Assembly for an internal combustion engine with pump support and heat shield

Abstract

The invention relates to an assembly for a motor vehicle, comprising: - a pump support (17) having fixing interfaces (24.1, 24.2, 24.3) for fixing to a housing of the internal combustion engine and at least one positioning device for positioning the pump support (17) in position relative to the housing of the internal combustion engine, and - a heat shield (37) comprising fixing tabs (38), each fixing tab (38) being equipped with at least one fixing interface (39.1, 39.2) for fixing to the housing of the internal combustion engine, the heat shield (37) further comprising at least one positioning device for positioning the heat shield (37) in position relative to the pump support (17).

Description

Technical Field

[0001] This invention claims priority to French application No. 2101315, filed on February 11, 2021, the contents of which (text, drawings and claims) are incorporated herein by reference.

[0002] This invention relates to an assembly for an internal combustion engine having a pump support and a heat shield. A particularly advantageous, but not limiting, application of this invention exists in thermal or hybrid motor vehicles. Background Technology

[0003] It is known that water pumps are used in motor vehicles to allow water-based liquids to circulate within the cooling circuit.

[0004] Unlike standard pumps driven by the engine's attached facade, electrically powered water pumps can be installed more freely in the engine environment.

[0005] Due to the configuration of the coolant hoses, the configuration of the transmission, and the size constraints of the components located under the vehicle's hood, it may be necessary to mount the pump to the housing of the internal combustion engine and near the exhaust pipe.

[0006] Therefore, a pump-pump support assembly is required, which is compatible with the vibration and thermal constraints of the engine environment in which the assembly is installed. Summary of the Invention

[0007] The present invention aims to effectively meet the above-mentioned needs by providing a component for a motor vehicle, the component comprising:

[0008] - An internal combustion engine, the internal combustion engine including a housing.

[0009] - Pump,

[0010] - Pump support member, which carries the pump.

[0011] The pump support includes a fixing joint for securing it to the housing of the internal combustion engine and at least one positioning device for positioning the pump support relative to the housing of the internal combustion engine.

[0012] - A heat shield, the heat shield including fixed tabs, each fixed tab being provided with at least one fixed engagement for fixing to the housing of the internal combustion engine, the heat shield also including at least one positioning device for positioning the heat shield relative to the pump support.

[0013] This invention allows the pump to be arranged in a compact installation area while protecting it from heat radiation emitted from the exhaust pipe. The invention also helps improve the vehicle's acoustic performance by filtering vibrations from the internal combustion engine toward the pump. Assembly of the components is also facilitated by the presence of positioning devices for positioning the different components. The invention is also adaptable to a variety of pumps that can be fixed to the housing of the internal combustion engine.

[0014] According to an embodiment of the invention, the pump is fitted tightly inside an annular buffer element, the buffer element being equipped with a base fixed to the pump support.

[0015] According to an embodiment of the present invention, at least one fixed joint of the pump support and the fixed joint of the heat shield cooperate with a common fixing member, which ensures the fixation of the "pump support-heat shield" assembly to the housing of the internal combustion engine.

[0016] According to an embodiment of the invention, the pump support is advantageously made of a metallic material, particularly steel.

[0017] According to an embodiment of the present invention, the positioning device for positioning the pump support includes a protruding pin, which is used to engage with a corresponding hollow portion disposed in the housing of the internal combustion engine.

[0018] According to an embodiment of the present invention, the fixed joint of the pump support is located in two different planes.

[0019] According to an embodiment of the present invention, the heat insulation screen includes a body having a partially cylindrical wall and end transverse walls.

[0020] According to an embodiment of the present invention, the hollow protrusion is integrally formed with the partially cylindrical wall.

[0021] According to an embodiment of the present invention, the positioning device for positioning the heat insulation screen includes a hole implemented in a fixing protrusion and for engaging with a corresponding protrusion provided in the pump support.

