DE102009025490A1 - Supply line e.g. lubricant supply pipe, for use in internal combustion engine of motor vehicle, has side pieces, where line is displaced from coaxial position of central axis such that central axis and central axis of recess subtend angle - Google Patents

Abstract

The line (2) has a short side piece (2a) and a long side piece (2b), where the line lies opposite to an inner wall surface of a recess and is sealed by a sealing element. The sealing element is arranged at circumference of a connecting piece, where the line is axially moved relative to the recess and displaced from the coaxial position of a central axis such that the central axis of the line and a central axis of the recess subtend an angle. The connecting piece has two convex and/or conical moldings that axially enclose the sealing element at both sides.

Description

The The invention relates to a recess of a line connection sealing fixable supply line, which in relation to a Central axis of the recess relative to this axially movable and by means of at least one on the circumference of a connecting piece the supply line arranged sealing element opposite an inner wall surface of the recess sealingly applied is. Furthermore, the invention relates to a for driving a motor vehicle certain internal combustion engine with a recess having Pipe connection, which a sealing element bearing fitting a supply line for a loader, in particular Exhaust gas turbocharger, with respect to a central axis of the recess axially movable.

A Such supply is in practice, for example, the Lubricant supply used in closed systems. So are for example for an internal combustion engine of a motor vehicle certain loaders, in particular exhaust gas turbochargers, known with the a bearing assembly comprising a stationary housing and a shaft bearing movably mounted relative to the housing are.

at High speed bearing applications for rotating shafts, such as in an exhaust gas turbocharger, the use is of the shaft bearing usually in a floating arrangement as a co-rotating between the shaft and the bearing housing Bearing bush. During operation, a lubricant of the exhaust gas turbocharger generates a hydrodynamic film at the interfaces between the Shaft bearing and the shaft on the one hand and between the shaft bearing and the housing, on the other hand.

The Lubricant is required in operation via the supply line led from the internal combustion engine to the turbocharger. After this The lubricant has gone through the camp, it will be back to the Internal combustion engine returned. this happens with a section designed as a return line the supply line, with the requirements for the seal are lower due to the significantly reduced fluid pressure.

For this is the supply line via an integral seal connected to the engine sealing.

The Internal combustion engine has a recess designed as a bore, wherein one end of the supply line is connected therein. The other end of the supply line usually becomes at the turbocharger attached by means of a clamping plate and screw connections.

There the line connections to the exhaust gas turbocharger and the Internal combustion engine in practice considerable tolerances subject and in the operation of the exhaust gas turbocharger also due to the high operating temperatures due to the associated thermal expansion of the materials to a relative displacement the exhaust gas turbocharger comes relative to the internal combustion engine, the Supply line designed at least partially flexible.

In practice, above all a combination of dimensionally stable, preformed pipes and flexible hoses as supply line used between the internal combustion engine and the turbocharger.

From the US 5,261,237 A A lubricant supply of a turbocharger arrangement is already known which is intended to ensure a load-bearing connection in the region of the line connection of the supply line to the internal combustion engine. At the same time, the supply line is axially movable relative to the recess to allow a relative movement of the connector in the recess of the engine block of the internal combustion engine. This mobility is required to allow the fixing of a plate designed as a connector of the supply line by means of bolts on the engine block, while the recess of the exhaust gas turbocharger movably receives the other end of the supply line. The seal is achieved by means of an arranged between the inner wall surface of the bore and the connector O-ring. In this way, the supply line is slightly displaced outwardly in the recess due to the screwing of the one fitting on the engine block, without adversely affecting the seal.

In a lubricant supply of an exhaust gas turbocharger according to the US 6,247,440 B1 the supply line is fixed in a bore in the engine block by means of a press fit. For this purpose, the connecting piece has a guide portion which can be inserted into the bore and an overlapping region, between which a groove for an O-ring is provided. The supply line is pivotable in the recess about its own central axis, without this affecting the seal. As a result, the desired orientation can be easily adjusted following the sealing connection with the internal combustion engine.

The DE 694 22 601 T2 relates to a lubricant supply for exhaust gas turbocharger, which can be fixed by means of an integral seal on an engine block of an internal combustion engine. The supply line tion has on the one hand designed as a Einführungsendabschnitt connector, on the other hand designed as a mounting flange connection. The fitting designed as an insertion end portion has a seal portion having a plurality of grooves for flexible O-rings and an axial position fixing, designed as a radial extension stop member which abuts the outer surface of the engine block.

