Engine mount for vehicle

Abstract

The present application provides a kind of vehicle engine suspension, in the configuration of engine suspension, a plurality of ribs are formed on the lower plate of nozzle plate in a predetermined arrangement, so that when the film is moved downward by large displacement input, the film first contacts the plurality of ribs, and in turn contacts the lower plate of nozzle plate and the upper fastening tube of valve housing and the like, so that the contact area and contact impact force when the film moves downward can be reduced, and therefore the generation of rattling noise can be easily prevented.

Description

Technical Field

[0001] The present invention relates to an engine mount for a vehicle, and more specifically, to an engine mount for a vehicle that can easily prevent the membrane inside the engine mount from contacting surrounding components and generating rattling noise when it moves up and down. Background Technology

[0002] Typically, when a vehicle's powertrain, including the engine and transmission, is installed in the engine compartment, engine mounts are used to mount the powertrain in order to effectively reduce engine vibration and noise transmitted to the vehicle body.

[0003] Engine mounts include fluid mounts with encapsulated fluid, vacuum negative pressure semi-active mounts, and electronic semi-active mounts. In high-end vehicles, electronic semi-active mounts are used to improve noise, vibration, and harshness (NVH) and driving vibration by changing dynamic characteristics according to driving conditions.

[0004] The electronic semi-active suspension refers to a suspension that can change dynamic characteristics by using electronic actuators, such as solenoid valves that open / close according to driving conditions, to connect or isolate the air chambers within the engine mount to the atmosphere.

[0005] Here, we will refer to Figure 1 Describe the construction and operation of a conventional semi-active engine mount.

[0006] like Figure 1 As shown, a conventional semi-active engine mount basically includes: a core bushing 20 with bolts 10 for engagement with the engine; a main rubber 30 formed on the outer diameter portion of the core bushing 20; a nozzle plate 40 with a flow path 41 for fluid flow between the upper fluid chamber 90 and the lower fluid chamber 92 formed around the nozzle plate; a membrane 50 mounted on the central portion of the nozzle plate 40; a diaphragm 60 ending at the lower fluid chamber 92, with the outer end of the diaphragm mounted on a housing 70; and a bracket 72 mounted on the outer diameter portion of the housing 70 for connection to the vehicle body.

[0007] Therefore, when vibrations caused by vehicle movement are input to the semi-active engine mount, the fluid in the upper fluid chamber 90 flows into the lower fluid chamber 92 through the flow path 41 of the nozzle plate 40 while the main rubber 30 is compressed, thereby achieving the damping of vibration.

[0008] In addition, in order to change the dynamic characteristics, the nozzle plate 40 in a conventional semi-active engine mount includes: an upper plate 42, spaced apart from the upper surface of the membrane 50 to form a first fluid chamber 94; and a lower plate 44, spaced apart from the bottom surface of the membrane 50 to form a second fluid chamber 96, and a solenoid valve 80 for communicating the second fluid chamber 96 with or isolating the second fluid chamber 96 from the atmosphere is connected to the lower plate 44.

[0009] Additionally, a second flow path 46 is formed through the upper plate 42 to connect the first fluid chamber 94 with the upper fluid chamber 90.

[0010] In fact, the upper fastening tube 84 of the valve housing 82 covering the solenoid valve 80 is pressed and fastened to the lower plate 44.

[0011] At this time, an exhaust pipe 86 is formed in the upper fastening tube 84 of the valve housing 82. The exhaust pipe 86 is connected to the second fluid chamber 96, which is a chamber filled with air, and the exhaust pipe 86 can be opened or closed according to the opening / closing operation of the solenoid valve 80.

[0012] For example, in order to improve the NVH performance of a vehicle, and if it is desired to reduce the dynamic characteristics of the semi-active engine mount, the membrane 50 needs to be in a state of easy movement.

[0013] Therefore, when current is applied to the solenoid valve 80 to open it, the exhaust pipe 86 is in an open state connected to the atmosphere, and the interior of the second fluid chamber 96 is connected to the atmosphere through the exhaust pipe 86, thereby allowing the membrane 50 to be in a state of easy movement.

[0014] On the other hand, in order to improve the driving performance of the vehicle, and in order to improve the dynamic characteristics of the semi-active engine mount, the membrane 50 needs to be in a state that is not easily moved.

[0015] Therefore, when the current applied to the solenoid valve 80 is released to close the solenoid valve 80, the exhaust pipe 86 is in a closed state isolated from the atmosphere, and the interior of the second fluid chamber 96 is in a state isolated from the atmosphere. Thus, the second fluid chamber 96 acts like an air spring, making the membrane 50 in a state that is not easily moved.

