Sound shield mounting structure, sound shield assembly, automobile, and sound shield mounting method

Abstract

The application provides a sound insulation cover mounting structure, a sound insulation assembly, an automobile and a sound insulation cover assembly method. The sound insulation cover mounting structure comprises an oil gauge, an ignition coil, an EGR pipe, an engine, an air filter and a sound insulation assembly. The engine has an oil cover. The oil gauge, the ignition coil and the EGR pipe are arranged on the engine. The air filter is connected to the top of the engine. The sound insulation assembly is arranged between the air filter and the engine. The sound insulation assembly comprises a first sound insulation piece and a second sound insulation piece. The first sound insulation piece and the second sound insulation piece are in a split structure and are connected to each other to avoid the oil gauge, the ignition coil, the EGR pipe, the oil cover and the connection area of the air filter and the engine. The sound insulation cover mounting structure is convenient to install and has good noise reduction effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a sound insulation cover mounting structure, a sound insulation assembly, an automobile and a sound insulation cover assembly method. BACKGROUND

[0002] With the continuous progress and development of automobile technology, people's requirements for the comfort of automobile driving are getting higher and higher, among which, NVH (Noise, Vibration and Harshness) is an important indicator for people to evaluate automobiles. As the main noise source during automobile driving, the noise level of the engine is an important item in the evaluation of automobile NVH. When the engine is running, the combustion of the mixture in the combustion chamber will produce a large amount of noise, and the combustion noise will be transmitted to the air through the top of the cylinder head and the cylinder head cover. At the same time, when the valve train arranged on the top of the engine reciprocates, the relative motion and impact between the camshaft and the valve tappet, the valve and the valve seat will produce mechanical noise, which will also be transmitted to the air through the top of the cylinder head cover. Combustion noise and mechanical noise of valve train are the main noise sources on the top of the engine. Due to the requirement of engine lightweight, more and more engines use plastic material cylinder head cover, which has poor rigidity and large surface area. Combustion noise and mechanical noise are transmitted to the surface of the cylinder head cover in the form of structural vibration, and easily excite the vibration of air particles to form sound waves radiating to the top of the engine. The cylinder head cover has poor rigidity and low natural frequency, and is prone to resonance under certain operating conditions of the engine, resulting in aerodynamic noise. Therefore, the top noise problem of the engine has become the focus and difficulty of improving the NVH performance of the engine.

[0003] However, for the arrangement form of the top air filter in the vehicle engine compartment, due to the limitation of the structure, the conventional noise reduction measures are difficult to achieve. SUMMARY

[0004] Therefore, the main purpose of the embodiments of the present application is to provide a sound insulation cover mounting structure, a sound insulation assembly, an automobile and a sound insulation cover assembly method which are convenient to install and have good noise reduction effect.

[0005] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0006] The first aspect of the embodiments of the present application provides a sound insulation cover mounting structure, comprising:

[0007] an oil gauge;

[0008] an ignition coil;

[0009] an EGR pipe;

[0010] an engine with an oil cover, wherein the oil gauge, the ignition coil and the EGR pipe are arranged on the engine;

[0011] An air filter connected to the top of the engine;

[0012] A sound insulation assembly arranged between the air filter and the engine, the sound insulation assembly comprising a first sound insulation member and a second sound insulation member, the first sound insulation member and the second sound insulation member being in a split structure and connected to each other to avoid the oil level gauge, the ignition coil, the EGR pipe, the oil cover and the connecting area between the air filter and the engine.

[0013] In one embodiment, the second sound insulation member has an avoiding area avoiding the oil level gauge, the ignition coil, the EGR pipe, the oil cover and the connecting area, and the first sound insulation member is arranged at least on the avoiding area.

[0014] In one embodiment, the first sound insulation member is arranged on the side of the second sound insulation member away from the engine, and a part of the first sound insulation member is recessed in a direction away from the engine to form an ignition coil avoiding groove, the second sound insulation member has an ignition coil avoiding opening in communication with the ignition coil avoiding groove, and a part of the ignition coil is arranged in the ignition coil avoiding groove and the ignition coil avoiding opening avoids the ignition coil.

[0015] In one embodiment, a part of the second sound insulation member is protruded in a direction away from the engine to form an air filter mounting area on the side of the avoiding area, and the air filter mounting area has a positioning protrusion extending in a top-bottom direction on the outer side wall on the side of the avoiding area, and the edge of the first sound insulation member has a positioning gap matching the shape of the positioning protrusion, and the positioning protrusion is arranged in the positioning gap.

[0016] In one embodiment, the first sound insulation member comprises a heat dissipation channel in communication with the ignition coil avoiding groove, and one end of the heat dissipation channel extends to the air inlet side of the engine.

[0017] In one embodiment, the heat dissipation channel is open on the side close to the second sound insulation member, and the second sound insulation member has a heat dissipation opening arranged at the open end of the heat dissipation channel.

[0018] In one embodiment, the first sound insulation member has a first pipe avoiding hole, and the second sound insulation member has a second pipe avoiding hole in communication with the first pipe avoiding hole, and the EGR pipe is arranged in the first pipe avoiding hole and the second pipe avoiding hole.

[0019] In one embodiment, the first sound insulation member has a pipe avoiding groove recessed in a direction close to the engine, the first pipe avoiding hole is arranged on the bottom wall of the pipe avoiding groove, one end of the pipe avoiding groove extends to the outer side wall of the first sound insulation member, and a part of the EGR pipe is arranged in the pipe avoiding groove.

[0020] In one embodiment, the first sound insulation member has an open slot extending through the first sound insulation member in a top-bottom direction, the open slot being in communication with the first duct avoiding hole and extending to an outer side wall of the first sound insulation member.

