EP1664659B1 - Oil module for an internal combustion engine - Google Patents

Abstract

An oil module for an internal combustion engine, comprising a carrier element that can be flanged onto an engine block of the internal combustion engine and carries at least one oil filter and an oil cooler. The oil module is provided with channels for guiding oil and water, one of the channels being an oil cooler bypass channel connecting an oil inlet of the oil cooler to an oil outlet of the oil cooler. At least a main part of the oil cooler bypass channel extends through an oil cooler base plate occluding the oil cooler on the carrier element side, or through an intermediate plate arranged between the oil cooler and the carrier element in a sealing manner.

Description

The present invention relates to an oil module for an internal combustion engine, with a support member flangeable to an engine block of the internal combustion engine, which carries at least one oil filter and an oil cooler, wherein in the oil module channels for the guidance of oil and water are provided, of which one channel is an oil cooler bypass passage is that connects an oil inlet of the oil cooler with an oil outlet of the oil cooler.

An oil module of the type mentioned is out EP 0 816 645 B1 known. In this known oil module is provided that in the support part a running exclusively within the support part bypass channel for a throttled bypass to the oil passage is integrated by the oil cooler. This bypass ensures that when cold and therefore viscous oil, a relatively large part of the oil flows bypassing the oil cooler to the lubrication points of the engine to ensure adequate lubrication even with still cold lubricating oil. As the temperature of the lubricating oil increases, an increasing proportion of the oil flows through the oil cooler, thereby reducing the temperature of the oil to prevent thermal damage to the engine oil due to excessive oil temperatures.

In particular, in the automotive industry, it is a general desire to be able to produce different versions of an internal combustion engine modular .. It should be as many identical components for different versions of the internal combustion engine use. The internal combustion engines then differentiate z. B. in that one embodiment has a turbocharger and another embodiment has no turbocharger. The internal combustion engines usually differ in their different versions in their performance, with the result that different requirements are placed on the oil module and the oil cooler provided therein depending on the design of the internal combustion engine. These different requirements can, for example, be met in that, depending on the design of the internal combustion engine with which the oil module is connected, the bypass is designed differently, in particular with different flow cross-section. If in the carrier part according to the above-cited prior art, the passage cross section of the bypass channel to be changed, it is necessary either ver-change the injection mold for the support member produced as a diecast or subsequently make a mechanical processing on each support member produced. Both approaches are technically complex and lead to high costs, which have a negative impact on profitability.

The document DE 19654365 describes an oil cooler for an internal combustion engine with an attachable to an engine block of the internal combustion engine support member and with an oil cooler bypass passage extending through a between the oil cooler and the support member sealingly arranged intermediate plate.

For the present invention, therefore, the object is to provide an oil module of the type mentioned, which avoids the disadvantages and in which an adaptation to different requirements, in particular a change in the passage cross section of the bypass channel, with less effort and thereby at lower cost possible is.

The solution of this object is achieved according to the invention with an oil module of the type mentioned, which is characterized in that the.Oil cooler bypass passage over at least the greater part of its length by a oil cooler trägerteilseiting final oil cooler base plate or by a between the oil cooler and the support member sealingly arranged intermediate plate ,

Essential to the invention in the oil module according to the application of the oil cooler bypass passage over the at least greater part of its length in the oil cooler base plate or in an intermediate plate, but not in the carrier part produced as a die-cast part. Both the oil cooler base plate and the intermediate plate are compared to a die casting very simple components that can be produced inexpensively and where minor changes in shape also with little effort and thus can be made inexpensively. Thus, the same carrier part can always be used for different versions of the associated internal combustion engine; Any necessary adjustment then takes place by simply changing or selecting the appropriate oil cooler base plate or intermediate plate. Elaborate and expensive changes to the injection mold for the 'carrier part are thus completely avoided. When using the intermediate plate and the oil cooler can remain unchanged, which saves the production of different oil cooler designs. Only different intermediate plates must then be manufactured and installed depending on the design of the associated internal combustion engine.