[0016] As described above, by making the interior of the second fluid chamber 96 communicate with or seal it from the atmosphere according to the opening / closing operation of the solenoid valve 80, the movement of the diaphragm 50 is restricted, thereby altering the dynamic characteristics of the semi-active engine mount.

[0017] However, the conventional semi-active engine mounts described above have the following problems.

[0018] When the semi-active engine mount is closed (i.e., the solenoid valve is closed), the diaphragm is not easily moved, thus preventing the rattling noise caused by diaphragm movement. However, when the semi-active engine mount is open (i.e., the solenoid valve is open), the diaphragm is easily moved. Therefore, when large vibrations are input to the engine mount under conditions such as bumpy driving or driving over speed bumps, such as... Figure 2 As shown, the membrane 50 moves downward and impacts the lower plate 44 of the nozzle plate 40 while simultaneously impacting the upper fastening tube 84 of the valve housing 82, thereby generating a rattling noise.

[0019] More specifically, when the solenoid valve 80 is open, and a large displacement is input to the engine mount under driving conditions that generate large vibrations, such as bumpy driving or driving over speed bumps, such as... Figure 2 As shown, the fluid in the upper fluid chamber 90 flows into the first fluid chamber 94 through the second flow path 46 of the nozzle plate 40 and pressurizes the membrane 50 downward. As a result, the membrane 50 moves downward rapidly and hits the lower plate 44 of the nozzle plate 40 and the upper fastening tube 84 of the valve housing 82 at the same time, thus generating a rattling noise.

[0020] In addition to the aforementioned semi-active engine mounts, even with conventional fluid-sealed engine mounts, there is a problem of diaphragm impacting the lower plate of the nozzle plate with a perforated structure, resulting in rattling noise when large displacements are input. Summary of the Invention

[0021] (a) Technical problems to be solved

[0022] The present invention is proposed to solve the problems in the prior art as described above, and its purpose is to provide an engine mount for a vehicle. In the structure of the engine mount, multiple ribs are formed in a predetermined arrangement on the lower plate of the nozzle plate, such that when the diaphragm moves downward by a large displacement input, the diaphragm first contacts the multiple ribs, and then sequentially contacts the lower plate of the nozzle plate and the upper fastening tube of the valve housing, etc., thereby reducing the contact area and contact impact force when the diaphragm moves downward, and thus easily preventing the generation of rattling noise.

[0023] (II) Technical Solution

[0024] To achieve the above objectives, the present invention provides an engine mount for a vehicle, comprising: a core bushing for coupling with an engine; a main rubber formed on the outer diameter portion of the core bushing; a nozzle plate having a flow path for fluid flow between an upper fluid chamber and a lower fluid chamber, and having a first fluid chamber and a second fluid chamber divided by a membrane; and a membrane mounted between the first fluid chamber and the second fluid chamber of the nozzle plate. The engine mount for the vehicle is characterized in that the nozzle plate comprises: an upper plate forming a first fluid chamber capable of communicating with the upper fluid chamber; and a lower plate spaced apart from the bottom surface of the membrane to form a second fluid chamber. A plurality of ribs are formed on the lower plate of the nozzle plate in a predetermined arrangement, such that the membrane first contacts the plurality of ribs when it moves downwards.

[0025] According to a first embodiment of the present invention, the vehicle engine mount is characterized in that a plurality of the ribs are arranged radially on the upper surface of the lower plate.

[0026] The multiple ribs can be formed independently or can be formed in a structure in which their inner ends are connected to each other.

[0027] According to a second embodiment of the present invention, the vehicle engine mount is characterized in that a plurality of the ribs are arranged radially on the upper surface of the lower plate, and the upper surface of each rib is formed to slope downward from the outside to the inside at a predetermined angle.

[0028] According to a third embodiment of the present invention, the vehicle engine mount is characterized in that a plurality of the ribs are arranged radially on the upper surface of the lower plate, and the upper surface of each rib is divided into a first downward inclined surface having a first inclination from the outside to the inside and a second downward inclined surface having a second inclination from the outside to the inside, and the first inclination of the first downward inclined surface is greater than the second inclination of the second downward inclined surface.

[0029] According to a fourth embodiment of the present invention, the vehicle engine mount is characterized in that a plurality of the ribs are arranged radially on the upper surface of the lower plate, and ribs with high vertical height and ribs with low vertical height are alternately formed.