[0022] According to an embodiment of the present invention, the positioning device for positioning the heat insulation screen includes a hook portion disposed in the edge of the fixed protrusion, the hook portion being used to engage with the edge of the pump support member. Attached Figure Description

[0023] The invention will be better understood by reading the following detailed description and accompanying drawings. These drawings are shown in an illustrative and not limiting manner only.

[0024] - Figure 1It is a perspective view of an internal combustion engine, which has an area in which a water pump is installed;

[0025] - Figure 2 This is a perspective view of the "pump-pump support-heat insulation" assembly, which is used to fix the internal combustion engine housing.

[0026] - Figure 3a and Figure 3b This is a perspective view showing the "pump-pump support" assembly positioned on the housing of the internal combustion engine.

[0027] - Figure 4 This is a detailed perspective view of a protruding pin connected to a fixed joint of the pump support, the protruding pin being used to position the pump support relative to the housing of the internal combustion engine.

[0028] - Figure 5a and Figure 5b This is a perspective view showing the placement and fixation of the heat shield on the housing of the internal combustion engine;

[0029] - Figure 6 This is a detailed perspective view of the positioning hook portion used to position the heat insulation screen relative to the pump support. Detailed Implementation

[0030] From one figure to another, the same, similar or identical elements retain the same figure reference numerals.

[0031] Figure 1 An internal combustion engine 10 of a motor vehicle is shown, which includes, in particular, a housing 11 and a pulley 12 mounted on a crankshaft. The internal combustion engine 10 is connected to a transmission 13. Figure 2 The pump 15 shown above (especially an electric type water pump (which therefore does not need to be connected to the pulley 12 of the crankshaft to drive the pulley)) is used to be installed in area 16, which is located below the starter 18 and near a portion of the exhaust line (not shown).

[0032] like Figure 2 As can be seen above, pump 15 is supported by pump support 17, which is used to fix it to the housing 11 of internal combustion engine 10 and in the mounting area 16. Pump 15 includes a water inlet 22 and a water outlet 23.

[0033] More precisely, the pump 15 is tightly fitted inside an annular buffer element 19, which is equipped with a base 20 fixed to the pump support 17. For this purpose, the base 20 includes a post 21 inserted into a throat groove within the pump 15 support and held in place by means of a spring-type elastic member. In variations, the base 20 may be screwed, riveted, or glued to the pump support 17. Advantageously, the buffer element 19 is made of an elastic material (e.g., an elastomeric material or a rubber material).

[0034] The pump support 17 includes fixing joints 24.1, 24.2, and 24.3 for fixing to the housing 11 of the internal combustion engine 10, and at least one positioning device 26 for positioning the pump support 17 relative to the housing 11 of the internal combustion engine 10. In this case, as in... Figure 3a and Figure 3b As can be clearly seen above, the pump support 17 includes three fixed joints 24.1, 24.2, and 24.3, but the pump support may include a different number of fixed joints to adapt to other environments of the internal combustion engine 10.

[0035] The retaining joints 24.1, 24.2, and 24.3 include openings into which retaining members (e.g., studs or screws) are inserted. In the illustrated embodiment, retaining joint 24.1 includes an opening for a stud 27 (which is integrally formed with the housing 11 of the internal combustion engine 10) to pass through. A nut 28 is used to engage with the stud 27. Each of retaining joints 24.2 and 24.3 includes an opening for a corresponding screw 30 to pass through (see [link to relevant documentation]). Figure 5b As described in more detail below, screw 30 is also used to mate with the fixing joint of heat shield 37.

[0036] The fixed joints 24.1, 24.2, and 24.3 may be located on two different planes that are parallel to each other. Thus, fixed joints 24.1 and 24.2 may be located in the same plane, while fixed joint 24.3 may be located in different planes.

