DE102013216840B4 - Filter device with a valve and an actuating device and the use of the filter device to a fuel supply device of a motor vehicle - Google Patents

Abstract

Filter device (10) for filtering a fluid with a filter housing (12) and a filter element (18) which is to be coupled to a fluid-conducting connection (24) on the filter housing (12), wherein the connection (24) by means of a valve (34) at least partially closable, which has a valve opening (32) of the valve (34) closing the valve body (36) which is movable by an adjusting device (38) of the filter element (18) in an open position, in which the adjusting device (38) at least two actuators (56) is designed, of which the valve body (36) is to be moved simultaneously.

Description

State of the art

The invention relates to a filter device for filtering a fluid, in particular a motor vehicle, with a filter housing and a filter element which is to be coupled to a fluid-conducting connection to the filter housing, wherein the connection by means of a valve is at least partially closed, which closes a valve opening of the valve Valve body which is movable by an adjusting device of the filter element in an open position. Furthermore, the invention relates to a use of such a filter device.

Filtering devices, in particular those for filtering particles of liquid fuel or oil in motor vehicles or other machines, are usually designed from a filter housing and a filter element arranged therein. On the filter housing there are fluid lines with which the fluid to be filtered is directed towards the filter element, through the filter element and away from the filter element. The filter element is interchangeably coupled by means of a fluid-conducting connection to the filter housing.

Furthermore, an electric heating device, a water sensor and / or a pressure sensor are often located on such filter devices.

In order that the proper filter element is always inserted and coupled to such a filter device during its operation, it is generally known to provide an electrical signal device for detecting the presence of a prescribed filter element. This signaling device detects whether a filter element is used or coupled and whether it is the proper filter element. Compared to purely mechanical identifiers for the proper filter element (poka-yoke design) electrical signaling devices have the advantage that they are more difficult to copy and offer more possibilities of identification and other diagnosis on the filter element. At the same time the cost of such electrical signaling devices is comparatively large.

From the DE 103 15 052 A1 a fuel supply system with a diesel filter is known.

From the DE 43 31 467 A1 is a fuel filter known.

Disclosure of the invention

According to the invention, a filter device is provided for filtering a fluid, in particular a motor vehicle, having a filter housing and a filter element which is to be coupled to a fluid-conducting connection on the filter housing. In this case, the connection by means of a valve is at least partially closed, which has a valve opening of the valve closing valve body which is movable by an adjusting device of the filter element in an open position. The adjusting device is designed with at least two actuators, of which the valve body is to be moved simultaneously.

According to the invention, a valve of a filter device, which serves as a poka-yoke detection of an associated filter element, can only be actuated if it is moved simultaneously by at least two actuators of the filter element. If the filter element for actuating the valve z. B., however, only an adjusting device is provided, the valve according to the invention is not operated properly. Accordingly, in such a case, the valve with its valve body remains in its closed position. The corresponding fluid-conducting connection on the filter housing is correspondingly not fluid-substantially continuous, but instead has a relatively large flow resistance. This high flow resistance can be detected by a measuring device which determines the back pressure at the fluid-conducting connection and the filter device according to the invention can be correspondingly controlled. With the inventive, at least two actuators corresponding to a proper filter element in a simple manner by not proper filter elements distinctive identifier is created, which, since it acts mechanically, is simple and inexpensive. At the same time the identifier is also very well integrated into the usually electronic control of the associated motor vehicle. Particularly advantageous is provided by the solution according to the invention, a device with which the fluid supply is reliably closed in the absence of a filter element or an improper or improperly mounted filter element and the fluid supply is opened when properly inserted and proper filter element. This solution is created at the same time in a particularly simple manner with only a few moving parts, so that the connection with the valve can be produced in a simple and cost-effective manner and also manages over the life with few, not wearing parts. It is particularly advantageous only a minor modification of the filter device over conventional filter devices necessary. In the same way, the filter element without significant overhead and without greater complexity compared to conventional filter elements can be produced, so that overall a cost-effective and safe production solution for a filter device is created.

The valve body according to the invention is preferably designed as a slide whose sliding movement jams when it is not moved by the at least two actuators. Such a slider can be provided under the conditions prevailing inside a filter device according to the invention conditions particularly simple and at the same time functionally reliable with the function of the invention, for. B. by at least two laterally, ie transversely to the sliding direction of the slider, spaced actuators, which are thus not all arranged centrally on the slide.

