JP2017056838A - vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle of which a rear part of an engine room can be suitably cooled while suppressing increase in air resistance during travel of the vehicle.SOLUTION: A vehicle 10 comprises: a front grille 13 which is provided at a forward end thereof; a radiator 14 which is provided at a position adjacent to the front grille 13 in the engine room 12; a cooling fan 15 which is attached to a portion on a rear side of the radiator 14; and an engine 11 which is loaded on a rear side with respect to the cooling fan 15 in the engine room 12. In the engine room 12, an air introduction duct 20 having a shape which bypasses the engine 11 and extends toward a rear side is located. The air introduction duct 20 has such a shape that an introduction port 21 is opened forwards at a position where the duct is overlapped on the cooling fan 15 in a vehicle longitudinal direction between the cooling fan 15 and the engine 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle in which a heat exchanger and a blower fan are provided in an engine room.

  The front part of a vehicle such as an automobile is often an engine room on which an engine is mounted. A front grill is provided at the front end of such a vehicle, and a heat exchanger (a radiator or a condenser of a cooling device) is disposed at a position adjacent to the front grill on the rear side of the front grill. When the vehicle is traveling, the heat exchanger is cooled by traveling wind (air) flowing into the engine room via the front grill.

  A cooling fan is attached to the rear portion of the heat exchanger, and the cooling fan is rotationally driven to generate a flow of air flowing into the engine room. The heat exchanger is cooled by the air flow generated by the cooling fan when the vehicle is stopped or when traveling at a low speed.

  Furthermore, the vehicle described in Patent Document 1 is provided with a duct having a shape that opens at a position aligned with the heat exchanger in the vehicle width direction and flows air (running wind) flowing into the engine room around the engine. ing. By providing such a duct, the traveling wind is introduced into the rear part of the engine room in the engine room (hereinafter referred to as the rear part of the engine room), so only the heat exchanger provided in front of the engine. Instead, the components (battery, engine exhaust system, etc.) arranged at the rear of the engine room are cooled.

JP 2007-55274 A

  Here, when the vehicle travels, air resistance is generated by air passing through a narrow space in the engine room. As the amount of air flowing into the engine room increases, the air resistance during such vehicle travel increases.

  In the vehicle described in Patent Document 1, a duct that opens at a position aligned with the heat exchanger in the width direction of the vehicle is provided in the engine room, although it is for cooling the components arranged in the rear part of the engine room. The intake port for taking in air will increase. As a result, the amount of air flowing into the engine room increases, leading to an increase in air resistance during vehicle travel.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle capable of suitably cooling the rear portion of the engine room while suppressing an increase in air resistance during vehicle travel.

  A vehicle for solving the above problems is provided at the front end of the vehicle and takes in air into the engine room, and at a position adjacent to the front grill on the rear side of the front grill in the engine room. And a provided heat exchanger. The vehicle is attached to a portion of the heat exchanger on the rear side of the vehicle, and a cooling fan that blows air toward the rear of the vehicle, and an engine mounted on the rear side of the vehicle in the engine room with respect to the cooling fan. And comprising. Further, the vehicle is disposed in the engine room and extends toward the rear of the vehicle by bypassing the engine, and overlaps the cooling fan in the vehicle front-rear direction between the cooling fan and the engine. And a wind guide duct having an opening opening toward the front of the vehicle.

  When the vehicle is traveling, the vehicle is more than the engine in the engine room so that part of the traveling wind (air) that flows into the engine room through the front grill and the heat exchanger bypasses the engine by the air duct. It is guided to the rear side part (hereinafter, engine room rear). Further, when the vehicle is stopped or traveling at a low speed, the engine is configured such that a part of the air flow generated by the rotation drive of the cooling fan and passed through the front grill and the heat exchanger bypasses the engine by the air guide duct. Guided to the back of the room. Therefore, according to the vehicle, the rear portion of the engine room can be suitably cooled by the flow of relatively low temperature air that bypasses the engine that is a heat source. In addition, the introduction port of the air guide duct is opened at a position overlapping the cooling fan in the vehicle front-rear direction. For this reason, even though an air duct is provided, an increase in the amount of air flowing into the engine room can be suppressed because the number of intakes for taking air into the engine room does not increase. An increase in air resistance can be suppressed. Thus, according to the vehicle, the rear portion of the engine room can be suitably cooled while suppressing an increase in air resistance during vehicle travel.

1 is a schematic diagram illustrating a schematic configuration of a vehicle according to an embodiment. The perspective view which shows the structure of the wind guide duct in the engine room of the vehicle, and its periphery. The perspective view of a wind guide duct. The perspective view of the wind guide duct of the state which abbreviate | omitted the upper wall. Schematic which shows schematic structure of the vehicle of other embodiment. The perspective view which shows the duct member in the engine room of the vehicle, and the structure of the periphery.

