JP2018017194A - Attachment structure of intercooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure of an intercooler which is high in cooling efficiency.SOLUTION: Fins 22 arranged at an intercooler 2A are arranged while inclining so that a vehicle front part FR side becomes high and a vehicle rear part RR side becomes low with respect to a virtual end face 24 which is formed of an opening part formed between tubes 20, 20 of the intercooler 2A. The intercooler 2A is attached to an upper part of an engine 1 while inclining so that the vehicle front part FR side becomes low and the vehicle rear part RR side becomes high. In this attachment state, inclination angles θ of the fins 22 with respect to a horizontal direction are not smaller than 20° and not larger than 40°. In the attachment structure of the intercooler, even if a radiator fan 3f is operated, hot air from the radiator 3 arranged at the vehicle front part FR in the engine 1 hardly flows into a flow passage of outside air w in the intercooler 2A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an intercooler mounting structure in which an intercooler is mounted above an engine mounted on a vehicle.

  Conventionally, in a vehicle engine equipped with a supercharger such as a turbocharger, an intercooler is installed between the throttle valve and the supercharger, and the air (intake air) compressed by the supercharger and cooled to high temperature is cooled, and the engine It is made to supply to the intake system. As shown in FIG. 5, an air-cooled intercooler 200 as described in Patent Document 1 includes an introduction tank portion 250 into which the above-described high-temperature intake air is introduced, and the intake air that has been radiated to a low temperature by releasing heat. And a plurality of tubes (not shown) through which intake air is circulated, and fins 220 that dissipate heat of the intake air. The plurality of tubes are arranged in parallel at predetermined intervals. The fins 220 are arranged between adjacent tubes so that the outside air (running wind) w, which is cooling air, passes between the tubes. Typically, the fin 220 is constituted by a corrugated plate, and as shown in FIG. 5, the ridge line at the peak of the peak portion and the ridge line at the bottom of the valley portion are arranged so as to be orthogonal to the axial direction of the tube. Is done. As a result, the flow path of the outside air w created by the tube and the fin 220 is provided so as to be orthogonal to the axial direction of the tube (the direction of the intake air flow) (hereinafter, such an intercooler has an orthogonal fin configuration). Call). A rectangular parallelepiped aggregate composed of the plurality of tubes and the plurality of fins is referred to as a core portion.

  The intercooler 200 is, for example, installed in the engine room 8 of the vehicle above the engine 1, and the outside air w is introduced into the core portion via the duct 7 provided with an opening 70 in the vehicle front FR. As shown in FIG. 5 and FIG. 1 of Patent Document 1, when the intercooler 200 is attached in a state of lowering forward where the vehicle front FR side of the core portion is low and the vehicle rear RR side is high, the attachment height is reduced to some extent, The outside air w from the duct 7 can be introduced into the core portion. In FIG. 5, the duct 7 and the intercooler 200 are attached to the vehicle so that the intake air is circulated from the vehicle front FR to the vehicle rear RR and the outside air w is circulated from the vehicle upper UP to the vehicle lower LWR. Indicates the case where

JP 2007-270739 A

  When the above-described orthogonal fin-shaped intercooler 200 is attached to the upper side of the engine 1 as described above, the angle γ with respect to the horizontal direction in the flow path of the outside air w of the intercooler 200 is as shown in FIG. It tends to be close to a right angle. As a result, as will be described later, hot air from the radiator 3 is introduced into the flow path of the outside air w, and the flow resistance is large, so that the cooling efficiency of the intake air may be reduced.

  When the radiator 3 and the radiator fan 3f are arranged in the vehicle front FR in the engine 1, when the radiator fan 3f is operated, hot air from the radiator 3 is generated from the outside air w of the intercooler 200 as shown by broken line arrows in FIG. There is a risk of flowing into the flow path. Since hot air has a small density and is light, there is a risk that it will flow into the flow path of the outside air w and further reach the duct 7. If the hot air is introduced into the flow path of the outside air w, the heat of the intake air in the tube cannot be sufficiently radiated through the fins 220, and the intake air temperature may increase. When the radiator fan 3f is operated, the vehicle is often traveling at a low speed or the vehicle is not traveling, and the intercooler 200 is in a state where the traveling air that is the cooling air cannot be sufficiently obtained. It is considered that it is difficult to dissipate the heat of the intake air because the hot air is introduced.