[0021] In one embodiment, the first sound insulation member has an oil dipstick avoiding hole, the second sound insulation member has an oil dipstick avoiding opening, the oil dipstick avoiding hole is in communication with the oil dipstick avoiding opening, and the oil dipstick is arranged in the oil dipstick avoiding hole and the oil dipstick avoiding opening.

[0022] In one embodiment, the second sound insulation member has an oil cover avoiding hole, and the oil cover at least partially extends into the oil cover avoiding hole.

[0023] In one embodiment, a part of the outer side wall of the oil cover avoiding hole is protruded to form a positioning surface, and the first sound insulation member has a positioning opening abutting against the positioning surface.

[0024] In one embodiment, a part of the air filter is protruded to form a connecting portion, the first sound insulation member has a first air filter avoiding hole, the second sound insulation member has a second air filter avoiding hole in communication with the first air filter avoiding hole, the connecting portion is arranged in the first air filter avoiding hole and the second air filter avoiding hole and connected with the top of the engine.

[0025] In one embodiment, the engine comprises a wire harness extending along the length direction of the engine and arranged close to the oil dipstick, and a part of the wire harness close to the oil dipstick is located at the bottom of the sound insulation assembly.

[0026] In one embodiment, a part of the first sound insulation member close to the oil dipstick is recessed towards a side close to the air filter to form a wire harness avoiding slot, and a part of the wire harness is located in the wire harness avoiding slot.

[0027] The second aspect of the embodiments of the present application provides a sound insulation assembly, which is the sound insulation assembly of the sound insulation cover installation structure described above.

[0028] In one embodiment, the first sound insulation member comprises a first sound absorption module and a sound insulation module located outside the first sound absorption module, the second sound insulation member comprises a second sound absorption module, and the first sound insulation member is located on a side of the second sound insulation member away from the engine.

[0029] In one embodiment, the first sound absorption module and the sound insulation module are bonded.

[0030] In one embodiment, the sound insulation module comprises an asphalt molecular substrate and sound absorption particles arranged in the asphalt molecular substrate; and / or,

[0031] The first sound-absorbing module and / or the second sound-absorbing module has a plurality of sound-absorbing holes that are interconnected and communicate with the outside world; and / or,

[0032] The material density of the first sound-absorbing module is less than the material density of the second sound-absorbing module.

[0033] In an implementation, part of the second sound-absorbing module is recessed towards a side away from the engine to form a plurality of sound-absorbing gaps arranged at intervals, and the width dimension of the sound-absorbing gaps gradually decreases in the direction away from the engine.

[0034] The third aspect of the embodiments of the present application provides an automobile comprising the sound shield mounting structure.

[0035] The fourth aspect of the embodiments of the present application provides a sound shield assembly method for the sound shield mounting structure, and the sound shield assembly method comprises the following steps:

[0036] The second sound-insulating part is installed on the engine;

[0037] The ignition coil and the EGR pipe are installed on the engine;

[0038] The first sound-insulating part is installed on the second sound-insulating part;

[0039] The oil gauge and the air filter are installed on the engine.

[0040] The embodiments of the present application provide a sound shield mounting structure, a sound-insulating assembly, an automobile and a sound shield assembly method. By installing the sound-insulating assembly between the air filter and the engine, the propagation of noise can be reduced from the transmission path, and the engine top noise is effectively reduced. The first sound-insulating part and the second sound-insulating part are both split structures, which can facilitate the installation of the sound-insulating assembly between the air filter and the engine. The sound-insulating assembly can be adaptively arranged according to the arrangement of the engine top and the surrounding components to avoid the oil gauge, the ignition coil, the EGR pipe, the oil cover and the connection area of the air filter and the engine. Thus, the overall structure of the sound shield mounting structure can be compact, which can meet the installation requirements of the automobile cabin total height, avoid interference between structures, and facilitate the step-by-step installation of the sound-insulating assembly between the air filter and the engine by using the split structure, thereby reducing the assembly difficulty of the sound shield mounting structure, and effectively improving the installation efficiency while having a good noise reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 FIG. 1 is a structural schematic diagram of a sound shield mounting structure according to an embodiment of the present application;

[0042] Figure 2 FIG. 1 is a structural schematic diagram of a sound shield mounting structure according to an embodiment of the present application;Figure 1 Structure diagram of the sound insulation assembly;

[0043] Figure 3 For Figure 2 Structure diagram of the first sound insulation member;

[0044] Figure 4 For Figure 2 Structure diagram of the bottom of the second sound insulation member;

[0045] Figure 5 For Figure 2 Structure diagram of the cooperation between the positioning surface and the positioning opening, and the positioning notch and the positioning protrusion;

[0046] Figure 6 For Figure 1 Structure diagram of the cooperation between the sound insulation assembly and the parts;

[0047] Figure 7 For Figure 1 Structure diagram of the cooperation between the engine and the sound insulation assembly;

[0048] Figure 8 For Figure 7 Local enlarged view of A in the structure diagram;

[0049] Figure 9 For Figure 8 Local enlarged view of B in the structure diagram from another perspective, in which the first sound insulation member only shows part of the structure;

[0050] Figure 10 For Figure 2 Structure diagram of the cooperation between the sound insulation assembly and the ignition coil;

[0051] Figure 11 Structure diagram of the cooperation between the first sound absorption module, the sound insulation module, and the second sound absorption module in another embodiment of the application;

[0052] Figure 12 For Figure 11 Local enlarged view of C in the structure diagram;

[0053] Figure 13 Flowchart of the assembly method of the sound insulation cover in still another embodiment of the application.

