JP7100822B2 - Vehicle front structure - Google Patents

Description

The present disclosure relates to the front structure of a vehicle equipped with a front underlamp protector, a heat exchanger and an air guide.

Patent Document 1 describes a vehicle including a front under lamp rotor attached below the front bumper along the vehicle width direction and a radiator attached to the vehicle body frame along the vehicle width direction behind the front under lamp rotor. Have been described. Further, the state in which the front under lamp protector is arranged diagonally rearward and downward of the front bumper is shown in the figure.

Japanese Unexamined Patent Publication No. 2010-149611

In the structure of Patent Document 1, since the front underlamp rotor is arranged diagonally below and behind the front bumper, the distribution direction of the traveling wind toward the front underlamp rotor below the front bumper is changed by the front underlamp rotor. Then, it circulates diagonally upward and backward above the front underrun protector. Therefore, the running wind does not direct to the lower region of the heat exchanger (radiator), and the cooling efficiency of the heat exchanger may decrease.

Therefore, an object of the present invention is to provide a front structure of a vehicle capable of improving the cooling efficiency of the heat exchanger.

In order to achieve the above object, the front structure of the vehicle according to the first aspect of the present invention includes a front underlamp rotor, a heat exchanger, an air guide, and a second air guide . The front underlamp protector is supported on the vehicle body side and extends in the vehicle width direction at the lower part of the front end of the vehicle. The heat exchanger is arranged behind the front underlamp protector and supported on the vehicle body side. The air guide is arranged above the front underlamp protector and in front of the heat exchanger and is supported on the vehicle body side. The second air guide is arranged behind the front underlamp rotor and the air guide and in front of the rear surface of the heat exchanger and is supported on the vehicle body side.

The air guide has a guide surface that intersects the vertical direction and faces downward. The guide surface is located above the lower end of the heat exchanger and behind the front end of the front underlamp rotor, and the rising angle of the running wind flowing diagonally upward and backward above the front underlamp rotor is changed to the descending side. do. The second air guide has a wind guide surface that intersects the front-rear direction and faces forward. The wind guide surface is arranged below the rear end of the guide surface and extends downward from the front underramp rotor, and guides the traveling wind flowing backward under the front underramp rotor upward.

In the above configuration, when the vehicle is traveling forward, the distribution direction of the traveling wind flowing rearward toward the front underramp rotor is changed diagonally upward and backward by the front underramp rotor, and then the ascending angle is guided by the air guide. It is changed to the descending side depending on the surface. Therefore, the traveling wind can be directed to the lower region of the heat exchanger, and the cooling efficiency of the heat exchanger can be improved.

A second aspect of the present invention is the front structure of the vehicle of the first aspect, which comprises a front bumper. The front bumper is supported on the vehicle body side above the front of the front underlamp protector and extends in the vehicle width direction. The guide surface of the air guide is arranged in the distribution path of the traveling wind that flows diagonally upward and backward between the front bumper and the front under lamp protector.

In the above configuration, when the vehicle is traveling forward, the distribution direction of the traveling wind that flows backward toward the front underramp protector under the front bumper is changed diagonally upward and backward by the front underramp rotor, and the front bumper and front are changed. After flowing toward the guide surface of the air guide between the under lamp protector and the guide surface, the ascending angle is changed to the descending side by the guide surface. Therefore, the traveling wind flowing between the front bumper and the front underlamp protector can be surely directed to the lower region of the heat exchanger, and the cooling efficiency of the heat exchanger can be improved.

A third aspect of the present invention is the vehicle front structure of the first or second aspect, wherein the heat exchanger has a first heat exchanger and a second heat exchanger. The second heat exchanger is arranged so as to overlap the front side of the first heat exchanger, and the lower part of the front surface of the first heat exchanger is exposed forward below the lower end of the second heat exchanger.

In the above configuration, the traveling wind can be directed to the lower part of the front surface of the first heat exchanger by the guide surface of the air guide, and the cooling efficiency of the first heat exchanger can be improved.

A fourth aspect of the present invention is the front structure of the vehicle according to any one of the first to third aspects, which comprises a cross member. The cross member extends in the vehicle width direction to form a vehicle body frame. The air guide is fixed to the cross member.

In the above configuration, since the air guide is fixed to the cross member, it is not necessary to provide a bracket or the like for fixing the air guide, and it is possible to suppress an increase in the number of parts and a complicated structure.

According to the present disclosure, the guide surface of the air guide can direct the traveling wind to the lower region of the heat exchanger, and the cooling efficiency of the heat exchanger can be improved.