[0030] According to a fifth embodiment of the present invention, the vehicle engine mount is characterized in that a plurality of the ribs are arranged radially on the upper surface of the lower plate, and the length of each rib is reduced such that the outer end of each rib is located at a predetermined distance from the outer end of the lower plate toward the inner side.

[0031] According to a sixth embodiment of the present invention, the vehicle engine mount is characterized in that a plurality of the ribs are arranged radially on the upper surface of the lower plate, and each rib is composed of an outer rib and an inner rib separated along its length direction.

[0032] The height of the outer rib is higher than the height of the inner rib.

[0033] According to a seventh embodiment of the present invention, the vehicle engine mount is characterized in that, when the membrane adopts a rectangular plate structure, one or two ribs are formed in a row on the upper surface of the lower plate and are formed at a position consistent with the line that bisects the membrane in the vertical direction.

[0034] According to an eighth embodiment of the present invention, the vehicle engine mount is characterized in that, when the membrane adopts a rectangular plate structure, one or two ribs are formed in a row on the upper surface of the lower plate and are formed at a position consistent with the line that divides the membrane in the vertical direction, and the upper surface of the ribs is formed to slope downward from the outside to the inside at a predetermined angle.

[0035] According to a ninth embodiment of the present invention, the vehicle engine mount is characterized in that, when the membrane adopts a rectangular plate structure, three or more ribs are formed at equal intervals on the upper surface of the lower plate.

[0036] The height of the two ribs on the sides of the three ribs is the same, and the height of the middle rib is lower than that of the two ribs on the sides.

[0037] According to a tenth embodiment of the present invention, the vehicle engine mount is characterized in that, when the membrane adopts a rectangular plate structure, a cross-shaped rib is formed on the upper surface of the lower plate, in which transverse ribs and longitudinal ribs intersect.

[0038] The upper surfaces of the transverse ribs and the longitudinal ribs are formed to slope downwards from the outside to the inside at a predetermined angle.

[0039] On the other hand, when the engine mount is configured as a semi-active engine mount, the second fluid chamber can be used as an air chamber, and a solenoid valve for communicating the second fluid chamber with the atmosphere or isolating the second fluid chamber from the atmosphere can be provided below the lower plate of the nozzle plate.

[0040] Additionally, when the engine mount is configured as a fluid-sealed engine mount, the second fluid chamber can be used as a fluid-fillable chamber, and a lower fluid chamber communicating with the second fluid chamber can be provided below the lower plate of the nozzle plate.

[0041] (III) Beneficial Effects

[0042] Through the above technical solution, the present invention provides the following effects.

[0043] In the semi-active engine mount configuration, multiple ribs are formed in a predetermined arrangement on the lower plate of the nozzle plate. When the solenoid valve is open, and the diaphragm moves downward through a large displacement input, the diaphragm first contacts the multiple ribs and then contacts the upper fastening tube of the valve housing. This reduces the contact area and impact force between the diaphragm and the lower plate when it moves downward, thus significantly reducing the generation of rattling noise.

[0044] That is, when the solenoid valve is open, when a large vibration is input to the engine mount under driving conditions such as bumpy driving or passing over speed bumps, and the diaphragm moves downward rapidly, the edge part of the diaphragm first contacts multiple ribs and is buffered, and the central part of the diaphragm contacts the upper fastening tube of the valve body, etc., thereby reducing the contact impact force on the lower plate when the diaphragm moves downward. Therefore, the level of rattling noise and indoor noise transmitted caused by contact impact can be significantly reduced.

[0045] Furthermore, in the construction of a conventional fluid-sealed engine mount, multiple ribs are formed in a predetermined arrangement on the lower plate of the nozzle plate with a perforated structure. When a large displacement vibration is input, the diaphragm contacts the ribs for the first time, thereby reducing the contact area and contact impact force between the diaphragm and the lower plate when it moves downward, thus significantly reducing the generation of rattling noise. Attached Figure Description

[0046] Figure 1 This is a schematic cross-sectional view showing a conventional semi-active engine mount.

[0047] Figure 2 This is a cross-sectional view showing the cause of noise generated during the operation of a conventional semi-active motor mount.

[0048] Figure 3 This is a cross-sectional view showing the semi-active engine mount according to the present invention.

[0049] Figure 4a and Figure 4b This is a view showing a first embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0050] Figure 5a and Figure 5b This is a view showing a second embodiment of the ribs formed on the nozzle plate of the semi-active engine mount according to the invention.

