JP6160912B2 - Cold air introduction structure for vehicles - Google Patents

Description

  The present invention relates to a cold air introduction structure for a vehicle that introduces traveling wind from a grill provided on the front surface of a vehicle body and cools a radiator or the like provided inside the vehicle body with the introduced traveling wind.

Generally, in a vehicle, a radiator and a condenser for an air conditioner are arranged behind a bumper beam provided at a front portion of a vehicle body. During the traveling of the vehicle, traveling wind is introduced into the vehicle body from the openings of the front grilles disposed on the upper and lower sides of the bumper beam, and the radiator and the air conditioner condenser are cooled by the traveling wind.
In addition, a plurality of movable fins that can be swung around the horizontal axis center are provided on the traveling wind introduction path, and the amount of air inflow is adjusted with these movable fins, and lift and down force are applied to the vehicle to ensure stable traveling. There is something like that (Patent Document 1).

In Patent Document 2, a front grille for introducing running wind is provided on both upper and lower sides of a bumper beam arranged in the vehicle width direction, and the running wind is sent to a radiator provided in an engine room to be cooled, and a running wind introduction path is provided. The structure provided with the movable member which opens and closes is disclosed.
However, in such a configuration, separation of the air flow is likely to occur with a bumper beam or a movable member with a midway opening. As a result, the turbulent flow area is expanded behind the bumper beam and the movable member, so that there is a problem in that the air resistance increases, the flow velocity becomes slow, and the cooling performance decreases.

  Patent Document 3 discloses a configuration in which the rear region of the bumper beam is a tapered oblique wall, and a protrusion is provided on the surface of the oblique wall. In this configuration, the projections generate turbulence in the air flow that flows along the surface of the inclined wall, thereby preventing the air flow from being separated from the surface of the inclined wall. As a result, it is said that the air flow can be efficiently sent to the rear of the bumper beam, and the radiator and the condenser for the air conditioner can be efficiently cooled.

JP 2008-6855 A JP 2011-105219 A JP 2012-250567 A

  As disclosed in Patent Document 1 and Patent Document 2, when a movable member for adjusting the air volume is provided in the cold air introduction path, the air flow is separated from the bumper beam and the movable member, so that these members The turbulent region expands behind. Particularly, when the movable member has a midway opening degree, a large separation of the airflow occurs. As a result, the cooling performance deteriorates because the turbulent flow and the decelerated air flow strike the radiator and the condenser for the air conditioner. Further, there is a problem that the air resistance to the vehicle body increases due to the arrangement of the movable member.

  In addition, since the structure disclosed by patent document 3 does not provide a movable member, the solution of the said problem produced by the expansion of the turbulent flow area which arises synergistically by arrange | positioning a movable member with a bumper beam, and this phenomenon is suggested. It is not a thing.

  The present invention has been made in view of the above problems, and with a simple configuration, the expansion of a turbulent flow region that occurs behind a bumper beam or a movable member is suppressed, an increase in air resistance to the vehicle body is suppressed, and a radiator is provided. The purpose is to improve the cooling performance of the object to be cooled such as a condenser for an air conditioner.

  In order to achieve the above object, the present invention provides a bumper beam provided in the vehicle width direction on the front surface of the vehicle body, openings provided on the front surface of the vehicle body above and below the bumper beam, and traveling wind flowing from the openings inside the vehicle body. The present invention is applied to a cold air introduction structure for a vehicle having a cold air introduction path that leads to a body to be cooled and a plurality of movable members that are capable of adjusting the amount of traveling air introduced into the cold air introduction path.

In the present invention, the rear region of the bumper beam has a tapered cross-sectional shape toward the rear of the vehicle body. Thereby, it is possible to suppress the traveling wind from being separated from the bumper beam, and to suppress turbulent flow generated at the rear end of the bumper beam. Preferably, if the bumper beam has a tapered airfoil cross-sectional shape, separation of running wind and formation of turbulent flow can be more effectively suppressed.
Further, the plurality of movable members are provided so as to be rotatable around a rotation shaft extending in the vehicle width direction, and are provided in the same region in the front and rear direction of the vehicle body in the upper and lower side regions of the bumper beam. ing. In this manner, by arranging the bumper beam and the movable member, it is possible to impart a rectifying action to the airflow flowing through the cold air introduction path.

  Further, according to the present invention, the first movable member provided in the upper region of the bumper beam and the second movable member provided in the lower region of the bumper beam among the plurality of movable members are reversed by the driving device. When the movable member is rotated from the fully open position to the closed position, the downstream end of the traveling wind of the movable member is rotated in the direction toward the surface of the airfoil cross-sectional shape of the bumper beam.

