or multi-layered. It may also be provided a filter bellows of a foam-like filter medium.

The oil filter device may advantageously be part of an engine oil circuit of an internal combustion engine. It can be used to clean and collect engine oil. However, the invention is not limited to an oil filter device of an engine oil circuit of an internal combustion engine of a motor vehicle. Rather, it can also be used in other types of oil systems of motor vehicles, in particular hydraulic oil, transmission oil or the like. The oil filter device can also be used outside the automotive industry, especially in industrial engines.

In an advantageous embodiment, the stop device can have at least one pot-side stop element on the side of the housing pot, in particular at least one pot-side stop surface, which has at least a partial axis of movement relative to a housing axis, at least one corresponding cover-side stop element in the closed position, in particular at least one end face, at least partially extending cover-side stop surface, the housing cover sealingly abut.

The at least one cover-side stop element and the at least one pot-side stop element of the stop device can additionally be used as drainage blocking elements of the drainage device. lock effect. Stop elements can be made robust, so that overall the drainage barrier can be robust accordingly.

The at least one cover-side abutment surface and / or the at least one pot-side abutment surface can advantageously extend radially and circumferentially with respect to the housing axis and / or optionally the rotational / thru-axis of the connecting device. In this way, the abutment surfaces can be easily brought together flat when assembling the housing cover and the housing pot. The stop surfaces can be in the closed position of the housing cover close to each other and so activate the expiry lock.

In a further advantageous embodiment, at least in the maintenance position, a region between the radially outer peripheral side of the housing cover relative to a housing axis and the corresponding radially inner peripheral side of the housing pot at least between a free end edge of the peripheral wall of the housing cover and a pot-side drain blocking element of the drainage barrier for oil be permeable. In this way, once the drain lock is released, the oil from the housing pot from the front edge of the housing cover pass through the oil-permeable area to the drain opening. For this purpose, advantageously the radially outer circumferential side of the peripheral wall of the housing cover and / or the radially inner peripheral side of the peripheral wall of the housing pot can be flattened in the oil-permeable region and / or provided with oil passages.

Advantageously, the connection means may be permeable to oil. When using a screw connection, the internal thread and / or the external thread can advantageously be flattened in order to realize the oil-permeable region.

In a further advantageous embodiment, at least one cover-side connecting element of the connecting device can be arranged axially between the end-side edge and a cover-side drain blocking element on the radially outer circumferential side of the housing cover with respect to a housing axis. In this way, the cover-side connecting element can be arranged protected in the housing interior of the housing pot. In addition, the connection device can thus be wetted with oil from the housing interior, in particular lubricated. This can have a positive effect on the maintenance of the functionality of the connection device. In a further advantageous embodiment, at least one pot-side connecting element of the connecting device can be arranged at the radially inwardly with respect to a housing axis peripheral side of the housing pot from the mounting hole from behind a pot-side drain blocking element of the drain. In this way, the pot-side connecting element can be arranged protected in the housing interior of the housing pot. In addition, the connection device can thus be wetted with oil from the housing interior, in particular lubricated. This can have a positive effect on maintaining the functionality of the connection device. In a further advantageous embodiment, the outlet barrier and / or the drainage barrier can have at least one sealing device, in particular with at least one annular seal. By means of the at least one sealing device, the leakage barrier can be better sealed towards the environment and / or to the drainage barrier. Alternatively or additionally, the drainage barrier can be better sealed off towards the interior of the housing and / or toward the outlet barrier.

Advantageously, the at least one sealing device can be arranged on the pressure-free side of the oil filter housing, in particular on the side facing the environment. In this way, the pressure load on the at least one sealing device can be reduced. The requirement for tightness and / or compressive strength for the at least one sealing device can thus be reduced.

By implementing the drainage barrier by means of the at least one stop device, the main pressure during operation of the internal combustion engine can already be compensated there. The pressure load of the leakage barrier and the local sealing device can be reduced. By combination with the stop device can be achieved with only one sealing device, which may be located advantageously on the side of the outlet lock, sufficient tightness to the environment. In the Ölfiltervor- direction known from the prior art, two O-ring seals are required because there is the stop device on the outside of the housing pot.

