Noise reflectors, fender linings

Abstract

The present invention is a noise reflector, a fender lining, and a noise reduction method for reducing engine sound leaking to the side of a vehicle. In this embodiment, the noise reflector (10) is mounted on the lower surface of a front side beam (20), and the sound reflecting surface (11A) of the noise reflector (10) is arranged to face a side opening (92C) formed on the side of an engine room (91).

Description

Technical Field

[0001] The present disclosure relates to a noise reflector for reducing engine sound leaking to the outside of a vehicle, a fender lining including the noise reflector, and a noise reduction method. Background Art

[0002] As such a noise reflector, there is known a noise reflector that covers the engine from below (for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-170584 (paragraphs

[0013] ,

[0014] , Figure 1 ) Summary of the invention

[0006] Problems to be solved by the invention

[0007] With respect to the above-mentioned conventional noise reflectors, there is a demand for development of a technology for reducing the engine sound leaking to the side compared with the related art.

[0008] Solutions to Solve Problems

[0009] The first solution of the invention completed to solve the above-mentioned problems is a noise reflector that reduces the engine sound that passes under the side beam of a vehicle and leaks to the side of the vehicle, wherein the noise reflector has a sound reflecting surface that is arranged in a manner overlapping with the lower surface of the side beam and is inclined relative to the vertical direction in a manner that tends to be downward as it separates from the engine to the side, and the noise reflector reflects the engine sound received by the sound reflecting surface downward and interferes with the engine sound that passes under the side beam. Here, the side beam includes both a side beam extending over a substantially entire range in the front-rear direction of the vehicle and a front side beam extending in the front-rear direction in the engine room of the vehicle.

[0010] A thirteenth embodiment of the present invention is a silencing method for reducing engine sound that passes under a side member of a vehicle and leaks to a side of the vehicle, wherein a noise reflector arranged in a manner overlapping with the side member is used to reflect the engine sound downward and interfere with the engine sound that passes under the side member. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front cross-sectional view of the front portion of the vehicle according to the first embodiment.

[0012] Figure 2 This is a top view of the wheel house viewed from above the vehicle.

[0013] Figure 3 This is a perspective view of the wheel house as viewed from the front side of the vehicle.

[0014] Figure 4 This is a perspective view of the fender liner viewed from the rear side of the vehicle.

[0015] FIG. 5(A) is a perspective view of the noise reflector as viewed from the sound reflecting surface side, and FIG. 5(B) is a perspective view of the noise reflector as viewed from the side opposite to the sound reflecting surface.

[0016] Figure 6 This is a diagram showing the flow of engine sound from the side opening toward the side.

[0017] FIG7(A) is a diagram schematically showing the structure of the noise reflector of Example 1, FIG7(B) is a diagram schematically showing the structure of the noise reflector of Example 2, and FIG7(C) is a diagram schematically showing the structure of the noise reflector of Comparative Example 1.

[0018] Figure 8 This is a top view of the test road as seen from above.

[0019] Fig. 9 It is a graph which shows the result of a confirmation experiment.

[0020] Fig.10 It is an enlarged front cross-sectional view of the noise reflector according to the second embodiment.

[0021] Fig.11 This is a perspective view of the fender liner viewed from the rear side of the vehicle.

[0022] Fig.12 It is an enlarged front cross-sectional view of a noise reflector according to a third embodiment.

[0023] Fig.13 It is an enlarged front cross-sectional view of a noise reflector according to another embodiment.

[0024] 14(A) and 14(B) are front cross-sectional views of noise reflectors according to other embodiments.

[0025] Description of reference numerals:

[0026] 10, 10S, 10V, 10W, 10X, 10Y, 10Z Noise reflectors

[0027] 11, 11S, 11X Sound Reflection Panel

[0028] 11A Sound reflecting surface

[0029] 11B Mounting hole

[0030] 12 Mounting plate

[0031] 14 Side protrusion

[0032] 15 Separating protrusion

[0033] 18 Extended wall

[0034] 19, 19X bent tab

[0035] 20 Side beam

[0036] 22, 22V, 22W, 22X, 22Y, 22Z fender lining

[0037] 22B Inner wall

[0038] 23 Gap

[0039] 33 Shock absorber

[0040] 40 Integrated hinge

[0041] 90, 90X vehicles

[0042] B Fasten the connecting components. DETAILED DESCRIPTION

[0043] [First embodiment]