[0051] Figure 6a and Figure 6b This is a view showing a third embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0052] Figure 7a and Figure 7b This is a view showing a fourth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0053] Figure 8a and Figure 8b This is a view showing a fifth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0054] Figure 9a and Figure 9b This is a view showing a sixth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0055] Figure 10a , Figure 10b and Figure 10c This is a view showing a seventh embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0056] Figure 11a , Figure 11b and Figure 11c This is a view showing an eighth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0057] Figure 12a and Figure 12b This is a view showing a ninth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0058] Figure 13a , Figure 13b and Figure 13c This is a view showing a tenth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0059] Figure 14 This is an exemplary view showing ribs formed on the nozzle plate of a fluid-sealed engine mount according to the present invention.

[0060] Explanation of reference numerals in the attached figures

[0061] 10: Bolts; 20: Core bushings

[0062] 30: Main rubber; 40: Nozzle plate

[0063] 41: Flow path 42: Upper plate

[0064] 44: Lower plate 46: Second flow path

[0065] 50: Membrane; 60: Diaphragm

[0066] 70: Housing 72: Support

[0067] 80: Solenoid valve 82: Valve body

[0068] 84: Upper fastening pipe; 86: Exhaust pipe

[0069] 90: Upper fluid chamber; 92: Lower fluid chamber

[0070] 94: First fluid chamber; 96: Second fluid chamber

[0071] 100: Rib 101: First downwardly inclined surface

[0072] 102: Second downward sloping surface; 110: Outer rib

[0073] 120: Inner rib; 130: Transverse rib

[0074] 140: Longitudinal rib Specific Implementation

[0075] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0076] Figure 3 This is a cross-sectional view showing the semi-active engine mount according to the present invention.

[0077] like Figure 3 As shown, the semi-active engine mount according to the present invention basically comprises: a core bushing 20 having bolts 10 for engagement with the engine; a main rubber 30 formed on the outer diameter portion of the core bushing 20; a nozzle plate 40 having a flow path 41 for fluid flow between the upper fluid chamber 90 and the lower fluid chamber 92 formed around the nozzle plate; a membrane 50 mounted on the central portion of the nozzle plate 40; a diaphragm 60 ending the lower fluid chamber 92, and the outer end of the diaphragm being mounted on a housing 70; and a bracket 72 mounted on the outer diameter portion of the housing 70 for connection to the vehicle body.

[0078] The nozzle plate 40 includes: an upper plate 42, spaced apart from the upper surface of the membrane 50 to form a first fluid chamber 94; and a lower plate 44, spaced apart from the bottom surface of the membrane 50 to form a second fluid chamber 96 as an air chamber, and a solenoid valve 80 for communicating the second fluid chamber 96 with the atmosphere or isolating the second fluid chamber 96 from the atmosphere is connected to the lower plate 44.

[0079] At this time, a second flow path 46 is formed through the upper plate 42 to connect the first fluid chamber 94 with the upper fluid chamber 90, and the upper fastening tube 84 covering the valve housing 82 of the solenoid valve 80 is pressed and fastened to the lower plate 44.

[0080] Additionally, an exhaust pipe 86 communicating with the second fluid chamber 96 is formed in the upper fastening tube 84 of the valve housing 82, and the exhaust pipe 86 can be opened or closed according to the opening / closing operation of the solenoid valve 80.

[0081] That is, when current is applied to the solenoid valve 80 to open the solenoid valve 80, the exhaust pipe 86 is in an open state that is connected to the atmosphere. The interior of the second fluid chamber 96, which is an air chamber, is connected to the atmosphere through the exhaust pipe 86, thereby allowing the membrane 50 to be in a state of easy movement.

[0082] According to the present invention, a plurality of ribs 100 are integrally formed on the lower plate 44 of the nozzle plate 40 with a predetermined length and a predetermined arrangement, such that when the membrane 50 moves downward, it first contacts the plurality of ribs 100.

[0083] Therefore, when the membrane 50 moves downward, the membrane 50 does not contact the surface of the lower plate 44, but instead contacts the multiple ribs 100 for the first time. This reduces the contact area and impact force when the membrane 50 moves downward, thus significantly reducing the level of rattling noise and indoor transmission noise caused by contact impact.