[0054] Explanation of reference signs

[0055] Oil dipstick 10; ignition coil 20; EGR pipe 30; engine 40; oil cover 41; wire harness 42; air filter 50; connecting part 51; sound insulation assembly 60; first sound insulation part 61; ignition coil avoiding slot 61a; positioning notch 61b; heat dissipation channel 61c; first pipe avoiding hole 61d; pipe avoiding slot 61e; open slot 61f; oil dipstick avoiding hole 61g; positioning opening 61h; first air filter avoiding hole 61i; wire harness avoiding slot 61j; first sound absorption module 611; sound insulation module 612; second sound insulation part 62; avoiding area 62a; ignition coil avoiding opening 62b; air filter mounting area 62c; positioning protrusion 62c'; heat dissipation opening 62d; second pipe avoiding hole 62e; oil dipstick avoiding opening 62f; oil cover avoiding hole 62g; positioning surface 62g'; second air filter avoiding hole 62h; second sound absorption module 621; sound absorption seam 621a; width size R. DETAILED DESCRIPTION

[0056] In the present application, the "top", "bottom", "length direction" orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. Figure 1 The "inner", "outer" orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. Figure 11 It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0057] An embodiment of the present application provides a sound insulation cover mounting structure, please refer to Figures 1 to 6 , including oil dipstick 10, ignition coil 20, EGR pipe 30 (Exhaust Gas Recirculation, exhaust gas recirculation pipe), engine 40, air filter 50 and sound insulation assembly 60, engine 40 has oil cover 41, oil dipstick 10, ignition coil 20 and EGR pipe 30 are arranged on engine 40. The air filter 50 is connected with the top of the engine 40, and the sound insulation assembly 60 is arranged between the air filter 50 and the engine 40. The sound insulation assembly 60 comprises a first sound insulation part 61 and a second sound insulation part 62, and the first sound insulation part 61 and the second sound insulation part 62 are in a split structure and are connected with each other to avoid the connection area of the oil dipstick 10, the ignition coil 20, the EGR pipe 30, the oil cover 41 and the air filter 50 and the engine 40.

[0058] Another embodiment of the present application provides a sound insulation assembly 60, which is the sound insulation assembly 60 of the sound insulation cover mounting structure described in the embodiments of the present application.

[0059] Still another embodiment of the present application provides a car, please refer to Figure 13 , comprising the sound insulation cover mounting structure described in the embodiments of the present application.

[0060] A further embodiment of the present application provides a soundproof cover assembly method for the soundproof cover mounting structure described in the embodiments of the present application, and the soundproof cover assembly method comprises the following steps:

[0061] Step S1: mounting the second soundproof member 62 on the engine 40.

[0062] Step S2: mounting the ignition coil 20 and the EGR pipe 30 on the engine 40.

[0063] Step S3: mounting the first soundproof member 61 on the second soundproof member 62.

[0064] Step S4: mounting the oil dipstick 10 and the air filter 50 on the engine 40. The split structure refers to the first soundproof member 61 and the second soundproof member 62 being two separate structures, and the first soundproof member 61 and the second soundproof member 62 are combined by assembly, and the soundproof assembly 60 is not a one-piece structure.

[0065] For the structure of the air filter 50 being arranged on top, the structure between the air filter 50 and the engine 40 is relatively complex, and the assembly of the soundproof assembly 60 is difficult. Therefore, when assembling the soundproof cover mounting structure, the second soundproof member 62 can be mounted on the engine 40 before the ignition coil 20 and the EGR pipe 30 are mounted, so that after the ignition coil 20 and the EGR pipe 30 are mounted, only the first soundproof member 61 in the soundproof assembly 60 needs to be mounted. That is, the first soundproof member 61 and the second soundproof member 62 can be installed on the engine 40 in steps, without the need to assemble the first soundproof member 61 and the second soundproof member 62 into the soundproof assembly 60 and then mount them on the engine 40, thereby reducing the assembly difficulty of the soundproof assembly 60.

[0066] It should be noted that the connection mode between the first soundproof member 61 and the second soundproof member 62 after the assembly of the soundproof cover mounting structure is completed is not limited, for example, a detachable connection mode can be adopted, or a non-detachable connection mode can be adopted.

[0067] In the related art, for the arrangement form of the air filter 50 arranged on top in the vehicle engine compartment, when the vehicle intake system is arranged and designed, the air filter 50 is arranged on the top of the engine 40 in the front-rear direction, which facilitates the close proximity of the intercooler inlet to the throttle valve, shortens the intake distance, and thus reduces the intake pressure loss. Moreover, the air filter 50 being arranged at a high position in the engine compartment is also conducive to reducing the intake temperature, improving the performance of the engine 40, facilitating the drainage and installation of the intake system, and thus is widely applied in compact engine compartments. However, due to the limitation of the overall height of the vehicle engine compartment, the gap between the bottom of the air filter 50 and the top of the engine 40 is small, the boundary environment is complex, and the overall noise reduction effect is poor.

[0068] The application is provided with a sound insulation assembly 60 between the air filter 50 and the engine 40. By installing the sound insulation assembly 60 between the air filter 50 and the engine 40, the transmission path of the noise can be reduced, and the noise on the top of the engine 40 can be effectively reduced. The first sound insulation part 61 and the second sound insulation part 62 are both split structures, which can facilitate the installation of the sound insulation assembly 60 between the air filter 50 and the engine 40. The sound insulation assembly 60 can be adaptively arranged according to the arrangement of the components on the top and around the engine 40, so as to avoid the oil gauge 10, the ignition coil 20, the EGR pipe 30, the oil cover 41, and the connection area between the air filter 50 and the engine 40. Thus, the overall structure of the sound cover installation structure can be compact, the interference between structures can be avoided while meeting the installation requirements of the total height of the automobile cabin, and the split structure can facilitate the step-by-step installation of the sound insulation assembly 60 between the air filter 50 and the engine 40, so as to reduce the assembly difficulty of the sound cover installation structure, thereby effectively improving the installation efficiency while having a good noise reduction effect.