[0037] like Figure 4 As can be seen above, the positioning device 26 for positioning the pump support 17 includes a protruding pin 32 located near the fixed joints 24.2 and / or 24.3. This protruding pin 32 is used to engage with a corresponding hollow portion 33 disposed in the housing 11 of the internal combustion engine 10. The protruding pin 32 is composed of a (particularly cylindrical) protrusion extending from the pump support 17.

[0038] like Figure 2 As shown above, the pump support 17 is advantageously constructed from a sheet formed by stamping. The pump support 17 is made of a metallic material, particularly steel.

[0039] The pump support 17 comprises three parts 17.1, 17.2, and 17.3, which extend along three different planes: two parts 17.1 and 17.3 include fixed joints 24.1, 24.2, and 24.3, respectively, and the base 20 of the buffer element 19 is fixed on the middle part 17.2. These three parts 17.1-17.3 are connected to each other by connecting parts 17.4 and 17.5 (which are formed by stamping).

[0040] The thickness of the pump support 17 is preferably about 3 mm. "About" is understood to mean a variation of plus or minus 10% relative to the indicated value.

[0041] This configuration of the pump support 17 can effectively filter the vibration of the internal combustion engine 10 up to frequencies greater than the first critical mode frequency of the internal combustion engine 10 (around 200 Hz), especially up to about 300 Hz.

[0042] Additionally, the heat shield 37 includes fixing tabs 38, each of which is equipped with at least one fixing engagement 39.1, 39.2 for fixing to the housing 11 of the internal combustion engine 10, and at least one positioning device 40 for positioning the heat shield 37 relative to the pump support 17. The heat shield 37 is used to extend between the pump 15 and a portion of the exhaust line.

[0043] The fixed joints 39.1 and 39.2 include openings into which a fixing member (e.g., a screw) is inserted.

[0044] Advantageously, the fixing joints 24.2 and 24.3 of the pump support 17 and the fixing joints 39.1 and 39.2 of the heat shield 37 are engaged by a common fixing screw 30, which ensures the assembly is fixed to the housing 11 of the internal combustion engine 10. Thus, the same fixing screw 30 is inserted into the channel holes of the fixing joints 24.2 and 24.3 of the pump support 17 and the fixing joints 39.1 and 39.2 of the fixing tabs 38 of the heat shield 37, and these channel holes overlap. This facilitates the fixing of the "pump support 17-heat shield 37" assembly.

[0045] like Figure 5a and Figure 5b As shown above, the positioning device 40 includes a hole 42, which is provided in a fixing protrusion 38 for engaging with a corresponding protrusion 43 provided in the pump support 17. Furthermore, as... Figure 6 As can be clearly seen above, the hook portion 45 provided in the edge of the protrusion is used to engage with the edge of the pump support 17.

[0046] More precisely, the heat insulation screen 37 includes a main body 47, which is integrally connected with two fixing tabs 38, such as... Figure 2 As shown above, the main body 47 has a partially cylindrical wall 48 and an end transverse wall 49. The end transverse wall 49 extends perpendicularly to the axis of the partially cylindrical wall 48.

[0047] The hollow protruding portion 50 is integrally formed with the partially cylindrical portion 48. This portion 50 extends radially relative to the axis of the wall 48. This configuration allows for adaptation to different types of pumps 15 (especially cryogenic or high-temperature pumps with different configurations). This avoids any interference between the heat shield 37 and different types of pumps 15 with different fixing joints.

[0048] Preferably, the heat shield 37 is made of a metal plate, especially steel, which is particularly well adapted to the heat radiation emitted from the exhaust pipe of the internal combustion engine 10.

[0049] The following describes the assembly steps of the "pump 15-pump support 17-heat shield 37" assembly on the housing 11 of the internal combustion engine 10.

[0050] First, the pump 15 is integrated with the pump support 17 by being tightly fitted inside the buffer element 19.