In a further embodiment of the invention it is provided that the oil cooler bypass passage in the oil cooler base plate or in the intermediate plate by at least one oil cooler base plate or the intermediate plate over the entire Thick penetrating slot is formed, the oil cooler side is sealed by the remaining oil cooler and carrier part side by the support member to the outside environment. The design of the oil cooler bypass duct as a slot, which passes through the oil cooler base plate or the intermediate plate over its entire thickness, makes the production particularly simple, since such a slot can be made with little effort and changed with little effort in its contour as needed.

As an alternative to the embodiment described above, it is proposed that the oil cooler bypass passage in the oil cooler base plate or in the intermediate plate by at least one carrier part side or oil cooler side, pressed into the oil cooler base plate or the intermediate plate bead or milled groove is formed, the carrier part side by the support member or oil cooler side through the remaining oil cooler is sealed to the outside environment. Here, the oil cooler bypass duct is already closed on one side, which simplifies the sealing.

Further, it is preferably provided that the oil cooler bypass channel runs over its entire length in the oil cooler base plate or in the intermediate plate. This embodiment of the oil module has the advantage that the carrier part can obtain a simplified shape, because it is not involved in the leadership of the oil cooler bypass channel.

An alternative embodiment of the oil module provides that a lying in the oil cooler base plate or in the intermediate plate part of the oil cooler bypass passage forms a central portion of the oil cooler bypass passage and that two shorter end portions of the oil cooler bypass passage respectively pass through the carrier part. This embodiment has the advantage that the oil cooler base plate or intermediate plate has a higher stability and dimensional stability, because the lying in the oil cooler base plate or intermediate plate part of the oil cooler bypass passage does not occupy the entire length between an oil inlet and an oil outlet in the form of openings in the oil cooler base plate or intermediate plate. Rather, each remain in the vicinity of the openings for the oil inlet and the oil outlet in the oil cooler base plate or intermediate plate stabilizing material bridges between the openings on the one hand and the central portion of the oil cooler bypass channel on the other.

A further alternative embodiment of the oil module proposes that a part of the oil cooler bypass passage lying in the intermediate plate forms two end sections of the oil cooler bypass passage and that a shorter middle section of the oil cooler bypass passage runs through the carrier part. This embodiment has the advantage that in the region of the middle section of the oil cooler bypass channel, the oil cooler base plate or intermediate plate may have a material bridge, which provides in the same manner as in the embodiment described above for increasing the stability and shape-resistance of the oil cooler base plate or intermediate plate.

To achieve the desired function of the oil cooler bypass duct adherence to a defined flow resistance of the oil cooler bypass duct is essential. In order to meet this requirement, it is provided in a further embodiment of the oil module, that the oil cooler bypass passage has a cross-section having a throttle effect. A change in throttle effect can here through a change in the cross section of the oil cooler bypass passage as a whole can be achieved.

Alternatively, the oil cooler bypass passage in its course may have at least one throttle restriction having cross-sectional constriction. In this embodiment, the flow resistance of the oil cooler bypass passage can be determined by a suitable design or change of the cross-sectional constriction.

A further development provides that the cross-sectional constriction is formed by at least one protruding into the oil cooler bypass passage nose. Such a shape is easy to prepare and easy to change, so that a simple and inexpensive production is guaranteed.

According to a further alternative it is provided that the cross-sectional constriction is formed by at least one Überlap-pungsbereich between one end of the oil cooler bypass passage and a carrier part side, connected to the oil inlet or oil outlet of the oil cooler channel region. A change in the flow resistance of the oil cooler bypass channel can be achieved here by changing the overlap area in size, which can be done, for example, by changing the length of the overlap between oil cooler bypass passage on the one hand and channel area in the support part on the other hand.

For all previously described embodiments of the oil module is preferably provided that the oil cooler base plate or the intermediate plate is a stamped part made of metal, in particular. Light metal, such as aluminum, is .. A stamped part is a particularly inexpensive to produce component that contributes to low production costs of the oil module. The use of metal, in particular light metal, on the one hand ensures good durability and on the other hand for a low weight with good thermal conductivity. Aluminum is particularly suitable here.