[0044] Below, refer to Figure 1 to Figure 6 A first embodiment of a vehicle 90 including the noise reflector 10 of the present disclosure will be described. Figure 1 The vehicle 90 of the present embodiment shown is, for example, a passenger car that has an engine 95 mounted on the front to drive the front wheels 91. The engine room 93 of the vehicle 90 has cover walls 92A and 92B on both sides and the bottom to suppress sound leakage to the sides and below. Figure 2 As shown, the cover wall 92A on both sides has side openings 92C formed therein to guide the drive shaft 31 and the tie rod 32 of the front wheel 91 out of the engine room 93. In order to suppress the sound leakage to the side from the side openings 92C, the noise reflector 10 of the present disclosure is arranged on the lower surface of the front side member 20.

[0045] The periphery of the noise reflector 10 is specifically as follows. Figure 1 As shown, the front side beam 20 is located outside the side cover wall 92A and forms, for example, a square tube structure and extends in the front-rear direction. Figure 3 As shown in FIG. 1 , the front side member 20 forms a substantially horizontal horizontal portion 20A from the front end to a position close to the rear end, and a portion of the front side member 20 that is closer to the rear side than the horizontal portion 20A forms an inclined portion 20B that is inclined rearward and downward. Furthermore, a wheel house 96 is disposed in a range from the center of the horizontal portion 20A of the front side member 20 to the front portion of the inclined portion 20B.

[0046] like Figure 1 As shown in FIG. 2 , the fender lining 22 in the wheel house 96 includes an inner wall 22B fixed to the outer side of the front side member 20 in an overlapping manner. Figure 4 As shown, a notch 23 extends from the top of the arc wall 22A to the lower end of the inner wall 22B at the top of the arc wall 22A in the fender lining 22, and the notch 23 is used to allow the shock absorber 33 of the front wheel 91 to pass through and to allow the shock absorber 33 to pass through when the fender lining 22 is assembled in the wheel housing 96. It should be noted that mounting holes 24 are respectively provided at positions separated from the lower end of the inner wall 22B on both sides of the notch 23 in the inner wall 22B, and the inner wall 22B is fixed to the front side member 20 by the fastening member B passing through these mounting holes 24.

[0047] like Figure 3 As shown, the sub-frame 21 is provided at a position spaced downward from the front side member 20. The cover wall 92B mentioned above is overlapped on the lower surface of the sub-frame 21. The side opening 92C mentioned above is opened in the wheel house 96 and between the front side member 20 and the sub-frame 21.

[0048] In order to suppress sound leakage from the side opening 92C to the side, a plurality (eg, three) of noise reflectors 10 are fixedly arranged in the front-rear direction on the lower surface of the front side member 20 so as to face the side opening 92C.

[0049] The noise reflector 10 is, for example, an injection molded product of a resin, and is shown in a single state in FIG. 5(A) and FIG. 5(B). As shown in FIG. 5(A), the noise reflector 10 includes a strip-shaped mounting plate portion 12 extending along the length direction of the front side beam 20 (the front-rear direction of the vehicle 90). As shown in FIG. 5(B), a quadrilateral side protrusion wall 14 having the same width as the mounting plate portion 12 is suspended from a position close to both ends in the length direction of the mounting plate portion 12, and a sound reflecting plate 11 is provided between these side protrusion walls 14. The sound reflecting plate 11 and the mounting plate portion 12 are configured to be approximately V-shaped or approximately R-shaped when viewed from the front-rear direction.

[0050] The sound reflecting plate 11 has a cross-sectional shape of a quarter circle and extends in the longitudinal direction of the front side beam 20. In addition, the radius of the outer peripheral surface of the sound reflecting plate 11 is formed to be substantially the same as the width of the mounting plate portion 12. In addition, one side portion of the mounting plate portion 12 is integrated with the upper portion of the sound reflecting plate 11 in such a manner that the plate thickness surface of one side of the width direction of the mounting plate portion 12 is shared with the plate thickness surface of the upper portion of the sound reflecting plate 11, and both ends of the sound reflecting plate 11 are connected to a pair of side protruding walls 14.