[0051] Then, the pump support 17 is placed into the installation area 16. For this purpose, as follows: Figure 3a As shown above, the pump support 17 is positioned such that the stud 27 passes through the opening of the fixed joint 24.1, and the protrusion 32 of the pump support 17 mates with the corresponding hollow portion of the engine housing 11. The operator can then tighten the nut 28 onto the threaded stud 27, as shown above. Figure 3b As shown above.

[0052] like Figure 5a As can be seen above, the heat insulation screen 37 is then positioned such that the hook portion 45 provided in the edge of the fixing protrusion 38 mates with the edge of the pump support 17. Furthermore, the positioning hole 42 mates with the corresponding protrusion 43 provided in the pump support 17. This ensures the correct positioning of the heat insulation screen 37 relative to the support.

[0053] like Figure 5b As shown above, this allows the two screws 30 to be tightened to secure the assembly formed by the heat shield 37 and the pump support 17 to the housing 11 of the internal combustion engine 10. The screws 30 are inserted into the opening 39.1 (or 39.2, respectively) of the retaining tab 38 of the heat shield 37, which coincides with the corresponding opening 24.2 (or 24.3, respectively) of the pump support 17 and the corresponding tapped opening of the housing 11 of the internal combustion engine 10. The tab 38 of the heat shield 37 and a portion of the pump support 17 are thus held fastened between the head of the screw 30 and the housing 11 of the internal combustion engine 10.

[0054] All steps of the assembly method can be performed by an operator or automatically by a robot.

Claims

1. A component for a motor vehicle, the component comprising: - Internal combustion engine (10), the internal combustion engine including housing (11). - Pump (15), - Pump support (17), which carries the pump (15). The pump support (17) is characterized in that it includes a fixing joint (24.1, 24.2, 24.3) for fixing to the housing (11) of the internal combustion engine (10) and at least one positioning device (26) for positioning the pump support (17) relative to the housing (11) of the internal combustion engine (10), and - A heat shield (37) includes fixing tabs (38), each fixing tab (38) being provided with at least one fixing engagement (39.1, 39.2) for fixing to the housing (11) of the internal combustion engine (10), and the heat shield (37) further includes at least one positioning device (40) for positioning the heat shield (37) relative to the pump support (17). The pump (15) is tightly fitted inside an annular buffer element (19), which is equipped with a base (20) fixed to the pump support (17).

2. The component according to claim 1, characterized in that, At least one fixed joint (24.2, 24.3) of the pump support (17) and the fixed joint (39.1, 39.2) of the heat shield (37) cooperate with a common fixing member (30) that ensures the fixation of the "pump support (17)-heat shield (37)" assembly to the housing (11) of the internal combustion engine (10).

3. The component according to claim 1 or 2, characterized in that, The pump support (17) is made of metal.

4. The component according to claim 3, wherein, The pump support (17) is made of steel.

5. The component according to any one of claims 1, 2, and 4, characterized in that, The positioning device (26) for positioning the pump support (17) includes a protruding pin (32) for engaging with a corresponding hollow part (33) disposed in the housing (11) of the internal combustion engine (10).

6. The component according to any one of claims 1, 2, and 4, characterized in that, The fixed joints (24.1, 24.2, 24.3) of the pump support (17) are located in two different planes.

7. The component according to any one of claims 1, 2, and 4, characterized in that, The heat insulation screen (37) includes a main body (47) having a partially cylindrical wall (48) and an end transverse wall (49).

8. The component according to claim 7, characterized in that, The hollow protrusion (50) is integrally formed with the partially cylindrical wall (48).

9. The component according to any one of claims 1, 2, 4 and 8, characterized in that, The positioning device (40) for positioning the heat insulation screen (37) includes a hole (42) which is implemented in a fixing tab (38) and is used to engage with a corresponding protrusion (43) provided in the pump support (17).

10. The component according to any one of claims 1, 2, 4 and 8, characterized in that, The positioning device (40) for positioning the heat insulation screen (37) includes a hook (45) disposed in the edge of the fixing protrusion (38), the hook (45) being used to engage with the edge of the pump support (17).

Images