Further, the invention provides that the oil cooler base plate or the intermediate plate is made by means of a punching tool with a replaceable tool insert in the region of the oil cooler bypass channel. In this embodiment, a uniform basic punching tool can be used for the production of the oil cooler base plate or intermediate plate, in which then when changing the plate only a tool insert must be replaced.

For such cases, in which alone through the Ölkühlerby passport not the desired temperature-dependent distribution of the oil flow to the oil cooler and the oil cooler bypass passage can be achieved, suggests the inven tion that in the course of the oil cooler bypass passage a valve is arranged, which depends on a pressure difference between the oil inlet and the oil outlet of the oil cooler releases a variable passage cross-section, wherein at lower differential pressure, the passage cross-section is smaller and at a higher differential pressure of the passage cross section is greater '. A low differential pressure arises in particular when the oil is warm, so that then there is a higher cooling requirement for the oil and, accordingly, a larger proportion of the oil is to be passed through the oil cooler. Conversely, with cold oil, a higher differential pressure will occur, resulting in a greater proportion of the oil passing through the oil cooler bypass passage.

In order to produce the oil module in an embodiment with a valve also as inexpensively as possible, it is further provided that the valve is formed by a leaf spring, which is arranged facing in the flow direction of the oil in the oil cooler bypass passage in this, wherein the leaf spring in a not or low differential pressure-loaded state obliquely through the oil cooler bypass passage and in a more differential pressure loaded state from its obliquely extending through the oil cooler bypass passage position in an increasingly parallel to the oil cooler bypass passage extending, an increasing cross-section releasing position is automatically adjustable.

Finally, in the oil module according to the invention with valve can be additionally provided that the leaf spring consists of a bimetallic strip or strip comprises a bimetal strip through which the leaf spring in its position in the oil cooler bypass passage is automatically temperature-dependent adjustable, with an increasing temperature to a reduction of the Passage cross section causing adjustment of the leaf spring leads. With this embodiment of the leaf spring, a temperature-dependent adjustment of the leaf spring forming the valve is additionally achieved. This achieves an even more accurate and more appropriate distribution of the oil flow between the oil cooler and the oil cooler bypass duct.

Figur 1

ein Ölmodul in einer ersten Ausführung im Längsschnitt,

Figur 2

das Ölmodul aus Figur 1 in Draufsicht, teils geschnitten,

Figur 3

und Figur 4 das Ölmodul in einer zweiten Ausführung in einer Darstellungsweise entsprechend den Figuren 1 und 2,

Figur 5

und Figur 6 das Ölmodul in einer dritten Ausfüh-rung, wieder in gleicher Darstellungsweise wie in den Figuren 1 und 2,

Figur 7

und Figur 8 das Ölmodul in einer vierten Ausführung, wieder in gleicher Darstellungsweise wie in den Figuren 1 und 2,

Figur 9

und Figur 10 das Ölmodul in einer fünften Ausfüh-rung, wieder in gleicher Darstellungsweise wie in den Figuren 1 und 2, und,

Figur 11

das in Figur 9 eingekreiste Detail in vergrößerter Ausschnittsdarstellung.

The following will be. Embodiments of the invention explained with reference to a drawing. The figures of the drawing show:

FIG. 1

an oil module in a first embodiment in longitudinal section,

FIG. 2

the oil module off FIG. 1 in plan view, partly cut,

FIG. 3

and FIG. 4 the oil module in a second embodiment in a representation according to the Figures 1 and 2 .

FIG. 5

and FIG. 6 the oil module in a third embodiment, again in the same representation as in the Figures 1 and 2 .

FIG. 7

and FIG. 8 the oil module in a fourth embodiment, again in the same representation as in the Figures 1 and 2 .

FIG. 9

and FIG. 10 the oil module in a fifth embodiment, again in the same representation as in the Figures 1 and 2 , and,

FIG. 11

this in FIG. 9 circled detail in enlarged detail.