It is an external perspective view which looked at the front structure of the vehicle which concerns on one Embodiment of this invention from diagonally front and lower. It is an external perspective view which removed the front bumper and FUP from the front structure of FIG. It is a side sectional view of the front structure of FIG. It is a schematic diagram which includes the side cross section of the structure of the modification.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In each figure, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side, and the arrows in FIGS. 3 and 4 indicate the flow of the traveling wind. Further, in the following description, the front-rear direction means the front-rear direction of the vehicle, and the left-right direction means the left-right direction in a state of facing the front of the vehicle.

The vehicle 1 according to the present embodiment is a cab-over type truck in which the cab (not shown) is generally arranged above the engine (not shown), and supports the cab, the engine, and the like as shown in FIG. It includes a vehicle body frame 2, a front bumper 3 extending in the vehicle width direction at the lower part of the front end of the vehicle 1, a front underlamp rotor (FUP) 4, and a heat exchanger 5 arranged behind the FUP 4.

As shown in FIGS. 1 and 2, the vehicle body frame 2 has a pair of left and right side members 11 extending in the front-rear direction of the vehicle 1 on both sides in the vehicle width direction and left and right side members 11 extending in the vehicle width direction. It has a first cross member 12 that connects the front end portions of the vehicle, and a second cross member 13 that extends behind the first cross member 12 in the vehicle width direction and connects the left and right side members 11. At the front end of the vehicle 1, the upper and lower surfaces of the left and right side members 11, the upper and lower surfaces of the first cross member 12, and the upper and lower surfaces of the second cross member 13 are located at substantially the same height.

As shown in FIGS. 1 and 3, the front bumper 3 is arranged above the front of the FUP 4 so as to cover the front end of the vehicle body frame 2 from the front, and is fixed to the vehicle body frame 2. The front ends of the left and right side members 11 project forward from the first cross member 12 (see FIG. 2), and the central portion of the front bumper 3 in the vehicle width direction is fixed to the first cross member 12 via the bumper bracket 6. (See Fig. 3).

The front bumper 3 is formed with a ventilation opening 7 for introducing a running wind toward the rear heat exchanger 5 (mainly the front surface 15a of the intercooler 15 described later). The ventilation opening 7 of the present embodiment is arranged above the lower surface of the first cross member 12.

The FUP 4 is a rod-shaped box body having a rectangular cross section with both ends closed in the vehicle width direction, extends in the vehicle width direction below the rear of the front bumper 3, and is fixed to the left and right side members 11 via the left and right FUP brackets 8. Will be done. The FUP4 regulates the movement of the above-mentioned other vehicle to the rear of the FUP4 when the vehicle 1 collides with another vehicle (not shown) such as a passenger car having a vehicle height lower than that of the vehicle 1, and the vehicle 1 has a FUP4. Prevent other vehicles from sneaking downwards.

As shown in FIGS. 1 to 3, the heat exchanger 5 includes a radiator (first heat exchanger) 14 and an intercooler (second heat exchanger) 15, and is behind the FUP 4 and has a second cross member. It is arranged between the left and right side members 11 in a state of being separated rearward from 13. The intercooler 15 may be referred to as a charge air cooler.

The radiator 14 is a rectangular plate-shaped structure having a front surface 14a and a rear surface 14b intersecting the front-rear direction, and the total length of the radiator 14 in the vertical direction is set to be longer than the total length of the intercooler 15 in the vertical direction. The radiator 14 is arranged behind the second cross member 13 between the left and right side members 11, and is fixed to the left and right side members 11 in a posture slightly inclined rearward toward the upper side. In this state, the upper end of the radiator 14 is located above the upper surface of the vehicle body frame 2 (the upper surfaces of the side member 11 and the second cross member 13), and the lower end of the radiator 14 is located above the lower surface of the vehicle body frame 2 (side members 11 and the upper surfaces of the second cross member 13). It is located below each lower surface of the second cross member 13. Cooling water that has been heated by an engine or the like is recovered and flows into the radiator 14. The inflowing cooling water is cooled by the cooling air (running air) passing from the front surface 14a to the rear surface 14b of the radiator 14 while flowing through the radiator 14, and is supplied again from the radiator 14 to the engine or the like.

