JP5523616B2 - Engine undercover for vehicles - Google Patents

Description

  The present invention relates to a vehicular engine undercover having a hollow sound absorbing chamber.

  Conventionally, as shown in FIG. 7, a plate-like engine under cover 70 is provided from the lower side of the vehicle engine 81 to the lower side of the radiator 83 in order to reduce noise caused by the vehicle engine. Reference numeral 88 denotes a bumper in front of the radiator. However, in the engine under cover 70, the air that has passed through the radiator 83 is heated in the engine room 80 and passes through the gap between the lower end 83a of the radiator and the engine under cover 70, that is, on the front side of the radiator 83, that is, There is a problem in that the combustion efficiency of the engine is lowered because it goes to the bumper 88 side and is further sucked into the engine 81 through an intake duct (not shown).

  Further, in FIG. 7, a protrusion 75 is formed on the upper surface of the engine under cover 70 in the vicinity of the front or rear of the radiator 83 and higher than the height of the bottom surface of the radiator, and hot air from the engine 81 side passes below the radiator 83. There has been proposed an engine undercover that prevents the air from passing around to the bumper 88 (Patent Document 1). However, in the engine under cover provided with the projecting portion 75, the lower end of the radiator 83 may collide with the upper surface of the hard engine under cover and damage the radiator 83 when the vehicle rides on the curb. .

  In order to improve sound absorption, an engine under cover 90 made of a plastic blow molded body in which a plurality of hollow sound absorbing chambers 91 are formed on the upper surface is proposed as shown in FIGS. Reference 2). In addition, the code | symbol 95 in FIG.8 and FIG.9 is an attaching part to a vehicle. However, the engine under cover 90 having the sound absorbing chamber 91 has a problem that hot air of the engine flows around the bumper through the gap between the lower end of the radiator and the engine under cover. Further, in the blow molding, when the convex portion is generally formed, the top surface (upper surface) and the side wall are thinned. Therefore, as shown in FIG. When stacked, due to the weight of the upper engine under cover 90A, the lower engine under cover 90 has a problem that a part of the sound absorbing chamber 91 is crushed and the sound absorbing effect of the sound absorbing chamber 91 is reduced.

Japanese Utility Model Publication No. 61-179118 JP 2002-29330 A

  The present invention has been made in view of the above points, and even when the lower end of the radiator is pressed by the engine under cover, damage to the radiator can be suppressed. Further, when the engine under covers are stacked, a sound absorbing chamber is provided. An object of the present invention is to provide a vehicular engine undercover that can prevent crushing.

  According to a first aspect of the present invention, there is provided an engine undercover for a vehicle comprising a blow-molded body which is disposed over a lower part of an engine of a vehicle and a lower part of a radiator in front of the engine, and a plurality of raised hollow sound absorbing chambers are formed on an upper surface. In the upper surface of the engine under cover, a radiator position hollow protrusion projecting higher than the sound absorption chamber toward the lower end of the radiator is formed at a position below the radiator, and more than the radiator position hollow protrusion. A stacking support hollow projection is formed to project upward on the engine side, and the stacking support hollow projection is formed between the stacking support hollow projection and the radiator position hollow projection. The height is made higher than that.

  According to a second aspect of the present invention, in the first aspect, the stacking support hollow protrusion is formed to have a larger area than any of the sound absorbing chambers located on the engine side of the radiator position hollow protrusion. And The “area” means the area of the upper surface (ceiling portion) of the stacking support hollow projection for the stacking support hollow projection, while the upper surface (ceiling portion) of the sound absorption chamber is used for the sound absorption chamber. ).

  According to the first aspect of the present invention, even if the lower end of the radiator is pressed by the radiator position hollow protrusion, the radiator position hollow protrusion is hollow, so that the deformation of the radiator position hollow protrusion is relatively easy. In addition, since it has buffering properties, damage to the lower end of the radiator can be prevented. Furthermore, when the engine undercover of the present invention is stacked, the upper end of the sound absorbing chamber does not contact the lower surface of the other engine undercover located above due to the presence of the stacking support hollow protrusions. There is no possibility that the chamber will be crushed, and the sound absorption is not impaired. In addition, since the stacking support hollow protrusions are not formed for the purpose of absorbing sound, even if the upper part of the stacking support hollow protrusions is crushed by the stacking of the engine undercover, the sound absorption of the engine undercover There is no risk of damage.

  According to the second aspect of the present invention, since the thickness of the wall portion and the ceiling portion forming the stacking support hollow protrusion is thicker than the thickness of the sound absorbing chamber, The supporting hollow protrusion is not easily crushed. In addition, when the area of a protrusion is enlarged in blow molding, it is a well-known matter that the wall thickness of a protrusion and the plate | board thickness of a ceiling part will become thick.