Hereinafter, an embodiment of the vehicle will be described.
As shown in FIG. 1, the front portion of the vehicle 10 (the left portion in FIG. 1) is an engine room 12 on which an engine 11 is placed. A front grill 13 is attached to the front end of the vehicle 10, and air is taken into the engine room 12 through the front grill 13. Inside the engine room 12, a radiator 14 as a heat exchanger is disposed at a position adjacent to the front grill 13 on the rear side (right side in FIG. 1) of the front grill 13. Specifically, when the opening portion of the front grill 13 is projected on the front surface of the radiator 14 from the front to the rear of the vehicle 10, the radiator 14 is entirely included in the front surface of the radiator 14. In the position. A cooling fan 15 that blows air toward the rear of the vehicle 10 is attached to a portion on the rear side of the radiator 14. The engine 11 is placed on the rear side of the cooling fan 15 in the engine room 12.

Inside the engine room 12, an air guide duct 20 for forming a flow of air that bypasses the engine 11 is disposed. Hereinafter, the air guide duct 20 will be described in detail.
As shown in FIG. 1 and FIG. 2, the air guide duct 20 has air passing through it, and the path through which the air passes extends in a substantially quadrangular cross section. One end of the air guide duct 20 is an introduction port 21 that opens toward the front at a position overlapping the cooling fan 15 in the vehicle front-rear direction between the engine 11 and the cooling fan 15. The other end of the air guide duct 20 is a discharge port 22 that opens rearward on the upper side of the engine 11. The air guide duct 20 has a shape that connects the introduction port 21 and the discharge port 22. The front passage portion 23 has a shape that extends upward from the introduction port 21 as a starting point, and the rear side from the upper end of the front passage portion 23. And an upper passage portion 24 having a shape extending to the discharge port 22. As described above, the air duct 20 has a shape in which the introduction port 21 opens behind the cooling fan 15, bypasses the upper side of the engine 11, extends rearward, and the exhaust port 22 opens above the engine 11. It is.

As shown in FIGS. 3 and 4, the air guide duct 20 is provided with three air guide plates 25, 26 and 27 for guiding the air flow.
The front passage portion 23 of the air guide duct 20 and the front portion (the front portion 24A) of the upper passage portion 24 have a shape in which the length in the width direction of the vehicle 10 does not change so much, whereas the upper passage portion 24 The rear side portion (rear portion 24B) of the vehicle 10 is formed in a shape in which the length in the width direction of the vehicle 10 gradually increases toward the rear.

  One of the three air guide plates (the air guide plate 25) is separated from the engine 11 starting from the wall (bottom wall 28) of the air guide duct 20 on the engine 11 (see FIG. 1) side. In a shape protruding in the direction, it is provided inside the front passage portion 23 and inside the front portion 24A of the upper passage portion 24. The wind guide plate 25 extends along the extending direction of the front passage portion 23 inside the front passage portion 23, and extends in the front portion 24 </ b> A of the upper passage portion 24. It is a shape extended along.

  Further, the remaining two of the three air guide plates (the air guide plates 26 and 27 [FIG. 3]) are lowered from the wall portion (upper wall 29) on the side farther from the engine 11 of the air guide duct 20 as a starting point. And is provided inside the upper passage portion 24. The air guide plates 26 and 27 extend substantially in parallel along the extending direction of the front portion 24A in the front portion 24A of the upper passage portion 24, and in the rear portion 24B of the upper passage portion 24. It is the shape extended so that the mutual distance in the width direction of the vehicle 10 may gradually become so far as it goes to.

The effect | action by providing such an air guide duct 20 is demonstrated.
When the vehicle 10 (FIG. 1) travels, a part of the traveling wind (air) that flows into the engine room 12 through the front grill 13 and passes through the radiator 14 flows from the introduction port 21 and flows into the wind guide duct 20. While flowing in the inside, it flows out from the discharge port 22 to the outside of the air guide duct 20. As a result, a part of the traveling wind is guided to a portion of the engine room 12 on the rear side of the engine 11 (hereinafter, the rear part of the engine room 12) so as to bypass the engine 11.

  Further, when the vehicle 10 is stopped or travels at a low speed, a part of the air flow generated by the rotation drive of the cooling fan 15 and passing through the front grill 13 and the radiator 14 flows into the air inlet duct 20 through the inlet 21. While flowing in the inside, it flows out from the discharge port 22 to the outside of the air guide duct 20. Thereby, a part of the air flow generated by the cooling fan 15 is guided to the rear of the engine room 12 so as to bypass the engine 11.