[0084] More specifically, when the solenoid valve 80 is open, and a large displacement is input to the engine mount under driving conditions such as bumpy driving or passing over speed bumps that generate large vibrations, the fluid in the upper fluid chamber 90 flows into the first fluid chamber 94 through the second flow path 46 of the nozzle plate 40 and pressurizes the diaphragm 50 downward. Then the diaphragm 50 moves downward rapidly. At this time, the edge portion of the diaphragm 50 contacts multiple ribs 100 for the first time and is buffered, and the central portion of the diaphragm 50 contacts the upper fastening tube 84 of the valve housing 82 for the second time. This can reduce the contact impact force when the diaphragm 50 moves downward, and thus can significantly reduce the level of rattling noise and indoor noise transmitted caused by contact impact.

[0085] Hereinafter, the ribs 100 formed on the lower plate 44 of the nozzle plate 40 are described in detail for each embodiment.

[0086] Figure 4a and Figure 4b A first embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention is shown.

[0087] like Figure 4a As shown, according to the first embodiment of the present invention, a plurality of ribs 100 have a straight strip shape and are formed radially on the upper surface of the lower plate 44 of the nozzle plate 40.

[0088] Each of the plurality of ribs 100 may be formed independently on the upper surface of the lower plate 44, or may be formed in a structure in which their inner ends are connected to each other.

[0089] Preferably, the outer end of each rib 100 is aligned vertically with the outer end of the lower plate 44, and the inner end of each rib 100 is located adjacent to the upper fastening tube 84 of the valve housing 82.

[0090] Therefore, when the solenoid valve 80 is open, and a large displacement is input to the engine mount under driving conditions such as bumpy driving or passing over speed bumps that generate large vibrations, causing the diaphragm 50 to move rapidly downwards, such as... Figure 4b As shown, the edge portion of the membrane 50 is initially contacted by multiple ribs 100 and thus buffered, while the central portion of the membrane 50 is in secondary contact with the upper fastening tube 84 of the valve housing 82, thereby reducing the contact area and impact force when the membrane 50 moves downward. As a result, the level of rattling noise and indoor noise transmitted caused by contact impact can be significantly reduced.

[0091] Figure 5a and Figure 5b A second embodiment of the ribs formed on the nozzle plate of the semi-active engine mount according to the invention is shown.

[0092] like Figure 5a As shown, according to the second embodiment of the present invention, a plurality of ribs 100 have a straight strip shape and are formed radially on the upper surface of the lower plate 44 of the nozzle plate 40, such as... Figure 5b As shown, the upper surface of each rib 100 is formed to slope downward from the outside to the inside at a predetermined angle.

[0093] More specifically, considering that when the membrane 50 expands downward and impacts and contacts the lower plate 44 of the nozzle plate 40, the deformation of the central region of the membrane 50 is greater than that of the edge portion, the upper surface of each rib 100 is formed to slope downward from the outside to the inside at a predetermined angle.

[0094] Therefore, when the membrane 50 moves downward, the edge of the membrane 50, which has a smaller deformation compared to the central region of the membrane 50, first contacts the outer end of each rib 100, then the central region of the membrane 50 contacts the inner end of each rib 100 a second time, and then the central part of the membrane 50 contacts the upper fastening tube 84 of the valve housing 82 a third time. This reduces the contact area caused by the downward movement of the membrane 50 while buffering the impact force, so that no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0095] Figure 6a and Figure 6b A third embodiment is shown, in which a rib is formed on the nozzle plate of the semi-active engine mount according to the invention.

[0096] like Figure 6a As shown, according to the third embodiment of the present invention, a plurality of ribs 100 have a straight strip shape and are radially arranged on the upper surface of the lower plate 44 of the nozzle plate 40, such as... Figure 6bAs shown, the upper surface of each rib 100 is divided into a first downward inclined surface 101 with a first inclination from the outside to the inside and a second downward inclined surface 102 with a second inclination from the outside to the inside, and the first inclination of the first downward inclined surface 101 is formed to be greater than the second inclination of the second downward inclined surface 102.

[0097] More specifically, considering that when the membrane 50 expands downward and impacts and contacts the lower plate 44 of the nozzle plate 40, the deformation of the central region of the membrane 50 is greater than that of the edge portion, and the membrane 50 forms a downward convex curved trajectory, the upper surface of each rib 100 is divided as described above to form a first downward inclined surface 101 with a first inclination and a second downward inclined surface 102 with a second inclination.

[0098] Therefore, when the membrane 50 moves downward, the edge of the membrane 50, which has a smaller deformation compared to the central region of the membrane 50, first contacts the first downwardly inclined surface 101 of each rib 100, then the central region of the membrane 50 contacts the second downwardly inclined surface 102 of each rib 100 a second time, and then the central part of the membrane 50 contacts the upper fastening tube 84 of the valve housing 82 a third time, thereby buffering the impact force caused by the downward movement of the membrane 50, so that no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0099] Figure 7a and Figure 7b A fourth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention is shown.