  Further, in the vicinity of the duct 7 and the flow path of the outside air w of the intercooler 200, the flow direction of the outside air w greatly changes from the vehicle front-rear direction to the vehicle up-down direction, and the circulation speed (wind speed) of the outside air w tends to decrease. It can be said that the road resistance is large. In particular, the region on the vehicle front FR side of the core portion has a greater change in the flow direction than the region on the vehicle rear RR side, and is likely to be a region where the outside air w hardly flows. It is considered that it is difficult to dissipate the heat of the intake air because the circulation speed of the outside air w decreases or the distribution state of the outside air w in the core portion is biased.

  One of the objects of the present invention is to provide an intercooler mounting structure with high cooling efficiency.

The mounting structure of the intercooler according to one aspect of the present invention is as follows.
An intercooler mounting structure in which a radiator and a radiator fan are disposed in front of a vehicle in an engine and an intercooler is mounted above the engine,
The intercooler is
A plurality of tubes arranged in parallel with the intake air being circulated;
A fin disposed between the adjacent tubes and dissipating heat from the intake air;
The fin or the tube is arranged to be inclined with respect to a virtual end surface formed by an opening provided between the tubes in the intercooler so that the vehicle front side is high and the vehicle rear side is low,
The intercooler is attached to the vehicle by inclining so that the vehicle front side is low and the vehicle rear side is high,
In this attached state, the inclination angle of the fin or the inclination angle of the tube with respect to the horizontal direction is 20 ° or more and 40 ° or less.

  The above-described intercooler mounting structure can efficiently dissipate the heat of the intake air in the tube to the outside air through the fins for the following reason, and the intake air cooling efficiency is high.

  In the above-described intercooler mounting structure, the angle of the intercooler in the flow path of the outside air with respect to the horizontal direction can be reduced as compared with the above-described conventional orthogonal fin configuration. For this reason, when the radiator fan is operated, hot air from the radiator is difficult to flow into the external air flow passage of the intercooler, and the outside air as the cooling air can be circulated well.

  In the above-described intercooler mounting structure, the change in the flow direction of the outside air can be reduced in the vicinity of the duct for introducing the outside air to the intercooler and the outside air flow passage of the intercooler as compared with the above-described conventional orthogonal fin configuration. . In particular, the change in the flow direction in the area of the intercooler on the front side of the vehicle can be reduced. Therefore, it is easy to reduce a decrease in the flow rate of the outside air introduced into the intercooler, and the outside air can be vigorously brought into contact with the fins. Further, outside air easily flows over a wide range from the front of the intercooler to the rear of the vehicle.

It is a schematic block diagram which shows the attachment structure of the intercooler of Embodiment 1. It is a schematic plan view of the intercooler with which the intercooler mounting structure of the first embodiment is provided. It is a schematic block diagram which shows the attachment structure of the intercooler of Embodiment 2. It is a schematic plan view of the intercooler with which the intercooler mounting structure of Embodiment 2 is provided. It is a schematic block diagram which shows the state by which the conventional intercooler was attached to the motor vehicle.

The intercooler mounting structure of the present invention will be specifically described below with reference to the drawings.
In the drawings, the same reference numerals indicate the same names.

[Embodiment 1]
(overall structure)
With reference to FIG. 1 and FIG. 2, the mounting structure of the intercooler of Embodiment 1 is demonstrated. In FIG. 1 and the like, the front of the vehicle is the vehicle front FR, the rear is the vehicle rear RR, the upper is the vehicle upper UP, the lower is the vehicle lower LWR, the right is the vehicle right RH (such as FIG. 4), and the left is the vehicle left Called LH (FIG. 4 etc.). FIG. 1 shows a longitudinal section in which an engine room 8 provided in a vehicle front FR of an automobile is cut along a plane parallel to the vertical direction of the automobile.