[0069] It should be noted that, in addition to avoiding the above-mentioned components, the first sound insulation part 61 and the second sound insulation part 62 can also avoid other components between the engine 40 and the air filter 50. For example, the sound cover installation structure further includes a phase sensor, and the second sound insulation part 62 has a sensor avoiding hole for avoiding the phase sensor. For another example, the sound cover installation structure further includes a high load path pipe and a low load path pipe, and the second sound insulation part 62 has a high load path avoiding hole and a low load path avoiding hole for avoiding the high load path pipe and the low load path pipe, respectively.

[0070] The way in which the sound insulation assembly 60 avoids other components in the sound cover installation structure can be set according to actual needs, which can be that the sound insulation assembly 60 is formed with structures for avoiding the above-mentioned components, or can be avoided by other means.

[0071] For example, referring to Figure 3 , the second sound insulation part 62 has an avoiding area 62a for avoiding the oil gauge 10, the ignition coil 20, the EGR pipe 30, the oil cover 41, and the connection area between the air filter 50 and the engine 40, and the first sound insulation part 61 is at least covered on the avoiding area 62a.

[0072] Specifically, the second sound insulation part 62 avoids the above-mentioned components through the avoiding area 62a, and the first sound insulation part 61 can be covered on the top side of the avoiding area 62a or the bottom side of the avoiding area 62a, and the covering range can also extend out of the avoiding area 62a. Thus, the structure type of the sound cover installation structure can be diversified to meet actual needs.

[0073] In an embodiment, referring to the body 3, Figure 4 , and Figure 10The first sound insulation member 61 is located on the side of the second sound insulation member 62 away from the engine 40, and a portion of the first sound insulation member 61 is recessed to form an ignition coil avoiding groove 61a away from the engine 40. The second sound insulation member 62 has an ignition coil avoiding opening 62b in communication with the ignition coil avoiding groove 61a. A portion of the ignition coil 20 extends into the ignition coil avoiding groove 61a, and the ignition coil avoiding opening 62b avoids the ignition coil 20.

[0074] Specifically, the first sound insulation member 61 is located on the top side of the second sound insulation member 62, and the first sound insulation member 61 avoids the ignition coil 20 through the ignition coil avoiding groove 61a formed by recessing. The second sound insulation member 62 avoids the ignition coil 20 through the ignition coil avoiding opening 62b. Thus, through the communication of the ignition coil avoiding groove 61a and the ignition coil avoiding opening 62b, the sound insulation assembly 60 avoids the ignition coil 20, so that interference between the sound insulation assembly 60 and the ignition coil 20 can be avoided.

[0075] It can be understood that the first sound insulation member 61 can also be provided with a plurality of ignition coil avoiding grooves 61a, and the second sound insulation member 62 can also be provided with a plurality of ignition coil avoiding openings 62b corresponding to the ignition coil avoiding grooves 61a, so that a plurality of ignition coils 20 on the engine 40 can be avoided.

[0076] In a specific embodiment, the second sound insulation member 62 has a plurality of ignition coil avoiding openings 62b, and each ignition coil avoiding opening 62b is in communication with each other.

[0077] In an embodiment, referring to Figure 4 The first sound insulation member 61 includes a heat dissipation channel 61c in communication with the ignition coil avoiding groove 61a, and one end of the heat dissipation channel 61c extends to the air intake side of the engine 40.

[0078] Specifically, the heat dissipation channel 61c is in communication with the ignition coil avoiding groove 61a, which can prevent the temperature of the top of the ignition coil 20 from rising due to the lack of heat dissipation space on the top of the engine 40 after the sound insulation assembly 60 is installed. When the temperature of the top of the ignition coil 20 exceeds the allowable temperature, it is easy to cause a series of problems such as an increase in the resistance coefficient of the wire of the ignition coil 20, a decrease in the primary current and the secondary voltage transmitted to the spark plug, and insufficient ignition energy of the spark plug. By extending one end of the heat dissipation channel 61c to the air intake side of the engine 40, the heat of the ignition coil 20 can be transferred to the air intake side of the engine 40 through the heat dissipation channel 61c, which can effectively prevent high temperature from damaging the insulation material inside the ignition coil 20 and causing damage to the ignition coil 20 and engine 40 misfire and other problems. Thus, the heat generated by the ignition coil 20 during the driving of the automobile can be dissipated to the outside through the heat dissipation channel 61c, which can solve the problem of difficult heat dissipation of the ignition coil 20 and can be verified through the whole vehicle temperature field test.

[0079] It should be noted that the running direction of the heat dissipation channel 61c can also be determined according to the specific structure of the sound insulation assembly 60.

[0080] It can be understood that when the first sound insulation piece 61 is provided with a plurality of ignition coil avoiding grooves 61a, the first sound insulation piece 61 can also be provided with a plurality of heat dissipation channels 61c corresponding to the ignition coil avoiding grooves 61a in a one-to-one manner.

[0081] The heat dissipation channel 61c can only have two ends respectively communicating with the ignition coil avoiding groove 61a and the port on the intake side of the engine 40, or can also have an opening close to the side of the second sound insulation piece 62.

[0082] For example, referring to Figure 3 and Figure 4 , the heat dissipation channel 61c is open on the side close to the second sound insulation piece 62, and the second sound insulation piece 62 has a heat dissipation port 62d located at the opening of the heat dissipation channel 61c. That is, the heat dissipation channel 61c has a bottom opening, and the heat dissipation port 62d of the second sound insulation piece 62 communicates with the bottom opening of the heat dissipation channel 61c, thereby further enhancing the heat dissipation effect.

[0083] In an embodiment, referring to Figure 3 and Figure 4 , part of the second sound insulation piece 62 protrudes in a direction away from the engine 40 to form an air filter mounting area 62c on the side of the avoiding area 62a, and the outer side wall close to the avoiding area 62a of the air filter mounting area 62c has a positioning protrusion 62c' extending in the top-bottom direction. The edge of the first sound insulation piece 61 has a positioning notch 61b matching the shape of the positioning protrusion 62c', and the positioning protrusion 62c' is located in the positioning notch 61b. Therefore, the second sound insulation piece 62 and the first sound insulation piece 61 can be matched with each other through the positioning protrusion 62c' and the positioning notch 61b, so that the first sound insulation piece 61 can be accurately positioned and mounted on the second sound insulation piece 62.