The EP 1 512 901 A2 also relates to a lubricant supply of an exhaust gas turbocharger by an internal combustion engine. For this purpose, a connecting piece of the supply line has an elastic ring and a the axial insertion position defining radially projecting flange. At the front end portion of the connector projections are mounted, which form an undercut in the recess of the engine block and fix the supply line in this way reliable.

Also at the FR 2908154 A1 the connection piece of a supply line for the lubricant supply of an exhaust gas turbocharger is inserted into a recess and sealed by means of an O-ring inserted into a groove.

When disadvantageous proves in operation due to the thermal expansion as well as depending on the driving conditions the relative Displacement of the exhaust gas turbocharger with respect to the internal combustion engine, which with an at least partially flexible or elastic Design of the supply line is encountered. Due to the high However, during operation occurring pressure of the lubricant turns out to be the use of hoses or flexible intermediate elements as problematic because it multiplies in the transition area can lead to leaks.

In front In this background, the invention is based on the object to provide significantly improved line connection, in which the use of elastic elements even with a relative movement the elements connected by the supply line largely can be waived. Furthermore, the invention is the task based, an improved line connection of a supply line to create a supercharger on an internal combustion engine.

The the first task is solved with a supply line according to the features of claim 1. The Subclaims relate particularly expedient Further developments of the invention.

According to the invention So provided a supply line, both relative to the Recess in this axially movable as well as in addition a coaxial to the central axis position guided such deflectable is that the center axis of the supply line and the central axis the recess include an angle or intersect each other. Characterized in that the supply line inclined in the recess, So can be tilted, without thereby the sealing effect of the sealing element is impaired according to the invention another degree of freedom for a relative movement of the supply line created opposite the line connection, so that in the Practice on elastic or flexible properties often complete can be waived. Therefore, proven in itself Supply lines made of a dimensionally stable material, for example on metal pipes, accessed by the ensuring optimal protection against leaks is. In departure from the known prior art is doing on a press or screw connection of the connection piece waived in the exception and the contact area between the supply line and the inner wall surface of the recess limited to the sealing element, which thus at the same time determines the maximum outer radial extent. The circumference of the connector is in contrast reset so that the desired limited relative Mobility is guaranteed.

The Invention is not limited to specific applications, so that electrical supply lines according to the teaching of the invention could be realized. In contrast, it is particularly advantageous an embodiment of the invention, wherein the supply line one of an internal combustion engine or an engine of the internal combustion engine associated fluid line is, in particular in motor vehicles compensate for relative movement occurring in operation in an ideal way to be able to and at the same time a maximum of To ensure operational readiness.

there It is particularly practical if the supply line as a lubricant supply line is designed to so the required lubricant supply to appropriately equipped with bearings Ensure aggregates. In addition to the internal combustion engine can also additional lubricant pumps with the supply line according to the invention be connected to the respective unit.

Farther the invention is particularly well suited for a variant, in which the lubricant supply line is a loader, in particular a Exhaust gas turbocharger connects to an internal combustion engine because in particular Exhaust gas turbocharger but also mechanical superchargers, in particular compressors, in particular, from a reliable lubricant supply are dependent.

Farther the invention can be particularly profitable in practice insert if the supply line as a supply line or a drain line is executed, and thus achievable according to the invention Compensation of relative movements equally in the lubricant feed as is ensured in the lubricant return. The each fitting can then also usefully be designed identical, if the fluid pressure substantially varies so as to have a uniform relative mobility of several To reach supply or drain lines.

in principle the connector can be any, in particular rotationally symmetrical Have geometry. It is particularly advantageous, however, if the connector substantially a cylindrical basic shape has, so that the recesses of the line connection in a simple Way can be introduced through a hole.

there is the realization of the supply line not to a specific one Material selection limited. Especially practical on the other hand, if the supply line is dimensionally stable, so as to the desired compressive strength to avoid To achieve leaks.

there it has been shown that, according to another particularly useful modification of the invention, the supply line has a bend, with a short and a long leg. This results in a relative displacement of the means of Supply line connected aggregates preferably to an axial Displacement of the fitting in the recess and only to a reduced extent to a deflection.

In In a simple case, the connector is only the End portion of the supply line, which carries the sealing element. In a particularly reliable design of the invention on the other hand, the connecting piece has two convex or conical, the sealing element axially enclosing on both sides, Formations on whose distance, for example, adjustable or is adaptable to the desired sealing element. hereby the sealing element is in its axial position by the one set respective stops forming formations.