The term "slider" is to be understood in the context of this application, a slidable, for example, plate-shaped or disc-shaped planar element. Preferably, such a slide is guided laterally in at least two guide rails, so that it can be displaced along the extension direction of these guide rails in a spatial direction. For example, by a low-trained tolerance of the dimensions of the slide in its two spatial directions transverse to the sliding direction, the slide can on the one hand approximately fluid-tight seal the two sides separated from him against the guide rails, at the same time then a precise driving of the slide is necessary to jamming of the slide in to prevent the guide rails. The precise control of the slide means hereby a sliding force is applied to the slider such that the resultant of the force vector must extend parallel to the extension direction of the guide rails and preferably must extend substantially through the center of gravity of the slider, so that no torque on one of the two sides of the side Center of gravity can act, by which torque the edges of the slider can wedge or jam in the guide rails. The tolerance of the dimensions of the slider can be selected larger or smaller depending on the application.

The at least two actuators according to the invention are preferably arranged on the valve body in the direction of displacement of the slide attacking at different heights. Thus, not only at least two actuators must attack the valve body according to the invention to move it, but this attack must also be done with different degrees of attacking actuators.

The filter element according to the invention is advantageously designed with a holding device such that with the sliding movement for actuating the valve at the same time the filter element can be coupled to the filter housing or disconnected. The valve actuation according to the invention then takes place automatically during the coupling and also decoupling of a proper filter element. It is thus ensured that it is always recognized when there is a proper filter element on the filter device according to the invention. The secure coupling or uncoupling of the filter element can, for. B. by a locking device with a detent on the filter element and a notch on the connection or vice versa.

The valve body is preferably urged by its own weight, in particular in the normal installation position, in its closed position at least partially closing the valve opening. It then requires no separate force on the valve body to keep it in the closed position. Accordingly, the associated filter device can be designed structurally simple and inexpensive.

The fluid-conducting connection according to the invention is advantageously designed with a cylindrical shape and the valve body can be moved in the axial direction of the cylindrical form. At the same time, in particular with insertion of the filter element into the connection of this kind, the valve according to the invention can be advantageously actuated. Particularly preferably, the connection is designed tubular with a tube wall and the valve opening is formed in the tube wall. The valve opening is thus closed or opened by the associated slide by being moved in the axial direction or longitudinal direction of the fluid-conducting connection.

The filter element is advantageously sealed in a fluid-tight manner in such a construction further to an inner circumferential surface of the tube wall. With such a seal, a fluid-tight coupling between the connection and the filter element is created in a particularly cost-effective manner.

As already mentioned above, in the filter device according to the invention, it is further preferable to provide a measuring device for measuring the hydraulic pressure at the fluid-conducting connection and a control device for controlling the operation of the filter device as a function of the measured pressure.

The invention is also specifically directed to a use of such a filter device according to the invention on a fuel supply device of a motor vehicle. In such a motor vehicle, the invention particularly designed mechanical adjusting device for a valve, on which then the resulting dynamic pressure can be measured, particularly advantageous. With such a design, namely, the filter element can be provided with a purely mechanical identifier, but then in a special way a electronically evaluated recognition of a proper filter element supplies.

An exemplary embodiment of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. It shows:

1 a longitudinal section of a portion of a filter device according to the invention with a not yet coupled filter element,

2 the section II-II in 1 .

3 the longitudinal section according to 1 with coupled filter element and

4 a perspective view of an adjusting device of the filter device according to 1 to 3 ,

In the figures, an embodiment of a filter device 10 a fuel supply device of a motor vehicle, not shown further, which represents a total barrel-shaped filter housing 12 with a substantially disc-shaped, circular filter housing cover 14 and a fluid-tight attachable filter housing cup 16 having. In the filter housing cup 16 There is a replaceable, cartridge-shaped filter element 18 , The filter element 18 is in particular with a likewise disk-shaped, circular filter element lid 20 and a hollow cylindrical and zigzag folded filter element membrane attached thereto 22 designed. In all figures, the gravity acts in a normal installation position substantially downwards with respect to the figures.

The filter element cover 20 is connected to a fluid-conducting connection 24 on the filter housing cover 14 coupling on the inside, so that through this connection 24 one of the filter device 10 filtered fluid, in particular liquid fuel, from the interior of the filter housing 12 can be directed to the outside. Just as well it is also conceivable that by the connection 24 unfiltered fluid into the interior of the filter housing 12 is ushered in.

The fluid-conducting connection 24 is with an outer, hollow cylindrical, round cross-section connecting piece 26 of the filter housing cover 14 designed, and with an inner, hollow cylindrical, in cross-section also round connection 28 of the filter housing cover 14 , In this case, the outer connecting piece protrudes 26 of the filter housing to the outside of the filter housing 12 off, while the inner spigot 28 from the filter housing cover 14 in composite filter device 10 inside the filter housing 12 protrudes. This is the inner connecting piece 28 in the center of the filter housing cover 14 whereas the outer spigot 26 is arranged eccentrically, to the extent that a line 30 from the outer connecting piece 26 out vertically through the filter housing cover 14 through to the outside of the inner connection piece 28 leads. The administration 30 ends there at a circular opening in the inner connecting piece 28 , wherein this opening is a valve opening 32 forms in the sense of the invention. The valve opening 32 may also have a shape other than a circular shape, for example, an elliptical, triangular, rectangular, 5-sided, 6-cornered or generally polygonal shape and, for example, a trapezoidal shape.

