Protective device for a component of a vehicle
A single-piece protective device with integrated fastening and thermal insulation addresses the issues of cost and assembly complexity in cable attachment for vehicle catalytic reduction systems, ensuring robust and efficient cable retention.
Patent Information
- Application Number
- FR2021014099
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-12-21
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2041-12-21
AI Technical Summary
Existing cable fastening systems for vehicle catalytic reduction systems are expensive, require drilling which reduces thermal insulation, and are difficult to assemble.
A protective device with a fastening system integrated into a single-piece protective enclosure, using thermal insulating material and non-aligned fastening elements to secure cables, eliminating the need for drilling and reducing assembly costs.
The solution provides a simple, cost-effective, and thermally insulated cable attachment system that minimizes movement and assembly time, while maintaining effective thermal protection.
Smart Images
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Abstract
Description
Title of the invention: Protective device for a component of a vehicle.
[0001] The invention relates to a protective device for a component of a vehicle. The invention also relates to a motor system comprising such a protective device. The invention further relates to a motor vehicle comprising such a protective device or such a motor system.
[0002] In an internal combustion engine vehicle, the combustion products include pollutants such as nitrogen oxides. A catalytic reduction system is required to transform these products into less polluting or non-polluting substances before they are released as exhaust gases. Sensors connected to various locations within the catalytic reduction system are required to optimize the treatment of the exhaust gases. These sensors are connected via a wiring system to a control unit.
[0003] Furthermore, such a catalytic reduction treatment system emits a great deal of heat. The temperature at its surface is on the order of 350°C. A thermal protection device surrounding such a catalytic reduction treatment system is required.
[0004] It appears important to be able to attach such cables to avoid excessively high amplitudes of movement of such cables when the vehicle is moving.
[0005] Cable fastening systems are known. However, these solutions have drawbacks. In particular, they are expensive.
[0006] The object of the invention is to provide a device that overcomes the above drawbacks and improves upon known prior art devices. In particular, the invention makes it possible to create a device that is simple to manufacture, quick to assemble, and has a reduced cost.
[0007] To this end, the invention is based on a protective device for a vehicle component, in particular intended to cover at least partially a vehicle component, in particular a catalytic reduction treatment system for an engine, the device being characterized in that it comprises a protective cover and an attachment system for an electrical connection cable, the attachment system being mechanically linked to the protective cover, the attachment system comprising at least one attachment element, and in that it comprises a layer of at least one thermal insulating material, intended to be disposed between said vehicle component and said cover and the attachment system.
[0008] The layer made of at least one thermal insulating material may include glass wool.
[0009] the fastening system and the casing can be in the form of a single piece, in particular formed by stamping in the same step, for example from a sheet, in particular sheet metal, for example aluminium.
[0010] The fastening system may include several fastening elements, in particular three fastening elements arranged in a non-aligned manner.
[0011] At least one fastening element may be in the form of a bump or a stud or a pad or a tongue, the outer wall of the casing and the outer wall of the fastening system forming in particular a continuous surface.
[0012] At least one fastening element may be filled with at least one thermal insulating material.
[0013] At least one fastening element may be in the form of a tab, in particular mechanically linked at only one of its ends to the casing.
[0014] The layer of at least one thermal insulating material may be flush with the surface of the envelope at the location of at least one attachment element.
[0015] The invention also relates to a motorization system, characterized in that it comprises a heat engine or internal combustion engine, and in that it comprises a protection device as described above.
[0016] The invention also relates to a vehicle, in particular a motor vehicle, comprising a protection device as described above or a motorization system mentioned above.
[0017] The attached drawings represent, by way of example, an embodiment of a protection device according to the invention.
[0018] [Fig-1] The [Fig. 1] represents a catalytic reduction treatment system for an engine.
[0019] [Fig.2] The [Fig.2] is a cross-sectional view representing a catalytic reduction treatment system for an engine.
[0020] [Fig.3] The [Fig.3] is a partial view representing an embodiment of a protective device, an electrical connection cable being held by the attachment system of the protective device.
[0021] [Fig.4] Fig.4 represents an embodiment of a protective device, an electrical connection cable being held by the attachment system of the protective device.
[0022] [Fig.5] The [Fig.5] is a partial view representing an embodiment of a protective device comprising an attachment system according to an alternative embodiment.
[0023] [Fig.6] The [Fig.6] is another view of the protection device according to the [Fig.5].
[0024] An example of a vehicle 1 equipped with a catalytic reduction system for an engine is described below with reference to Figures 1 and 2.