Advantageously, the at least one sealing device may comprise at least one annular seal, in particular O-ring seal. In a further advantageous embodiment, the leakage barrier can be activated, starting from the closed position of the housing cover, via a greater axial reach relative to a housing axis than the drainage barrier. In this way, during gradual because of the housing cover from its closed position to the maintenance position, the expiry lock first be repealed. In the maintenance position, due to the larger axial range, the stop lock can remain activated. By further moving the housing cover out of the closed position, finally, the outlet lock can be canceled. Advantageously, the leakage stop can only be canceled by completely removing the housing cover from the housing pot.

In a further advantageous embodiment, the peripheral wall of the housing cover may comprise at least one oil passage which can communicate with the drain opening of the housing pot at least in the maintenance position. Due to the at least one oil passage, oil can flow out of the interior of the housing cover in the maintenance position. Thus, in the maintenance position, the oil level in the housing cover can be reduced. In this way it can be prevented that the housing cover is still full of oil when it is completely removed from the housing pot. Thus, the risk can be reduced that still contained in the housing cover residual oil spills when removing the housing cover into the environment.

Advantageously, at least one drain opening with respect to the housing axis can be located axially between at least one cover-side drain blocking element of the drainage barrier and the frontal free edge of the peripheral wall of the housing cover.

Advantageously, at least one drain opening can be located between at least one cover-side drainage blocking element and at least one cover-side connecting element of the connecting device.

In the closed position of the housing cover, the drainage barrier can block the at least one oil passage against the at least one drainage opening. Thus, in the closed position, no oil can pass from the housing cover through the at least one oil passage into the oil sump.

The technical problem is further solved by the housing cover according to the invention that the at least one cover-side drain blocking element is formed by at least one cover-side stop element of an anchor device to form a stop in the closed position of the housing cover at least.

The advantages and features shown in connection with the oil filter device according to the invention and its advantageous embodiments apply correspondingly to the housing cover according to the invention and vice versa. The technical problem is further solved by the housing pot according to the invention that the at least one pot-side drain blocking element of at least one pot-side stop element of an anchor device to form a stop in the closed position of the housing cover is at least mitgebildet.

The advantages and features shown in connection with the oil filter device according to the invention and the housing cover according to the invention and their respective advantageous embodiments apply correspondingly to the housing pot according to the invention and vice versa. Brief description of the drawings

Further advantages, features and details of the invention will become apparent from the following description in which an embodiment of the invention is explained in detail with reference to the drawing. The person skilled in the art will expediently also individually consider the features disclosed in combination in the drawing, the description and the claims in combination and make them into meaningful further combinations. It show schematically

1 shows a longitudinal section of part of an operable Olfiltervorrichtung with a

Oil pan and an integrated oil filter, wherein a housing cover of an oil filter housing is shown in its closed position;

Figure 2 shows the Olfiltervorrichtung of Figure 1, in which case the housing cover in a

Maintenance position is shown partially open.

In the figures, the same components are provided with the same reference numerals. Embodiment (s) of the invention

FIG. 1 shows a section of an oil filter device 10 of an oil filter circuit of an internal combustion engine of a motor vehicle in a ready-to-use state in a longitudinal section. FIG. 2 shows the oil filter device 10 in a maintenance state during a filter change. The oil filter device 10 comprises an oil pan 12, which is shown only partially in FIGS. 1 and 2. In the normal operating orientation of the oil filter device 10, the oil pan 12 is arranged spatially at the bottom of the internal combustion engine. It serves to catch the engine oil of the engine oil circuit. The oil filter device 10 further comprises an oil filter 14, with which the engine oil of the engine oil circuit can be cleaned in a manner not further interest here. The oil filter 14 includes an oil filter housing 16. The oil filter housing 16 has one in Figures 1 and 2 Not shown inlet for motor oil to be filtered and a likewise not shown outlet for filtered engine oil. In the oil filter housing 16, an oil filter element 18 is interchangeably arranged to separate the inlet from the outlet. The oil filter housing 16 has a housing pot 20, in Figures 1 and 2 above. The housing pot 20 is integrally connected integrally with the oil pan 12. The housing pot 20 has an installation opening 22 for installation and removal of the oil filter element 18. The installation opening 22 is in the embodiment shown in the normal operating orientation spatially down. The installation opening 22 is closed in the ready-for-operation state, as shown in FIG. 1, with a cup-shaped housing cover 24. The housing cover 24 is for this purpose in the mounting hole 22 can be inserted. To open the mounting hole 22 of the housing cover 24 is executable from this. The housing cover 24 is connected to the housing pot 20 by means of a screw connection 26. A peripheral wall 28 of the housing cover 24 protrudes through the mounting opening 22 in the housing pot 20. Within the housing cover 24 is a major part of the oil filter element 18th