The valve opening 32 is part of a valve 34 , by means of which the fluid-conducting connection 24 is substantially closable, namely, if no proper filter element 18 on the filter housing cover 14 is coupled. This is in the fluid-conducting connection 24 in its inner connecting piece 28 a cylindrical shell-shaped valve body 36 arranged, by means of which the valve opening 32 can be largely covered fluid-tight.

The cylindrical shell-shaped valve body 36 extends to near the lateral surface of the connecting piece 28 and may act like a slider against the force of its own weight or against a spring (not shown) by means of an actuator 38 in two guide rails 40 in the direction of a longitudinal axis 42 the entire filter device 10 be pushed back and forth. Does not force through the filter element 18 on the valve body 36 , He is in normal installation position with shearing force acting down in the figure in a lower position with respect to the figure, in which he automatically slips by its own weight, possibly supported by the force of a downward force in the figure feather. In the shell surface of the valve body 36 there is a circular valve body opening 44 which is placed there so that they move the valve body 36 in front of the valve opening 32 is pushed and then a fluid-conducting passage through the port 24 allowed, which would otherwise be locked. Also the shape of the valve body opening 44 may be chosen differently and, for example, have an elliptical, triangular, rectangular, 5-sided, 6-cornered or generally polygonal shape and, for example, a trapezoidal shape. The valve body opening is preferred 44 but chosen so large that a projection of the valve opening 32 to the level of the valve body opening 44 is completely in the border of the valve body opening when both openings are aligned.

The adjusting device 38 for moving the valve body 36 is with two balconies, arms or Stellnasen 46 designed on the valve body 36 at its radially inwardly facing side in the direction of the longitudinal axis 42 considered at different heights or distances, namely a first height 48 and a second height 50 are arranged.

With mounted filter element 18 (please refer 3 ) is on the inner spigot 28 inside or on the inner circumferential surface of a likewise hollow cylindrical, in cross-section transverse to the longitudinal axis 42 round connection piece 52 of the filter element cover 20 which also acts as a filter element nozzle 52 can be designated inserted. It is on the outside or outer surface of the connection piece 52 on the filter element lid 20 facing side an annular seal 54 arranged with the filter element nozzle 52 or connecting piece 52 of the filter element 18 against the inner connecting piece 28 is sealed. The seal 54 at the same time acts as a clamping device or non-positive holding device of the filter element 18 on the filter housing cover 14 ,

On the filter element nozzle 52 are located on the filter housing cover 14 facing edge two actuators 56 in the form of a respective recess or depression of this edge. The recesses are in the direction of the longitudinal axis 42 considered such different deep formed that the actuators 56 so as the Stellnasen 46 at different heights, namely a first altitude 48 and a second height 50 are located.

When inserting the filter element nozzle 52 of the filter element 18 in the connecting piece 28 of the filter housing cover 14 grip the differently highly arranged actuators 56 to the matching noses arranged for them 46 and move the valve body 36 along the two guide rails 40 without the valve body 36 while jammed or locked. The valve body 36 shifts accordingly as explained above and gives the valve opening 32 free, which is also in the filter element nozzle 52 an opening 58 which then also coincides with the valve opening 32 is. Accordingly, then fluid to be filtered through the line 30 of the connection 24 stream. The opening 58 the filter element neck is preferably large enough to hold the valve body opening 44 completely covered when the valve body opening 44 and the opening 58 of the filter element nozzle are aligned.

A not properly arranged offset in the longitudinal direction actuators 56 equipped filter element 18 would be on the connecting piece 28 while causing the valve body there 36 when trying to move him z. B. because of a not running through the centroid force vector jammed and can not move. Accordingly, with such a filter element 18 the valve opening 32 not released. This would be in the line 30 Set as a dynamic pressure such a high hydraulic pressure that this from a connected measuring device 60 detected and the filter device 10 would be recognized as inoperative. It is also possible that the filter housing 12 not close at all, because the filter element 18 then to the immovably jammed valve body 36 abuts and too long for the filter housing 12 is. Will not be a filter element at all 18 installed, so is the valve 34 closed and thus no or only an extremely low fluid flow through the filter device is possible.

