JP2019105168A - Inlet duct structure - Google Patents

Abstract

To make a radiator support cover 1 common in use irrespective of a model of an engine being a use object, in an inlet duct structure for connecting intake ports 35, 45 of inlet ducts 3, 4 to a single opening window 11 which is arranged at the radiator support cover 1.SOLUTION: Inlet ducts 3, 4 are prepared at a plurality of kinds of engines, respectively, which are different from each other in rated intake amounts. A plurality of the inlet ducts 3, 4 are formed into the same contour shapes at their intake ports 35, 45, and opening areas of the intake ports 35, 45 are set so as to differ from each other by adjusting an amount for hanging out, to the inside, an inner face (41d, 42d, 41e or 42e) of at least one wall part (41b, 42b, 41c or 42c) out of peripheral walls (wall parts in vertical and left-and-right directions) surrounding the intake ports 35, 45 of the inlet ducts 3, 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inlet duct structure in which an inlet of an inlet duct is connected to a single opening window provided in a radiator support cover.

  For example, Patent Document 1 discloses an intake device configured to take external air into an air cleaner box via a cool air duct and an inlet duct. The inlet of the cool air duct is formed in an elliptical shape.

JP, 2017-155671, A

  The intake member such as the cool air duct shown in Patent Document 1 has the shape of the intake port for each type of engine, since the shape and opening area of the intake port are exclusively designed for each type of engine to be used. And the opening area is different.

  Therefore, for example, when the intake member is installed in a vehicle body, for example, when the intake port of the intake member is connected to an opening window provided in a radiator support cover, for example, the shape of the opening window Since it is necessary to match the opening area to the intake port of the intake member which differs depending on the model of the engine, the shape and the opening area of the opening window also need to be specially designed for each intake port of the intake member.

  For this reason, when several types of engines of different types are mounted on the vehicle body, it becomes necessary to prepare several types of radiator support covers, resulting in an increase in the manufacturing cost of the vehicle.

  On the other hand, in order to reduce the manufacturing cost of the vehicle, the shape and the opening area of the intake port of the intake member are made one type regardless of the type of the engine, and the opening window of the radiator support cover is made one Is considered.

  However, in this case, for example, if the shape and opening area of the intake port are set on the assumption that the intake port is used for an engine having a large intake capacity, the intake noise is deteriorated when the intake member is used for an engine having a small intake capacity. There is a risk of Although it is conceivable to add a sound absorbing material to the air intake member as a countermeasure, it leads to an increase in cost.

  In view of such circumstances, the present invention provides an inlet duct structure in which an inlet of an inlet duct is connected to a single opening window provided in a radiator support cover, regardless of the type of engine to be used. The purpose is to make it possible to share

  The present invention is an inlet duct structure in which an inlet of an inlet duct is connected to a single opening window provided in a radiator support cover, and the inlet duct is prepared for each of a plurality of types of engines having different rated intake amounts. The external shape of the respective inlets of the plurality of inlet ducts is the same, and the opening area of each of the inlets is such that the inner surface of the peripheral wall portion of each inlet duct projects inward. It is characterized in that it is set differently by adjusting.

  In this configuration, a plurality of inlet ducts having different opening areas of the intake ports can be used properly for each rated intake capacity of the engine mounted on the vehicle body, and the inlet ducts of all types of inlet ducts are one type. It is possible to attach to a single open window in the radiator support cover.

  That is, since the radiator support cover can be used in common regardless of the rated intake amount of the engine mounted on the vehicle body, it is possible to contribute to the reduction of the manufacturing cost of the vehicle.

  Moreover, since the opening area of each intake port of each inlet duct is set to be different depending on the rated intake capacity of the engine, noise and vibration accompanying intake performance and intake can be achieved without adding extra parts. Etc. can be compatible to enhance both NV (Noise Vibration) performance and the like.

  The inlet duct structure according to the present invention can share the radiator support cover regardless of the type of engine to be used. This can contribute to reducing the manufacturing cost of the vehicle.

