WO2019180378A1

WO2019180378A1 - Intake air cooling device for an internal combustion engine

Info

Publication number: WO2019180378A1
Application number: PCT/FR2019/050635
Authority: WO
Inventors: Frédéric WASCAT; Yoann Naudin
Original assignee: Valeo Systemes Thermiques
Priority date: 2018-03-23
Filing date: 2019-03-20
Publication date: 2019-09-26
Also published as: FR3079266B1; FR3079266A1

Abstract

The invention concerns a device for cooling intake air of an internal combustion engine, the cooling device comprising a housing, inside which is housed a bundle body comprising a stack of plates and dissipation devices, the cooling device comprising a docking flange configured to connect the housing to the internal combustion engine, characterised in that the cooling device comprises an assembly member, the housing being at least partially interposed between the docking flange and the assembly member.

Description

DEVICE FOR COOLING AN INTAKE AIR OF

INTERNAL COMBUSTION ENGINE

The invention relates to a cooling system for an intake air of an internal combustion engine. The invention finds a particularly advantageous, but not exclusive, application with turbocharged engines.

The automobile, like many other industries, uses heat exchangers to provide the engine with optimal operating conditions.

The cooling of a heat engine, and more particularly the intake air coming from an outlet of a compressor, requires the use of a heat exchanger to cool this air and to increase the density of the air / fuel mixture.

Nowadays, a heat exchanger for cooling a supercharged air consists of a housing that contains a heat exchange beam body between the intake air to be cooled and a heat transfer fluid.

It is known to fix the heat exchanger for cooling the intake air against the internal combustion engine, via a docking flange which connects the housing of the cooling device to a cylinder head of the engine thermal.

The docking flange must meet certain conditions to allow the heat exchanger to be perfectly maintained against the internal combustion engine. Indeed, the latter must withstand significant mechanical stresses resulting from the weight of the cooling device, the attachment mode thereof and the overhang that the docking flange can suffer.

In addition, the heat exchanger is placed not far from the combustion chambers where the temperature can reach 700 ° C. The heat exchange bundle is also traversed by a cooling fluid which is at a temperature of the order of 50 ° C and by a flow of intake air whose temperature is commonly above 200 ° C. These temperatures are far apart and generate significant thermal stresses on the docking flange of the cooling device.

It is known to secure the docking flange to the housing by means of brazing by the Nocolok process. This solidarity, which aims to braze simultaneously a set of components of the cooling device, must ensure a perfect seal between the housing and the sealed docking flange, at a connection area.

The disadvantage of such an assembly is the difficulty in obtaining, reliably and repeatedly, a perfect seal between the housing and the docking flange to the right of the connection area. When this connection is not effective all along the connection zone between the housing and the docking flange, a leakage fault appears which allows part of the intake air flow to escape the circuit intake. Such a situation is unacceptable and highly detrimental since it requires the disposal of a cooling device in the finished state, after having been brazed according to the Nocolok process.

The assembly exposed above suffers from another disadvantage. Indeed, the use of the Nocolok process requires the use of a material covered with a melting layer which realizes the joining of the parts together, especially at the connection area. This connection area is on one side of the docking interface which also serves as a joint plane, against which rests a seal disposed between the docking flange and the cylinder head. The joint plane of the docking interface is thus covered by the melting layer which, once the Nocolok process has been implemented, generates asperities on the joint plane. Such roughness requires the implementation of an additional step of surfacing, to bring the joint plane to the surface coefficient acceptable for the joint.

The present invention corrects the disadvantages mentioned above and thus relates to a cooling device of an intake air of an internal combustion engine, the cooling device comprising a housing inside which is housed a beam body consisting of a stack of plates and dissipation devices, the cooling device comprising a docking flange configured to connect the casing to the internal combustion engine, characterized in that the cooling device comprises an assembly member, the housing being at least partially interposed between the docking flange and the assembly member.

The placement of the housing between the docking flange and the assembly member has the following advantages:

- Compared with the prior art, the invention moves the position of the connection zone between the housing and the docking flange, since the housing encircles the folded edge of the docking flange by the outside thereof . This new arrangement allows the installation of the assembly member which compresses the housing against the folded edge, and therefore against the flange docking. In this way, the sealing zone of the connection between the casing and the docking flange is improved by adding a compressive force which plates the casing on the docking flange before being secured by the Nocolok process. After joining the housing and the docking flange, the assembly member is itself secured to the latter during the implementation of the Nocolok process,

- By moving the connection area on an inner face of the docking flange, it then becomes unnecessary to use a material that has a melting layer on each of these faces. The outer face of the docking interface may be devoid of this layer of fusion, which eliminates any formation of asperity. The outer face of the docking interface, that is to say the joint plane, therefore does not require post-processing recovery after the implementation of the Nocolok process.