[0051] The inner surface of the circular arc of the sound reflecting plate 11 forms the sound reflecting surface 11A of the present disclosure. It should be noted that the radius of curvature of the sound reflecting surface 11A is preferably 20 to 30 [mm], and the circumference of the sound reflecting surface 11A is preferably 30 to 50 [mm]. In addition, a pair of partition protrusions 15 are provided on the sound reflecting surface 11A at positions that divide the length direction of the sound reflecting plate 11 into three equal parts, for example. Each partition protrusion 15 has the same shape as the portion of the side protrusion 14 that extends from the inner surface of the sound reflecting plate 11.

[0052] The portion of the mounting plate portion 12 closer to the end than the side protrusion 14 forms a fixing portion 12A, where a mounting hole 12B is formed. A bolt passing through the mounting hole 12B is fastened to a threaded hole (not shown) formed on the lower surface of the front side member 20, thereby fixing the noise reflector 10 to the front side member 20.

[0053] It should be noted that the noise reflector 10 of the present embodiment is an injection molded product of resin, but may also be a vacuum molded product. In addition, the noise reflector 10 is not limited to being made of resin, and may also be made of metal, for example. Furthermore, the fixing to the lower surface of the front side beam 20 is not limited to bolts, and may also be rivets, adhesives, and if the material is metal, it may also be welding, etc.

[0054] Next, the effect of the noise reflector 10 of this embodiment will be described. The engine sound generated in the engine room 93 and directed to the side leaks out of the vehicle through the side opening 92C between the front side beam 20 and the sub-frame 21. In this embodiment, the following structure is adopted: a plurality of noise reflectors 10 are mounted on the lower surface of the front side beam 20, and the sound reflecting surface 11A of the noise reflector 10 is arranged to face the side opening 92C. Therefore, the path of the engine sound from the side opening 92C to the side is as follows: Figure 6 As shown, the sound is divided into a first path 16R that passes through the sound reflecting surface 11A, and a second path 17R that passes directly under the noise reflector 10 without passing through the sound reflecting surface 11A and is released to the outside of the vehicle.

[0055] The engine sound passing through the first path 1.6R is reflected by the sound reflecting surface 11A of the noise reflector 10 and flows downward. Then, it merges with the engine sound traveling straight through the second path 17R. The wavelength of the engine sound reflected by the sound reflecting surface 11A is out of phase with the wavelength of the engine sound traveling straight, so they interfere with each other when merging. As a result, the engine sound is reduced below the front side member 20 before leaking out of the vehicle.

[0056] Here, by reducing the noise level of the sound of the frequency with the highest noise level among the engine sounds leaking out of the vehicle, the noise level of the engine sound as a whole can be reduced. Therefore, it is desirable to reduce the sound of the frequency band 800 to 1250 [Hz] which is the peak of the engine sound. If the radius of curvature of the sound reflecting surface 11A is set to 20 to 30 [mm] and the perimeter is set to 30 to 50 [mm] as in the present embodiment, the frequency centered on the frequency band 800 to 1250 [Hz] can be used as the center, and a good reduction effect can be obtained.

[0057] Furthermore, since the noise reflector 10 is provided with a pair of side protruding walls 14, when the engine sound is reflected at the end of the sound reflecting plate 11A in the front-rear direction of the vehicle 90, it is possible to prevent the engine sound from being released from the noise reflector 10 in the front-rear direction of the vehicle 90. Thus, the engine sound passing through the first path 16R can be directed downward without waste and interfere with the engine sound passing through the second path 17R, thereby improving the efficiency of reducing the engine sound leaking out of the vehicle.

[0058] Furthermore, since the noise reflector 10 is provided with a pair of partitioning protrusions 15, it is possible to suppress the engine sound reflected by the sound reflecting surface 11A from spreading in the front-rear direction of the vehicle 90. Thus, the engine sound passing through the first path 16R can be directed downward without waste and efficiently interfere with the engine sound passing through the second path 17R.