  The intercooler mounting structure of the first embodiment includes an engine 1 having a supercharger (not shown) such as a turbocharger, an air-cooled intercooler 2A disposed in the vicinity of the engine 1, and a vehicle front in the engine 1. The present invention is used for an automobile equipped with a radiator 3 and a radiator fan 3f arranged in the FR. In addition, the intercooler mounting structure of the first embodiment is provided with an opening 70 in the vehicle front FR of an automobile provided with a front grill or the like, and outside air (running wind) that is cooling air from the vehicle front FR toward the vehicle rear RR. ) W is introduced, and is further used for an automobile provided with a duct 7 for guiding the outside air w to the intercooler 2A side. The intercooler 2A in this example is attached to the automobile so that the intake air that has passed through the supercharger flows from the vehicle front FR to the vehicle rear RR, and the outside air w flows from the vehicle upper UP to the vehicle lower LWR. It is.

The intercooler mounting structure of the first embodiment is such that the intercooler 2A is mounted above the engine 1 so that the mounting direction of the fins 22 in the intercooler 2A and the mounting direction of the intercooler 2A itself with respect to the vehicle satisfy specific conditions. It is what was done. In addition, in the intercooler mounting structure of the first embodiment, the flow path of the outside air w of the intercooler 2A is provided in a particularly front-up state in which the flow path of the external air w intersects the tube axial direction non-orthogonally, The intercooler 2A is attached to the automobile in a state of being lowered forward. In the mounted state of the intercooler 2A, the inclination angle θ of the fin 22 with respect to the horizontal direction is 20 ° or more and 40 ° or less. In FIG. 1 and the like, the angles θ, α, β and the like are exaggerated.
This will be described in more detail below.

(Intercooler)
As shown in FIG. 2, the intercooler 2 </ b> A includes a plurality of tubes 20 in which intake air is circulated and arranged in parallel, and fins 22 that are arranged between adjacent tubes 20 and 20 to dissipate heat from the intake air. Prepare. The intercooler 2A further introduces the intake tank portion 25 into which the air (intake air) that has been compressed by the turbocharger and has become high temperature is introduced, and the intake air that has been radiated through the fins 22 and has become low temperature to the engine 1 side. And a discharge tank unit 27 for discharging. The plurality of tubes 20 and the plurality of fins 22 typically constitute a rectangular parallelepiped core.

  Each tube 20 is arranged in parallel with the adjacent tube 20 at a predetermined interval, one end is connected to the introduction tank unit 25, the other end is connected to the discharge tank unit 27, and intake air is supplied from the introduction tank unit 25. It flows into the discharge tank part 27. Each tube 20 is made of a material excellent in heat dissipation, for example, a metal such as aluminum or an aluminum alloy, and is typically an elliptical cylindrical body having a long and narrow cross-sectional shape (refer to a broken circle in FIG. 4 described later). . The size of each tube 20, the number of core parts, the interval between the tubes 20, 20, and the like can be selected as appropriate, and are conceptually shown in FIGS. 1 and 2 (the size of the fins 22 described later and FIGS. 3 and 4). The same applies to.

  The fin 22 is provided in a through space (in this example, a rectangular parallelepiped space) surrounded by the adjacent tubes 20 and 20 and the tank portions 25 and 27. The fin 22 is fixed to the tube 20 or the like so that the outside air w can flow from one opening side of the tubes 20 and 20 forming the through space toward the other opening side, and to the outside air w with respect to the intake air flowing into the tube 20. It is a member that increases the heat radiation area. The fins 22 are made of a material having excellent heat dissipation, for example, a metal such as aluminum or an aluminum alloy. The fin 22 in this example is a corrugated plate in which crests and troughs are periodically provided, and the tubes 20, 20 are such that the tops of the crests and the bottoms of the troughs are in contact with the adjacent tubes 20, 20. Arranged between. A space formed by sandwiching the corrugated plate between the tubes 20 and 20 is defined as a flow path of the outside air w. One opening part of this flow path is provided in one opening side which comprises the said penetration space, and the other opening part is provided in the other opening side. The corrugated plate is an example of a component material of the fin 22, and a plate material group in which a plurality of plate materials are arranged in parallel can be used for the fin 22 as in the second embodiment described later.