As a result, in the process of rotating the movable member from the fully open position to the closed position, the flow path area is the same toward the downstream side of the traveling wind between the rear region of the bumper beam and the movable member adjacent to the bumper beam. Alternatively, a gradually decreasing flow path can be formed. Therefore, in such a flow path, it is possible to effectively suppress the separation of the traveling wind from the rear area of the bumper beam and the movable member.
Therefore, expansion of the turbulent flow area behind the bumper beam and the movable member can be effectively suppressed. Therefore, an increase in air resistance in the cold air introduction path can be suppressed, and a decrease in cooling performance for the object to be cooled can be prevented.

As one aspect of the present invention, when the opening degree of the first movable member and the second movable member is within a predetermined range, for example, 20 to 50%, from the relationship between the surface shape of the bumper beam rear region and the inclination angle of the movable member The first movable member and the second movable member can be configured to be rotated in a direction along the surface of the bumper beam rear region.
As a result, when the opening degree of the first movable member and the second movable member is within a predetermined range, the separation of the traveling wind with respect to the bumper beam and the movable member can be effectively suppressed, and the increase in air resistance is suppressed, while the object to be cooled is It is possible to prevent a decrease in cooling performance against

As one aspect of the present invention, the first movable member and the second movable member can be driven by the driving device so that the inclination angle is always symmetrical with respect to the vehicle body longitudinal axis of the bumper beam.
By driving in this way, the synchronous control of the first movable member and the second movable member is facilitated, and a symmetrical flow path is always formed above and below the bumper beam around the vehicle body longitudinal axis. it can. Therefore, since the rectification effect of the traveling wind in the cold wind introduction path can be enhanced, the cooling performance for the object to be cooled can be further enhanced while suppressing an increase in air resistance.

As one aspect of the present invention, the longitudinal length of the vehicle body occupied by the rear region of the bumper beam may be 1 to 3 times the length in the direction intersecting the rotation axis of the movable member.
By adopting such a shape, it is possible to stabilize the traveling wind flowing between the bumper beam rear region and the movable member, and to further enhance the peeling prevention effect.

  According to the present invention, since the expansion of the turbulent flow area can be suppressed behind the bumper beam and the movable member with a simple configuration, the air resistance against the vehicle body can be reduced and the cooling performance against the cooled object can be prevented from being lowered.

It is a perspective view which shows the vehicle body front part structure to which this invention is applied. It is a side view which shows the cold wind introduction structure which concerns on one Embodiment of this invention. It is a front view which shows the drive mechanism of the movable fin of the said cold wind introduction structure.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention to that unless otherwise specified.

  In FIG. 1, a bumper beam 10 projecting forward is provided in the vehicle width direction at a front center portion of the vehicle body. Traveling air intakes 22 and 24 that constitute a part of the cold air introduction structure 20 of the present embodiment are provided in an upper region and a lower region of the bumper beam 10. 28 is provided. Bumpers 12 and 14 extending in the vertical direction are provided on the front surface of the vehicle body on both sides of the traveling wind inlet 24.

  Next, the configuration of the cold air introduction structure 20 of the present embodiment will be described with reference to FIG. In FIG. 2, a frame 30 that defines the upper boundary of the traveling wind inlet 22 and a frame 31 that defines the lower boundary of the traveling wind inlet 24 are provided in the front part of the vehicle body. A cold air introduction path 32 is formed by the frames 30 and 31. In the engine room formed in the inner region of the cold air introduction path 32, objects to be cooled such as a radiator 34 and an air conditioner condenser 36 are provided facing the cold air introduction path 32.

  The rear region 10a of the bumper beam 10 in the longitudinal direction of the vehicle body has an airfoil cross-sectional shape whose vertical shape is symmetrical with respect to the central axis i in the longitudinal direction of the vehicle body. A plurality of first movable fins 38 a are provided in the upper region of the bumper beam 10, and a plurality of second movable fins 38 b are provided in the lower region of the bumper beam 10. These movable fins 38a and 38b are disposed in the same region as the rear region 10a of the bumper beam 10 in the longitudinal direction of the vehicle body. The movable fins 38a and 38b are formed of a long plate-like body extending in the vehicle width direction, and each movable fin has the same shape. The movable fins 38a and 38b are configured to be rotatable around a rotation shaft 39 provided at the center in the width direction.

  Next, based on FIG. 3, the specific configuration of the first movable fin 38a and the second movable fin 38b, and the configuration of the drive mechanism 40 that rotates the first movable fin 38a and the second movable fin 38b. Will be explained. In FIG. 3, the electric cylinder 41 is fixed via a support bar 42. An arm 43 is connected to the piston rod 41 a of the electric cylinder 41. A central portion of the arm 43 is coupled to a rotating shaft 39 of one movable fin. A stop plate 44 is provided in the horizontal direction at the same height with respect to the rotation shaft 39. Further, a stop plate 46 is provided in the vertical direction between the movable fins.