It is a perspective view of the engine undercover concerning the 1st example of the present invention. It is 2A-2A cross section and 2B-2B expanded sectional drawing of FIG. It is sectional drawing which shows the stacking state of the engine undercover of 1st Example. It is a perspective view of the engine undercover concerning the 2nd example of the present invention. FIG. 5 is a sectional view taken along line 5-5 in FIG. 4. It is sectional drawing which shows the stacking state of the engine undercover of 2nd Example. It is the schematic which shows the use condition of the conventional engine undercover. It is a perspective view of the engine undercover which consists of a conventional blow molding. It is 9-9 sectional drawing of FIG. It is sectional drawing which shows the lamination | stacking state of the engine undercover which consists of a conventional blow molded object.

  The engine undercover 10 of the first embodiment shown in FIGS. 1 and 2 is made of a plastic blow-molded body formed by known blow molding, and is similar to the engine undercover shown in FIG. And below the radiator 83 in front of the engine 81. The engine under cover 10 of the present embodiment is formed of a hollow plate-like body, and has a size close to the back side of the bumper in front of the radiator 83 from below the engine 81 and below the radiator 83.

On the upper surface 11 of the engine under cover 10, a hollow sound absorbing chamber 15 bulging upward, a radiator position hollow protrusion 19, a stacking support hollow protrusion 23, and a mounting protrusion 28 are formed. .
The sound absorbing chamber 15 is provided to increase the sound absorbing property of the engine undercover 10 and is provided in a plurality at predetermined positions while avoiding the radiator position hollow protrusion 19. The sound absorbing chamber 15 has a convex hollow shape composed of a side surface and an upper surface, and the shape, size, and number are determined in consideration of sound absorbing properties.

  The radiator position hollow protrusion 19 protrudes upward toward the lower end 83a of the radiator 83 at a position below the radiator 83, and has a jetty shape along the width direction W of the under cover 10 corresponding to the width direction of the vehicle. Is formed. In the present embodiment, the radiator position hollow protrusion 19 is set to a height higher than that of the sound absorbing chamber 15, and the upper surface 20 is set to a position in contact with or close to the lower end 83 a of the radiator 83. In the engine under cover 10, the front side of the radiator position hollow protrusion 19 is the bumper side 13, while the rear side of the radiator position hollow protrusion 19 is the engine side 14. Further, in the present embodiment, attachment holes 21 and 21 to the vehicle body are formed at both ends in the width direction W of the radiator position hollow protrusion 19.

  At the upper part of the radiator position hollow protrusion 19, a hot air sneaking prevention protrusion 27 is formed at a position on the engine side 14 with respect to the radiator 83 at a lower end 83 position of the radiator and an upper end position higher than the sound absorbing chamber 15. Yes. Although the height from the lower end 83 position of the said radiator in the said hot-air rounding prevention protrusion 27 is determined suitably, about 1-5 cm is mentioned, for example. The hot air sneaking prevention protrusion 27 is preferably provided over the entire length between both ends of the radiator position hollow protrusion 19, but may be provided partially.

  The stacking support hollow projection 23 is formed to project upward at a position on the engine side 14 with respect to the radiator position hollow projection 19. The stacking support hollow protrusion 23 is formed to be higher in height than the sound absorbing chamber 151 formed between the stack support hollow protrusion 23 and the radiator position hollow protrusion 19, and is shown in FIG. 3. As described above, when another engine undercover 100 is placed on the stacking support hollow projection 23 and the radiator position hollow projection 19, the sound absorbing chamber 15 (stacking support hollow projection 23 and radiator is disposed). A stack support hollow so that the upper end of the sound absorbing chamber 151 between the hollow projections 19 is positioned below the other engine under cover 100 and does not come into contact with the lower surface 101 of the other engine under cover 100. The position and number of the protrusions 23 are determined. In particular, the engine side 14 of the engine undercover 10 is farthest from the radiator position hollow protrusion 19 (that is, the most from the radiator hollow protrusion 19 in the direction orthogonal to the width direction W of the undercover 10 on the engine side). It is preferable to provide the stacking support hollow projection 23 at a position in the width direction W with respect to the sound absorbing chamber 152 at a position away from the radiator chamber, or at a position further away from the radiator position hollow projection 19 (that is, a rear position). . Moreover, it is preferable to provide two or more stacking support hollow protrusions 23 in order to stabilize the upper engine undercover when the engine undercover 10 is stacked.