The docking flange thus comprises an inner face, which comprises the zone of connection with the casing, and an outer face which comprises the joint plane. The inner face is the leading side of the folded edge of the docking flange against which the housing abuts and extends within a cavity of the docking flange. The outer face is the face intended for the connection between the docking flange and the internal combustion engine, and which is opposite to the inner face relative to the constituent material of the docking flange.

According to one characteristic, the assembly member extends into a cavity delimited by the docking flange. In this way, the assembly member is in permanent contact with the housing which it holds against the docking flange. The cavity is delimited by the internal face of the docking flange. The cavity has a section "U" shape, viewed in a cross section of the docking flange.

According to one feature, the assembly member comprises a central section, a first lateral section and a second lateral section as well as a central section connecting the first lateral section to the second lateral section, the first lateral section, the central section and the second lateral section being shaped in "U". The assembly member is thus composed of at least three sections, each extending section disposed substantially at right angles to the immediately adjacent section, viewed in a cross section of the assembly member. The assembly member thus has a U-shape, seen according to this section.

Thus, the assembly member takes the form of the docking flange. The assembly member is thus housed in the cavity of the docking flange and thus has a profile similar to the profile of the docking flange, seen in section. Advantageously, a dimension of the assembly member, measured between the first lateral section and the second lateral section, is greater than a dimension measured between the housing and a peripheral reinforcement constituting the docking member. Effective plating of the casing against the folded edge is guaranteed.

In other words, a central section of the assembly member is arranged between two lateral sections, seen in cross-section. The docking flange comprises on its side a flat portion and two folded edges formed on each side of the flat portion. The flat portion and the folded edges delimit the cavity. According to one aspect of the invention, a dimension of the central section of the assembly member is greater than a dimension of the flat portion deduced from a thickness of the housing, measured in the same plane and along the same direction. Such a conformation ensures the existence of a compressive force exerted by the assembly member against the housing.

According to one characteristic, a thickness of the assembly member is less than a thickness of the docking flange. The assembly member is thus more flexible and can be deformed to become housed in the cavity of the docking flange, while the docking flange is of a thickness that allows it to withstand the stress of compression generated by the housing in response to the support operated by the assembly member.

According to one characteristic, the assembly member and the docking flange has a similar profile, seen in a cross section at the assembly member and the docking flange. The assembly member thus has a general shape complementary to the shape of the docking flange. It is for this reason that the assembly member can be housed in the docking flange. The assembly member thus has a complementarity of section with the section of the docking flange, seen in a plane perpendicular to the docking flange and the assembly member, and which cuts the docking flange. and the assembly member.

Note that the docking flange and the assembly member have a similar shape, seen in a plane in which extends mainly the docking flange. Indeed, whatever the embodiment of the assembly member, it has a rectangular shape when the docking flange has a rectangular shape.

According to one characteristic, the docking flange comprises a folded edge and a peripheral reinforcement connected to one another by a docking edge, the assembly member being in contact with the docking edge of the flange. docking. The docking edge is the area of the docking flange against which a seal is arranged to seal the link between the cooling device according to the invention and the internal combustion engine which carries it.

According to one characteristic, the docking flange comprises at least one fastening means and the assembly member comprises at least one orifice superimposed on at least one fastening means of the docking flange. Thanks to the presence of these holes superimposed on the fastening means of the docking flange, the installation of the assembly member does not interfere with the connection of the docking flange against the internal combustion engine, which is an initial goal of the docking flange. Once secured by brazing, the assembly member becomes a mechanical reinforcement that maintains a good flatness of the docking flange.

According to one characteristic, the assembly member is composed of at least two distinct parts, comprising at least three branches that extend in the same plane, each branch forming an angle with respect to the immediately adjacent branch.

According to another characteristic, the assembly member is composed of two distinct parts, comprising only two branches which extend in the same plane, a main branch forming an angle with respect to the adjacent secondary branch.

According to yet another characteristic, the assembly member is composed of four distinct parts that have a straight profile. These are four bars that can easily be installed in the cavity of the docking flange.