It is a top view showing one embodiment of the inlet duct structure concerning the present invention. It is the figure which looked at the (2)-(2) line cross section of FIG. 1 from the arrow direction. It is the figure which looked at the (3)-(3) line cross section of FIG. 1 from the arrow direction. It is a perspective view which shows a 1st inlet duct. It is a perspective view which shows a 2nd inlet duct. It is a disassembled perspective view which shows the air inlet side of a 1st inlet duct. It is a disassembled perspective view which shows the inlet-port side of a 2nd inlet duct. FIG. 5 is a plan view of an inlet side of a first inlet duct. It is a top view by the side of the air inlet of a 2nd inlet duct. It is the figure which looked at the (10)-(10) line cross section of FIG. 8 from the arrow direction. It is the figure which looked at the (11)-(11) line cross section of FIG. 9 from the arrow direction. FIG. 10 is a perspective view showing another embodiment of the second inlet duct. It is a disassembled perspective view which shows the inlet-port side of the 2nd inlet duct shown in FIG. It is a top view by the side of the inlet of the 2nd inlet duct of FIG. It is the figure which looked at the (15)-(15) line cross section of FIG. 14 from the arrow direction. FIG. 16 is a view corresponding to FIGS. 11 and 15 in still another embodiment of the second inlet duct. It is an embodiment which changed a part of 2nd inlet duct shown in FIG. 16, and is a figure corresponding to FIG. FIG. 18 is a view corresponding to FIG. 14 in the embodiment shown in FIG. 17; It is the figure which looked at the (19)-(19) line cross section of FIG. 18 from the arrow direction. FIG. 20 is a view showing still another embodiment of the second inlet duct shown in FIG. 19;

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the attached drawings.

  1 to 11 show an embodiment of the present invention. In the figure, 1 is a radiator support cover, 2 is an air cleaner, 3 is a first inlet duct, and 4 is a second inlet duct. Further, Fr indicates the front side of the vehicle, Lh indicates the left side of the vehicle, Rh indicates the right side of the vehicle, and Up indicates the upper side of the vehicle.

  The first inlet duct 3 and the second inlet duct 4 communicate the opening window 11 of the radiator support cover 1 with the air cleaner 2.

  As shown in FIG. 3, the opening window 11 is opened obliquely upward by the step between the upper portion 12 and the lower portion 13 of the radiator support cover 1.

  A cylindrical portion 14 is provided on the rear side of the opening window 11 so as to protrude toward the rear of the vehicle. The first and second inlet ducts 3 and 4 are attached to the rear end of the cylindrical portion 14 so that the air inlets 35 and 45 communicate with the inner hole of the cylindrical portion 14. ing.

  The first inlet duct 3 and the second inlet duct 4 are divided into upper 31 and lower 41 and lower 32 and 42 in this embodiment, respectively, and they are configured to be coupled.

  This connection is achieved by the locking portions 33 and 43 provided on the upper 31 and 41 sides of the first inlet duct 3 and the second inlet duct 4, and the lower portions 32 of the first inlet duct 3 and the second inlet duct 4. , 42 side and the to-be-locked part 34, 44 provided.

  As shown in FIGS. 10 and 11, the locking portions 33 and 43 are formed in a tongue shape, and the locked portions 34 and 44 have locking portions 33 and 43 in the tongue shape, respectively. It is made into the recessed part inserted and latched.

  In contrast to the above, the locked portions 34 and 44 may be provided on the upper 31 and 41 sides, and the locking portions 33 and 43 may be provided on the lower 32 and 42 sides.

  The open ends of the air inlets 35 and 45 of the first inlet duct 3 and the second inlet duct 4 are formed to extend radially outward as shown in FIGS. 4 to 7. There is. Since the opening end is formed on both the upper 31 and 41 and the lower 32 and 42, the opening end of the upper 31 and 41 is denoted by 31a and 41a, and the opening end of the lower 32 and 42 is Reference numerals 32a and 42a are attached.

  Mounting pieces 36 and 46 for attaching to the radiator support cover 1 are provided on the lowers 32 and 42 of the first inlet duct 3 and the second inlet duct 4, respectively.

  The outer shapes of the open end portions 31a, 32a, 41a, 42a of the inlets 35, 45 of the first inlet duct 3 and the second inlet duct 4 are the same, but the inlets 35 of the first inlet duct 3 The opening area is set to be suitable for use with an engine with a large intake capacity, while the opening area of the intake 45 of the second inlet duct 4 is suitable for use with an engine with a small intake capacity. It is set.