  In the intercooler 2A, as shown in FIG. 1, the fins 22 are inclined with respect to the virtual end surface 24 of the core so that the vehicle front FR side is higher and the vehicle rear RR side is lower. The virtual end surface 24 is a virtual surface formed by an opening provided between the tubes 20 and 20 in a rectangular parallelepiped core, that is, one opening edge of the tubes 20 and 20 forming the above-described through space and circulation of the outside air w. It is a virtual surface created by the opening of the road. The inclination angle α of the fin 22 with respect to the virtual end face 24 is an acute angle of less than 90 °. As the inclination angle α decreases, hot air from the radiator 3 is less likely to flow into the flow path of the outside air w of the intercooler 2A even when the radiator fan 3f is operated in a state where the intercooler 2A is attached to the front lower side. Further, in the vicinity of the opening on the introduction side of the outside air w in the flow path of the outside air w (near the connection side with the duct 7), it is easy to reduce the change in the flow direction of the outside air w and to reduce the flow resistance of the outside air w. If the inclination angle α is too small, it is difficult for the outside air w to flow from the duct 7 to the core portion. Considering the prevention of hot air inflow, reduction of flow resistance, good introduction of outside air w, etc., the inclination angle α can be set to 45 ° or more and 55 ° or less. When the intercooler 2A is configured with a corrugated plate as in this example, the inclination angle α of the fin 22 is the inclination of the ridge line at the peak of the peak and the ridge line at the bottom of the valley with respect to the virtual end surface 24 (here, the tube 20 Is equivalent to the inclination with respect to the axial direction).

(Mounting state)
The intercooler 2A is attached to an automobile (an example of a vehicle) with an inclination so that the vehicle front FR side of the core portion is low and the vehicle rear RR side is high. In the state where the intercooler 2A is attached in such a manner as to be lowered forward, the intercooler 2A has a structure in which the inclination angle θ of the fin 22 with respect to the horizontal direction satisfies 20 ° or more and 40 ° or less in accordance with the inclination angle α described above. The mounting angle β with respect to the horizontal direction may be adjusted (for example, β = 15 ° to 25 °). If the inclination angle θ is 40 ° or less, it is difficult for the hot air described above to flow into the flow path of the outside air w of the intercooler 2A, and the flow resistance can be reduced. The smaller the inclination angle θ, the easier it is to enhance the hot air inflow prevention effect and the flow resistance reduction effect. If the inclination angle θ is 20 ° or more, it is easy to increase the inclination angle α to some extent, the outside air w can be easily introduced into the flow path of the outside air w, and the attachment angle β is reduced to a certain degree when the inclination angle α is constant. And it is easy to ensure a large space between the hood 9 and the intercooler 2A. Here, when the outside air w is guided to the intercooler 2A from the vehicle upper UP to the vehicle lower LWR through the duct 7 extending from the vehicle front FR to the vehicle rear RR, the smaller the mounting angle β is, the more the It is easy to suppress the trumpet-shaped supply part provided near the connection point with the intercooler 2A from bulging upward in the vehicle. As a result, it is easy to ensure a large space between the hood 9 and the intercooler 2A, which is preferable from the viewpoint of pedestrian protection. In consideration of prevention of hot air inflow, good introduction of outside air w, pedestrian protection, and the like, the inclination angle θ may be appropriately selected within the above range.