Generally it is also possible that the valve 34 with the valve body in the filter element nozzle 52 are arranged and that the valve body 36 with his noses 46 then analogous to the above mechanism of the filter housing cover 14 protruding actuators 56 is pressed.

The filter device 10 is preferably designed such that the connection 24 forms at least one inlet for uncleaned fluid into the filter device into it. In this way it is advantageously ensured that when changing the filter element 18 the connection 24 and thus the at least one inlet of the fluid immediately upon removal of the filter element 18 or at the latest after the complete removal of the filter element 18 by closing the valve 34 is closed, preferably closed fluid-tight. The fluid-tight closing can z. B. by sealing elements on the valve 34 or on the valve body 36 be effected. By this closure, preferably the fluid-tight closure, no fluid can flow from the inlet and there are only small or preferably no dripping amounts when changing the filter element 18 at. Is the filter element change a wrong filter element 18 used or the filter element 18 Forgot, ie: the filter housing cup 16 without inserted proper filter element 18 with the filter housing cover 14 closed, so no fluid through the port 24 of the at least one inlet flow into the filter device or only such a small amount that a fault message can be sent to a control unit or a control device by the low fluid pressure or by the control unit a warning lamp can be turned on, for example in the vehicle cockpit, the maintenance engineer or the driver informed about a fault condition in the fuel supply system, in particular in the filter device. In such a case, the control device or the control device can also actively switch off the pump or the pumps which supply the fluid to the filter device 10 into or pump out of it. In this way it is reliably prevented that uncleaned or poorly cleaned fluid enters the downstream of the filter means located components of a fuel supply system and in this way, for. B. damaged diesel injectors a common rail system.

As described above, it can be at the port 24 however, it may also be a clean fluid drain from the filter.

The filter device according to the invention 10 has on the elements shown in the figures further at least one further connection (not shown in the figures), which as a drain for purified fluid from the filter device 10 addition, if the port shown 24 serves as an inlet for uncleaned fluid or as an inlet for uncleaned fluid in the filter device 10 inside, if the connection 24 as a drain for purified fluid from the filter device 10 also serves.

The filter element is preferred 18 flows through the uncleaned fluid in the radial direction, but it is also an axial flow through the filter element 18 conceivable.

The filter device according to the invention 10 For example, for the filtration of fuel in internal combustion engines, such. As gasoline or diesel suitable. As well, it can be used to clean engine oil of an internal combustion engine or hydraulic oil, for example in wind turbines. Finally, it is also conceivable urea solutions for the emission control of internal combustion engines or simply water or air with the filter device 10 to clean.

Claims (10)

Filter device ( 10 ) for filtering a fluid with a filter housing ( 12 ) and a filter element ( 18 ) connected to a fluid-conducting connection ( 24 ) on the filter housing ( 12 ), the connection ( 24 ) by means of a valve ( 34 ) is at least partially closable, the one a valve opening ( 32 ) of the valve ( 34 ) closing valve body ( 36 ), which is controlled by an actuating device ( 38 ) of the filter element ( 18 ) is movable in an open position, in which the adjusting device ( 38 ) with at least two actuators ( 56 ) is designed, of which the valve body ( 36 ) is to move simultaneously. Filter device according to claim 1, wherein the valve body ( 36 ) is designed as a slide whose sliding movement jams when it is not from the at least two actuators ( 56 ) is moved. Filter device according to claim 2, in which the two actuators ( 56 ) on the valve body ( 36 ) in the direction of displacement of the slider at different heights ( 48 . 50 ) are arranged attacking. Filter device according to claim 2 or 3, wherein the filter element ( 18 ) is designed with a holding device such that with the sliding movement for actuating the valve ( 34 ) at the same time the filter element ( 18 ) on the filter housing ( 12 ) can be coupled or disconnected. Filter device according to one of claims 1 to 4, wherein the valve body ( 36 ), in particular in the normal installation position, of its own weight in its the valve opening ( 32 ) is at least partially occlusive closed position. Filter device according to one of claims 1 to 5, in which the connection ( 24 ) designed with a cylindrical shape and the valve body ( 36 ) is movable in the axial direction of the cylindrical shape. Filter device according to one of claims 1 to 6, in which the connection ( 24 ) tubular with a tube wall and the valve opening ( 32 ) is formed in the tube wall. Filter device according to claim 7, in which the filter element ( 18 ) is fluid-tightly sealed on an inner circumferential surface of the pipe wall. Filter device according to one of claims 1 to 8, in which a measuring device ( 60 ) for measuring the hydraulic pressure at the port ( 24 ) and a control device for controlling the operation of the filter device ( 10 ) are provided depending on the measured pressure. Use of a filter device ( 10 ) according to one of claims 1 to 9 to a fuel supply device of a motor vehicle.

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