The above provisions are embodiments of the assembly member which are intended to facilitate its installation within the cooling device.

According to one characteristic, the housing comprises at least one locking means against which the assembly member bears. The position of the assembly member against the housing is thus guaranteed, without the risk of accidentally escaping the assembly member.

According to another characteristic, the docking flange comprises at least one locking device against which the assembly member bears. The position of the assembly member against the docking flange is thus guaranteed, without the risk of accidentally escaping the assembly member.

According to a method of assembling a housing and a docking flange of a cooling device, at least the following steps are provided:

an inner face of the housing is positioned against a folded edge of the docking flange, a second lateral section of the assembly member is blocked against the docking flange,

a force is exerted on the assembly member until a first lateral section compresses the casing against the folded edge.

Advantageously, the second lateral section is locked against the docking flange by bearing against at least one locking means of which the docking flange is provided.

Advantageously, the first lateral section is locked against the housing by bearing against at least one locking means whose housing is provided.

According to a method of manufacturing the cooling device of an intake air, at least:

a step of assembling the beam body,

a step of positioning the beam body in the housing,

a step of assembling the housing and the docking flange,

a step of clamping the housing against the docking flange by means of an assembly member; advantageously the housing is clamped against an outer face of a folded edge of the docking flange,

a step of simultaneously soldering at least the housing, the docking flange and the assembly member.

Advantageously, the soldering step makes it possible to connect in one operation the beam body, the housing, the docking flange and the assembly member. The brazing step is carried out by Nocolok process.

Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below as an indication in relation to drawings in which:

FIG. 1 is a perspective view of the cooling device of an intake air of an internal combustion engine according to the prior art,

FIG. 2 is a perspective view of the cooling device of an intake air of an internal combustion engine according to the invention,

FIG. 3 is a perspective view of the assembly member operated in the cooling device that is the subject of the invention, according to one embodiment, FIG. 4 is a perspective view of the assembly member according to a second embodiment,

FIG. 5 is a perspective view of the assembly member according to another embodiment,

- Figure 6 is a schematic view of the assembly method of the housing against the docking flange, by means of the connecting member according to any one of the embodiments.

It should first be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate. In the different figures, the identical elements bear the same reference numbers.

In the present description, the term "length" refers to the largest dimension of a component of the cooling device, "thickness" being the smallest dimension measured perpendicularly to the largest dimension, and "width" being the dimension of the component perpendicular to both times. its length and thickness.

The use in the following description of the internal or internal terms implies a positioning inwardly of the cooling device, in particular towards an axis passing in the center of the beam body of the cooling device. The use in the following description of external or external terms implies positioning facing the external environment surrounding the cooling device.

FIG. 1 represents a general perspective view of the cooling device 1 of an intake air of an internal combustion engine according to the prior art. The cooling device 1 comprises a housing 2, a beam body 3 and a docking flange 4.

The housing 2 comprises four flanks 21, parallel in pairs, for forming the housing 2 parallelepipedal shape, or cubic. The housing 2 delimits an inlet surface 22 and an outlet surface 23, parallel to each other, allowing a flow of intake air to enter and exit the housing 2, thus passing through the housing 2 in its entirety. that is to say, from one side to the other.

The beam body 3 is housed inside the casing 2 and consists of a stack of plates 31 and dissipation devices 32. The stack consists of the following manner: an alternation of a pair of plates 31 and a device for dissipation 32. Between the two plates 31 of the pair of plates, a heat transfer fluid flow circulates parallel thereto. In addition, a pair of dissipation devices 32 is disposed on either side of the plates 31, flanking them. This organization is subsequently repeated along an axis perpendicular to a general plane of extension of the plates 31, to fill the housing 2 in its entirety, thus forming the beam body 3.

The flow of intake air passing through the housing 2 passes between the pairs of plates, along the dissipating devices 32 and licking them. A dissipation device 32 takes the form of a fin or a spacer. Thus, a heat exchange takes place between the coolant flowing between the two plates 31 and the flow of intake air flowing outside the two plates 31. The heat exchange surface is increased at means of dissipation devices 32.

A docking flange 4 is placed at the outlet surface 23 of the casing 2. The docking flange 4 surrounds the casing 2 which rests against the folded edge 41 of the docking flange 4. The casing 2 is inserted inside the docking flange 4. In this way, the casing 2 is recessed on the docking flange 4.