  Stop plates 44 and 46 provided in the upper region of the cool air introduction path 32 are fixed to the frame 30, and stop plates 44 and 46 provided in the lower region of the cool air introduction path 32 are fixed to the frame 31, respectively. Yes. Note that one electric cylinder 41 is provided for each of the first movable fin 38a and the second movable fin 38b. The electric cylinder 41 that drives the first movable fin 38 a is fixed to the bumper beam 10 via the support bar 42, and the electric cylinder 41 that drives the second movable fin 38 b is fixed to the frame 31 via the support bar 42. Has been.

In other movable fins in which the rotation shaft 39 is not coupled to the arm 43, one end of the short arm 48 is coupled to the rotation shaft 39. The other end of each short arm 48 is connected to the other end of the arm 43 by a link bar 50.
Accordingly, the plurality of first movable fins 38a rotate in synchronization with each other and always rotate at the same inclination angle. Similarly, the plurality of second movable fins 38b also rotate in synchronization with each other and always rotate at the same inclination angle.

In addition, the first movable fin 38 a and the second movable fin 38 b are always symmetric with respect to the central axis i of the bumper beam 10 by a control device (not shown) that controls the drive mechanism 40. To work. For example, the first movable fin 38a and the second movable fin 38b rotate so as to be in the fully closed position at the same time, and simultaneously rotate so as to be in the fully open position.
The length L in the vehicle longitudinal direction of the rear region 10a is set to 1 to 3 times the length h in the width direction of the first movable fin 38a and the second movable fin 38b.

In such a configuration, when the first movable fin 38 a and the second movable fin 38 b are locked to the stop plate 44, the cold air introduction path 32 is fully opened. When the two electric cylinders 41 are driven from the fully open state and the piston rod 41a protrudes, it is rotated by 90 ° and is locked to the stop plate 46. In this state, the cold air introduction path 32 is fully closed.
Accordingly, when the first movable fin 38a and the second movable fin 38b are rotated from the fully opened position toward the fully closed position, the traveling wind downstream end 52 of the first movable fin 38a and the second movable fin 38b is provided. Rotates in a direction toward the surface of the rear region 10a having an airfoil cross-sectional shape.

  From the surface shape of the rear region 10a, the first movable fin 38a and the second movable fin 38b are positioned at the most along the surface of the rear region 10a when the opening degree is 20 to 50%, that is, the rear region 10a. The tilt angle is almost parallel.

  During the armoring of the vehicle, the traveling wind f is introduced from the traveling wind intakes 22 and 24 into the cold air introduction path 32, and the radiator 34 and the air conditioner condenser 36 are cooled by the traveling wind f. When increasing the cooling performance of these cooled objects, the opening degree of the first movable fin 38a and the second movable fin 38b is increased, and when decreasing the cooling performance, the first movable fin 38a and the second movable fin 38b. The opening degree of the fin 38b is decreased.

  Although depending on the temperature of the traveling wind f and the vehicle speed, for example, when the coolant temperature flowing through the radiator 34 is 70 ° C., the opening degree of the movable fins 38a and 38b is set to 50%. When the temperature of the cooling water flowing through the radiator 34 is 90 °, the opening degree of the first movable fin 38a and the second movable fin 38b is fully opened. When the on-vehicle air conditioner is operated, the opening degree of the first movable fin 38a and the second movable fin 38b is further increased.

According to the present embodiment, the rear region 10a of the bumper beam 10 has an airfoil cross-sectional shape that tapers toward the downstream side in the flow direction of the traveling wind f. Therefore, the traveling wind f is separated from the rear region 10a. Thus, the expansion of the turbulent flow region t generated at the rear end of the bumper beam 10 can be suppressed.
Further, since the plurality of first movable fins 38a or the plurality of second movable fins 38b always rotate at the same inclination angle, the separation of the traveling wind f can be suppressed between them, so that the rear end of each movable fin The expansion of the turbulent flow region t can be suppressed.

  Further, since the first movable fin 38a and the second movable fin 38b are provided in the same region in the longitudinal direction of the vehicle body in the longitudinal direction of the bumper beam 10, the traveling wind flowing through the cold wind introduction path 32 is provided. A rectifying action can be imparted to f.