[0059] Here, if the noise reflector 10 is arranged on the inner side of the front side beam 20, it is possible to interfere with various auxiliary machines, and if the noise reflector 10 is arranged on the outer side of the front side beam 20, it is possible to interfere with the shock absorber 33. However, in this embodiment, since the noise reflector 10 is arranged below the front side beam 20, there is no concern about interference with these components, and the degree of freedom of the shape of the noise reflector 10 becomes higher.

[0060] Furthermore, since the noise reflector 10 is an independent component, the noise reflector 10 can be common among vehicle models having different shapes of the front side members 20. Furthermore, the position and number of installation can be appropriately changed in accordance with the position and size of the drive shaft 31 and the tie rod 32. In addition, since the installation plate portion 12 is provided, the installation work is also facilitated.

[0061] [Confirmation experiment]

[0062] An experiment for confirming the noise reduction effect of the noise reduction structure of the present disclosure is described. In this experiment, the following embodiments 1 and 2 as vehicles having the noise reduction structure of the present disclosure and the following comparative examples 1 and 2 as vehicles not having the noise reduction structure of the present disclosure were prepared. It should be noted that the main body of the vehicle used in the embodiments 1 and 2 and the comparative examples 1 and 2 is the same, for example, a 2000cc front engine four-wheel drive passenger car, and the size of the side opening 92C is about 250 [mm] in width and about 150 [mm] in height.

[0063] (Structure of Example and Comparative Example)

[0064] As shown in FIG7(A), in the first embodiment, three noise reflectors 10 described in the first embodiment are provided on the lower surface of the front side beam 20 of the above-mentioned vehicle. In addition, the width of the front side beam 20 is wider than the width of the noise reflector 10, and the noise reflector 10 is arranged in a manner close to the outer side of the lower surface of the front side beam 20. The radius of curvature of the sound reflecting surface 11A of the noise reflector 10 is 25 [mm]. In addition, the length of the noise reflector 10 along the longitudinal direction of the front side beam 20 is 240 [mm], the width of the noise reflector 10 is 26 [mm], and the height of the noise reflector 10 is 26 [mm].

[0065] As shown in Fig. 7(B), the second embodiment is a structure in which the noise reflector 10 of the first embodiment is replaced with a noise reflector 10S. The noise reflector 10S is different from the noise reflector 10 only in the structure of the sound reflecting plate 11S. That is, the sound reflecting plate 11S of the noise reflector 10S is in the shape of a flat plate inclined at an inclination angle of, for example, 45[DEG] relative to the vertical direction, and the sound reflecting surface 11A of the sound reflecting plate 11S is a flat surface that is inclined downward as it moves away from the engine 95 in the lateral direction.

[0066] As shown in FIG. 7(C), the noise reflector 10 of the first embodiment is replaced with a noise reflector 10T in the comparative example 1. The noise reflector 10T is different from the noise reflector 10 only in the structure of the sound reflecting plate 11T. That is, the sound reflecting plate 11T of the noise reflector 10T is in a flat plate shape so as to be orthogonal to the lower surface of the front side beam 20.

[0067] Comparative Example 2 has a structure in which no noise reflector is provided on the lower surface of the front side member 20 , but this is not shown in the figure.

[0068] (Experimental Method)

[0069] In the experiment, Figure 8As shown, each vehicle of the above-mentioned embodiments 1, 2, and comparative examples 1, 2 enters the point A as the acceleration line at a speed of 50 [km / h] on the ISO road specified in ISO10844, and starts to accelerate from there with the throttle fully open and travels for 20 [m], and then the throttle is fully closed at the point B as the acceleration end line, and the noise during this period is measured. The microphone is located at the point P as the middle point of the line between the points A and B, and is set at a height of 1.2 [m] away from the center of the vehicle 90 by 7.5 [m], and the maximum noise level in the measurement section is taken as the measurement result.

[0070] exist Fig. 9 The measurement results of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in FIG. From the measurement results, it can be seen that the noise level of Examples 1 and 2 in the frequency band 800 to 1250 [Hz] is smaller than that of Comparative Examples 1 and 2. Therefore, in the noise reflectors 10 and 10S of Examples 1 and 2, it is considered that the range of the path difference between the first path 16R and the second path 17R is defined around 1 / 2 times the wavelength of the frequency band 800 to 1250 [Hz]. In other words, it can be confirmed that the noise reflectors 10 and 10S of Examples 1 and 2 reduce the noise level of the sound of the frequency with the highest noise level.