  FIG. 1 shows a state in which the intercooler 2A in which the inclination angle α satisfies the above range is attached to the front lower side so that the inclination angle θ satisfies the above range. By attaching the duct 7 to the intercooler 2A, the outside air w introduced from the vehicle front FR to the vehicle rear RR along the duct 7 is diagonally above the vehicle of the core portion of the intercooler 2A according to the inclination angle θ. The vehicle flows diagonally downward from the vehicle. In the state where the intercooler 2A is mounted so as to satisfy the specific condition as described above, the angle with respect to the horizontal direction in the flow path of the outside air w of the intercooler 2A is the inclination angle θ, and the above-described conventional orthogonal fin configuration close to a right angle Small compared to Therefore, the change in the flow direction of the outside air w from the duct 7 toward the intercooler 2A can be reduced, and the fins 22 easily come into contact with the outside air w over the entire region from the vehicle front FR to the vehicle rear RR of the core portion. Therefore, the fin 22 efficiently dissipates the heat of the intake air flowing through the tube 20 from the vehicle front FR toward the vehicle rear RR to the outside air w, and contributes to a decrease in the intake air temperature.

(effect)
In the intercooler mounting structure of the first embodiment, the angle with respect to the horizontal direction in the flow path of the outside air w provided in the intercooler 2A is smaller than the above-described conventional orthogonal fin configuration as described above. Even if the radiator fan 3f is operated, hot air from the radiator 3 is difficult to flow into the flow path of the outside air w. In addition, the intercooler mounting structure of the first embodiment can make the change in the flow direction of the outside air w flowing from the duct 7 to the outside air w flow path smaller than the above-described conventional orthogonal fin configuration. Therefore, the fall of the circulation speed of the outside air w at the time of flowing into the intercooler 2A from the duct 7 can be reduced, and the outside air w having a high circulation speed can be vigorously brought into contact with the fins 22. Further, as described above, the fins 22 are likely to be in uniform contact with the outside air w over the entire region from the vehicle front FR to the vehicle rear RR of the core portion of the intercooler 2A, and the contact state with the outside air w in the core portion is uneven. Can be improved. The mounting structure of the intercooler of the first embodiment is such that the cooling efficiency of the intake air flowing through the tube 20 is reduced by suppressing the decrease in the heat dissipation efficiency of the intercooler 2A by the hot air from the radiator 3 and the reduction of the flow resistance of the outside air w. Excellent.

  Furthermore, since the intercooler mounting structure of the first embodiment is configured to introduce the outside air w from the vehicle front FR to the intercooler 2A via the duct 7, the inclination angle θ of the fin 22 satisfies the above-described specific range. Thus, it is easy to increase the distance between the hood 9 and the intercooler 2A, which is preferable from the viewpoint of pedestrian protection.

[Embodiment 2]
With reference to FIG. 3 and FIG. 4, the mounting structure of the intercooler of Embodiment 2 is demonstrated. In FIG. 3, the longitudinal cross-section of the core part of the intercooler 2B, the engine 1, the radiator 3, and the radiator fan 3f are extracted and shown.

  The basic configuration of the intercooler mounting structure of the second embodiment is the same as that of the first embodiment. The difference from the first embodiment is that the intercooler 2B is configured such that the flow direction of intake air is the vehicle width direction (the left-right direction of the vehicle). In other words, the inclination angle θ of the tube 20 with respect to the horizontal direction is 20 ° or more and 40 ° or less in the attachment state of the intercooler 2B. Moreover, the fin 22 of this example is comprised by the some board | plate material group. Hereinafter, differences will be described in detail, and detailed description of common configurations and effects with the first embodiment will be omitted.

  The intercooler 2B provided in the intercooler mounting structure of the second embodiment is similar to the intercooler 2A described in the first embodiment, as shown in FIG. The fin 22 arrange | positioned in between, the introduction tank part 25, and the discharge tank part 27 are provided. In the intercooler 2B, as shown in FIG. 3, the tubes 20 are arranged to be inclined with respect to the virtual end surface 24 so that the vehicle front FR side is high and the vehicle rear RR side is low. The first embodiment may be referred to regarding the virtual end surface 24 and the inclination angle α of the tube 20 with respect to the virtual end surface 24.