  In this manner, by providing the air guide duct 20 in the vehicle 10, a relatively low temperature air flow that bypasses the engine 11 that is a heat source can be guided to the rear of the engine room 12. 12 A component (for example, an exhaust system or a battery of the engine 11) disposed in the rear portion can be suitably cooled.

  Moreover, the introduction port 21 of the air guide duct 20 is opened at a position where it overlaps the cooling fan 15 in the front-rear direction of the vehicle 10. Therefore, although the air guide duct 20 is provided, the flow of air is guided to the rear part of the engine room 12 in a manner of bypassing the engine 11 without increasing the intake for taking air into the engine room 12. be able to. As a result, an increase in the amount of air flowing into the engine room 12 can be suppressed as compared with the case where the number of intake ports is increased, so an increase in the amount of traveling wind hitting the components in the engine room 12 can be suppressed. In addition, an increase in air resistance during travel of the vehicle 10 can be suppressed.

Thus, according to the vehicle 10, the rear portion of the engine room 12 can be suitably cooled while suppressing an increase in air resistance during traveling.
Here, assuming that the introduction port 21 of the air guide duct 20 does not overlap the cooling fan 15 in the front-rear direction, when the vehicle 10 is stopped and there is no traveling wind, the wind guide through the introduction port 21 is provided. The inflow of air into the duct 20 is stopped. In this case, the high-temperature air heated in the engine room 12 may be guided to the vicinity of the radiator 14 by flowing in from the discharge port 22 and flowing backward in the air guide duct 20. The occurrence of such a phenomenon is not preferable because the cooling efficiency of the radiator 14 is reduced.

  In this regard, in the vehicle 10, the introduction port 21 of the air guide duct 20 is opened at a position where it overlaps the cooling fan 15 in the front-rear direction. Therefore, even when the vehicle 10 is stopped and there is no traveling wind, the air flow generated by the rotational drive of the cooling fan 15 flows into the air guide duct 20, and the air duct 20 The backflow of air at the can be suppressed. As a result, it is possible to suppress the high-temperature air in the engine room 12 from flowing backward in the air guide duct 20 and being guided to the vicinity of the radiator 14, thereby reducing the cooling efficiency of the radiator 14 due to such backward flow of air. Can be suppressed.

  In addition, when water flows into the engine room 12 through the front grille 13 when the vehicle 10 is traveling on a flooded channel, or when water is rolled up in the engine room 12 during rainy weather, Water may splash. In such a case, if an electrical system component (for example, an alternator) disposed around the engine 11 may be covered with water, the reliability of the electrical system component is reduced. In the vehicle 10, the air guide duct 20 extends in a shape that covers the front and upper sides of the engine 11 and its surrounding electrical components (for example, the alternator 16 [FIG. 1]). Therefore, even if water is scattered in the engine room 12 by the air guide duct 20, it is possible to suppress the electrical system components around the engine 11 from being covered with the water. Further, since the air guide duct 20 has a shape that covers the front and the upper side of the engine 11, the air guide duct 20 can also be used as a design cover that covers the periphery of the engine 11.

  Further, the air guide duct 20 is provided with air guide plates 25, 26, and 27, and these air guide plates 25, 26, and 27 exhibit a rectifying effect that regulates the air flow in the air guide duct 20. In the front portion 24 </ b> A of the front passage portion 23 and the upper passage portion 24, the flow of air is caused by the rectifying effect by the air guide plates 25, 26, 27 having a shape extending along the extending direction. It is guided rearward along the extending direction of the 24 front portions 24A. Therefore, the air that has flowed into the air guide duct 20 from the introduction port 21 can be efficiently guided to the rear side. Further, in the rear portion 24B of the upper passage portion 24, a wider range toward the rear side due to the rectification effect by the baffle plates 26 and 27 having a shape that gradually increases as the distance in the width direction of the vehicle 10 increases toward the rear side. The air flow is guided to spread out. Therefore, air can be discharged over a wide range from the discharge port 22 of the air guide duct 20, and a wide range in the rear part of the engine room 12 can be cooled.

  Moreover, since the air guide plates 25, 26, and 27 provided inside the air guide duct 20 also function as a reinforcing member that reinforces the air guide duct 20, the air guide plates 25, 26, and 27 are compared with those having no air guide plate. The strength of the air duct 20 is increased.