[0071] In addition, it can be seen that in the noise reflector 10T of Comparative Example 1, there is a region in the frequency band 800 to 1250 [Hz] where the noise level is higher than that of Comparative Example 2. Therefore, it can be confirmed that the structure of the sound reflecting surface that causes the engine sound to go downward is preferably a structure that is inclined downward as it moves away from the engine 95 in the lateral direction, rather than a vertical wall facing the side opening 92C.

[0072] [Second embodiment]

[0073] exist Fig.10 , 11 2 shows a noise reflector 10V according to a second embodiment of the present disclosure. Hereinafter, only the differences between the noise reflector 10V and the noise reflector 10 according to the first embodiment will be described, and duplicate descriptions of the common configurations will be omitted.

[0074] In the vehicle 90V of the present embodiment, the noise reflector 10V is formed integrally with the fender lining 22V. Fig.11 As shown, in the fender lining 22V of this embodiment, the lower end of the inner wall 22B is located in the middle of the arc wall 22A in the vertical direction, and the two sides of the lower end surface of the inner wall 22B sandwiching the notch 23 are in the same plane and extend horizontally. Fig.10As shown in FIG. 1 , the lower end of the inner wall 22B protrudes downward from the front side beam 20 and is located above the drive shaft 31 and the tie rod 32 and faces the side opening 92C. In addition, a pair of sound reflection plates 11 are overlapped on the portions of the inner wall 22B facing the side opening 92C on both sides of the notch 23. Hereinafter, the portions of the inner wall 22B protruding downward from the front side beam 20 on both sides of the notch 23 are referred to as a pair of extended wall portions 18. Fig.11 As shown, the lower end of the sound reflecting plate 11 is connected to the lower end of the extended wall portion 18 via an integrated hinge 40 .

[0075] That is, in this embodiment, the noise reflector 10V is composed of the sound reflecting plate 11, the integrated hinge 40 and the extended wall portion 18, and the noise reflector 10V is arranged in a front-to-back manner so as to sandwich the notch 23 of the inner wall 22B of the fender lining 22V. In addition, the noise reflector 10V does not have the mounting plate portion 12 of the noise reflector 10 of the first embodiment. It should be noted that the noise reflector 10V also does not have the pair of side protrusions 14 and the pair of partition protrusions 15 of the noise reflector 10 of the first embodiment.

[0076] In addition, a pair of mounting holes 11B are provided on the upper portion of the sound reflecting plate 11. Fig.10 As shown, each mounting hole 11B has a countersunk structure with the lower surface side countersunk, and a seat portion 11D protrudes from the upper opening edge of the mounting hole 11B. The sound reflecting plate 11 is fixed to the lower surface of the front side beam 20 by a fastening member B (such as a bolt, nut, rivet, screw, or pin) passing through the mounting hole 11B.

[0077] It should be noted that the fender lining 22V of the present embodiment is an injection molded product of an olefin-based thermoplastic resin such as polypropylene or polyethylene, but may also be a vacuum molded product. Furthermore, the fender lining 22V is not limited to being fixed to the front side member 20 by a fastening member, but may also be fixed by an adhesive.

[0078] The noise reflector 10V of this embodiment is formed integrally with the fender lining 22V, but the two components of the sound reflecting plate 11 and the extended wall portion 18 are connected via an integrated hinge 40, so the two components having different demolding directions when in use are demolded in the same direction during molding and are integrally molded. Furthermore, after molding, the two components can be set to the configuration when in use by rotating the two components around the integrated hinge 40. In this way, since the two components originally having different demolding directions can be demolded in the same direction and integrally molded, the manufacturing cost can be reduced.

[0079] [Third Embodiment]

[0080] In the vehicle 90W of this embodiment, although the noise reflector 10V of the second embodiment is formed integrally with the fender lining 22W, the structure thereof is different. Fig.12 As shown, the noise reflector 10W of this embodiment includes a curved protrusion 19 that is curved from the lower end of the inner wall 22B and overlaps the lower surface of the front side beam 20. The sound reflecting plate 11 is connected to the front end of the curved protrusion 19 via an integral hinge 40.

