JP2010196643A - Device for guiding air currents caused by vehicle travel to intercooler in vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow engine intake air to be sufficiently cooled by an intercooler as a result of fully ensuring the supply quantity of air currents, caused by vehicle travel, to the intercooler by a device for guiding the air currents and besides allow the structure of the device to be prevented from becoming complicated even in doing this way and further to make it possible to excellently maintain the durability of the device. <P>SOLUTION: The air currents 8, caused by vehicle travel, introduced into a first air duct 12 are guided sequentially through the first air duct 12 and a second air duct 13 to the intercooler 7. In the lateral view (Fig.1) of a mid-course portion 16 in the longitudinal direction of the first air duct 12, an upper end of one duct wall 21, located at a side where the curvature radius of the first air duct 12 is smaller between the curvature radii of right and left duct walls 21, 22 in a cross-section of the second air duct 13, is bent toward an inner side of the second air duct 13, and a virtual extended surface 25 extending downwards along an inner surface of an opening 15 at the downstream end of the first air duct 12 is positioned between the bent piece 23 and an upper end of the duct wall 22 in the second air duct 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a traveling wind guide device to an intercooler in a vehicle for cooling engine air by traveling wind (air cooling).

  Conventionally, there is a traveling wind guide apparatus disclosed in Patent Document 1 below. According to this publication, the traveling wind guide device has an upstream end opening that opens toward the front of the vehicle body so as to introduce the traveling wind, and a downstream end opening that opens downward toward the intercooler side. In a side view of the midway portion in the longitudinal direction, the midway portion is bent upward in an arc shape, and extends upward from the intercooler to the vicinity of the downstream end opening of the first air duct. And a second air duct facing away from the downstream end opening of the first air duct, and a running wind introduced into the first air duct passes through the first and second air ducts in sequence. Guided to the intercooler.

  The intercooler is usually provided in a midway portion in the longitudinal direction of an intake pipe that connects the supercharger to the engine body in a supercharged engine. During operation of the engine, the intake air is compressed by the supercharger and then sucked into the engine body through the intake pipe, thereby obtaining a high output from the engine. By the way, due to the compression of the intake air, the intake air is adiabatically compressed and becomes high temperature. However, if the intake air is sucked into the engine body with the high temperature, the charging efficiency is reduced or knocking occurs, resulting in an output. Improvement tends to be hindered.

  Therefore, the intake air flowing through the intake pipe toward the engine body is cooled (air cooled) by heat exchange with the traveling wind by the intercooler. This prevents high-temperature intake air from being directly sucked into the engine body, improving the charging efficiency and preventing the occurrence of knocking, and obtaining a desired output.

  On the other hand, the intercooler is connected to the engine body via an intake pipe. For this reason, the intercooler vibrates with the engine by the operation of the engine. Here, assuming that the first and second air ducts are integrally connected to the intercooler, the first and second air ducts vibrate together with the engine and are unnecessarily large. Noise may occur.

  Therefore, as described above, by making the downstream end opening of the first air duct and the extended end opening of the second air duct face each other apart from each other, these first and second air ducts are separated from each other, and at least The first air duct is prevented from vibrating with the engine.

JP-A-10-184368

  By the way, as described above, when the downstream end opening of the first air duct and the extended end opening of the second air duct are opposed to each other, the gap between the downstream end opening and the extended end opening is between them. A gap is created. For this reason, when the traveling wind introduced into the first air duct flows toward the second air duct, a part of the traveling wind may leak to the outside through the gap. In this case, the supply amount of traveling wind to the intercooler tends to be insufficient, and there is a possibility that the cooling of the intake air by the intercooler becomes insufficient.

  Therefore, in the conventional technique, an elastic sealing material is provided so as to close the gap. However, when the sealing material is provided in this way, the number of parts of the traveling wind guide device increases accordingly, and the configuration becomes complicated, and the durability of the traveling wind guide device from the viewpoint of the life of the sealing material. May cause a decrease.

  The present invention has been made paying attention to the above situation, and an object of the present invention is to provide a sufficient supply amount of traveling wind to the intercooler by the traveling wind guide device. By ensuring that the engine intake air is sufficiently cooled, and even if this is done, the configuration of the traveling wind guide device will not be complicated, and the durability will be maintained well. is there.