The docking flange 4 further comprises a docking edge 43 on which fixing means 44 are present to allow the attachment of the docking flange 4 against the internal combustion engine. The fastening means 44 are orifices allowing insertion, for example, of a screw which, once tightened, keeps the docking flange 4 against the internal combustion engine. In order to make reliable the tightening of the docking flange 4 against the internal combustion engine, the fastening means 44 are distributed on the docking edge all around the casing 2.

FIG. 2 represents a general perspective view of the cooling device 1 of an intake air of an internal combustion engine according to the invention. The cooling device 1 comprises a housing 2, a beam body 3, a docking flange 4. The cooling device 1 also comprises an assembly member 5. Once pre-assembled, these components are simultaneously secured to one another during a brazing step according to a Nocolok process.

The housing 2 and the beam body 3 are made and organized identically to what has been described with respect to FIG. 1. Reference is therefore made to the description of FIG. 1 for their implementation.

The docking flange 4 comprises a folded edge 41, the docking edge 43 such that FIG. 1 and a peripheral reinforcement 45. The folded edge 41, the docking edge 43 and the peripheral reinforcement 456 delimit a cavity 10 intended to receive at least one assembly member 5.

Such a folded edge 41 results from folding at right angles, or substantially at right angles, an inner band of the docking flange 4.

In order to withstand the large mechanical forces generated by the clamping of the cooling device 1 against a face of the internal combustion engine, a peripheral reinforcement 45 is formed on the docking flange 4 during a stamping operation. This peripheral reinforcement 45 takes the form of a fold substantially at right angles to an outer peripheral band of the docking flange 4. In this way and as mentioned above, the docking flange 4 has a section in the form of "U", observed in cross-section at the docking flange 4. The presence of such a peripheral reinforcement 45 significantly increases the mechanical strength of the docking flange 4, in particular when this is achieved by a step d stamping.

The docking flange 4 also comprises ears where the fixing means 44 are arranged. This is a localized widening of the docking edge 43 which offers the possibility of disposing of a screw or a nut and a washer. .

The docking flange 4 forms an open strapping at its center. This docking flange 4 comprises, seen in cross-section, a central portion and two lateral portions formed by edges bent substantially at 90 ° with respect to a plane in which the central portion extends. One of the side portions is the folded edge 41 of the docking flange 4, against which the housing 2 bears. The other lateral portion is the peripheral reinforcement 45. The central portion and the docking edge 43.

The docking flange 4 is placed at the outlet surface 23 of the casing 2. The casing 2 surrounds the docking flange 4, coming to rest against the folded edge 41 of the docking flange 4. In addition, In other words, the docking flange 4 is housed in the casing 2.

After insertion of the docking flange 4 in the casing 2, an outer face 411 of the folded edge 41 is in contact with an inner face 213 of the flanks 21 at a connection zone between the casing 2 and the flange of the casing. docking 4, this connection area forming a bonding strip between these two components. The casing 2 is blocked on the docking flange 4 by a widening created by a rounding connecting the folded edge 41 to the docking edge 43 of the docking flange 4. In this way, the docking flange 4 is recessed in the housing 2. The docking flange 4 comprises a docking edge 43 on which fixing means 44 are present to allow the attachment of the docking flange 4 against the internal combustion engine. The docking edge 43 is formed by the central portion of the docking flange, seen according to its cross section. The docking edge 43 comprises a joint plane, that is to say a zone configured to seal with a seal. This seal is disposed between the docking flange 4 and the cylinder head of the internal combustion engine which receives the cooling device 1.

The docking flange 4 also comprises ears in the vicinity of which the fastening means 44 are arranged. It is a localized widening of the docking edge 43 and a deformation of the peripheral reinforcement 45 which offer the possibility of arrange a screw head or nut and washer.

According to the invention, an assembly member 5 is installed in the cooling device 1 so as to press the housing 2 against the docking flange 4, to the right of the connection zone. This assembly member 5 makes it possible to clamp the housing 2 against the folded edge 41 when the cooling device 1 is in a pre-assembly state.

This assembly member 5 takes a shape complementary to the shape of the docking flange 4, that is to say, a "U" shape seen in cross-section to the assembly member 5. View in this section, the assembly member 5 comprises a central section 51 which rests against the docking edge 43 of the docking flange 4, and two lateral sections which rest, for a first lateral section 58 against an outer face 212 flanks 21 of the housing 2, and for a second lateral section 59, against the peripheral reinforcement 45 of the docking flange 4, in particular against the inner face of this peripheral reinforcement 45.