  The fin 22 is provided in a through space surrounded by the adjacent tubes 20 and 20 and the tank portions 25 and 27. The through space in this example is a parallelogram-shaped space having a vertical cross-sectional shape having a corner portion with an inclination angle α. The fins 22 in this example are configured by a plate material group in which a plurality of plate materials are arranged in parallel while being separated along the axial direction of the tube 20 as shown in a broken-line circle in FIG. Each plate is arranged between the tubes 20 and 20 so that two peripheral edges facing the adjacent tubes 20 and 20 are in contact with the tubes 20 and 20. A space surrounded by the adjacent tubes 20 and 20 and two plate members adjacent in the axial direction of the tube 20 is defined as a flow path of the outside air w. One opening part of this flow path is provided in one opening side which comprises the said penetration space, and the other opening part is provided in the other opening side. The plate material in this example is a rectangular thin plate material having a short side edge having a length corresponding to the interval between adjacent tubes 20 and 20 and a long side edge having a length close to the long diameter of the tube 20. However, the shape and size of the plate material, the arrangement interval of the plate material, and the like can be selected as appropriate. Refer to Embodiment 1 for the constituent materials of the plate material.

  FIG. 3 shows a state in which the intercooler 2B in which the inclination angle α satisfies the above-described range (45 ° to 55 °) is attached to the front lower side so that the inclination angle θ satisfies the above-described range. By attaching the duct 7 (FIG. 1) to the intercooler 2B, the outside air w introduced from the vehicle front FR to the vehicle rear RR along the duct 7 is changed to the core portion of the intercooler 2B according to the inclination angle θ. From the upper side of the vehicle to the lower side of the vehicle (flowing from the upper left side to the lower right side on the sheet of FIG. 3). In the state where the intercooler 2B is mounted so as to satisfy the specific condition as described above, the angle with respect to the horizontal direction in the flow path of the outside air w of the intercooler 2B is the inclination angle θ, and the above-described conventional orthogonal fin configuration close to a right angle Small compared to Therefore, the change in the flow direction of the outside air w from the duct 7 toward the intercooler 2B can be reduced, and the fins 22 easily come into contact with the outside air w over the entire region from the vehicle front FR to the vehicle rear RR of the core portion.

(effect)
In the intercooler mounting structure of the second embodiment, the angle (inclination angle θ) with respect to the horizontal direction in the flow path of the outside air w provided in the intercooler 2B is smaller than that of the above-described conventional orthogonal fin configuration as in the first embodiment. Therefore, according to the mounting structure of the intercooler of the second embodiment, the cooling efficiency of the intake air flowing through the tube 20 is excellent by reducing the inflow of hot air from the radiator 3 and reducing the flow resistance. Further, the intercooler mounting structure of the second embodiment using the duct 7 is also preferable from the viewpoint of protecting pedestrians because it is easy to increase the distance between the hood 9 and the intercooler 2B.

  The present invention is not limited to these exemplifications, but is defined by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

DESCRIPTION OF SYMBOLS 1 Engine 2A, 2B, 200 Intercooler 20 Tube 22, 220 Fin 24 Virtual end face 25, 250 Introduction tank part 27,270 Discharge tank part 3 Radiator 3f Radiator fan 7 Duct 70 Opening 8 Engine room 9 Hood w Outside air (running wind) )

Claims (1)

An intercooler mounting structure in which a radiator and a radiator fan are disposed in front of a vehicle in an engine and an intercooler is mounted above the engine,
The intercooler is
A plurality of tubes arranged in parallel with the intake air being circulated;
A fin disposed between the adjacent tubes and dissipating heat from the intake air;
The fin or the tube is arranged to be inclined with respect to a virtual end surface formed by an opening provided between the tubes in the intercooler so that the vehicle front side is high and the vehicle rear side is low,
The intercooler is attached to the vehicle by inclining so that the vehicle front side is low and the vehicle rear side is high,
The mounting structure of the intercooler in which the inclination angle of the fin with respect to the horizontal direction or the inclination angle of the tube is 20 ° or more and 40 ° or less in this attachment state.

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