[0084] Specifically, the air filter mounting area 62c is an area for placing the air filter 50, that is, the air filter 50 is arranged on the top side of the air filter mounting area 62c. The air filter mounting area 62c is formed by the protrusion of part of the second sound insulation piece 62, and the positioning protrusion 62c' of the air filter mounting area 62c protrudes laterally and extends in the top-bottom direction.

[0085] The positioning protrusion 62c' and the positioning notch 61b can be clamped, abutted, or connected in other matching ways.

[0086] The shape matching of the positioning gap 61b and the positioning protrusion 62c' means that the outer shape size of the positioning gap 61b matches the outer shape size of the positioning protrusion 62c', so as to facilitate the positioning protrusion 62c' to be installed in the positioning gap 61b.

[0087] The specific shape of the positioning gap 61b and the positioning protrusion 62c' can be determined according to actual conditions, for example, the positioning gap 61b is an arc-shaped gap, and the positioning protrusion 62c' is a strip-shaped protrusion extending along the top-bottom direction.

[0088] It should be noted that the setting range of the air filter 50 can be only within the range of the top side of the air filter mounting area 62c, or part of the structure can extend out of the range of the top side of the air filter mounting area 62c.

[0089] In an embodiment, referring to Figure 3 and Figure 4 , the first sound insulation piece 61 has a first pipeline avoiding hole 61d, the second sound insulation piece 62 has a second pipeline avoiding hole 62e in communication with the first pipeline avoiding hole 61d, and the EGR pipe 30 is arranged in the first pipeline avoiding hole 61d and the second pipeline avoiding hole 62e.

[0090] Specifically, the first sound insulation piece 61 avoids the EGR pipe 30 through the first pipeline avoiding hole 61d, the second sound insulation piece 62 avoids the EGR pipe 30 through the second pipeline avoiding hole 62e, and the first pipeline avoiding hole 61d and the second pipeline avoiding hole 62e are both through holes and in communication with each other, so as to easily pass the EGR pipe 30 through the sound insulation assembly 60, thereby facilitating the arrangement of the EGR pipe 30 on the engine 40.

[0091] In an embodiment, referring to Figure 2 and Figure 7 , the first sound insulation piece 61 has a pipeline avoiding groove 61e recessed towards the direction close to the engine 40, the first pipeline avoiding hole 61d is arranged on the bottom wall of the pipeline avoiding groove 61e, one end of the pipeline avoiding groove 61e extends to the outer side wall of the first sound insulation piece 61, and part of the EGR pipe 30 is located in the pipeline avoiding groove 61e.

[0092] Specifically, part of the EGR pipe 30 is arranged in the pipeline avoiding groove 61e and extends along the pipeline avoiding groove 61e, and passes through the first sound insulation piece 61 through the first pipeline avoiding hole 61d on the bottom wall of the pipeline avoiding groove 61e. By arranging the pipeline avoiding groove 61e, the height of the EGR pipe 30 relative to the sound insulation assembly 60 can be effectively reduced, the overall structure of the sound cover mounting structure can be more compact, the size of the sound cover mounting structure can be reduced, and the EGR pipe 30 can also be limited to a certain extent.

[0093] It should be noted that the entire region of the partial pipe length of the EGR pipe 30 can be located in the pipe avoiding groove 61e, or part of the region of the partial pipe length can be located in the pipe avoiding groove 61e.

[0094] In an embodiment, referring to Figure 2 and Figure 4 , the first sound insulation member 61 has an opening groove 61f penetrating the first sound insulation member 61 in the top-bottom direction, the opening groove 61f is in communication with the first pipe avoiding hole 61d and extends to the outer side wall of the first sound insulation member 61.

[0095] Specifically, the regions of the first sound insulation member 61 on both sides of the opening groove 61f are disconnected, the opening groove 61f is in communication with the first pipe avoiding hole 61d and the outer side wall of the first sound insulation member 61 respectively, which can enable the aperture of the first pipe avoiding hole 61d to have a certain elastic change, and in the process of passing the EGR pipe 30 through the first pipe avoiding hole 61d, the region of the first sound insulation member 61 at the opening groove 61f can increase the aperture of the first pipe avoiding hole 61d through a certain degree of elastic deformation, which can facilitate the installation of the EGR pipe 30.

[0096] It should be noted that the size of the opening groove 61f can be determined according to the specific size of the first sound insulation member 61, for example, the width of the opening groove 61f is 4mm.

[0097] In an embodiment, referring to Figures 3 to 6 , the first sound insulation member 61 has an oil stick avoiding hole 61g, and the second sound insulation member 62 has an oil stick avoiding opening 62f, the oil stick avoiding hole 61g is in communication with the oil stick avoiding opening 62f, and the oil stick 10 is arranged in the oil stick avoiding hole 61g and the oil stick avoiding opening 62f.

[0098] That is, the first sound insulation member 61 avoids the oil stick 10 through the oil stick avoiding hole 61g, the second sound insulation member 62 avoids the oil stick 10 through the oil stick avoiding opening 62f, and the oil stick avoiding hole 61g and the oil stick avoiding opening 62f are in communication with each other, so that the oil stick 10 can easily pass through the sound insulation assembly 60, thereby facilitating the arrangement of the oil stick 10 on the engine 40 and avoiding the interference between the oil stick 10 and the sound insulation assembly 60.

[0099] It should be noted that the oil stick avoiding hole 61g is a through hole, and the specific shape of the oil stick avoiding opening 62f can be determined according to actual needs, for example, the oil stick avoiding opening 62f is an opening extending towards the air inlet side of the engine 40.