FIG. 1 and FIG. 2 show an oil module 1 in a first embodiment, in FIG. 1 in longitudinal section and in FIG. 2 in plan view, partly in a sectional view.

As the Figures 1 and 2 show, the oil module 1 consists of a support member 2, which is a die casting of Leichtme-tall, such as aluminum. The carrier part 2 is here by means of two connecting flanges 20, 20 'connected to an internal combustion engine, not shown, wherein in the flange 20 an oil supply cage 22 and in the flange 20' an oil drainage channel 24 are connected to the internal combustion engine. Furthermore, passes through the support member 2, an oil transfer passage 23 which in FIG. 1 cut is visible.

At his in FIG. 1 up and in the FIG. 2 facing the viewer side, the support member 2 has a Ölkühlerflansch 29, to which an oil cooler 3 flanged sealingly is. In a circumferential sealing groove 29 ', a not specifically shown seal is arranged, which ensures a liquid-tight flange connection.

The oil cooler 3 is of conventional design. On its side facing the carrier part 2, the oil cooler 3 has a base plate 30. The base plate 30 has a plurality of fastening bores 31, which are in FIG. 2 can be seen in the plan view.

The oil inlet 32 is in fluid communication with the Ölzuführüngskanal 22. The oil outlet 33 of the oil cooler 3 is in fluid communication with the oil transfer passage 23rd

Far left in the Figures 1 and 2 the support part 2 has a filter receptacle 28, which serves to accommodate a replaceable oil filter insert and which is liquid-tightly closed by means of a screw cap, not shown here.

Furthermore, the oil module 1 has an oil cooler bypass passage 4, which connects the oil inlet 32 of the oil cooler 3 with the oil outlet 33, bypassing the oil cooler 3.

In the in the Figures 1 and 2 In this case, the bypass channel 4 is formed as the oil cooler base plate 30 through the entire thickness enforcing slot and preferably produced together with the rest of the base plate 30 in a stamping process ,

As the FIG. 2 shows, the oil cooler bypass passage 4 has approximately in its middle between oil inlet 32 and oil outlet 33 here a cross-sectional constriction 40 which is formed by two mutually facing lugs in the base plate 30. Through this cross-sectional constriction 40, a defined flow resistance of the bypass channel 4 is set. If a different flow resistance is desired, this can be effected by a corresponding change in the cross-sectional constriction 40. For this purpose, only the oil cooler base plate 30 must be adapted in its contour of the bypass channel 4. This can be easily done by replacing a tool bit in one used for the manufacture of the base plate 30. Punching tool done.

In addition to the oil inlet 32 and the oil outlet 33, the oil cooler 3 has ever a water inlet 36 and water outlet 37, which provide for the supply and discharge of cooling water, which occurs with the oil: in the oil cooler 3 for cooling the oil in heat exchange. The cooling water is supplied here through a water supply channel 26 and discharged through a water discharge channel 27, which in FIG. 2 are each partially recognizable on the right in the background and which are connected in the installed state on an accompanying Brenhkraftmaschine with continuing water pipes.

For sealing connection of the oil cooler 3 with the support part 2 are the mounting holes 31, through which screws in the support member 2 and provided there threaded holes can be performed. The oil module 1 in total can then be connected with other screws with the internal combustion engine, not shown, these screws through fastening holes 21 which pass through the support member 2, are performed.

During operation of the internal combustion engine, lubricating oil coming from the oil pump of the internal combustion engine flows via the connecting flange 20 through the oil feed channel 22 into the oil module 1. Within the support member 2, the oil flows to the oil inlet 32 of the oil cooler 3. There, the oil flow, wherein a first partial flow of the oil flows through the oil cooler 3 and a second partial flow of the oil through the oil cooler bypass passage 4. At the oil outlet 33 of the oil cooler 3, the two partial flows of the oil reunite and flow together through the oil transfer channel 23 into the filter holder 28. When completed oil module inserted into the filter holder 28 filter element and with screwed filter cover flows through the oil-transfer channel 23 incoming oil radially from outside to inside through the filter cartridge and then through the oil drainage channel 24 via the second connecting flange 20 'back to the engine and in this to be supplied with oil lubrication points.