The intercooler 15 has a front surface 15a and a rear surface 15b that intersect with each other in the front-rear direction, and is a rectangular plate-like structure smaller than the radiator 14, and the total length of the intercooler 15 in the vertical direction is the vertical direction of the radiator 14. Shorter than the total length. The intercooler 15 is arranged between the left and right side members 11 between the second cross member 13 and the front surface 14a of the radiator 14, and is arranged with respect to the left and right side members 11 in a posture slightly inclined rearward toward the upper side. Is fixed. In this state, the upper end of the intercooler 15 is located above the upper surface of the vehicle body frame 2 (the upper surfaces of the side member 11 and the second cross member 13), and the lower end of the intercooler 15 is the lower surface of the vehicle body frame 2 (side members). It is located slightly below the lower surface of each of the 11 and the second cross member 13) and above the lower end of the radiator 14. That is, the intercooler 15 is arranged so as to overlap the front side of the radiator 14, and the lower portion of the front surface 14a of the radiator 14 is exposed forward below the lower end of the intercooler 15. High-temperature intake gas supercharged by an engine supercharger (not shown) flows into the intercooler 15. The inflowing intake gas is cooled by the cooling air (running air) passing from the front surface 15a to the rear surface 15b of the intercooler 15 while flowing through the intercooler 15, and is supplied to the engine or the like.

When the vehicle 1 travels forward, a traveling wind flows diagonally upward and backward between the front bumper 3 and the FUP 4 (see FIG. 3), and the first baffle plate (air guide) is connected to the traveling wind distribution path 9. 21 is arranged. The first baffle plate 21 is a rectangular plate material long in the vehicle width direction, is fastened and fixed to the lower surface of the first cross member 12, and is inclined diagonally backward and downward from the rear end edge of the lower surface of the first cross member 12. And extend. That is, the first baffle plate 21 is arranged above the FUP 4 and in front of the heat exchanger 5 (intercooler 15) and is fixedly supported on the vehicle body side. Ribs 25 for ensuring rigidity and the like are bent downward at both end edges of the first baffle plate 21 in the vehicle width direction.

The lower surface of the first baffle plate 21 constitutes a flat guide surface 22 that intersects the vertical direction and faces downward. The guide surface 22 is arranged in the distribution path 9 above the lower end of the heat exchanger 5 (lower end of the radiator 14) and behind the front end of the FUP 4, and the rising wind flowing diagonally upward and backward above the FUP 4. The angle is changed to the descending side (diagonally downward and rearward in this embodiment). The guide surface 22 may be arranged substantially horizontally (substantially parallel to the lower surface of the first cross member 12), or may be a non-flat surface such as a curved surface.

A second baffle plate 23 is provided below the front of the radiator 14. The second baffle plate 23 is a rectangular plate material long in the vehicle width direction like the first baffle plate 21, and its upper end is fixed to the vehicle body side via the second baffle plate bracket 26 and is a radiator. It extends downward from the lower end of 14. The front surface of the second baffle plate 23 is inclined substantially parallel to the front surface 15a of the radiator 14 (slightly inclined rearward toward the top), and constitutes a wind guide surface 24 that intersects the front-rear direction and faces forward. ..

According to the present embodiment, when the vehicle 1 is traveling forward , the distribution direction of the traveling wind flowing backward toward the FUP 4 is changed diagonally upward and backward by the FUP 4, and the first is between the front bumper 3 and the FUP 4. 1 After flowing toward the guide surface 22 of the baffle plate 21, the ascending angle thereof is changed to the descending side by the guide surface 22. Further, the traveling wind flowing rearward under the FUP 4 is introduced upward by the wind guide surface 24 of the second introduction plate 23 and rises, and merges with the traveling wind flowing diagonally downward and rearward by the first baffle plate 21. Flows toward the lower region of the heat exchanger 5. Therefore, the traveling wind flowing between the front bumper 3 and the FUP 4 and the traveling wind flowing below the FUP 4 can be reliably directed to the lower region of the heat exchanger 5 (the lower portion of the front surface 14a of the radiator 14). , The cooling efficiency of the radiator 14 can be improved.

Further, since the first baffle plate 21 is fixed to the first cross member 12 forming the vehicle body frame 2, it is not necessary to provide a bracket or the like for fixing the first baffle plate 21, and the number of parts is increased and the structure is increased. It is possible to suppress the complexity of.

Although the present invention has been described above based on the above-described embodiment, the present invention is not limited to the contents of the above-described embodiment, and can be appropriately modified without departing from the present invention. That is, it goes without saying that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are included in the scope of the present invention.