  Further, the plurality of first movable fins 38a and the plurality of second movable fins 38b are configured to rotate in opposite directions by the drive mechanism 40, and in the process of rotating from the fully closed position to the fully open position, Between the rear region 10a and the movable fins 38a and 38b, a flow path having the same flow path area or gradually decreasing toward the downstream side of the traveling wind f can be formed. By forming such a flow path, separation of the traveling wind f between the rear region 10a and the movable fin can be effectively suppressed.

  Therefore, it is possible to effectively suppress the expansion of the turbulent flow area behind the bumper beam 10 and the movable fins 38a and 38b. It is possible to prevent the cooling performance of the cooling target such as the radiator 34 and the air conditioner condenser 36 from being lowered.

  Further, when the opening degree is 20 to 50%, the first movable fin 38a and the second movable fin 38b are almost the same as the position along the surface of the rear region 10a of the bumper beam 10, that is, the surface of the rear region 10a. Since it rotates so that it may become the inclination angle close | similar to parallel, peeling of the driving | running | working wind used as the back area | region 10a and movable fin 38a, 38b can be suppressed effectively. Therefore, it is possible to prevent a decrease in cooling performance for the object to be cooled while suppressing an increase in air resistance.

Further, since the first movable fin 38a and the second movable fin 38b are driven by the drive mechanism 40 so that the inclination angle is always symmetrical with respect to the axis line i of the bumper beam 10, the first movable fin 38a is driven. Synchronous control between the fins 38a and the second movable fins 38b is facilitated.
In addition, since the rear region 10a has an airfoil cross-sectional shape in which the vertical shape is symmetric with respect to the central axis i, a symmetrical flow path can always be formed above and below the bumper beam 10. Therefore, the effect of rectifying the traveling wind f in the cold wind introduction path 32 can be further enhanced. Thereby, the cooling performance with respect to a to-be-cooled body can further be improved.

  Furthermore, the vehicle body longitudinal direction length L of the rear region 10a of the bumper beam 10 is set to 1 to 3 times the width direction length h of the first movable fin 38a and the second movable fin 38b. The traveling wind f flowing between 10a and the movable fins 38a and 38b can be stabilized, and the peeling prevention effect can be further enhanced.

  According to the present invention, it is possible to suppress the traveling wind from being separated from the bumper beam and the movable member with a simple configuration, and it is possible to improve the cooling performance with respect to the object to be cooled such as the radiator and the condenser for the air conditioner.

DESCRIPTION OF SYMBOLS 10 Bumper beam 10a Rear area | region 12, 14 Bumper 20 Cold wind introduction structure 22, 24 Running wind inlet 26, 28 Front grille 30, 31 Frame 32 Cold wind introduction path 34 Radiator 36 Air conditioner capacitor 38a 1st movable fin 38b 2nd movable Fin 39 Rotating shaft 40 Drive mechanism 41 Electric cylinder 41a Piston rod 42 Support bar 43 Arm 44, 46 Stop plate 48 Short arm 50 Link rod 52 Running wind downstream end f Running wind i Central axis t Turbulent flow area

Claims (4)

A bumper beam provided in the vehicle width direction on the front surface of the vehicle body, an opening provided on the front surface of the vehicle body above and below the bumper beam, and cold air introduction that guides running wind flowing from the opening to a body to be cooled provided inside the vehicle body A cold wind introduction structure for a vehicle having a road and a plurality of movable members capable of adjusting the amount of traveling wind introduced into the cold wind introduction path,
The rear region of the bumper beam has a tapered cross-sectional shape toward the rear of the vehicle body,
The plurality of movable members are provided so as to be rotatable about a rotation shaft extending in the vehicle width direction, and are provided in the same region in the front and rear direction of the bumper beam in the upper and lower side regions of the bumper beam. And
Among the plurality of movable members, the first movable member provided in the upper region of the bumper beam and the second movable member provided in the lower region of the bumper beam are rotated in directions opposite to each other, When the movable member is rotated from the fully open position to the closed position, a drive device is provided that rotates the traveling wind downstream end of the movable member in a direction toward the surface of the rear region of the bumper beam. The cold air introduction structure of the vehicle which does.   When the opening degree of the first movable member and the second movable member is within a predetermined range, the first movable member and the second movable member are rotated in a direction along the surface of the rear region of the bumper beam. The cold air introduction structure for a vehicle according to claim 1, wherein the structure is configured as described above. The driving device includes:
The said 1st movable member and said 2nd movable member are driven so that an inclination angle may always become symmetrical with respect to the vehicle body longitudinal direction axis line of a bumper beam. Cold air introduction structure for vehicles.   The length of the vehicle body in the front-rear direction occupied by the rear region of the bumper beam is 1 to 3 times the length of the movable member in the direction intersecting the rotation axis. The cold air introduction structure for a vehicle according to the item.

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