  The stacking support hollow projection 23 has a larger area than any of the sound absorbing chambers 151 located on the engine side than the radiator position hollow projection 19. For this reason, the thickness of the wall and ceiling forming the stacking support hollow projection 23 is thicker than the thickness of the sound absorbing chamber 151, and when the engine undercover is stacked, the stacking support hollow projection The part 23 is not easily crushed.

  The attachment projection 28 is used when the engine undercover 10 is attached to the vehicle together with the attachment holes 21 and 21 to the vehicle body of the radiator position hollow projection 19. The mounting projection 28 has a cylindrical shape having an upper surface 29, and a mounting hole 30 is formed in the upper surface 29.

  The engine undercover 10 of the first embodiment is provided with the hot air wrap prevention protrusion 27 at a position on the engine side 14 in the upper portion of the radiator position hollow protrusion 19. It may be provided on the bumper side 13 opposite to the side 14.

  4 and 5 show the engine undercover 10A of the second embodiment in which the hot air sneaking prevention protrusion 27A is provided on the bumper side 13A in the upper part of the radiator position hollow protrusion 19A. In the engine under cover 10A of the second embodiment, the configuration other than the position of the hot air sneaking prevention protrusion 27A is the same as that of the engine under cover 10 of the first embodiment. FIG. 6 shows a state in which the engine undercovers 10A of the second embodiment are stacked. 4 to 6, reference numeral 11A is the upper surface of the engine under cover 10A, 14A is the engine side, 15A is the sound absorbing chamber, 20A is the upper surface of the radiator position hollow protrusion 19A, and 21A is the radiator position hollow protrusion 19A. The mounting hole 23A is a stacking support hollow projection, and 28A is a mounting projection. Reference numeral 100A denotes another engine under cover placed on the stacking support hollow protrusion 23A and the hot air sneaking prevention protrusion 27A, 101A denotes a lower surface of the other engine under cover 100A, and 151A denotes a stack support. The sound absorption chamber formed between the hollow projection 23A and the radiator position hollow projection 19A is shown.

  2 and 5, the engine undercover 10, 10 </ b> A has the upper side of the radiator position hollow protrusions 19, 19 </ b> A in contact with or close to the lower end 83 a of the radiator 83. 14A is mounted below the engine 81 and the radiator 83 so that the upper ends of the hot air sneaking prevention protrusions 27 and 27A are higher than the lower end 83a of the radiator 83.

  The engine undercovers 10 and 10A attached to the vehicle are configured so that the hot air on the engine 81 side is heated at the lower end 83a of the radiator 83 by hot air sneaking prevention protrusions 27 and 27A formed at the upper portions of the radiator position hollow protrusions 19 and 19A. And the engine under cover 10, 10 </ b> A can be prevented from entering the bumper side 13, 13 </ b> A opposite to the engine 81. Further, even if the radiator lower end protrusion 83, 19A is pressed by the upper portion of the radiator position hollow protrusions 19, 19A, the radiator position hollow protrusions 19, 19A are hollow, so that the deformation is relatively easy. The deformation can absorb the impact and prevent the radiator lower end 83a from being damaged.

  As shown in FIGS. 3 and 6, the engine undercovers 10 and 10A have other identical engine undercovers 100 on the stacking support hollow protrusions 27 and 27A and the hot air sneaking prevention protrusions 27 and 27A. , 100A is placed, the upper ends of the sound absorbing chambers 15, 15A are positioned below the other engine under covers 100, 100A and do not contact the lower surfaces 101, 101A of the other engine under covers. There is no possibility that 15A and 15A are crushed, and the sound absorption is not impaired.

10, 10A Engine under cover 11.11A Engine under cover upper surface 13, 13A Bumper side 14, 14A Engine side 15, 15A Sound absorption chamber 19, 19A Radiator position hollow protrusion 23, 23A Stacking support hollow protrusion,
27,27A Hot air sneak prevention protrusion

Claims (2)

In an engine undercover for a vehicle comprising a blow molded body that is disposed over a lower part of a vehicle engine and a lower part of a radiator in front of the engine, and a plurality of raised hollow sound absorbing chambers are formed on the upper surface.
On the upper surface of the engine under cover, there is formed a radiator position hollow protrusion (19) projecting higher than the sound absorbing chamber (15) toward the lower end of the radiator at a position below the radiator, and the radiator position hollow A stacking support hollow protrusion (23) is formed to protrude upward from the protrusion (19) on the engine side,
The stacking support hollow protrusion (23) is higher in height than the sound absorbing chamber (151) formed between the stack support hollow protrusion and the radiator position hollow protrusion. Engine under cover for vehicles.   The stacking support hollow protrusion (23) has a larger area than any of the sound absorbing chambers (151) located on the engine side of the radiator position hollow protrusion (19). Item 2. The engine undercover for a vehicle according to Item 1.

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