[0081] Furthermore, the bent protrusion 19 has a pair of mounting holes 19B formed at positions opposite to the pair of mounting holes 11B of the sound reflecting plate 11, and the bent protrusion 19 and the sound reflecting plate 11 are fixed to the front side beam 20 by the fastening member B passing through these mounting holes 11B and 19B. The bent protrusion 19, the integrated hinge 40, and the sound reflecting plate 11 constitute a noise reflector 10W.

[0082] [Other embodiments]

[0083] (1) In the noise reflector 10 of the first embodiment, the interval between the sound reflecting surface 11A and the pair of partitioning protrusions 15 is approximately the same as the radius of curvature of the sound reflecting surface 11A, but may be larger or smaller than the radius of curvature. In addition, the partitioning protrusion 15 may not be provided, or one partitioning protrusion 15 or three or more partitioning protrusions 15 may be provided.

[0084] (2) In the noise reflector 10 of the first embodiment, the pair of side protruding walls 14 is provided, but the pair of side protruding walls 14 may not be provided.

[0085] (3) In the first embodiment, in the engine room 93 of the vehicle 90 having the engine 95 mounted at the front, the noise reflector 10 is provided on the front side beam 20 extending in the front-rear direction. However, the vehicle 90 may be provided with the engine 95 other than at the front and the side beam extending over the substantially entire range of the front-rear direction of the vehicle 90 is provided with the noise reflector 10.

[0086] (4) The noise reflectors 10 , 10V, and 10W in the above-described embodiment are provided so as to face substantially the entire upper portion of the side opening 92C, but may be provided so as to face a portion of the upper portion of the side opening 92C.

[0087] In the first embodiment, three noise reflectors 10 are provided, but the number of noise reflectors 10 may be two or less. In addition, four or more noise reflectors 10 may be provided in accordance with the width of the side opening 92C in the front-rear direction.

[0088] (5) In the above embodiment, the sound reflecting surface 11A of the noise reflector 10, 10V, 10W is an arc surface, but it can also be composed of a flat surface that faces the side opening 92C and tilts downward as it moves away from the engine 95 in the lateral direction (see Figure 7 (B)). The flat surface is preferably configured with an inclination angle of 40 to 50 [DEG] relative to the vertical direction and a dimension of 20 to 30 [mm] in the vertical direction. Even if such a structure is adopted, it can be Fig. 9 As shown in Example 2, the noise level in the frequency band of 800 to 1250 [Hz] is reduced.

[0089] At this time, the sound reflecting plate 11 may be connected to the front end of the curved protrusion 19 via the integrated hinge 40 as in the third embodiment, and the base portion 11D provided in the mounting hole 11B of the sound reflecting plate 11 may be brought into contact with the curved protrusion 19 to fix the inclination angle of the sound reflecting surface 11A. Fig.13 As shown, the lower end of the inner wall 22B is bent at two locations to form a curved protrusion 19X and a sound reflecting plate 11X, and a rib 41 is provided to connect the lower surface of the curved protrusion 19X and the outer surface of the sound reflecting plate 11X to each other, thereby fixing the inclination angle of the sound reflecting surface 11A.

[0090] (6) In the second and third embodiments, the noise reflectors 10V and 10W are formed integrally with the fender linings 22V and 22W, but the noise reflector 10Y may be formed as a single body and fixed to the inner wall 22B of the fender lining 22Y, as in the first embodiment. For example, as shown in FIG. 14(A), the lower end of the inner wall 22B of the fender lining 22Y may be extended downward from the lower surface of the front side member 20, and the mounting plate portion 12 of the noise reflector 10Y may overlap the extended portion.

[0091] 14 (B) as shown, the lower end of the inner wall 22B of the fender lining 22Z is ​​bent and overlapped with the lower surface of the front side member 20, and the mounting plate portion 12 of the noise reflector 10Z is mounted on the overlapping portion.

[0092] (7) In the above embodiment, the embodiment is applied to the vehicle 90 including the engine 95 , but the embodiment may also be applied to an electric vehicle including a motor or a hybrid vehicle including a motor and an engine.