  Specifically, the opening area of the air inlet 45 of the second inlet duct 4 is set to be smaller than the opening area of the air inlet 35 of the first inlet duct 3.

  In order to do so, the left side wall portions 41b and 42b and the right side wall portions 41c and 42c on the intake port 45 side of the second inlet duct 4 have a hollow structure, and the inner surfaces 41d and 42d and the respective left side wall portions 41b and 42b The inner surfaces 41e and 42e of the right side wall portions 41c and 42c respectively project a predetermined amount inward. The projecting inner surfaces 41d, 42d, 41e and 42e are provided in the upper 41 and the lower 42, respectively.

  On the other hand, the left and right side wall portions (reference numeral omitted) on the intake port 35 side of the first inlet duct 3 are not hollow, and the inner surfaces (reference numeral omission) of the left and right side wall portions are not protruded inward. That is, the inward projecting amounts of the inner surfaces of the left and right side wall portions on the intake port 35 side of the first inlet duct 3 are set to zero.

  In this way, the opening area of the air inlet 45 of the second inlet duct 4 is set to be smaller than the opening area of the air inlet 35 of the first inlet duct 3. In addition, the opening area of the inlet 45 of the 2nd inlet duct 4 can be changed by adjusting the said projection amount suitably.

  On the other hand, as described above, the outer shapes of the respective inlets 35, 45 of the first inlet duct 3 and the second inlet duct 4, that is, the outer shapes of the open end portions 31a, 41a, 32a, 42a of the respective inlets 35, 45. Can be mounted in a state in which both the first inlet duct 3 and the second inlet duct 4 are individually fitted in a single opening window 11 of one type of radiator support cover 1 It has become.

  As a result, one type of radiator support cover 1 can be used in common for both the vehicle body on which the engine with a large intake capacity is mounted and the vehicle body on which the engine with a small intake capacity is mounted. .

  The shapes of the body portions of the first inlet duct 3 and the second inlet duct 4 and the shapes of the openings on the air cleaner 2 side of the first inlet duct 3 and the second inlet duct 4 are formed to be different from each other.

  The reason is that the air cleaner 2 used in an engine with a large rated intake capacity to be used in the first inlet duct 3 and the air cleaner 2 used in an engine with a small rated intake capacity to be used in the second inlet duct 4 It needs to be specially designed. From the relationship, the shapes of the body of the first inlet duct 3 and the second inlet duct 4 and the shape of the opening on the air cleaner 2 side are individually designed in accordance with the respective air cleaners 2.

  By the way, in the second inlet duct 4, the coupling position between the inner surface 41d side of the left side wall portion 41b of the hollow structure of the upper 41 and the inner surface 42d side of the left side wall portion 42b of the hollow structure of the lower 42 The connection position between the inner surface 41e side of the right side wall 41c of the hollow structure and the inner surface 42e side of the right side wall 42c of the hollow structure of the lower 42 is two in total as shown by a circle of a dashed dotted line in FIG. It is considered four.

  As described above, in this embodiment, the first inlet duct 3 having a large opening area of the intake port 35 and the second inlet duct 4 having a small opening area of the intake port 45 according to the rated intake capacity of the engine mounted on the vehicle body To enable common use of the inlets 35 and 45 of both the first inlet duct 3 and the second inlet duct 4 to a single opening window 11 in one type of radiator support cover 1 ing.

  That is, since the radiator support cover 1 can be used in common regardless of the rated intake air amount of the engine mounted on the vehicle body, it is possible to contribute to the reduction of the manufacturing cost of the vehicle.

  Moreover, for the first and second inlet ducts 3 and 4, since the opening areas of the respective intake ports 35 and 45 are set to be different according to the rated intake air amount of the engine, extra parts are added Accordingly, it is possible to achieve both intake performance of both the first and second inlet ducts 3 and 4 and NV (Noise Vibration) performance such as sound and vibration accompanying intake.

  In addition, this invention is not limited only to the said embodiment, It is possible to change suitably within the range of a claim, and the range equivalent to the said range.

  (1) In the above embodiment, an example is described in which the opening of the intake port 45 of the second inlet duct 4 is disposed in the middle in the left-right direction of the vehicle, but the present invention is not limited thereto.

  For example, the opening of the intake port 45 of the second inlet duct 4 can be arranged to be offset to one of the left and right direction of the vehicle.