In addition to the Ölabführungskanal 24 extends through the second connecting flange 20 'still an oil drain passage 25. This oil drainage channel 25 serves' when changing the filter cartridge the. Filter receptacle 28 to empty of oil. The oil drain channel 25 opens inside the internal combustion engine in a non-pressurized area, for example in the oil pan.

Both flange 20, 20 'are sealed by in their shape to the flanges 20, 20' and the channels 22 and 24 and 25 adapted, not specifically numbered seals.

The FIGS. 3 and 4 show a second embodiment of the oil module 1. For this embodiment of the oil module 1 is characteristic, in that parallel to the oil cooler base plate 30, an intermediate plate 5 is provided, which is sealingly arranged between the oil cooler base plate 30 and the oil cooler flange 29 of the carrier part 2. The oil cooler 3 is here of conventional design, whereby the oil cooler base plate 30 is of conventional design, in which the base plate 30 has only the openings for the formation of oil inlet 32, oil outlet 33, water inlet 36 and water outlet 37.

The intermediate plate 5 has in the example according to the FIGS. 3 and 4 an outline corresponding to the outline of the oil cooler base plate 30. Furthermore, the intermediate plate 5 with the. Openings in the oil cooler base plate 30 dekkungsgleiche perforations, each forming a portion of oil inlet 32, oil outlet 33, water inlet 36 and water outlet 37.

The oil cooler bypass passage 4 is in the example of Figure 3 and FIG. 4 completely provided within the intermediate plate 5. For this purpose, the intermediate plate 5 is provided with an over its entire thickness reaching, preferably punched-out slot, which connects the openings, which form the oil inlet 32 and the oil outlet 33 together. In. Course of the oil cooler bypass duct 4, a cross-sectional constriction 40 is also provided here, which defines a defined flow resistance of the bypass channel 4. If another flow resistance of the oil cooler bypass passage 4 is required, a simple and inexpensive change of the intermediate plate 5 suffices. The oil cooler 3 and the support part 2 of the oil module 1 then do not need to be changed.

In its other parts and in its function corresponds to the oil module 1 according to the FIGS. 3 and 4 the oil module 1 according to the previously described Figures 1 and 2 ,

The FIGS. 5 and 6 show the oil module 1 in a third embodiment. For this embodiment of the oil module 1 is characteristic that the oil cooler bypass passage 4 is divided into a plurality of channel sections. As the FIGS. 5 and 6 Illustrated, a longer central portion 41 of the oil cooler bypass passage 4 extends through the oil cooler base plate 30. Connected to this central portion 41 are two end portions 42, 43 of the bypass passage 4 which are each substantially shorter in relation to the central portion 41 and which are each formed in the support member 2. This ensures that the oil cooler base plate 30 in the region between their openings for the oil inlet 32 and the oil outlet 33 on the one hand and the middle portion 41 of the bypass channel 4 on the other hand each have a material bridge that stabilizes the oil cooler base plate 30 and dimensionally stable. Thus, the risk of distortion of the oil cooler base plate 30 is particularly safe avoided.

A desired flow resistance of the oil cooler bypass duct 4 can here preferably be determined by the dimensions of the middle section 41, in particular its width, and, if necessary, selectively changed by changing the width of the central section 41.

In its remaining parts and in its function, the oil module 1 corresponds to the previously explained embodiments according to FIGS FIGS. 1 to 4 ,

The FIGS. 7 and 8 show an oil module 1 in a relation to the FIGS. 5 and 6 modified version. Also in the example according to the FIGS. 7 and 8 The oil cooler bypass passage 4 extends for the most part through the oil cooler base plate 30 and to a lesser extent through the support part 2. Here, the division is chosen so that two generally longer end portions 42, 43 extend through the base plate 30 of the oil cooler 3 and a comparatively shorter center section 41 of the bypass channel 4 extends through the support part 2.