[0100] like Figure 7a As shown, according to the fourth embodiment of the present invention, a plurality of ribs 100 have a straight strip shape and are radially arranged on the upper surface of the lower plate 44 of the nozzle plate 40, and are characterized in that, as Figure 7b As shown, ribs 100 with high vertical height and ribs 100 with low vertical height are alternately formed.

[0101] For example, when a total of 8 ribs 100 are formed radially on the upper surface of the lower plate 44 of the nozzle plate 40, the height of the 1st, 3rd, 5th and 7th ribs 100 can be formed to be higher than the height of the 2nd, 4th, 6th and 8th ribs 100.

[0102] Therefore, when the membrane 50 moves downward, it first contacts the high-height rib 100, then contacts the low-height rib 100 a second time, and then the central part of the membrane 50 contacts the upper fastening tube 84 of the valve housing 82 a third time, thereby buffering the impact force caused by the downward movement of the membrane 50, so that no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0103] Figure 8aand 8b A fifth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention is shown.

[0104] like Figure 8a and Figure 8b As shown, according to the fifth embodiment of the present invention, a plurality of ribs 100 have a straight strip shape and are radially arranged on the upper surface of the lower plate 44 of the nozzle plate 40, and is characterized in that the length of each rib 100 is reduced such that the outer end of each rib 100 is located at a predetermined distance from the outer end of the lower plate 44 toward the inward side.

[0105] Compared with the ribs 100 of the first to fourth embodiments described above, the ribs 100 of the fifth embodiment of the present invention are formed to be shorter in length only according to the size of the semi-active motor mount and the amount of noise reduction required. They can also perform the following functions: reduce the contact area and impact force when the membrane 50 moves downward, and reduce the level of noise and indoor transmission noise caused by contact impact.

[0106] Figure 9a and 9b A sixth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention is shown.

[0107] like Figure 9a and Figure 9b As shown, according to the sixth embodiment of the present invention, a plurality of ribs 100 have a straight strip shape and are arranged radially on the upper surface of the lower plate 44 of the nozzle plate 40, and is characterized in that the length of each rib 100 is reduced such that each rib 100 is composed of an outer rib 110 and an inner rib 120 separated along its length direction.

[0108] In particular, considering that when the membrane 50 expands downward and impacts and contacts the lower plate 44 of the nozzle plate 40, the deformation of the central region of the membrane 50 is greater than that of the edge portion, the height of the outer rib 110 is made higher than that of the inner rib 120.

[0109] Preferably, the upper surfaces of the outer rib 110 and the inner rib 120 can be formed as surfaces that slope downwards inwards at a predetermined angle.

[0110] Therefore, when the membrane 50 moves downward, the edge of the membrane 50, which has a smaller deformation compared to the central region of the membrane 50, first contacts the outer rib 110, then the central region of the membrane 50 contacts the inner rib 120 a second time, and then the central part of the membrane 50 contacts the upper fastening tube 84 of the valve housing 82 a third time, thereby buffering the impact force caused by the downward movement of the membrane 50, so that no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0111] On the other hand, depending on the vehicle type, the appearance of the semi-active engine mount is manufactured in a box shape rather than a circle. In the case of the box-shaped semi-active engine mount, the diaphragm and nozzle plate adopt a rectangular plate structure.

[0112] Therefore, when the membrane and the nozzle plate are rectangular, preferably, the shape of the ribs formed on the lower plate of the nozzle plate is different, taking into account the dynamic characteristics of the suspension.

[0113] Here, when the membrane and the nozzle plate are rectangular, the ribs formed on the lower plate of the nozzle plate are described below for each embodiment.

[0114] Figure 10a , Figure 10b and Figure 10c A seventh embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention is shown.

[0115] like Figure 10a As shown, the ribs 100 according to the seventh embodiment of the present invention have a straight strip shape and are formed in a straight line on the upper surface of the lower plate 44 of the nozzle plate 40.

[0116] More specifically, when the membrane 50 adopts a rectangular plate structure, one or two ribs 100 are formed in a row on the upper surface of the lower plate 44, and are formed at a position consistent with the line that bisects the membrane 50 in the vertical direction.