A radially inner peripheral side 30 of the housing pot 20, the peripheral wall 28 of the housing cover 24 and an element axis of the oil filter element 18 are coaxial with a housing axis 32 of the oil filter 14. If "radial", "axial", "coaxial", " unless otherwise stated, this refers to the housing axis 32. The oil filter element 18 is a so-called round filter element. The oil filter element 18 comprises a zigzag-folded, circumferentially closed filter medium 34. The filter medium 34 is a filter paper or filter fleece suitable for filtering motor oil. In a surrounded by the filter medium 34 element interior 36 a coaxial support tube is arranged, the peripheral wall is permeable to engine oil. Also located in the element interior 36 is a bypass valve 38 of no interest here.

The filter medium 34 is flowed through during operation of the internal combustion engine for cleaning the engine oil from radially outside to radially inside. The purified engine oil passes from the element interior 36 in the associated outlet and leaves through this the oil filter 14th The oil filter element 18 is surrounded radially on the outside by a crude oil-side inlet ring space 40. The inlet annulus 40 is located mostly within the housing cover 24. In the inlet annulus 40, an operating oil pressure prevails during operation of the internal combustion engine. Axially above the installation opening 22, the radially inner peripheral side 30 of the housing pot 20 is designed as a sealing surface 42 of an outlet barrier 44. The outlet lock 44 seals in the closed position of the housing cover 24, as shown in Figure 1, and in the maintenance position of the housing cover 24, as shown in Figure 2, a housing interior 46 of the oil filter housing 16 to the environment from.

At the installation opening 22 axially opposite end of the sealing surface 42, the radially inner peripheral side 30 has a step radially inward. The step forms a pot-side abutment surface 48 of a stop device 50. The stop device 50 implements a stop for the housing cover 24 in the closed position of the housing cover 24.

On the side facing the oil pan 12, a drain opening 52 for engine oil passes through the peripheral wall of the housing pot. The drain opening 52 is located axially between the sealing surface 42 and the pot-side stop surface 48. The drain opening 52 is directed in the housing pot 20 in the oil pan 12. In the maintenance position of the housing cover 24 and the open position (not shown), ie with the housing cover 24 removed, the drain opening 52 connects the housing interior 46 to an oil pan interior 54 of the oil sump 12.

On the installation opening 22 axially opposite side of the pot-side stop surface 48, the radially inner peripheral side 30 of the housing pot 20 has a coaxial internal thread 56 of the screw 26.

The radially outer peripheral side 58 of the peripheral wall 28 of the housing cover 24 has axially next to its free end edge an external thread 60 of the screw 26, which corresponds to the internal thread 56 of the housing pot 20.

The external thread 60 is flattened in places here not of interest. The screw 26 is permeable there for engine oil.

On the free end edge axially opposite side of the external thread 60, the peripheral wall 28 of the housing cover 24 has a step radially outward. The step forms a cover-side abutment surface 62 of the stop device 50. The cover-side stop surface 62 and the pot-side stop surface 40 each extend circumferentially and in the radial direction. In the closed position of the housing cover 24, the cover-side stop surface 62 lies flat against the cup-side stop surface 48 and forms with this a drain barrier 64 for the drain opening 52nd

Axially between the external thread 60 and the cover-side stop surface 62, two continuous oil passages 66 in the peripheral wall 28 of the housing cover 24 are arranged. The oil passages 66 lead from an inner space of the housing cover 24, respectively the inlet annular space 40, to a region surrounding the housing cover 24 radially on the outside. In FIGS. 1 and 2, one of the oil passages 66 is shown in each case.