[0100] In an embodiment, referring to Figure 3 and Figure 7 , the second sound insulation member 62 has an oil cover avoiding hole 62g, and the oil cover 41 at least partially extends into the oil cover avoiding hole 62g.

[0101] The oil cover avoiding hole 62g is a through hole, and the second sound insulation part 62 can avoid the oil cover 41 of the engine 40 through the oil cover avoiding hole 62g. In this way, on the one hand, the second sound insulation part 62 can avoid the oil cover 41 to facilitate installation, and on the other hand, the oil cover 41 will not be blocked by the sound insulation assembly 60, and oiling can be facilitated.

[0102] In an embodiment, referring to Figure 3 , Figure 4 and Figure 8 , part of the outer side wall of the oil cover avoiding hole 62g is protruded to form a positioning surface 62g', and the first sound insulation part 61 has a positioning opening 61h abutting against the positioning surface 62g'.

[0103] Specifically, the first sound insulation part 61 and the second sound insulation part 62 can also be positioned through the positioning opening 61h and the positioning surface 62g' of the outer side wall of the oil cover avoiding hole 62g, and the positioning opening 61h abuts against the positioning surface 62g', which can facilitate the installation of the first sound insulation part 61 on the second sound insulation part 62.

[0104] It should be noted that the specific shape of the positioning opening 61h and the positioning surface 62g' can be determined according to actual conditions, for example, the positioning opening 61h is an arc-shaped notch, and the positioning surface 62g' is an arc surface with a size matching the arc-shaped notch.

[0105] In a specific embodiment, referring to Figure 5 , the first sound insulation part 61 and the second sound insulation part 62 are respectively positioned through the positioning opening 61h and the positioning surface 62g', and the positioning protrusion 62c' and the positioning notch 61b, so that the positioning effect is formed in the horizontal and vertical directions, and the assembly and positioning of the first sound insulation part 61 and the second sound insulation part 62 are accurate.

[0106] In an embodiment, referring to Figures 3 to 6 , part of the air filter 50 is protruded to form a connecting part 51, the first sound insulation part 61 has a first air filter avoiding hole 61i, the second sound insulation part 62 has a second air filter avoiding hole 62h communicating with the first air filter avoiding hole 61i, and the connecting part 51 is arranged in the first air filter avoiding hole 61i and the second air filter avoiding hole 62h and connected with the top of the engine 40.

[0107] Specifically, the first air filter avoiding hole 61i and the second air filter avoiding hole 62h are both through holes, which can connect the air filter 50 and the top of the engine 40 to avoid the interference between the sound insulation assembly 60 and the air filter 50, so as to facilitate the installation of the sound insulation assembly 60 between the air filter 50 and the engine 40.

[0108] It should be noted that the connecting part 51 can be a boss or other structure, and the connecting part 51 and the engine 40 can be connected by bolts or other fastening connection modes.

[0109] In an embodiment, between step S2 and step S3, the sound insulation cover assembly method further comprises:

[0110] The high-load path pipeline, the low-load path pipeline, the phase sensor, and the like are fixed to the cylinder head cover of the engine 40, and the main wire harness of the wire harness 42 is installed in the intake manifold fixing slot of the engine 40.

[0111] In a specific embodiment, step S3 specifically comprises: passing the EGR pipe through the first sound insulation member 61 through the first pipeline avoidance hole 61d and the open slot 61f, and installing the first sound insulation member 61 on the second sound insulation member 62.

[0112] In this way, the installation of the first sound insulation member 61 can be realized, and the difficulty of the installation of the sound insulation assembly 60 is reduced

[0113] In a specific embodiment, step S4 specifically comprises: passing the oil gauge 10 through the oil gauge avoidance hole 61g and the oil gauge avoidance opening 62f, so as to install the oil gauge 10 on the engine 40. The air filter 50 is connected with the engine 40 through the first air filter avoidance hole 61i and the second air filter avoidance hole 62h.

[0114] In this way, the oil gauge 10 and the air filter 50 will not affect the installation of the sound insulation assembly 60, and interference between the sound insulation assembly 60 and the oil gauge 10 and the air filter 50 can be avoided. In addition, the problem of assembly difficulty caused by the soft material and easy deformation is avoided, the assembly quality is ensured, and the assembly efficiency is improved.

[0115] In an embodiment, referring to Figure 9 The engine 40 comprises the wire harness 42 arranged along the length direction of the engine 40 and close to the oil gauge 10, and the area of the wire harness 42 close to the oil gauge 10 is located at the bottom of the sound insulation assembly 60.

[0116] Specifically, the wire harness 42 is arranged between the cylinder head cover and the intake manifold of the engine 40 along the length direction of the engine 40, and the gap between the wire harness 42 and the oil gauge 10 is small. By arranging the area of the wire harness 42 close to the oil gauge 10 in the coverage range of the sound insulation assembly 60, when the oil gauge 10 is inserted and pulled out for checking the oil level, the oil remaining on the oil gauge 10 will only drip on the sound insulation assembly 60 due to the shielding of the sound insulation assembly 60, and will not drip on the wire harness 42, so that the conduction of the wire harness 42 can be avoided, and the abnormal operation of the engine 40 can be prevented.

[0117] It should be noted that the wire harness 42 can be shielded only by the first sound insulation member 61, or the wire harness 42 can be shielded by the first sound insulation member 61 and the second sound insulation member 62.

[0118] In some embodiments, referring to Figure 4The first sound insulation member 61 is recessed towards the side close to the air filter 50 in the area close to the oil dipstick 10 to form a wire harness avoiding groove 61j, and part of the wire harness 42 is located in the wire harness avoiding groove 61j.

[0119] That is, the area of the wire harness 42 close to the oil dipstick 10 can be arranged in the wire harness avoiding groove 61j, on the one hand, the wire harness avoiding groove 61j can fix and limit the wire harness 42, which can avoid the wire harness 42 from moving or shifting, and on the other hand, the wire harness 42 can occupy as little internal space of the sound insulation cover mounting structure as possible.