  For example, as shown in FIG. 12 to FIG. 15, the opening of the intake port 45 of the second inlet duct 4 can be arranged to be offset to the side away from the air cleaner 2.

  Specifically, the left side wall 41b of the upper 41 and the left side wall 42b of the lower 42 on the side of the intake port 45 of the second inlet duct 4 have a hollow structure, and the left side wall 41b of the upper 41 and the left side wall of the lower 42 Only the inner surfaces 41d and 42d of 42b are configured to protrude inward.

  On the other hand, the right side wall 41c of the upper 41 and the right side wall 42c of the lower 42 on the side of the intake port 45 of the second inlet duct 4 do not have a hollow structure, and the inner surfaces (symbols are omitted) of the right side walls 41c and 42c. I try not to let it project inside. That is, the amount of inward protrusion of the inner surface of the right side wall 41c of the upper 41 and the right side wall 42c of the lower 42 on the side of the intake port 45 of the second inlet duct 4 is set to zero.

  However, although not shown, only the inner surfaces (reference numerals omitted) of the right side wall 41 c of the upper 41 and the right side wall 42 c of the lower 42 are projected inward on the intake port 45 side of the second inlet duct 4. It is also possible.

  And the opening area of the inlet 45 of the 2nd inlet duct 4 can be changed by adjusting the said projection amount suitably.

  In this embodiment, in the second inlet duct 4, the connection position between the inner surface side of the left side wall portion 41b of the hollow structure of the upper 41 and the inner surface side of the left side wall portion 42b of the hollow structure of the lower 42 is one point in FIG. As shown by the dashed circle, it is two.

  As described above, since the number of coupling positions can be set to half that of the above embodiment, the effect of improving the assemblability when the upper 41 and the lower 42 are coupled can be obtained compared to the above embodiment.

  The other functions and effects are the same as those of the above-described embodiment, and thus the detailed description thereof will be omitted.

  (2) In the embodiment shown in FIGS. 12 to 15, an example is given in which the inner surface of one side wall portion of the upper 41 and the left and right side wall portions of the lower 42 of the second inlet duct 4 is protruded inward. However, the present invention is not limited to this.

  For example, as shown in FIG. 16, the inner surface of the region 422 of one half of the lower wall 421 of the lower 42 of the lower inlet 42 of the second inlet duct 4 can be configured to project upward on the upper 41 side. It is. Hereinafter, the area 422 is referred to as a projecting area.

  The inner surface of the upper wall portion 411 of the upper 41 is made to have the same shape as the upper 31 of the first inlet duct 3 so as to be used in common without projecting inward.

  Also in this case, the opening area of the air inlet 45 of the second inlet duct 4 can be changed by adjusting the amount of projection appropriately.

  The connection form of the upper portion 41 and the lower portion 42 of the second inlet duct 4 in this embodiment will be described.

  A locking portion 43 is provided on the upper wall portion 411 of the upper 41, and a locked portion 44 is provided on the overhanging region 422 of the lower wall portion 421 of the lower 42.

  The locking portion 43 is a pin projecting downward. The pin as the locking portion 43 is formed such that the tip end side of the shaft-like portion is formed wider than the other portions and is tapered. The locked portion 44 is a through hole.

  When the locking portion 43 formed of such a pin is inserted into the through hole which is the locked portion 44, the wide portion of the pin as the locking portion 43 is caught on the opening edge of the through hole as the locked portion 44. Becomes, I will not get out.

  In the embodiment shown in FIGS. 12 to 15, the left side wall portions 41b and 42b are hollow, and the connecting portion between the left side wall portion 41b and the upper wall portion of the upper 41 and the left side wall portion 42b and the upper side of the lower 42 are provided. Since the connecting portions with the wall portion are each broadened toward the base side, when the upper 41 and the lower 42 are molded of a synthetic resin, it is easy to generate sink marks on the base side, and the designability is improved. May decrease.

  On the other hand, in the case of this embodiment, since the overhanging region 422 in the lower wall 421 of the lower 42 has a certain thickness from the lower wall 421, the lower 42 is formed of synthetic resin. However, it becomes possible to suppress or prevent the occurrence of such sink marks as described above, and it becomes possible to avoid a decrease in design.