On the external thread 60 axially opposite side of the cover-side stop surface 62 are viewed in the radially outer peripheral side 58 of the housing cover 24 in the axial direction side by side two coaxial inner annular channels 68, a sealing groove 70 with an O-ring seal 72 and a coaxial outer annular channel 74.

In the closed position and the maintenance position of the housing cover 24, the O-ring seal 72 is tight against the sealing surface 42 of the housing pot 20 at. The O-ring seal 72 is part of the leakage barrier 44.

In the closed position, the stop device 50 biases the screw connection 26 in the axial direction and thus prevents the housing cover 24 from being able to unscrew itself from the housing pot 20. In the closed position both the drain lock 64 and the outlet lock 44 is activated. The drain lock 64 prevents oil from the housing interior 46 can pass through the drain opening 52 in the oil pan 12. The leakage barrier 44 prevents oil from entering the housing interior 46 into the environment.

To replace the oil filter element 18, an oil drain screw (not shown in FIGS. 1 and 2) is removed from an oil drain opening 76 of the oil pan 12, as indicated in FIG. The Olablassöffnung 76 is located at a spatially lower in the normal operating orientation of the oil pan 12. The engine oil from the oil pan 12 can drain from the Olablassöffnung 76 down and are collected in a collection container, not shown. Alternatively, the Olablassöffnung 76 can be opened at a later date of maintenance.

The housing cover 24 is screwed a piece out of the housing pot 20 out into the maintenance position. The cover-side abutment surface 62 separates from the pot-side attachment. impact surface 48, so that the drain lock 64 is released. In the service position, the drain barrier 64 also releases the oil passages 66. When unscrewing the housing cover 24, the O-ring seal 72 of the outlet lock 44 continues to slide sealingly towards the surroundings in the axial direction along the sealing surface 42 of the housing pot 20.

The axial range over which the outlet lock 44 is active starting from the closed position of the housing cover 24 is greater than the axial range in which the drain barrier 64 is active. The extension of the sealing surface 42 in the axial direction is so great that in the maintenance position the outlet lock 44 is active. In this way, no engine oil can get into the environment in the maintenance position.

Between the cover-side stop surface 62 and the pot-side stop surface 48, an annular drain channel 78 is realized in the maintenance position, which is connected to the drain opening 52. The flattened external thread 60 improves the oil permeability of the screw 26. In addition, the oil flows from the interior of the housing cover 24 through the oil passages 66 also in the annular drain channel 78th From the annular drain passage 78, the oil passes through the drain opening 52 in the oil pan 12. The housing cover 24 can now be completely unscrewed from the housing pot 20. The oil level in the housing cover 24 is located below the oil passages 66, ie well below the frontal free edge of the housing cover 24. Thus, it can be avoided that engine oil from the housing cover 24 can slosh into the environment.

Claims

claims

Oil filter device (10) of an internal combustion engine, in particular of a motor vehicle, with at least one oil pan (12) and at least one with the at least one oil pan (12) integrally connected housing pot (20) of an oil filter housing (16) having a mounting opening (22) for installation and Removal of at least one oil filter element (18) which is closed with an insertable and executable, cup-shaped housing cover (24) by means of a connecting device (26) for connecting the housing cover (24) with the housing pot (20), wherein the housing cover (24) in a closed position opposite at least one in the housing pot (20) directed into the sump (12) arranged discharge opening (52) at least with a drain lock (64) which can be canceled by an opening movement of the housing cover (24) at least in a maintenance position, and wherein the housing cover (24) in the closed position and the maintenance position relative to the Umg Forming an outlet barrier (44) opposite the mounting opening (22) at least forms, which can be canceled over a further opening movement of the housing cover (24) in an open position, characterized in that the drainage barrier (64) by a stop means (50) for forming a Stop in the closed position of the housing cover (24) is at least mitgebildet.

Oil filter device according to claim 1, characterized in that the stop means (50) on the side of the housing pot (20) at least one pot-side stop element, in particular at least one with respect to a housing axis (32) frontally, at least partially extending pot-side stop surface (48), on which in the closed position, at least one corresponding cover-side stop element, in particular at least one end-side, at least partially extending cover-side stop surface (62) of the housing cover (24) sealingly rests.