This configuration therefore implies that the flanks 21 of the housing 2 envelop the outer face 411 of the folded edge 41, the first lateral section 58 of the assembly member 5 being in contact against the outer face 212 of the flanks 21 of the housing 2.

In order to allow the attachment of the docking flange 4 against the internal combustion engine, the assembly member 5 comprises orifices 57 superimposed on the fastening means 44 of the docking flange 4. In this way, the use of any connecting means, such as screws, nuts or other, will not be disturbed by the presence of the assembly member 5 when placed against the docking flange 4. The assembly member 5 also constitutes a reinforcing element of the docking flange 4, by increasing the thickness of the part resulting from the joining of the assembly member 5 with the docking flange 4. This increases the torsional resistance of the docking flange 4, thereby reducing the number of fastening means 44.

Like the docking flange 4, the assembly member 5 is of generally rectangular shape. According to various embodiments which are detailed in FIGS. 3 to 5, the assembly member 5 is split up into several distinct pieces. These embodiments are intended to provide an assembly member 5 whose installation on the docking flange is facilitated.

Figure 3 is a perspective view of the connecting member 5 operated in the cooling device 1, according to a first embodiment. Of rectangular shape, seen according to a flat general plane in which extends mainly the assembly member 5, the latter consists of two separate parts 54. Each separate part 54 comprises three branches 55 which extend in the same plane each leg 55 forming an angle 56, for example a right angle, with respect to the immediately adjacent leg 55. Each separate piece 54 thus formed thus comprises a central branch at the ends of which two lateral branches extend in a direction perpendicular to a majority extension direction of the central branch. Viewed in the flat general plane, each separate piece 54 forms a "U" where the central branch is of greater length than one and / or the other side branches.

In a plane perpendicular to the flat general plane exposed above and passing through the assembly member 5, each piece 54 takes the form of a "U" and thus comprises the central section 51 lined on one side by the first section 58 and the other by the second lateral section 59.

The two separate parts 54 forming the assembly member 5 are provided on their central section 51 with orifices 57 which, when the assembly member 5 is affixed against the docking flange 4, are superimposed on the fastening means of FIGS. the docking flange 4.

According to this first embodiment, the assembly member 5 comprises only two separate parts 54 which are arranged opposite each other in the flat general plane. The two separate parts 54 of this first embodiment are identical.

Once assembled on the docking flange, two spaces 53 are apparent between the two distinct pieces 54, each space 53 being formed between one of the lateral branches of one of the separate pieces 54 and one of the lateral branches of the other of the separate rooms 54. Figure 4 is a perspective view of the assembly member 5 operated in the cooling device 1, according to a second embodiment. As presented in the previous mode, the assembly member 5, produced according to this mode, consists solely of two separate pieces 54.

Each separate part 54 comprises only two branches 55 which extend in the same plane, each branch 55 forming an angle 56, for example a right angle, with respect to the immediately adjacent branch 55. Each separate piece 54 thus formed thus comprises a main branch at the end of which a secondary branch extends along a direction perpendicular to a majority extension direction of the main branch. Viewed in the flat general plane, each separate piece 54 forms an "L" where the main branch is of greater length than the secondary branch.

These separate parts 54 are instead installed head to tail opposite each other. The two distinct pieces 54 are symmetrical to one another with respect to a plane of symmetry passing through two angles 56 opposite to each other with respect to the beam body.

Two spaces 53 are formed between each separate piece 54 and, in this second embodiment, these spaces 53 are made at the corners of the docking flange.

According to this second embodiment, the assembly member 5 comprises a slot 60 formed at the angle 56 which connects the main branch to the secondary branch of the separate part 54. This slot 60 is intended to allow some opening the angle 56, thus providing a positional flexibility between the main branch and the secondary branch to facilitate the installation of the separate part 54 on the docking flange. In one example, such a slot 60 intersects the first lateral section 58 and the central section 51. On the other hand, the slot 60 does not cut the second lateral section 59.

The shape of each distinct piece 54, seen in section, is identical to that described in the preceding figures. It is the same for the orifices 57 which are intended to be superimposed on the fastening means of the docking flange. Reference is made to the above description of these technical characteristics to implement them in the context of this second embodiment.