In this embodiment of the oil module 1, a desired flow resistance of the oil cooler bypass passage 4 can preferably be determined by setting a specific cross section of the end section 42, 43 or one of these two end sections 42, 43.

In the remaining parts and in its function, the oil module 1 corresponds to the previously explained embodiments.

The FIGS. 9 and 10 show a fifth embodiment of the oil module 1, which in its basic design the oil module according to the FIGS. 5 and 6 corresponds, but has an additional component. This additional component is a valve 6, which is arranged in the oil cooler bypass duct 4. In the in the FIGS. 9 and 10 As shown, the valve 6 is designed as a leaf valve with a leaf spring 60 and disposed in the inner half of the oil cooler base plate 30 extending middle portion 41 of the oil cooler bypass passage 4 pointing in the flow direction of the oil.

This valve 6 serves to divide the oil flow, which flows through the oil supply passage 22, in a suitable manner to the oil cooler 3 and the oil cooler bypass passage 4. The valve 6 forming the leaf spring 60 is here designed so that it is at a high differential pressure between the oil supply passage 22 and the oil transfer passage 23, as is the case in particular at low oil temperatures and high oil viscosity, due to the adjusting pressure difference on the two sides of the valve 6 in an extended position, in which the valve 6 releases a larger cross section of the oil cooler bypass duct 4. At a lower pressure difference, the valve 6 reduces the cross section of the oil cooler bypass passage 4 due to the restoring force of the leaf spring 60, as in FIGS. 9 and 10 shown, so that then a greater proportion of the oil flow is passed through the oil cooler 3 and cooled.

In its other elements and in its other function corresponds to the oil module 1 according to the FIGS. 9 and 10 the examples described above.

The FIG. 11 finally that shows in FIG. 9 circled detail from the oil module 1 in an enlarged view. In the center of FIG. 11 the valve 6 in the form of the leaf spring 60 can be seen. At the in FIG. 11 right end, the leaf spring 60 is connected to the support member 2, for example, pressed or riveted or welded.

The FIG. 11 shows a state of the valve 6, as it is present at a small pressure difference on the two sides of the valve 6. When the pressure difference is low or completely insufficient, the valve 6 assumes a closed or approximately closed position, whereby the entire or at least the major part of the oil flow is then guided through the oil cooler 3. At higher pressure difference, the moves in FIG. 11 to the left-facing free end of the leaf spring 60 within the central portion 41 of the oil cooler bypass passage 4 down, thereby an increasingly larger passage cross section is released and an increasingly larger part of the oil flow through the oil cooler bypass passage 4 can flow.

In addition to its characteristic as a leaf spring, the valve 6 may additionally consist either of a bimetallic strip or comprise a bimetallic strip in its course. With such a bimetal strip can be additionally achieved that the valve 6 is adjusted automatically depending on the temperature of the oil. In this case, the valve 6 is designed with a bimetallic spring so that at low temperature, the valve 6 releases a larger cross section and at a higher temperature a smaller cross section of the oil cooler bypass duct 4.

Claims (15)