Furthermore indicates according to another practical variant the fitting a receiving the sealing element Groove on. The connector is thus primarily the fixation of the sealing element.

About that In addition, according to a particularly advantageous Modification of the invention, the fitting a against the inner wall surface can be applied stop surface for Limitation of the deflection from the concentric central position to so in a simple way the maximum deflection through the connector and, in particular, one acting on the supply line, to avoid unwanted bending moment.

additionally to the limit of the deflection is determined according to a Another advantageous variant of the invention, in which the supply line a the axial mobility limiting limiting element is associated, the sliding of the supply line from the recess avoided.

For this In particular, a particularly simple development of the Invention in which the limiting element is a cross-sectional area the recess limiting, the supply line aussparendes Has blocking element, so that so the locking element after fixing the supply line partially covers the recess, and so as a stop for the radially extended connector serves. Of course, the blocking element as well executed an automatically acting pawl be, which only the insertion of the supply line allowed in the recess, however, the sliding of the supply line counteracts from the recess.

According to one other, also particularly appropriate variant The invention can the limiting element on the circumference of the supply line abut axially movable and adjacent to one of the recess Be determined area of the line connection. In a simple Case therefore has a larger bounding element as the cross-sectional area of the supply line, but smaller than the fitting sized aperture, which includes the supply line and in turn immovable, for example, on the engine block is set.

Farther It is particularly promising if the supply line in addition to its central axis relative to the recess is rotatable so as to easily an additional To realize the degree of freedom of the relative movement. The order the supply line to the aggregates is so by the possibility to a subsequent change in orientation essential simplified, and thus in particular the assembly and service costs reduced.

In this case, the connecting piece can be interchangeably arranged on the supply line, so as to achieve a modular structure of the respective required supply line. On the other hand, it is particularly advantageous if the connecting piece is integrally connected to the supply line is to reliably prevent leaks.

The Sealing element can vary depending on the purpose of use Materials or combinations of materials exist, and in practice Preferably, such sealing elements are used, the elastic Have material properties.

The second task, one intended to drive a motor vehicle Internal combustion engine with a recess having a line connection is achieved according to the invention, that the supply line is both relative to the recess in this axially movable and in addition from one to the center axis coaxial position is guided deflectable so that the center axis of the supply line and the central axis the recess include an angle, so the center axes intersect each other. This will easily the required Degrees of freedom created to compensate for the relative movement the exhaust gas turbocharger with respect to the internal combustion engine without additional flexible or elastic conduit elements too realize. The supply line thus has a comparatively simple design and high pressure resistance.

The Invention allows for numerous embodiments. To further clarify its basic principle, one of them is in the drawing and will be described below.

These shows in

1 a perspective view of an internal combustion engine with an exhaust gas turbocharger connecting supply line;

2 a sectional view of a supply line receiving recess of the internal combustion engine;

3 a sectional view of a supply line receiving recess of the exhaust gas turbocharger.

1 shows a perspective view of a particular for driving a motor vehicle not shown engine 1 by means of a two unequal legs 2a . 2 B having supply line 2 with an exhaust gas turbocharger 3 connected is.

The respective pipe connection 4 . 5 the supply line 2 on the internal combustion engine 1 and on the exhaust gas turbocharger 3 is determined by the 2 and 3 explained in more detail, which in each case a sectional view of the supply line 2 receiving recess 6 the internal combustion engine 1 on the one hand and one the supply line 2 receiving recess 7 the exhaust gas turbocharger 3 on the other hand. The supply line 2 has at both ends in each case a connection piece 8th on, which is a circumferentially arranged, designed as an O-ring sealing element 9 wearing. This results in a limited axial mobility of the fittings 8th in the recesses 6 . 7 achieved without affecting the sealing effect. In addition, the supply line 2 from one to the central axis 10 the recess 7 . 8th coaxial position so deflectable that the central axis 11 the supply line 2 and the central axis 10 cut the recess each other. To this pivoting movement about a transverse axis to the longitudinal axis of the connector 8th or the supply line 2 to allow has the connector 8th two convex or conical, the sealing element 9 Both sides axially enclosing formations 12 that the sealing element 9 in a groove 13 take up. At the same time forms the connection piece 8th one against an inner wall surface 14 the recess 6 . 7 Applicable stop surface 15 for limiting the deflection from the concentric middle position.