[0117] Therefore, as Figure 10b and Figure 10c As shown, when the membrane 50 moves downward, the middle part of the membrane 50 in the length direction contacts the rib 100 for the first time, and then the two ends of the membrane 50 contact the lower plate 44 for the second time, thereby buffering the impact force caused by the downward movement of the membrane 50. Therefore, no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0118] At this time, as Figure 10c As shown, after the membrane 50 first contacts the rib 100, both ends of the membrane 50 then contact the rib 100, thereby increasing the area of ​​the initial contact and making it easier to buffer the impact force caused by the downward movement of the membrane 50.

[0119] Figure 11a , 11b Figures 11c show an eighth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0120] like Figure 11a As shown, the ribs 100 according to the eighth embodiment of the present invention have a straight strip shape and are formed in a straight line on the upper surface of the lower plate 44 of the nozzle plate 40, and as... Figure 11b and Figure 11c As shown, the upper surface of the rib 100 is formed to slope downward from the outside to the inside at a predetermined angle.

[0121] Similarly, since the membrane 50 adopts a rectangular plate structure, one or two ribs 100 are formed in a row on the upper surface of the lower plate 44, and are formed at a position consistent with the line that bisects the membrane 50 in the vertical direction.

[0122] Therefore, as Figure 11b and Figure 11c As shown, when the membrane 50 moves downward, the middle part of the membrane 50 in the length direction makes first contact and second contact with the downward inclined surface of the rib 110 in sequence. Then, the two ends of the membrane 50 make third contact with the lower plate 44, thereby buffering the impact force caused by the downward movement of the membrane 50. Therefore, no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0123] Figure 12a and Figure 12b A ninth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention is shown.

[0124] like Figure 12a As shown, the ribs 100 according to the ninth embodiment of the present invention have a straight strip shape and are formed in a straight line on the upper surface of the lower plate 44 of the nozzle plate 40, characterized in that three or more ribs 100 are formed at equal intervals on the upper surface of the lower plate 44.

[0125] In particular, such as Figure 12b As shown, the height of the two side ribs 100 is the same, and the height of the middle rib 100 is lower than that of the two side ribs 100.

[0126] Therefore, as Figure 12b As shown, when the membrane 50 moves downward, the two ends of the membrane 50 first contact the two higher ribs 100, and then the middle part of the membrane 50 contacts the middle rib 100 with a lower height for the second time, thereby buffering the impact force caused by the downward movement of the membrane 50. Therefore, no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0127] Figure 13a , 13b Figures 13c show a tenth embodiment of a rib formed on the nozzle plate of a semi-active engine mount according to the invention.

[0128] like Figure 13aAs shown, the rib 100 according to the tenth embodiment of the present invention is characterized in that the transverse rib 130 and the longitudinal rib 140 are formed in an intersecting cross-shaped structure on the upper surface of the lower plate 44 of the nozzle plate 40.

[0129] Specifically, the upper surfaces of the transverse rib 130 and longitudinal rib 140 constituting the rib 100 are formed as surfaces that slope downward from the outside towards the center at a predetermined angle.

[0130] Therefore, as Figure 13b As shown, when the membrane 50 moves downward, the middle portion of the membrane 50 in the width direction makes first and second contact with the downward inclined surface of the transverse rib 130, and at the same time, the middle portion of the membrane 50 in the length direction makes first and second contact with the downward inclined surface of the longitudinal rib 130, thereby buffering the impact force caused by the downward movement of the membrane 50. Therefore, no rattling noise is generated, or even if rattling noise is generated, the noise level can be reduced.

[0131] On the other hand, although it has been described that ribs are formed on the lower plate of the nozzle plate in the construction of a semi-active engine mount according to the above embodiments, ribs can also be formed on the lower plate of the nozzle plate with a perforated structure in the construction of a conventional fluid-sealed engine mount (hydraulic engine mount).

[0132] like Figure 14 As shown, the nozzle plate 40 with a perforated structure in the fluid-sealed engine mount configuration may also include: an upper plate 42, spaced apart from the upper surface of the membrane 50 to form a first fluid chamber 94; and a lower plate 44, spaced apart from the bottom surface of the membrane 50 to form a second fluid chamber 96, wherein the first fluid chamber 94 may be configured to communicate with the upper fluid chamber 90, and the second fluid chamber 96 is a fluid-fillable chamber and may be configured to communicate with the lower fluid chamber 92.