[0025] Vehicle 1 may be a motor vehicle, for example a motor vehicle with a thermal engine, including in particular an internal combustion engine 3.
[0026] Vehicle 1 includes, for example, a catalytic reduction treatment system 5, in particular of the SCR type (an acronym of Anglo-Saxon origin for "Selective Catalytic Reduction").
[0027] The catalytic reduction treatment system 5 includes, for example, at least one treatment unit 6, 7, 8 called a "catalytic bread".
[0028] The catalytic reduction treatment system 5 exhibits a high temperature or emits a high amount of heat when in operation.
[0029] The catalytic reduction treatment system 5 is in particular surrounded by a thermal protection device 10.
[0030] The thermal protection device 10 may include a protective envelope 12, in particular made of aluminium, and a layer 15 made of at least one thermal insulating material, for example glass wool.
[0031] The layer 15 is in particular disposed between the catalytic reduction treatment system 5 and the protective envelope 12.
[0032] The protective envelope 12 may include a first portion 13 and a second portion 14.
[0033] At the location of the first portion 13, a portion of the layer 15 can be disposed between the catalytic reduction treatment system 5 and the protective envelope 12. At the location of the second portion 14, called skin, the protective device can be devoid of a portion of the layer 15.
[0034] The temperature at the location of the second portion 14 is, for example, around 350°C.
[0035] The vehicle 1 may include at least one sensor 20. The at least one sensor 20 is intended to optimize the management by the system 5 of the treatment of the gases produced at the outlet 9 of the internal combustion chamber of the engine 3, before their exit in the form of exhaust gas.
[0036] The sensor 20 is for example located in a position close to a lower part of the protective device 10 surrounding the system 5.
[0037] The terms “lower” and “upper” are defined with reference to a vertical or substantially vertical Z axis, oriented from bottom to top.
[0038] The vehicle 1 may further include a wiring system 21, comprising at least one electrical connection cable 22, in particular a first cable 23 and a second cable 24. The wiring system 21 is in particular intended to connect at least one sensor 20 to a computer.
[0039] The computer is for example located in a position close to an upper part of the protective device 10 surrounding the system 5.
[0040] The vehicle includes in particular at least one sensor 20 intended to be connected by a wiring system 21 to a computer, the at least one sensor 20 and the computer being located at a distance from each other around the protective device 10 surrounding the system 5.
[0041] At least one cable 22, for example the first cable 23, starts in particular from the sensor 20 in the lower part of the motor 3, and is brought back or brought back to the upper part of the motor 3. This makes it possible in particular to facilitate manufacturing steps of a vehicle via visible and accessible means of connection or connectors.
[0042] In order to avoid high amplitude oscillations of at least one cable 22, at least one cable 22 may be attached to the protective enclosure 12.
[0043] A first attachment means 30 for attaching a cable to a housing, in particular to a protective enclosure 12 for a processing system 5, comprises at least one clip 33. The first attachment means 30 is in particular intended to attach at least one cable 22 to the first portion 13 of the protective enclosure 12.
[0044] A second attachment means 40 for attaching a cable to a housing, in particular to a protective enclosure 12 for a processing system 5, comprises at least one clip 45. The second attachment means 40 is in particular intended to attach at least one cable 22 to the second portion 14 of the protective enclosure 12.
[0045] The first attachment means 30 includes for example a plate 31, in particular metallic, the plate 31 forming a support for at least one staple or clip or hook 33 for the first cable 23 and / or at least one staple or clip or hook 34 for the first cable 24.
[0046] The first fastening means 30 is usually fixed by riveting to the casing 12, in particular via a first rivet 36 and / or a second rivet 37. As a result, at least one hole or the formation of at least one opening in the protective casing 12 is required for riveting the first fastening means 30 to the casing 12. This results in the presence of at least one first area without or containing less thermal insulation at the location of the first rivet 36 and / or the second rivet. This at least one first area is devoid of the protective casing 12. Furthermore, at the location of this at least one first area, the layer 15 may have a reduced thickness.
[0047] The second attachment means 40 includes, for example, a plate 41, in particular metallic, the plate 41 forming a support for at least one staple or clip or hook 45 for at least one cable 22, in particular for the first cable 23.
[0048] The second attachment means 40 is usually fixed to the casing 12 by means of a fastening system 43 comprising a nut and a screw or stud. It This results in at least one drilling or the formation of at least one opening in the protective envelope 12 being required for the attachment of the first fastening means 40 to the envelope 12. This results in the presence of at least one second area without or containing less thermal insulation at the location of the fastening system 43. Said at least one second area is without protective envelope 12.