Figure 5 is a perspective view of the assembly member 5 operated in the cooling device 1, according to a third embodiment. Unlike the previous embodiments, the assembly member 5 made in this mode consists strictly or at least four separate pieces 54. Each separate piece 54 comprises a single branch 55 of rectilinear shape. Each separate piece 54 is thus formed of four bars arranged all around the housing of the cooling device according to the invention.

In this embodiment, each separate piece 54 is separated from the immediately adjacent separate piece by a space 53. The assembly member 5 thus has four spaces 53 positioned at the angles 56 formed between the four separate pieces 54 forming the assembly member 5.

The shape of each distinct piece, seen in section, is identical to that described in the preceding figures. It is the same for the orifices 57 which are intended to be superimposed on the fastening means of the docking flange. Reference is made to the above description of these technical characteristics to implement them in the context of this second embodiment.

FIG. 6 is a partial cross-sectional view of the docking flange 4, the casing 2 and the assembly member 5, illustrated during the assembly of the assembly member 5.

FIG. 6 shows that the peripheral reinforcement 45 comprises at least one locking device 47 intended to hold the assembly member 5 in place during its compression phase towards the docking flange 4. The locking device 47 forms a foot support around which the assembly member 5 during its insertion tilts against the docking flange 4.

The locking device 47 takes the form of one or more tongues, made by cutting and / or deformation of the peripheral reinforcement 45. The locking device 47 emerges from the inner face 46 of the docking interface 4, towards the folded edge 41 of the same docking flange 4. This tongue which forms an embodiment of the locking device 47 has an edge 48 against which a first wafer 61 the assembly member 5 bears, when installed in the docking flange 4.

FIG. 6 also shows that the outer face 212 of the sidewalls 21 of the casing 2 is provided with at least one locking means 62 intended to hold the assembly member 5 in the cavity 10 of the docking flange 4, once compressed against the housing 2. The locking means 62 takes the form of one or more buttresses that emerge from the outer face 212 of the flank 21 concerned, in the direction of the peripheral reinforcement 45. The buttress is made by cutting and / or deformation of the flank 21 constituting the housing 2. This buttress which forms an embodiment of the locking means 62 has a stop 63 against which a second wafer 64 the assembly member 5 bears, of to lock the position of the assembly member 5 which plates the housing 2 on the docking flange 4.

Thus, the use of the assembly member 5 ensures optimum retention of the housing 2 against the assembly flange 4. Indeed, the first lateral section 58, resting against the outer face 212 of the flanks 21 of the housing 2, is locked through the locking means 62 on the outer face 212 of the sides of the housing 2, while the second lateral section 59, resting against the peripheral reinforcement 45, is held against the latter through the devices 47. The assembly member 5 is thus locked on the docking flange 4, waiting for the soldering step according to the Nocolok process where these parts will be permanently secured.

The assembly member 5 is manufactured by stamping a sheet, for example aluminum or an aluminum alloy compatible with the material that constitutes the docking flange 4 and the housing 2.

From a dimensional point of view, a dimension L of the assembly member 5, measured between the first lateral section 58 and the second lateral section 59 of the assembly member 5 is greater than a dimension 1 measured between the outer face 212 of the flank 21 concerned and the peripheral reinforcement 45. Such a comparison is made before joining by brazing according to the Nocolok method and ensures a sufficient effort to press the flank 21 against the folded edge 41, at the connection zone 65 between housing 2 and docking flange 4.

Note also that a thickness of the assembly member 5 is less than a thickness of the docking flange 4. This gives the flexibility required for the insertion of the assembly member 5 in the cavity 10 the docking flange 4.

The installation of the assembly member 5 is done after the insertion of the housing 2 on the docking flange 4. The installation of the assembly member 5 is broken down into three successive stages represented by three referenced illustrations. (a), (b) and (c) of the figure

6.

The first step, represented by the illustration (a), comprises a positioning of the first portion 61 of the assembly member 5 against the edge 48 of the locking device 47. The dimension L of the assembly member 5 being greater than the dimension 1 measured between housing 2 and peripheral reinforcement 45, the assembly member 5 is inclined relative to the plane in which extends mainly from the docking flange 4. A non-zero angle is thus formed between the central section 51 of the assembly member 5 and the docking edge 43 of the docking flange 4. The second step, represented by the illustration (b), comprises a compressive action 7 which is exerted on the central section 51 of the assembly member 5 and particularly at the angle formed by the central section 51 and the first lateral section 58. This compressive action 7 is oriented towards the docking flange 4 and aims to drive the central section 51 of the assembly member 5 towards the docking edge 43 of the docking flange 4. In doing so, a support is generated between an inner face 213 of the flank 21 and the inner face 46 of the docking flange 4 at the folded edge 41. The connection zone 65 is the seat of this support.