Claims

1. A noise reflector that reduces engine sound that passes under a side member of a vehicle and leaks to the side of the vehicle, wherein: The noise reflector is a resin molded product integrally provided with a mounting plate portion and a sound reflecting plate, wherein the mounting plate portion is fixed to the lower surface of the side beam, and the sound reflecting plate is inclined relative to the vertical direction in a manner that it tends to be downward as it moves away from the engine to the side. The surface of the sound reflecting plate opposite to the mounting plate portion serves as a sound reflecting surface that receives engine sound and reflects the engine sound downward to interfere with the engine sound passing under the side member.

2. The noise reflector according to claim 1, wherein: The sound reflecting surface is an arc surface with a curvature radius of 20 to 30 mm and a circumference of 30 to 50 mm.

3. The noise reflector according to claim 1, wherein: The sound reflecting surface is a flat surface having an inclination angle of 40 to 50 DEG with respect to the up-down direction and a dimension of 20 to 30 mm in the up-down direction.

4. The noise reflector according to claim 1, wherein: The noise reflector includes a pair of side protrusion walls that protrude from both ends of the sound reflecting surface in the front-rear direction of the vehicle and face each other in the front-rear direction.

5. The noise reflector according to claim 1, wherein: The noise reflector includes a partition protrusion wall that protrudes from a midway position of the sound reflecting surface in the front-rear direction of the vehicle and partitions the sound reflecting surface in the front-rear direction.

6. A fender lining having an inner sidewall overlapping an outer side of a side member of a vehicle, wherein: The fender lining is provided with a noise reflector at the lower end of the inner side wall. The noise reflector reduces the engine sound that passes under the side member of the vehicle and leaks to the side of the vehicle. The noise reflector has a sound reflecting surface, which is arranged on the lower side of the lower surface of the side beam and is inclined relative to the vertical direction in a manner that tends to be downward as it moves away from the engine to the side, and the noise reflector reflects the engine sound received by the sound reflecting surface downward to interfere with the engine sound passing under the side beam. The fender lining has a notch extending from the lower end of the inner wall to the upper surface of the fender lining and dividing the inner wall into two parts at the front and rear to accommodate the shock absorber. The noise reflectors are arranged in a front-to-back manner with the notch interposed therebetween.

7. A fender lining having an inner sidewall overlapping an outer side of a side member of a vehicle, wherein: The fender lining is provided with a noise reflector at the lower end of the inner side wall. The noise reflector reduces the engine sound that passes under the side member of the vehicle and leaks to the side of the vehicle. The noise reflector has a sound reflecting surface, which is arranged on the lower side of the lower surface of the side beam and is inclined relative to the vertical direction in a manner that tends to be downward as it moves away from the engine to the side, and the noise reflector reflects the engine sound received by the sound reflecting surface downward to interfere with the engine sound passing under the side beam. The noise reflector comprises: a bent protrusion, which is bent from the lower end of the inner wall and overlaps with the lower surface of the side beam; and a sound reflecting plate, which is connected to the front end of the bent protrusion via an integrated hinge and is bent toward the lower side of the lower surface of the bent protrusion with the integrated hinge as a fulcrum, and one of the surface and the back of the sound reflecting plate becomes the sound reflecting surface.

8. A fender lining having an inner sidewall overlapping an outer side of a side member of a vehicle, wherein: The fender lining is provided with a noise reflector at the lower end of the inner side wall. The noise reflector reduces the engine sound that passes under the side member of the vehicle and leaks to the side of the vehicle. The noise reflector has a sound reflecting surface, which is arranged on the lower side of the lower surface of the side beam and is inclined relative to the vertical direction in a manner that tends to be downward as it moves away from the engine to the side, and the noise reflector reflects the engine sound received by the sound reflecting surface downward to interfere with the engine sound passing under the side beam. The noise reflector comprises: an extended wall portion, which extends downward from the inner wall and protrudes downward from the lower surface of the side beam; and a sound reflecting plate, which is connected to the lower end of the extended wall portion via an integrated hinge and is bent toward the engine side of the extended wall portion with the integrated hinge as a fulcrum, and one of the surface and the back surface of the sound reflecting plate becomes the sound reflecting surface.

9. The fender lining according to claim 8, wherein: The sound reflecting plate is formed with a mounting hole, through which a fastening member for fixing to the side beam passes.

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