For example, in the present embodiment, the first baffle plate 21 in which the inclination angle of the guide surface 22 is constant has been described, but the inclination angle of the guide surface 22 may be changed stepwise or continuously. As an example, as shown in FIG. 4, the inclination angle with respect to the horizontal direction can be increased or decreased (in the illustrated example, it extends substantially horizontally like a flat plate when not heated, and bends when heated so that the guide surface 22 moves diagonally downward and backward. The first baffle plate 21 may be formed of a shape memory alloy (inclined), and the shape of the first baffle plate 21 may be changed by heating from a heater 31 arranged in the vicinity of the first baffle plate 21. .. In this case, the inside of the intercooler 15 and the control device (ECU) 34 having the determination unit 32 and the control unit 33, the water temperature sensor 35 for detecting the temperature on the outlet side of the cooling water flowing through the radiator 14, and the inside of the intercooler 15. A gas temperature sensor 36 that detects the temperature on the outlet side of the circulating intake gas is provided, and the cooling capacity of the radiator 14 is sufficient based on the water temperature detected by the water temperature sensor 35 and the gas temperature detected by the gas temperature sensor 36. The determination unit 32 determines whether or not the radiator 31 is present, and the control unit 33 controls the on / off of the heater 31 according to the determination result of the determination unit 32 (when the cooling capacity of the radiator 14 is sufficient, the heater 31 is used. It can be configured to turn off and turn on the heater 31 if it is insufficient). Further, the inclination angle of the guide surface 22 may be made variable by changing the posture with respect to the vehicle body frame 2 by a motor or the like without changing the shape of the first baffle plate 21.

Further, the first heat exchanger and the second heat exchanger are not limited to the radiator 14 and the intercooler 15, respectively, and may be a condenser for an air conditioner, an oil cooler, or the like. Further, the heat exchanger 5 may be a single heat exchanger (for example, a radiator in which substantially the entire front surface is open) instead of a plurality of heat exchangers 5.

INDUSTRIAL APPLICABILITY The present invention is applicable to a vehicle provided with a heat exchanger behind the front underlamp protector.

1: Vehicle 2: Body frame 3: Front bumper 4: FUP (front underlamp protector)
5: Heat exchanger 6: Bumper bracket 7: Ventilation opening 8: FUP bracket 11: Side member 12: First cross member 13: Second cross member 14: Radiator (first heat exchanger)
14a: Front surface of radiator 14b: Rear surface of radiator 15: Intercooler (second heat exchanger)
15a: Front surface of the intercooler 15b: Rear surface of the intercooler 21: First baffle plate (air guide)
22: Guide surface 23: Second baffle plate 24: Baffle surface 25: Rib 26: Second baffle plate bracket 31: Heater 32: Judgment unit 33: Control unit 34: Control device (ECU)
35: Water temperature sensor 36: Gas temperature sensor

Claims (4)

A front underlamp protector that is supported by the vehicle body and extends in the vehicle width direction at the bottom of the front end of the vehicle,
A heat exchanger located behind the front underrun protector and supported on the vehicle body side,
An air guide that has a guide surface that intersects the vertical direction and faces downward, is arranged above the front underlamp rotor and in front of the heat exchanger, and is supported on the vehicle body side.
It has a wind guide surface that intersects the front-rear direction and faces forward, and is arranged behind the front underlamp rotor and the air guide and in front of the rear surface of the heat exchanger to be supported on the vehicle body side. Equipped with 2 air guides ,
The guide surface is arranged above the lower end of the heat exchanger and behind the front end of the front underlamp rotor, and determines the rising angle of the traveling wind that flows diagonally upward and backward above the front underlamp rotor. Change to the descending side,
The wind guide surface is arranged below the rear end of the guide surface and extends downward from the front underramp rotor, and guides the traveling wind flowing backward below the front underramp rotor upward.
The front structure of the vehicle is characterized by that. The front structure of the vehicle according to claim 1.
It is equipped with a front bumper that is supported on the vehicle body side above the front of the front under lamp protector and extends in the vehicle width direction.
The guide surface is a front structure of a vehicle, characterized in that the guide surface is arranged in a distribution path of a traveling wind that flows diagonally upward and backward between the front bumper and the front underlamp protector. The front structure of the vehicle according to claim 1 or 2.
The heat exchanger has a first heat exchanger and a second heat exchanger that is arranged so as to overlap the front side of the first heat exchanger.
The front lower portion of the first heat exchanger is a front structure of the vehicle characterized in that it is exposed forward below the lower end of the second heat exchanger. The front structure of the vehicle according to any one of claims 1 to 3.
Equipped with a cross member that extends in the vehicle width direction to form the vehicle body frame,
The front structure of the vehicle, characterized in that the air guide is fixed to the cross member.

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