[0049] Fastening systems of the type of the first and second fastening means 30, 40 described above require drilling into the protective device 10. This results in reduced thermal insulation and a risk of cable damage due to heat. Furthermore, such fastening systems are expensive.
[0050] The invention proposes a protective device 51 for an element 81 of a vehicle 100, the device 51 comprising an attachment system 60, in particular for attaching an electrical connection cable 82, the attachment system 60 being integrated, in particular directly integrated, into a protective enclosure 52.
[0051] The fastening system 60 and the protective casing 52 are, in particular, co-integrated as a single mechanical part. As a result, no drilling or opening is required in the protective casing 52 since the fastening system 60 is mechanically linked to the protective casing 52 as a single piece and therefore does not need to be fixed to the protective casing 52.
[0052] The vehicle 100 can be a motor vehicle, for example a motor vehicle with a thermal engine 101, including in particular an internal combustion engine 3.
[0053] An embodiment of a protection device 51 is described below with reference to Figures 3 and 4.
[0054] Said element 81 of a vehicle is for example a catalytic reduction treatment system 5 of an engine 3 of the type described in relation to Figures 1 and 2.
[0055] The protective device 51 is in particular intended to cover or surround at least partially said element 81 of a vehicle.
[0056] The protective device 51 comprises a protective enclosure 52 and an attachment system 60. The attachment system 60 is intended to attach at least one electrical connection cable 82 to the protective device 51. This results in a reduction of the movement amplitudes of an electrical cable 82, particularly when a vehicle 100 is moving.
[0057] The fastening system 60 is mechanically linked to the protective casing 52.
[0058] The fastening system 60 comprises at least one fastening element 61.
[0059] The protective device 51 may further comprise a layer 55 made of at least one thermally insulating material, intended to be disposed between said element 81 of a vehicle 100 and said protective cover 52 and fastening system 60.
[0060] Layer 55 includes, for example, glass wool.
[0061] Advantageously, the fastening system 60 and the envelope 52 can be in the form of a single piece 70.
[0062] The fastening system 60 and the casing 52 can be formed by stamping in the same step.
[0063] The fastening system 60 and the envelope 52 are for example formed from a sheet, in particular sheet metal, for example aluminium.
[0064] For the fastening system 60 and the casing 52, at least one material with high thermal insulation properties may be chosen.
[0065] The fastening system 60 may include several fastening elements 61, in particular three fastening elements 62, 63, 64, for example a first fastening element 62, a second fastening element 63 and a third fastening element 64.
[0066] The three attachment elements 62, 63, 64, in particular the first attachment element 62, the second attachment element 63 and the third attachment element 64, are for example arranged in a non-aligned manner.
[0067] The three attachment elements 62, 63, 64, for example, have an identical or substantially identical shape. The three attachment elements 62, 63, 64, for example, have identical or substantially identical dimensions.
[0068] At least one attachment element 61 may be in the form of a bump or a stud or a puck.
[0069] At least one attachment element 61 may have a conical or frustoconical shape, in particular with concavity oriented towards an element 81 of a vehicle 100, in particular towards a catalytic reduction treatment system 5.
[0070] At least one attachment element 61 may have a form of revolution.
[0071] The at least one attachment element 61 includes in particular a side wall 61a and Optionally, a summit wall 61b. The lateral wall 61a may be conical or frustoconical in shape, particularly of revolution. The summit wall 61b may be flat or substantially flat, particularly circular in shape.
[0072] At least two of the three attachment elements 62, 63, 64, in particular the first attachment element 62 and the third attachment element 64, may be arranged on the same axis A or straight line. The center of the top wall 61b of the first attachment element 62 and the center of the top wall 61b of the third attachment element 64 are, for example, located on line A.
[0073] At least one attachment element, in particular the second attachment element 63 of the three attachment elements 62, 63, 64, may not be aligned with said at least two other attachment elements, in particular the first attachment element 62 and the third attachment element 64 which are aligned on the axis A.
[0074] At least one attachment element, in particular the second attachment element 63, in particular the center of its summit wall 61b, may be located on an axis or straight line B, in particular parallel to the line A. A distance d, or center distance, between the lines (or axes) A and B is for example between 5 mm and 20 mm, depending on the diameter of the cable, in particular of the order of 10 mm.