The first lateral section 58, which is initially in unstable contact with the outer face 212 of the flanks 21 of the casing 2, slides along this outer face 212 to the placement of the central section 51 against the inner face 46 of the flange. 4, at the docking edge 43 thereof, as shown in the illustration referenced (c). The maximum force is then generated between the housing 2 and the docking flange 4, at the connection zone 65, which ensures continuous contact over the entire periphery of the folded edge 41 prior to the soldering step, and thus continuous and leak-free brazing at the connection area 65.

A step of locking the assembly member 5 against the docking flange 4 is then implemented with the aid of the locking device 47 and the locking means 62 detailed above.

It is understood from the foregoing that the present invention provides a cooling device of an intake air of an internal combustion engine configured to make its sealing more reliable. This cooling device, intended to be integrated in an intake air circuit and a heat transfer fluid circuit of a thermal vehicle, offers an easy solution to implement and at a lower cost to guarantee a contact between the housing and the flange. docking that ensures a perfect seal. This avoids the disposal of finished products, after they have undergone an expensive soldering step.

The invention, however, can not be limited to the means and configurations described and illustrated here, and it also extends to any equivalent means or configuration and any technical combination operating such means. In particular, the shape of the connecting member and / or the shape of the docking flange can be modified without harming the invention, insofar as the cooling device, in fine, fulfills the same functionalities as those described in this document.

Claims

1. Cooling device (i) of an intake air of an internal combustion engine, the cooling device (1) comprising a housing (2) inside which is housed a beam body (3) consisting of a stack of plates (31) and dissipation devices (32), the cooling device (1) comprising a docking flange (4) configured to connect the housing (2) to the internal combustion engine, characterized in that the cooling device (1) comprises an assembly member (5), the housing (2) being at least partially interposed between the docking flange (4) and the connecting member (5). ).

2. Cooling device (1) according to the preceding claim, wherein the connecting member (5) extends into a cavity (10) defined by the docking flange (4).

3. Cooling device (1) according to any one of the preceding claims, characterized in that the docking flange (4) comprises a folded edge (41) and a peripheral reinforcement (45) connected to one another. other by a docking edge (43), the connecting member (5) being in contact with the docking edge (43) of the docking flange (4).

4. Cooling device (1) according to any one of the preceding claims, characterized in that the assembly member (5) comprises a central section (51), a first lateral section (58) and a second lateral section. (59) and a central section (51) connecting the first lateral section (58) to the second lateral section (59), the first lateral section (58), the central section (51) and the second lateral section (59). ) being shaped in "U".

5. Cooling device (1) according to the preceding claim in combination with claim 3, characterized in that a dimension (L) of the connecting member (5), measured between the first lateral section (58) and the second lateral section (59) is greater than one dimension (1) measured between the housing (2) and the peripheral reinforcement (45).

Cooling device (1) according to one of the preceding claims, characterized in that the docking flange (4) comprises at least one fastening means (44) and in that the connecting member (4) 5) comprises at least one orifice (57) superimposed on the attachment means (44) of the docking flange (4).

Cooling device (1) according to one of the preceding claims, characterized in that the housing (2) comprises a locking means (62) against which the assembly member (5) bears.

8. Cooling device (1) according to any one of the preceding claims, characterized in that the docking flange (4) comprises a locking device (47) against which the connecting member (5) is supported .

9. A method of assembling a housing (2) and a docking flange (4) of a cooling device (1) according to any one of the preceding claims, in which: one face is positioned interior (211) of the housing (2) against a folded edge (41) of the docking flange (4), - a second lateral section (59) of the assembly member (5) is locked against the flange of (4), a force is exerted on the assembly member (5) until a first lateral section (58) compresses the casing (2) against the folded edge (41).

10. A method of manufacturing a cooling device (1) of an intake air according to any one of claims 1 to 8, comprising at least:

a step of assembling the beam body (3),

a step of positioning the beam body (3) in the housing (2),

a step of assembling the housing (2) and the docking flange (4),

a step of clamping the casing (2) against the docking flange (4) by means of an assembly member (5),

a simultaneous soldering step at least of the housing (2), the docking flange (4) and the assembly member (5).