In the first aspect of the invention, the upstream end opening 14 opens toward the front of the vehicle body 2 so as to introduce the traveling wind 8, and the downstream end opening 15 opens downward toward the intercooler 7 side. In a side view of the midway part 16 (FIG. 1), the midway part 16 is bent upward in an arc shape and from the intercooler 7 to the vicinity of the downstream end opening 15 of the first air duct 12. And a second air duct 13 having an extension end opening 18 facing away from the downstream end opening 15 of the first air duct 12, and traveling wind introduced into the first air duct 12. In the traveling wind guide device to the intercooler in the vehicle in which 8 is guided to the intercooler 7 through the first and second air ducts 12 and 13 in sequence,
In the side view (FIG. 1), of the left and right duct walls 21 and 22 in the cross section of the second air duct 13, the upper end portion of one duct wall 21 located on the side where the bending radius of the first air duct 12 is small Is bent toward the inner side of the second air duct 13, and the downstream end of the first air duct 12 is between the bent piece 23 and the upper end of the other duct wall 22 of the second air duct 13. A traveling wind guide device for an intercooler in a vehicle, wherein a virtual extension surface 25 extending downward along an inner surface of an opening 15 is positioned.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

According to the first aspect of the present invention, the upstream end opening opens toward the front of the vehicle body so as to introduce the traveling wind, the downstream end opening opens downward toward the intercooler side, and the side surface of the middle part in the longitudinal direction. In view, the first air duct whose midway portion is bent in an arc shape, and extends upward from the intercooler to the vicinity of the downstream end opening of the first air duct, and the extended end opening is the first air duct. A second air duct facing away from the downstream end opening of the air duct, and the traveling wind introduced into the first air duct is sequentially guided to the intercooler through the first and second air ducts. In the traveling wind guide device to the intercooler in the vehicle as described above,
In the side view, of the left and right duct walls in the cross section of the second air duct, the upper end portion of one duct wall located on the side where the bending radius of the first air duct is small is on the inner side of the second air duct. A virtual extension surface extending downward along the inner surface of the downstream end opening of the first air duct is positioned between the bent piece and the upper end of the other duct wall of the second air duct. ing.

  For this reason, the following effect arises. That is, when the traveling wind flows in the first air duct toward the second air duct, the traveling wind that flows along the inner surface of the first air duct on the side having the smaller bending radius becomes another traveling wind. In comparison, since the inertial force is small, the momentum of the traveling wind flowing from the first air duct into the second air duct tends to be weak. However, according to the above invention, the virtual extension surface extending downward along the inner surface of the downstream end opening of the first air duct is positioned on the inner side of the second air duct than the bent piece.

  For this reason, first, the traveling wind flowing from the first air duct into the second air duct is more likely to flow into the second air duct due to the presence of the space below the bent piece. . Therefore, the traveling wind sufficiently cools the engine intake air flowing through a part of the intercooler located on the side where the bending radius of the first air duct is small. Second, since the flow of the traveling wind is weak, a part of the traveling wind may collide with the upper surface of the intercooler and be reversed upward. However, the traveling wind reversed in this way is restricted from flowing upward by the lower surface of the bent piece. Therefore, the traveling wind is prevented from leaking outside through the gap, and the intake air flowing through a part of the intercooler is more sufficiently cooled.

  On the other hand, when the traveling wind flows in the first air duct toward the second air duct, the traveling wind flowing along the inner surface of the first air duct having the larger bending radius has a large inertial force. It will flow vigorously.

  For this reason, the traveling wind vigorously flows into the second air duct from the first air duct and also vigorously penetrates the other part of the intercooler located on the side where the bending radius of the first air duct is large. The intake air flowing through the other part of the intercooler is sufficiently cooled. Therefore, it is more reliably prevented that a part of the traveling wind leaks to the outside through the gap, and the intake air flowing through the other part of the intercooler is more sufficiently cooled.

  That is, according to the traveling wind guide device, intake air is sufficiently cooled by the entire intercooler. In addition, the sufficient cooling of the intake air closes the gap so as to prevent the traveling wind from leaking from the gap between the downstream end opening of the first air duct and the extended end opening of the second air duct. This is achieved without providing a sealing material. Therefore, as described above, even when the intake air is sufficiently cooled by the intercooler, the configuration of the traveling wind guide device is prevented from being complicated, and the life of the sealing material is not related. The durability is maintained well.

It is side surface sectional drawing of a driving | running | working wind guide apparatus. 1 is an overall perspective view of a vehicle.

  The present invention relates to a traveling wind guide device for an intercooler in a vehicle according to the present invention, in which a sufficient amount of traveling wind is supplied to the intercooler by the traveling wind guide device so that the engine air is sufficiently cooled by the intercooler. Even in such a case, the present invention is implemented in order to realize the object of preventing the configuration of the traveling wind guide device from becoming complicated and maintaining good durability. The form to do is as follows.