  The air guide duct 20 has a pair of wall portions (side walls 30) extending in a shape that closes between the end portions of the upper wall 29 and the bottom wall 28 at both ends in the width direction of the upper wall 29 and the bottom wall 28. [See FIG. 3]. Therefore, the air passing through the inside of the air guide duct 20 can be efficiently guided to the rear part of the engine room 12 without leaking outside from the end in the width direction of the air guide duct 20.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The rear portion of the engine room 12 can be suitably cooled while suppressing an increase in air resistance when the vehicle 10 is traveling.

The above embodiment may be modified as follows.
-The air guide duct 20 of the said embodiment can be applied also to the vehicle provided with the condenser of the air conditioner instead of the radiator 14 as a heat exchanger. Further, the air guide duct 20 of the above embodiment can also be applied to a vehicle provided with a radiator 14 and a condenser of a cooling device as a heat exchanger.

-The number and shape of the wind guide plates can be arbitrarily changed according to the shape of the wind guide duct.
-You may abbreviate | omit the baffle plates 25, 26, and 27 of the baffle duct 20. Even with such a configuration, a part of the traveling wind when the vehicle 10 is traveling and a part of the air flow generated by the cooling fan 15 when the vehicle 10 is stopped or traveling at a low speed bypass the engine 11 by the air duct. Thus, it can be guided to the rear of the engine room 12.

  The shape of the air guide duct 20 is, for example, a shape that bypasses the side (or the lower side) of the engine 11 and extends rearward, or the entire upper passage portion 24 does not change in length in the width direction. It can be arbitrarily changed. In short, the engine 21 bypasses the engine 11 and extends rearward, and the inlet 21 opens forward at a position between the cooling fan 15 and the engine 11 that overlaps the cooling fan 15 in the front-rear direction. Any shape is acceptable.

  -You may make it comprise an air duct by combining several members. An example of a vehicle provided with such a wind guide duct is shown in FIGS. As shown in FIGS. 5 and 6, the vehicle includes a duct member 44 having a substantially U-shaped cross section including a pair of side walls 41 and a bottom wall 43 having a shape connecting the end portions of the side walls 41 on the engine 11 side. Have. One end portion 44 </ b> A of the duct member 44 is disposed at a position overlapping the cooling fan 15 in the front-rear direction between the cooling fan 15 and the engine 11, and the other end portion 44 </ b> B of the duct member 44 is the engine 11. It is arrange | positioned in the position of the upper side rather than. The duct member 44 includes a front duct portion 45 having a shape extending upward from the end portion 44A as a starting point, and an upper duct portion 46 having a shape extending from the upper end of the front duct portion 45 to the end portion 44B with the upper end as a starting point. Have. In this vehicle, a portion surrounded by the pair of side walls 30, the bottom wall 28 and the lower surface of the bonnet 17 of the duct member 44 is a path through which air passes. That is, in this vehicle, the duct member 44 and the bonnet 17 constitute the air guide duct 40. Further, the end portion 44A side portion of the front duct portion 45 serves as an introduction port 47 for introducing air into the air guide duct 40, and the end portion 44B of the upper duct portion 46 removes the air inside the air guide duct 40 from the outside. It becomes the discharge port 48 which discharges to. Also with such a wind guide duct 40, it is possible to obtain an effect similar to the effect of the wind guide duct 20 of the above-described embodiment. In addition, if a wind guide plate is provided on the duct member 44 of the wind guide duct 40, it is possible to obtain the operational effects according to the operational effects of the wind guide plates 25, 26, and 27 of the embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Engine, 12 ... Engine room, 13 ... Front grille, 14 ... Radiator, 15 ... Cooling fan, 16 ... Alternator, 17 ... Bonnet, 20 ... Air duct, 21 ... Inlet, 22 ... Exhaust , 23 ... front passage part, 24 ... upper passage part, 24A ... front part, 24B ... rear part, 25, 26, 27 ... wind guide plate, 28 ... bottom wall, 29 ... top wall, 30 ... side wall, 40 ... guide Wind duct, 41 ... side wall, 43 ... bottom wall, 44 ... duct member, 44A, 44B ... end, 45 ... front duct part, 46 ... upper duct part, 47 ... inlet, 48 ... outlet.

Claims (1)

A front grill provided at the front end of the vehicle and taking air into the engine compartment;
A heat exchanger provided at a position adjacent to the front grill on the vehicle rear side of the front grill in the engine room;
A cooling fan that is attached to a portion of the heat exchanger on the vehicle rear side and blows air toward the vehicle rear,
An engine mounted on the vehicle rear side of the cooling fan in the engine room;
The vehicle is disposed in the engine room and extends toward the rear of the vehicle, bypassing the engine, and at a position overlapping the cooling fan in the vehicle front-rear direction between the cooling fan and the engine. A vehicle comprising an air guide duct having a shape in which an introduction port opens forward.

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