1. Oil module (1) for an internal combustion engine, comprising a carrier element (2) that can be flanged onto an engine block of the internal combustion engine and carries at least one oil filter and an oil cooler (3); said oil module (1) being provided with channels (22, 23, 24, 25; 26, 27; 4) for guiding oil and water, one of said channels being an oil cooler bypass channel (4) connecting an oil inlet (32) of the oil cooler (3) to an oil outlet (33) of the oil cooler (3), characterized in that at least the main part of the oil cooler bypass channel (4) extends through an oil cooler base plate (30) occluding the oil cooler (3) on the carrier element side, or through an intermediate plate (5) arranged between the oil cooler (3) and the carrier element (2) in a sealing manner.
2. Oil module according to claim 1, characterized in that the oil cooler bypass channel (4) is formed in the oil cooler base plate (30) or in the intermediate plate (5) by at least one slit extending over the entire thickness of the oil cooler base plate (30) or the intermediate plate (5), said slit being sealed towards the outside environment on the oil cooler side by the remaining oil cooler (3) and on the carrier element side by the carrier element (2).
3. Oil module according to claim 1, characterized in that the oil cooler bypass channel (4) in the oil cooler base plate (30) or in the intermediate plate (5) is formed by at least one pressed-in bead or milled groove in the oil cooler base plate (30) or the intermediate plate (5) on the carrier element side or the oil cooler side, said bead or groove being sealed towards the outside environment by the carrier element (2) on the carrier element side or by the remaining oil cooler (3) on the oil cooler side.
4. Oil module according to any one of the claims 1 to 3, characterized in that the oil cooler bypass channel (4) extends over its entire length in the oil cooler base plate (30) or in the intermediate plate (5).
5. Oil module according to any one of the claims 1 to 3, characterized in that one part of the oil cooler bypass channel (4) lying in the oil cooler base plate (30) or in the intermediate plate (5) forms a middle section (41) of the oil cooler bypass channel (4) and that two shorter end sections (42, 43) of the oil cooler bypass channel (4) each extend through the carrier element (2).
6. Oil module according to any one of the claims 1 to 3, characterized in that one part of the oil cooler bypass channel (4) lying in the oil cooler base plate (30) or in the intermediate plate (5) forms two end sections (42, 43) of the oil cooler bypass channel (4) and that a shorter middle section (41) of the oil cooler bypass channel (4) extends through the carrier element (2.
7. Oil module according to any one of the claims 1 to 6, characterized in that the oil cooler bypass channel (4) has a cross section comprising a throttling effect.
8. Oil module according to any one of the claims 1 to 6, characterized in that the oil cooler bypass channel (4) has, in its course, at least one cross- sectional narrowing (40) having a throttling effect.
9. Oil module according to claim 8, characterized in that the cross-sectional narrowing (40) is formed by at least one nose protruding into the oil cooler bypass channel (4).
10. Oil module according to claim 8 or 9, characterized in that the cross-sectional narrowing (40) is formed by at least one overlapping area between one end of the oil cooler bypass channel (4) and a channel area (22, 23) on the carrier element side being connected with the oil inlet (32) or oil outlet (33) of the oil cooler (3).
11. Oil module according to any one of the preceding claims, characterized in that the oil cooler base plate (30) or the intermediate plate (5) is a stamping of metal, particularly light metal, such as aluminum.
12. Oil module according to claim 11, characterized in that the oil cooler base plate (30) or the intermediate plate (5) is manufactured by means of a stamping tool with an exchangeable tool insert in the area of the oil cooler bypass channel (4).
13. Oil module according to any one of the preceding claims, characterized in that a valve (6) is arranged in the course of the oil cooler bypass channel (4) which - depending on a pressure difference between the oil inlet (32) and the oil outlet (33) of the oil cooler (3) - releases a modifiable passage cross section, with the passage cross section being smaller at a lower differential pressure and the passage cross section being larger at a higher differential pressure.
14. Oil module according to claim 13, characterized in that the valve (6) is formed by a leaf spring (60) which is arranged in the oil cooler bypass channel (4) pointing into the direction of flow of the oil, with the leaf spring (60) - in a non-loaded or lightly loaded differential pressure condition - obliquely extending through the oil cooler bypass channel (4) and - in a more strongly loaded differential pressure condition - being automatically adjustable from its obliquely extending position through the oil cooler bypass channel (4) into a position increasingly extending in parallel direction to the oil cooler bypass channel (4), releasing an increasing cross section.
15. Oil module according to claim 13 or 14, characterized in that the leaf spring (60) consists of a bimetal strip or comprises a bimetal strip, by which the leaf spring (60) in its position in the oil cooler bypass channel (4) is automatically adjustable depending on the temperature, with an increasing temperature resulting in an adjustment of the leaf spring (60) effecting a reduction of the passage cross section.

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