  That is, in the traveling wind guide device for the intercooler in the vehicle, the upstream end opening opens toward the front of the vehicle body so as to introduce the traveling wind, and the downstream end opening opens downward toward the intercooler 7 side. In a side view of the midway portion in the longitudinal direction, the midway portion is bent upward in an arc shape, and extends upward from the intercooler to the vicinity of the downstream end opening of the first air duct. The outlet end opening includes a second air duct facing away from the downstream end opening of the first air duct. The traveling wind introduced into the first air duct is guided through the first and second air ducts to the intercooler.

  In the side view, of the left and right duct walls in the cross section of the second air duct, the upper end portion of one duct wall located on the side where the bending radius of the first air duct is small is on the inner side of the second air duct. A virtual extension surface extending downward along the inner surface of the downstream end opening of the first air duct is positioned between the bent piece and the upper end of the other duct wall of the second air duct. ing.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 is a vehicle exemplified by an automobile, and an arrow Fr indicates the front in the traveling direction of the vehicle 1.

  The interior of the front end portion of the vehicle body 2 of the vehicle 1 is an engine room 3, and a hood 4 that closes the engine room 3 so as to be openable and closable from above is provided. The engine room 3 is equipped with a turbocharged (turbo) engine 6. The engine 6 includes an intercooler 7 interposed in the middle of the longitudinal direction of the intake pipe that connects the supercharger to the engine body, and a traveling wind guide device 9 that supplies the traveling wind 8 to the intercooler 7. Yes. The operation of the intercooler 7 is as described in the “Background Art”.

  The traveling wind guide device 9 includes resin-made first and second air ducts 12 and 13 for guiding the traveling wind 8 to the intercooler 7, and the cross sections of these air ducts are circular or rectangular. . The front end portion of the first air duct 12 is an upstream end opening 14, and the upstream end opening 14 opens toward the front of the vehicle body 2 so as to introduce the traveling wind 8. The rear end portion of the first air duct 12 is a downstream end opening 15, and the downstream end opening 15 opens downward toward the intercooler 7 side. Further, in the side view of the midway portion 16 in the longitudinal direction of the first air duct 12 (side view of the vehicle body 2: FIG. 1), the midway portion 16 is bent into an arc shape.

  The second air duct 13 extends upward from the intercooler 7 to the vicinity of the downstream end opening 15 of the first air duct 12. A lower end portion of the second air duct 13 is attached to an outer edge portion of the intercooler 7. The extended end opening 18 which is the upper end portion of the second air duct 13 and the downstream end opening 15 of the first air duct 12 face each other at a distance from each other. A gap 19 is formed between the downstream end opening 15 of the first air duct 12 and the extended end opening 18 of the second air duct 13 in the entire circumferential direction so that these 12, 13 do not contact each other. ing.

  Further, in the side view (FIG. 1), the downstream end opening 15 of the first air duct 12 is between the entire bent piece 23 and the upper end portion of the other duct wall 22 of the second air duct 13. A virtual extension surface 25 extending downward along the inner surface is located. That is, the pipe-like virtual extension surface 25 extending downward along the inner surface of the downstream end opening 15 of the first air duct 12 is located inside the extension end opening 18 of the second air duct 13.

  One of the left and right duct walls 21 and 22 in the cross section of the second air duct 13 as viewed from the side (FIG. 1) is located on the side where the bending radius of the second air duct 13 is small (left side in FIG. 1). The upper end portion of the duct wall 21 is bent toward the inner side of the second air duct 13 to form a bent piece 23. This bent piece 23 protrudes linearly obliquely upward.

  When the vehicle 1 travels, the traveling wind 8 introduced into the first air duct 12 is guided to the intercooler 7 through the first and second air ducts 12 and 13 in order, and in the core of the intercooler 7. It is made to flow so that it may penetrate between each fin toward the bottom. At this time, the engine intake air flowing inside the core of the intercooler 7 is cooled (air-cooled) by exchanging heat with the traveling wind 8.

  According to the above configuration, when the traveling wind 8 flows in the first air duct 12 toward the second air duct 13, the inner surface on the side where the bending radius of the first air duct 12 is small (the left side in FIG. 1). The traveling wind 8a that flows along the second wind duct 8a has a smaller inertial force than the other traveling winds 8, so the momentum of the inflow of the traveling wind 8a from the first air duct 12 into the second air duct 13 is as follows. Tend to be weak. However, according to the above configuration, the virtual extension surface 25 extending downward along the inner surface of the downstream end opening 15 of the first air duct 12 is positioned on the inner side of the second air duct 13 than the bent piece 23. It has been.