[0120] It should be noted that the entire area of the wire harness 42 in the partial length range can be located in the wire harness avoiding groove 61j, or part of the area in the partial length range can be located in the wire harness avoiding groove 61j.

[0121] In an embodiment, referring to Figure 11 The first sound insulation member 61 includes a first sound absorbing module 611 and a sound insulation module 612 located outside the first sound absorbing module 611, and the second sound insulation member 62 includes a second sound absorbing module 621. The first sound insulation member 61 is located on the side away from the engine 40 of the second sound insulation member 62. That is, the sound insulation assembly 60 is composed of multiple materials, which can greatly improve the sound insulation effect.

[0122] Specifically, the sound insulation module 612 has excellent performance in isolating air sound and impact sound due to its high-density characteristic material. The sound is greatly attenuated inside the sound insulation module 612, which has good wide-band sound insulation performance and high damping performance, especially for middle and low frequency noise. At the same time, the sound insulation module 612 has high strength, which can improve the overall tear strength of the sound insulation assembly 60. Moreover, the surface of the sound insulation module 612 is smooth and bright in color, which has good moisture-proof and flame-retardant properties, avoiding the problem of porous surface when using a single layer of polyurethane foam material, and improving the overall appearance of the structure.

[0123] Through the combination of the first sound absorbing module 611, the sound insulation module 612 and the second sound absorbing module 621, a combined effect of sound absorption and sound insulation can be achieved on the propagation path of the noise at the top of the engine 40, greatly reducing the transmission of the noise radiated from the top surface of the engine 40 to the cabin, and greatly improving the noise reduction quality of the engine 40.

[0124] It should be noted that the overall thickness of the sound insulation assembly 60 can be considered comprehensively according to the gap between the air filter 50 and the engine 40 and the noise reduction effect required. For example, the thickness of the sound insulation assembly 60 is 5±0.5mm, which can reduce the noise radiated from the top surface of the engine 40 by 6dB, and the subjective evaluation in the cabin is excellent.

[0125] In an embodiment, the first sound absorption module 611 has a plurality of sound absorption holes that are interconnected and communicate with the outside.

[0126] Specifically, the first sound absorption module 611 has a plurality of sound absorption holes inside, the sound absorption holes have small hole diameters and are uniformly distributed, are interconnected and penetrate each other inside the material, and are all open to the outside and communicate with the outside, so that sound waves are easily absorbed into the sound absorption holes and are absorbed by the material. Due to the presence of the sound absorption holes, the first sound absorption module 611 has good sound absorption performance.

[0127] It can be understood that, according to needs, the second sound absorption module 621 can also have a plurality of sound absorption holes that are interconnected and communicate with the outside.

[0128] The material types of the first sound absorption module 611, the second sound absorption module 621 and the sound insulation module 612 can be determined according to actual needs.

[0129] For example, the first sound absorption module 611 and the second sound absorption module 621 are injection molded by using open-cell slow-rebound polyurethane foam material, and the slow-rebound material has excellent vibration resistance, damping and sound insulation effects.

[0130] It should be noted that the first sound absorption module 611 and the second sound absorption module 621 can have the same density or different densities. For example, the material density of the first sound absorption module 611 is less than that of the second sound absorption module 621. In this way, the area of the second sound insulation part 62 that is not covered by the first sound insulation part 61 can also ensure good sound insulation effect by increasing the material density, and the density of the first sound absorption module 611 can be appropriately reduced due to the presence of the sound insulation module 612, so as to increase the internal pores and improve the sound absorption effect.

[0131] In a specific embodiment, through sound insulation comparison and verification of the target test sample, the material density of the first sound absorption module 611 is 200 kg / m 3 , the single sound absorption level is ≥2, and the sound insulation performance is ≥20, the material density of the second sound absorption module 621 is 400 kg / m 3 , the single sound absorption level is ≥4, and the sound insulation performance is ≥30, and has good flame retardant and aging resistance.

[0132] In a specific embodiment, the sound insulation module 612 includes an asphalt molecular substrate and sound absorption particles arranged in the asphalt molecular substrate.

[0133] The sound absorption particles are substances that can improve the sound absorption effect, such as heavy mineral powder. The first sound absorption module 611 and the sound insulation module 612 can be connected by bonding or other connection methods.

[0134] Exemplarily, the sound insulation module 612 is a sound insulation damping felt.

[0135] In an embodiment, referring to Figure 12 , a part of the second sound absorption module 621 is recessed towards the side away from the engine 40 to form a plurality of sound absorption slots 621a arranged at intervals, and the width size R of the sound absorption slots 621a gradually decreases towards the side away from the engine 40.

[0136] Specifically, the second sound absorption module 621 has a plurality of sound absorption slots 621a on the side close to the engine 40, i.e. a concave-convex shape of a slit wedge, and by arranging a plurality of sound absorption slots 621a with varying width size R at intervals, the sound absorption frequency characteristics of the second sound insulation piece 62 can be better adjusted, thereby improving the average sound absorption coefficient of the sound insulation assembly 60, so that the sound insulation assembly 60 has better sound insulation and sound absorption performance. In the description of the present application, the description of the terms "in an embodiment", "in some embodiments", "in a specific embodiment", or "exemplarily" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined by those skilled in the art without contradiction.

[0137] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is included within the scope of protection of the present application.