As in 3 shown, has the supply line 2 furthermore a limiting element limiting the axial mobility 16 to slipping out of the connector 8th from the recess 7 to avoid. For this purpose, the limiting element closes 16 the scope of the supply line 2 between the two connectors 8th annular, axially movable, and thus forms an axial stop for the radially expanded connector 8th , By means of a screw connection, not shown, is the limiting element 16 in one of the recesses 7 adjacent area of the line connection 5 fixed.

LIST OF REFERENCE NUMBERS

1

Internal combustion engine

2

supply line

2a

leg

2 B

leg

3

turbocharger

4

line connection

5

line connection

6

recess

7

recess

8th

connector

9

sealing element

10

central axis

11

central axis

12

formation

13

groove

14

Inner wall surface

15

stop surface

16

limiting element

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - US 5261237 A [0009]
• - US 6247440 B1 [0010]
• - DE 69422601 T2 [0011]
• - EP 1512901 A2 [0012]
• FR 2908154 A1 [0013]

Claims (19)

One in a recess ( 6 . 7 ) of a line connection ( 4 . 5 ) sealingly fixable supply line ( 2 ), which with respect to a central axis ( 10 ) of the recess ( 6 . 7 ) axially movable relative to the latter and by means of one at the periphery of a connecting piece ( 8th ) of the supply line ( 2 ) arranged sealing element ( 9 ) against an inner wall surface ( 14 ) of the recess ( 6 . 7 ) can be applied in a sealing manner, characterized in that the supply line ( 2 ) both relative to the recess ( 6 . 7 ) in this axially movable and in addition from a coaxial position of the central axes ( 10 . 11 ) is guided in such a deflectable manner that the central axis ( 11 ) of the supply line ( 2 ) and the central axis ( 10 ) of the recess ( 6 . 7 ) include an angle. Supply line ( 2 ) according to claim 1, characterized in that the supply line ( 2 ) is a fluid line. Supply line ( 2 ) according to claims 1 or 2, characterized in that the supply line ( 2 ) an internal combustion engine ( 1 ) or an engine of the internal combustion engine ( 1 ) assigned. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the supply line ( 2 ) is designed as a lubricant supply line. Supply line ( 2 ) according to claim 4, characterized in that the lubricant supply line a supercharger, in particular an exhaust gas turbocharger ( 3 ) with an internal combustion engine ( 1 ) connects. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the supply line ( 2 ) as a supply pipe or a drain pipe. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the connecting piece ( 8th ) has a substantially cylindrical basic shape. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the supply line ( 2 ) is dimensionally stable. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the supply line ( 2 ) has a bend, with a short leg ( 2a ) and a long leg ( 2 B ). Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the connecting piece ( 8th ) two convex and / or conical, the sealing element ( 9 ) on either side axially enclosing formations ( 12 ) having. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the connecting piece ( 8th ) a the sealing element ( 9 ) receiving groove ( 13 ) having. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the connecting piece ( 8th ) one against the inner wall surface ( 14 ) can be applied stop surface ( 15 ) to limit the deflection. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the supply line ( 2 ) an axial mobility restricting limiting element ( 16 ) assigned. Supply line ( 2 ) according to claim 13, characterized in that the limiting element ( 16 ) a the cross-sectional area of the recess ( 7 ) limiting, the supply line ( 2 ) has aussparendes blocking element. Supply line ( 2 ) according to claim 13 or 14, characterized in that the limiting element ( 16 ) at the periphery of the supply line ( 2 ) is axially movable and in one of the recess ( 7 ) adjacent region of the line connection ( 5 ) is determinable. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the supply line ( 2 ) additionally around its central axis ( 11 ) relative to the recess ( 6 . 7 ) is rotatable. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the connecting piece ( 8th ) with the supply line ( 2 ) is connected in one piece. Supply line ( 2 ) according to at least one of the preceding claims, characterized in that the sealing element ( 9 ) has elastic material properties. An engine intended for driving a motor vehicle ( 1 ) with a recess ( 6 . 7 ) having line connection ( 4 . 5 ), which a sealing element ( 9 ) carrying connection piece ( 8th ) of a supply line ( 2 ) for a loader, in particular exhaust gas turbocharger ( 3 ), in Be train on a central axis ( 10 ) of the recess ( 6 . 7 ) receives axially movable, characterized in that the supply line ( 2 ) both relative to the recess ( 6 . 7 ) axially movable and in addition from a coaxial position of the central axis ( 10 . 11 ) is deflectable such that the central axis ( 11 ) of the supply line ( 2 ) and the central axis ( 10 ) of the recess ( 6 . 7 ) include an angle.

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