  The other functions and effects are the same as those of the above-described embodiment, and thus the detailed description thereof will be omitted.

  (3) An embodiment in which the coupling form of the upper 41 and the lower 42 of the second inlet duct 4 in the embodiment shown in FIG. 16 is changed will be described with reference to FIGS.

  For example, in the embodiment shown in FIG. 16, there is a possibility that a gap may be formed between the inner surface of the overhang region 422 in the lower wall 421 of the lower 42 of the second inlet duct 4 and the inner surface of the upper wall 411 of the upper 41. It can not be said that there is no.

  So, in this embodiment, the top plate portion of the overhanging region 422 in the lower wall portion 421 of the lower 42 of the second inlet duct 4 is curved so as to be recessed downward. The curved portion is referred to as a concave curved portion and denoted by reference numeral 423.

  The recess margin of the concave curved portion 423 is set to be larger than the length from the base of the pin as the locking portion 43 provided on the upper portion 41 of the second inlet duct 4 to the wide portion. As a result, the pin as the locking portion 43 of the upper 41 is inserted into the through hole as the locked portion 44 of the lower 42 and locked, thereby the concave curved portion 423 of the lower 42 shown in FIGS. It can be made to elastically bend as shown by a two-dot chain line.

  In such a state, the opening peripheral edge 424 of the concave curved portion 423 is the inner surface of the upper wall 411 of the upper 41 in the overhang region 422 due to the restoring force that the concave curved portion 423 attempts to elastically restore at all times. As a result, the upper 41 and the lower 42 are connected without any gap.

  As described above, in this embodiment, in addition to obtaining the same operation and effect as the embodiment shown in FIG. 16, the concern in the embodiment shown in FIG. 16 can be wiped out.

  (4) An embodiment in which a part of the second inlet duct 4 in the embodiment shown in FIG. 16 is changed will be described with reference to FIG.

  In this embodiment, the top plate portion of the overhanging region 422 in the lower 42 of the second inlet duct 4 has a corrugated shape in the longitudinal direction of the second inlet duct 4. On the top plate portion of the corrugated shape, two downward concave curved portions 423 a and 423 b are provided in the longitudinal direction of the second inlet duct 4.

  The recess margin of the concave curved portions 423 a and 423 b is set to be larger than the length from the base of the pin as the locking portion 43 provided on the upper 41 of the second inlet duct 4 to the wide portion. Thereby, the concave curved portions 423a and 423b of the lower 42 can be inserted into the through holes as the engaged portions 44 of the lower 42 and locked as shown in FIG. It can be made to elastically bend as shown by a dot-and-dash line.

  In such a state, the opening peripheral edge portions 424 of the two concave curved portions 423 a and 423 b are upper 41 in the overhang region 422 due to the restoring force that the concave curved portions 423 a and 423 b try to elastically restore at all times. As a result, the upper 41 and the lower 42 are coupled to each other without a gap.

  As described above, in this embodiment, in addition to obtaining the same operation and effect as the embodiment shown in FIG. 16, the concern in the embodiment shown in FIG. 16 can be wiped out.

  The present invention can be suitably used for an inlet duct structure in which an inlet of an inlet duct is connected to an opening window provided in a radiator support cover.

DESCRIPTION OF SYMBOLS 1 Radiator support cover 11 Opening window 12 steps upper part 13 steps lower part 14 Tubular part 2 air cleaner 3 inlet duct 31 upper
31a opening end 32 lower
32a open end portion 33 locking portion 34 locked portion 35 air inlet 36 mounting piece 4 second inlet duct 41 upper
41a open end
41b left side wall
41c right side wall
41d Inner surface of left side wall
41e Inner surface of the right side wall 42 Lower
42a open end
42b left side wall
42c right side wall
42d Inner surface of left side wall
42e Inner surface of right side wall 43 Locking portion 44 Locked portion 45 Air intake 46 Mounting piece

Claims (1)

An inlet duct structure connecting an inlet of an inlet duct to a single opening window provided in a radiator support cover,
The inlet duct is provided for each of a plurality of types of engines having different rated intake capacities,
The plurality of inlet ducts have the same outer shape of the respective inlets, and the opening area of each of the inlets adjusts the amount by which the inner surface of the peripheral wall portion of each inlet duct protrudes inward. The inlet duct structure is characterized by being set differently.

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