  For this reason, firstly, the traveling wind 8 a flowing into the second air duct 13 from the first air duct 12 enters the second air duct 13 due to the presence of the space 27 below the bent piece 23. It becomes easier to flow in. Therefore, the traveling wind 8a sufficiently cools the engine intake air flowing through a portion 7a (the left portion in FIG. 1) of the intercooler 7 located on the side where the bending radius of the first air duct 12 is small. Second, since the traveling wind 8a is weak in flow, a part of the traveling wind 8a may collide with the upper surface of the intercooler 7 and be reversed upward. However, the upward flow of the traveling wind 8 b reversed in this way is restricted by the lower surface of the bent piece 23. Accordingly, the traveling wind 8b is prevented from leaking outside through the gap 19, and the intake air flowing through the portion 7a of the intercooler 7 is more sufficiently cooled.

  On the other hand, when the traveling wind 8 flows in the first air duct 12 toward the second air duct 13, along the inner surface on the side where the bending radius of the first air duct 12 is large (right side in FIG. 1). The flowing running wind 8c flows vigorously because of its large inertial force.

  For this reason, the traveling wind 8c vigorously flows from the first air duct 12 into the second air duct 13, and the other portion 7b of the intercooler 7 located on the side where the bending radius of the first air duct 12 is large. The intake air flowing through the other part 7b of the intercooler 7 is sufficiently cooled by vigorously penetrating (right side part in FIG. 1). Therefore, it is more reliably prevented that a part of the traveling wind 8c leaks through the gap 19 and the intake air flowing through the other part 7b of the intercooler 7 is more sufficiently cooled.

  That is, according to the traveling wind guide device 9, the intake air is sufficiently cooled by the entire intercooler 7. Moreover, the sufficient cooling of the intake air prevents the traveling wind 8 from leaking from the gap 19 between the downstream end opening 15 of the first air duct 12 and the extended end opening 18 of the second air duct 13. This is achieved without providing a sealing material that closes the gap 19. Therefore, as described above, even when the intake air is sufficiently cooled by the intercooler 7, the configuration of the traveling wind guide device 9 is prevented from being complicated, and the life of the sealing material is reduced. Durability is maintained satisfactorily because it is not related.

  As described above, the traveling wind 8c vigorously flows into the second air duct 13 from the first air duct 12, and therefore the downstream end opening 15 of the first air duct 12 on the side with the larger bending radius is provided. You may make it produce a negative pressure in the clearance gap 19 between the said both openings 15 and 18 by devising the structure relevant to the extension end opening 18 of the 2nd air duct 13. FIG. In this way, since the outside air 28 tends to flow into the second air duct 13 through the gap 19, a part of the traveling wind 8 c leaks outside through the gap 19. Further, the intake air flowing through the other portion 7b of the intercooler 7 is further reliably cooled, and is further sufficiently cooled.

  Moreover, although the above is based on the illustrated example, the side view of the middle part 16 of the first air duct 12 may correspond to the front view of the vehicle body 2. Further, the bent shape of the midway portion 16 of the first air duct 12 may be close to an inverted L shape.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Engine room 4 Hood 6 Engine 7 Intercooler 7a Part 7b Other part 8 Running wind 9 Running wind guide device 12 1st air duct 13 2nd air duct 14 Upstream end opening 15 Downstream end opening 16 Midway part 18 Extension End opening 19 Clearance 21 Duct wall 22 Duct wall 23 Bending piece 25 Virtual extension surface 27 Space 28 Air

Claims (1)

The upstream end opening opens toward the front of the vehicle body so as to introduce traveling wind, and the downstream end opening opens downward toward the intercooler side. A first air duct bent into a circular arc shape, and extends upward from the intercooler to the vicinity of the downstream end opening of the first air duct, and the extended end opening becomes a downstream end opening of the first air duct. To an intercooler in a vehicle comprising a second air duct facing away from the vehicle, wherein traveling wind introduced into the first air duct is sequentially guided to the intercooler through the first and second air ducts. In the traveling wind guide device of
In the side view, of the left and right duct walls in the cross section of the second air duct, the upper end portion of one duct wall located on the side where the bending radius of the first air duct is small is on the inner side of the second air duct. A virtual extension surface extending downward along the inner surface of the downstream end opening of the first air duct is positioned between the bent piece and the upper end of the other duct wall of the second air duct. A traveling wind guide device for an intercooler in a vehicle.

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