Oil filter device according to one of the preceding claims, characterized in that at least in the maintenance position, a region between the relative to a housing axis (32) radially outer peripheral side (58) of the housing cover (24) and the corresponding radially inner peripheral side (30) of the housing pot (20). at least between a free end edge of the peripheral wall (28) of the housing cover (24) and a pot-side drain blocking element (48) of the drain barrier (64) is permeable to oil.

Oil filter device according to one of the preceding claims, characterized in that on the relative to a housing axis (32) radially outer peripheral side (58) of the peripheral wall (28) of the housing cover (24) axially between the front edge and a cover-side drain locking element (62) at least one lid-side Connecting element (60) of the connecting device (26) is arranged.

5. Oil filter device according to one of the preceding claims, characterized in that at the relative to a housing axis (32) radially inner peripheral side (30) of the housing pot (20) of the mounting hole (22) axially behind a pot-side drain locking element (48) of the drain lock ( 64) at least one pot-side connecting element (56) of the connecting device (26) is arranged.

6. Oil filter device according to one of the preceding claims, characterized in that the outlet barrier (44) and / or the drain barrier (64) at least one sealing device, in particular with at least one annular seal (72).

7. Oil filter device according to one of the preceding claims, characterized in that the outlet lock (44) starting from the closed position of the housing cover (24) via a relative to a housing axis (32) larger axial range is activated as the drain barrier (64).

8. Oil filter device according to one of the preceding claims, characterized in that the peripheral wall (28) of the housing cover (24) has at least one oil passage (66) which communicates at least in the maintenance position with the drain opening (52) of the housing pot (20).

9. housing cover (24) of an Olfiltergehäuses (16) of an oil filter device (10) of an internal combustion engine, in particular a motor vehicle, the cup-shaped, for closing an installation opening (22) one with at least one oil pan (12) of the oil filter device (10) integrally connected Housing pot (20) of the Olfiltergehäuse (16) for installing and removing at least one oil filter element (18) is insertable and executable formed, the at least one cover-side connecting element (60) of a connecting device (26) for connecting the housing cover (24) with the housing pot (20 ), which has at least one cover-side drain blocking element (62) of a drainage barrier (64) opposite at least one drainage opening (52) which is arranged in the housing pot (20) directed into the oil sump (12) and which has at least one outlet-side outlet blocking element (72 ) has an outlet barrier (44) opposite the installation opening (22), characterized in that the at least one cover-side drainage blocking element (62) of at least one cover-side stop element (62) of a stop device (50) is at least co-formed to form a stop in the closed position of the housing cover (24).

10. Housing pot (20) of an oil filter housing (16) of an oil filter device (10) of an internal combustion engine, in particular a motor vehicle, which is integrally connected to at least one oil pan (12) of the oil filter device (10) having a mounting opening (22) for installation and removal at least one oil filter element (18) which can be closed with an insertable and executable housing cover (24) of the oil filter housing (16), which has at least one pot-side connecting element (60) of a connection insert. direction (26) for connecting the housing cover (24) with the housing pot (20) having at least one drain opening (52) which is arranged directed in the oil sump (12), the at least one pot-side drain blocking element (48) of a drain barrier ( 64) with respect to the at least one drain opening (52) and the at least one pot-side outlet blocking element (42) has an outlet barrier (44) opposite the installation opening (22), characterized in that the at least one pot-side drainage blocking element of at least one pot-side stop element (42) Stop means (50) for forming a stop in the closed position of the housing cover (24) is at least co-formed.

Oil filter element (18), receivable in an oil filter device (10) of an internal combustion engine according to one of claims 1 to 8, characterized in that the oil filter element (18) through an open mounting hole (22) is exchangeable, wherein the oil filter element (18) formed as a hollow filter element is, wherein the purified oil passes from an element interior (36) in the associated outlet and through this leaves the oil filter (14), wherein the oil filter element (18) radially from the outside of a crude oil side inlet annulus (40) is umvorbar.