[0075] Advantageously, the second attachment element 63 can be interposed between the first and third attachment elements 62, 64, in particular along a vertical or substantially vertical direction Z, offset from an axis A passing through the first and third attachment elements 62, 64, in particular through the center of their summit wall 61b.
[0076] The distance dl between the center Cl of the top wall 61b of the first attachment element 62 and the center C2 of the top wall 61b of the second attachment element 63 is for example between 15 mm and 30 mm, depending on the diameter of the wiring, in particular of the order of 20 mm.
[0077] The distance d2 between the center C2 of the top wall 61b of the second attachment element 63 and the center C3 of the top wall 61b of the third attachment element 64 is for example between 15 mm and 30 mm depending on the diameter of the cable, in particular of the order of 20 mm.
[0078] A cable 82, in particular an electrical cable, can be held by a fastening system 60. A cable 82 comprises, for example, a first portion 83, a second portion 84, a third portion 85, a fourth portion 86, and a fifth portion 87. The first portion 83 of the cable 82 extends, for example, from an electrical connector 102, in particular located on the casing 52 covering at least partially an element 81 of a vehicle 100. The electrical connector 102 is in particular located in the lower part of the element 81. The fifth portion 87 of the cable 82 is, for example, intended to be connected to another electrical connector, in particular located in the upper part or above the element 81. The second, third, and fourth portions 84, 85, 86 of the cable 82 extend between the first and fifth portions 82, 87. The second, third, and fourth portions 84, 85, 86 of cable 82 are specifically intended to be held by the attachment system 60.The second, third, and fourth portions 84, 85, 86 of the cable 82 are, for example, positioned at the location of said at least three attachment elements 62, 63, 64, in particular so as to meander between the at least one attachment element 61 of the attachment system 60. The second portion 84 is, for example, disposed at least in part between the third attachment element 64 and the second attachment element 63. The fourth portion 86 is, for example, disposed at least in part between the second attachment element 63 and the first attachment element 62. A cable 82 is, for example, arranged so that a second portion 84 is disposed at least in part to the left of the third element. attachment element 64, that a third portion 85 is disposed at least partly to the right of the second attachment element 63, that a fourth portion 85 is disposed at least partly to the left of the first attachment element 62.
[0079] At least a portion of a cable 82 can advantageously be held or wedged between two successive attachment elements 61 of the attachment system 60.
[0080] An advantage of such a fastening system 60, comprising at least one fastening element 61, in particular at least two fastening elements, preferably at least three fastening elements arranged in a non-aligned manner, lies in an effective or robust retention of an electrical cable 82.
[0081] The outer wall of the casing 52 and the outer wall of the fastening system 60 form, in particular, a continuous surface. The inner wall of the casing 52 and the inner wall of the fastening system 60 form, in particular, a continuous surface.
[0082] By "external wall" or "external face" is meant a surface opposite to that intended to face said element 81 of a vehicle 100, in particular a catalytic reduction treatment system 5 of an engine.
[0083] By "internal wall" or "internal face" is meant a surface intended to face said element 81 of a vehicle 100, in particular a catalytic reduction treatment system 5 of an engine.
[0084] The outer wall of the fastening system 60 includes in particular the outer face of the side wall 61a and the outer face of the top wall 61b of at least one fastening element 61.
[0085] Advantageously, at least one attachment element 61, in particular in the form of a bump, can be filled with at least one thermal insulating material.
[0086] Advantageously, at least one thermal insulating material is in contact with the inner face of at least one attachment element 61, in particular in contact with the inner face of the side wall 61a and the inner face of the top wall 61b.
[0087] Advantageously, the layer 55 made of at least one thermal insulating material is in contact with the face or inner wall of the envelope 52.
[0088] Advantageously, at least one attachment element 61 can be filled with the same at least one thermal insulating material as that of layer 55, for example glass wool.
[0089] According to one variant, at least one attachment element 61 could be filled with at least one thermal insulating material different from the at least one thermal insulating material of layer 55.
[0090] One advantage of a protective device of the type described above lies in its simplicity of manufacture. In particular, a single stamping step can form the fastening system and the casing as a single piece.
[0091] Another advantage of a protective device of the type described above is that it has a reduced manufacturing cost, the fastening system and the casing being in particular in the form of a single piece.
[0092] Another advantage of a protective device of the type described above is that it can be quickly assembled with a vehicle component, particularly a catalytic reduction system for an engine. The protective device advantageously includes an integrated attachment system in the form of a single piece with a protective housing, whereas typically, a cable attachment requires being fixed to a housing by riveting or via a screw / nut fastening system.