Claims

1. A soundproof cover mounting structure characterized by comprising: The engine comprises: an oil dipstick; an ignition coil; an EGR pipe; an engine with an oil cover, the oil dipstick, the ignition coil and the EGR pipe being arranged on the engine; an air filter connected to the top of the engine; a sound insulation assembly arranged between the air filter and the engine, the sound insulation assembly comprising a first sound insulation member and a second sound insulation member, the first sound insulation member and the second sound insulation member being in split structure and being connected to each other to avoid the oil dipstick, the ignition coil, the EGR pipe, the oil cover and the connection area of the air filter and the engine; the first sound insulation member has a first pipe avoiding hole, the second sound insulation member has a second pipe avoiding hole in communication with the first pipe avoiding hole, and the EGR pipe is arranged in the first pipe avoiding hole and the second pipe avoiding hole; the first sound insulation member has a pipe avoiding groove recessed towards the engine, the first pipe avoiding hole is arranged on the bottom wall of the pipe avoiding groove, one end of the pipe avoiding groove extends to the outer side wall of the first sound insulation member, and part of the EGR pipe is arranged in the pipe avoiding groove and extends along the pipe avoiding groove; the first sound insulation member has an opening groove penetrating the first sound insulation member in the top-bottom direction, the opening groove is in communication with the first pipe avoiding hole and extends to the outer side wall of the first sound insulation member; part of the first sound insulation member is recessed to form an ignition coil avoiding groove away from the engine, the first sound insulation member comprises a heat dissipation channel in communication with the ignition coil avoiding groove, and one end of the heat dissipation channel extends to the air inlet side of the engine; the first sound insulation member and the second sound insulation member are respectively positioned by the positioning opening and the positioning surface, the positioning protrusion and the positioning notch in the plane transverse direction and the longitudinal direction; the engine comprises a wire harness extending along the length direction of the engine and arranged close to the oil dipstick, and at least the area close to the oil dipstick is arranged at the bottom of the sound insulation assembly; the first sound insulation member comprises a first sound absorbing module and a sound insulation module arranged outside the first sound absorbing module, the second sound insulation member comprises a second sound absorbing module, and the first sound insulation member is arranged on the side of the second sound insulation member away from the engine; the sound insulation module comprises an asphalt molecular base material and sound absorbing particles arranged in the asphalt molecular base material, the material density of the first sound absorbing module is less than the material density of the second sound absorbing module, and the first sound absorbing module and the second sound absorbing module are injection molded by using open-cell slow-rebound polyurethane foam material.

2. The soundproof cover mounting structure according to claim 1, characterized by The second sound insulation member has an avoiding area avoiding the oil dipstick, the ignition coil, the EGR pipe, the oil cover and the connection area, and the first sound insulation member is arranged at least on the avoiding area.

3. The soundproof cover mounting structure according to claim 1 or 2, characterized by The first sound insulation member is arranged on the side of the second sound insulation member away from the engine, the second sound insulation member has an ignition coil avoiding opening in communication with the ignition coil avoiding groove, part of the ignition coil extends into the ignition coil avoiding groove, and the ignition coil avoiding opening avoids the ignition coil.

4. The soundproof cover mounting structure according to claim 2, characterized by Part of the second sound insulation member protrudes in a direction away from the engine to form an air filter mounting area on one side of the avoidance area, the air filter mounting area has the positioning protrusion extending along the top-bottom direction on the outer side wall close to one side of the avoidance area, the edge of the first sound insulation member has the positioning notch matching the shape of the positioning protrusion, and the positioning protrusion is located in the positioning notch.

5. The soundproof cover mounting structure according to claim 3, characterized by The heat dissipation channel is open on one side close to the second sound insulation member, and the second sound insulation member has a heat dissipation opening located at the open end of the heat dissipation channel.

6. The soundproof cover mounting structure according to claim 1 or 2, characterized by The first sound insulation member has an oil level gauge avoidance hole, the second sound insulation member has an oil level gauge avoidance opening, the oil level gauge avoidance hole is in communication with the oil level gauge avoidance opening, and the oil level gauge is arranged in the oil level gauge avoidance hole and the oil level gauge avoidance opening.

7. The soundproof cover mounting structure according to claim 1, 2 or 4, characterized by The second sound insulation member has an oil cap avoidance hole, and the oil cap at least partially extends into the oil cap avoidance hole.

8. The soundproof cover mounting structure according to claim 7, characterized by Part of the outer side wall of the oil cap avoidance hole protrudes to form the positioning surface, and the first sound insulation member has the positioning opening abutting against the positioning surface.

9. The soundproof cover mounting structure according to claim 1 or 2, characterized by Part of the air filter protrudes to form a connecting part, the first sound insulation member has a first air filter avoidance hole, the second sound insulation member has a second air filter avoidance hole in communication with the first air filter avoidance hole, the connecting part is arranged in the first air filter avoidance hole and the second air filter avoidance hole and connected with the top of the engine.

10. The soundproof cover mounting structure according to claim 1, characterized by Part of the first sound insulation member close to the oil level gauge recesses towards one side close to the air filter to form a wire harness avoidance groove, and part of the wire harness is located in the wire harness avoidance groove.

11. A soundproofing assembly, characterised in that The sound insulation assembly is the sound insulation assembly of the sound insulation cover mounting structure of any one of claims 1-10.

12. The soundproofing assembly of claim 11, wherein, The first sound absorption module and the sound insulation module are bonded.

13. The sound insulation assembly of claim 11, wherein, The first sound absorption module and / or the second sound absorption module have a plurality of sound absorption holes in communication with each other and the outside.

14. The sound isolation assembly of claim 11, wherein, Part of the second sound absorption module recesses towards one side away from the engine to form a plurality of sound absorption slots arranged at intervals, and the width dimension of the sound absorption slots gradually decreases in a direction away from the engine.

15. An automobile characterized by comprising: The sound insulation cover mounting structure of claim 1.

16. A soundproof cover assembling method for the soundproof cover mounting structure according to claim 1, characterized by The sound insulation cover assembly method comprises the following steps: The second sound insulation member is mounted on the engine; The ignition coil and the EGR pipe are mounted on the engine; The first sound insulation member is mounted on the second sound insulation member; The oil level gauge and the air filter are mounted on the engine.

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