[0133] On the lower plate 44 of the nozzle plate 40 of this fluid-sealed engine, a plurality of ribs 100 are also formed in a predetermined arrangement. When a large displacement vibration is input, the membrane moves downward and contacts the ribs for the first time, thereby reducing the contact area and contact impact force between the membrane and the lower plate when it moves downward, thus greatly reducing the generation of rattling noise.

Claims

1. A vehicle engine mount, comprising: Core bushing, used for connection with the engine; main rubber, formed on the outer diameter portion of the core bushing; The nozzle plate has a flow path for fluid flow between the upper fluid chamber and the lower fluid chamber, and has a first fluid chamber and a second fluid chamber divided by a membrane; And a membrane, installed between the first and second fluid chambers of the nozzle plate, and the vehicle engine mount is characterized in that, The nozzle plate includes: The upper plate forms a first fluid chamber that can communicate with the upper fluid chamber; as well as The lower plate is spaced apart from the bottom surface of the membrane to form a second fluid chamber. A plurality of ribs are formed in a predetermined arrangement on the lower plate of the nozzle plate, such that when the membrane moves downward, it first contacts the plurality of ribs. The plurality of ribs are arranged radially on the upper surface of the lower plate, and When a large displacement is input to the engine mount and the diaphragm moves downward, the edge portion of the diaphragm first contacts the multiple ribs and is cushioned, and the central portion of the diaphragm secondarily contacts the upper fastening tube of the valve housing.

2. The vehicle engine mount according to claim 1, characterized in that, The ribs are formed independently or in a structure in which their inner ends are connected to each other.

3. The vehicle engine mount according to claim 1, characterized in that, The upper surface of each rib is formed to slope downwards from the outside to the inside at a predetermined angle.

4. The engine mount for a vehicle according to claim 1, characterized in that, The upper surface of each rib is divided into a first downward inclined surface with a first inclination from the outside to the inside and a second downward inclined surface with a second inclination from the outside to the inside.

5. The vehicle engine mount according to claim 4, characterized in that, The first inclination of the first downwardly inclined surface is greater than the second inclination of the second downwardly inclined surface.

6. The engine mount for a vehicle according to claim 1, characterized in that, Ribs with high vertical height and ribs with low vertical height alternate to form a structure.

7. The vehicle engine mount according to claim 1, characterized in that, Adjust the length of each rib so that the outer end of each rib is located at a predetermined distance from the outer end of the lower plate towards the inner side.

8. The engine mount for a vehicle according to claim 1, characterized in that, Each rib consists of an outer rib and an inner rib separated along its length.

9. The engine mount for a vehicle according to claim 8, characterized in that, The height of the outer rib is higher than the height of the inner rib.

10. The engine mount for a vehicle according to claim 1, characterized in that, When the membrane adopts a rectangular plate structure, one or two ribs are formed in a row on the upper surface of the lower plate, and are formed at a position consistent with the line that bisects the membrane in the vertical direction.

11. The engine mount for a vehicle according to claim 1, characterized in that, When the membrane adopts a rectangular plate structure, one or two ribs are formed in a row on the upper surface of the lower plate and are formed at a position consistent with the line that divides the membrane in the vertical direction, and the upper surface of the ribs is formed to slope downward from the outside to the inside at a predetermined angle.

12. The engine mount for a vehicle according to claim 1, characterized in that, When the membrane adopts a rectangular plate structure, three or more ribs are formed at equal intervals on the upper surface of the lower plate.

13. The engine mount for a vehicle according to claim 12, characterized in that, The height of the two ribs on the sides of the three or more ribs is the same, and the height of the middle rib is lower than that of the two ribs on the sides.

14. The engine mount for a vehicle according to claim 1, characterized in that, When the membrane adopts a rectangular plate structure, a cross-shaped rib is formed on the upper surface of the lower plate, where transverse ribs and longitudinal ribs intersect.

15. The engine mount for a vehicle according to claim 14, characterized in that, The upper surfaces of the transverse ribs and the longitudinal ribs are formed to slope downwards from the outside to the inside at a predetermined angle.

16. The engine mount for a vehicle according to claim 1, characterized in that, When the engine mount is configured as a semi-active engine mount, the second fluid chamber is used as an air chamber, and a solenoid valve for communicating the second fluid chamber with the atmosphere or isolating the second fluid chamber from the atmosphere is provided below the lower plate of the nozzle plate.

17. The engine mount for a vehicle according to claim 1, characterized in that, When the engine mount is configured as a fluid-sealed engine mount, the second fluid chamber is used as a fluid-fillable chamber, and a lower fluid chamber communicating with the second fluid chamber is provided below the lower plate of the nozzle plate.

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