[0093] Another advantage of a protection device of the type described above is that it has a reduced assembly cost with a vehicle component, in particular a catalytic reduction treatment system of an engine.
[0094] Another advantage of a protective device of the type described above lies in the fact that the at least one thermal insulating material can have a maximized or optimized thickness at the location of the fastening system, or even a greater thickness at the location of the fastening system compared to other locations of the protective device, the at least one fastening element being able to be filled with the same at least one thermal insulating material as said layer. As a result, such a protective device exhibits maximized thermal insulation properties.
[0095] According to one embodiment, at least one fastening element may be tongue-shaped, in particular mechanically connected at only one of its ends to the casing 52. For example, at least one fastening element may have the shape of a cantilever. In this embodiment, the layer 55 made of at least one thermally insulating material may be flush with the surface of the casing 52 at the location of at least one fastening element.
[0096] Although the invention has been described above in relation to Figures 3 and 4 in the case of a fastening system 60 comprising three fastening elements 61, a number of fastening elements less than or greater than three may be provided. The individual fastening elements 61 may have different shapes and / or dimensions. The fastening elements 61 may be arranged in a different manner than that shown in Figures 3 and 4. An arrangement or disposition of fastening elements 61 may, for example, reproduce at least once and at least partially the pattern shown in Figures 3 and 4 in the case of three fastening elements. In particular, fastening elements 61 may be arranged in a staggered pattern. The axis A and / or the axis B could be oriented in one or more directions different from that of [Fig. 3].
[0097] Figures 5 and 6 illustrate by way of example a fastening system 60 according to an alternative embodiment of the invention, which comprises three fastening elements 62, 63, 64 presented in the form of embossed tabs. Advantageously, an alternation of tabs in opposite directions is implemented, forming a "tunnel" effect which will allow a cable to be held securely.
[0098] Although the invention has been described above in the case of a catalytic reduction treatment system for a heat engine, the invention can of course be applied to any other element which may have a high temperature and which requires to be surrounded by a thermal protection device or heat shield or heat screen.
[0099] Although the invention has been described above in the case of a vehicle with a thermal engine, the invention can of course be applied to a vehicle of another type of engine, for example to a hybrid or electric vehicle.
[0100] Although the invention has been described above in the case of a motor vehicle, the invention can of course be applied to any type of vehicle, in particular in the fields of land, sea and aeronautical vehicles.
Claims
Demands
1. Protective device (51) for a component (81) of a vehicle (100), in particular intended to cover at least partially a component (81) of a vehicle (100), in particular a catalytic reduction treatment system (5) of an engine (3), the device being characterized in that it comprises a protective cover (52) and an attachment system (60) for an electrical connection cable (82), the attachment system (60) being mechanically linked to the protective cover (52), the attachment system (60) comprising at least one attachment element (61), and in that it comprises a layer (55) of at least one thermal insulating material, intended to be disposed between said component (81) of a vehicle and said cover (52) and the attachment system (60), and in that the attachment system (60) and the protective cover (52) are in the form of a single piece (70).
2. Device according to claim 1, characterized in that the layer (55) in at least one thermal insulating material comprises glass wool.
3. Device according to claim 1 or 2, characterized in that said single part (70) is formed by stamping in a single step, for example from a sheet, in particular sheet metal, for example aluminium.
4. Device according to any one of the preceding claims, characterized in that the fastening system (60) comprises several fastening elements (61), in particular three fastening elements (62, 63, 64) arranged in a non-aligned manner.
5. Device according to any one of the preceding claims, characterized in that at least one attachment element (61) is in the form of a bump or stud or lug, the outer wall of the casing (52) and the outer wall of the attachment system (60) forming in particular a continuous surface.
6. Device according to claim 5, characterized in that at least one attachment element (61) is filled with at least one thermal insulating material.
7. Device according to any one of claims 1 to 4, characterized in that at least one attachment element is in the form of a tab, in particular mechanically linked at one of its ends to the casing (52).
8. Device according to claim 7, characterized in that the layer (55) of at least one thermally insulating material is flush with the surface of
9. the casing (52) at the location of at least one attachment element. Power system (101), characterized in that it comprises a heat or internal combustion engine (3), and in that it comprises a protective device (51) according to any one of the preceding claims.
10. Vehicle (100), in particular motor vehicle, comprising a device (51) according to any one of claims 1 to 8 or a motorization system (101) according to claim 9.