JP6556605B2 - Air intake duct - Google Patents

Description

  The present invention relates to an intake duct.

  Generally, large transport vehicles such as trucks have more opportunities to travel on unpaved rough roads than ordinary passenger cars, so the engine intake air is not air near the ground, which contains a lot of dust. Therefore, it is preferable to take in a sufficiently high part of the clean air from the ground, and there is a risk of the rainwater and snow jumping together near the ground. It is preferable to incorporate.

  For this reason, in a large transport vehicle, as shown in an example in FIG. 7, an intake duct b extending in the vertical direction is installed on the rear surface of the cab a. A duct main body d having an outer shell structure with an air intake c that is taken in as an intake air for the engine is formed on the upper side, and a louver e that covers the air intake c and prevents entry of air other than outside air. Yes.

  Here, in the intake duct b, the air intake c is greatly opened toward the rear of the vehicle. However, the air intake c is opened to the right side surface on the outer side in the vehicle width direction as shown in the drawing. According to the structure in which the air intake c is opened between two adjacent side surfaces as described above, the air intake c is completely blocked even when the hood of the cargo bed covers the rear surface of the intake duct b. It is possible to prevent the engine from being misfired due to the inability to take in outside air.

  As prior art document information relating to this type of intake duct, the following Patent Document 1 has already been proposed.

Japanese Patent No. 5325764

  However, in the conventional structure as described above, as schematically shown in FIG. 8, the flow of outside air sucked from the adjacent rear surface and right side surface of the air intake c (arrows A and B in FIG. 8). Has collided inside the duct body d, which causes a significant increase in intake resistance.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the intake resistance by avoiding the collision of the flow of outside air sucked from two adjacent side surfaces of the air intake port.

  The present invention is an intake duct that is installed on the rear surface of a cab of a transport vehicle, extends in the vertical direction, and takes in outside air as intake air for an engine from an air intake port that opens between two adjacent side surfaces on the upper side, A duct main body having an outer shell structure with an air intake opening on the upper side and a louver that covers the air intake and prevents entry of air other than outside air, and has a relatively large opening at the air intake. The louver slats covering the other side surface are inclined so that the posture in the width direction forms a downward gradient toward the boundary side between the two adjacent side surfaces.

  Thus, in this way, the flow of outside air sucked in from the side surface that is relatively large of the two adjacent side surfaces of the air inlet is adjacent to the adjacent side surface due to the inclined arrangement of the louver blades. It is bent in the direction to avoid collision with the flow of outside air sucked in from the side, and this prevents collision of the flow of outside air sucked in from two adjacent side surfaces of the air intake port, thereby greatly reducing the intake resistance. become.

  In the present invention, the louver blade covering the side surface of the air intake opening that is relatively small also has a widthwise orientation that is a boundary side between two adjacent side surfaces of the air intake port. It is preferable to be inclined so as to form a downward slope toward the front, and in this way, both the flows of the outside air sucked from the two adjacent sides of the air intake are bent so as to avoid each other, and a more reliable collision Avoidance will be made.

  Further, in the present invention, it is preferable that the louver blades are inclined and arranged in an angle range larger than 0 ° and smaller than 30 ° with respect to the horizontal. In this way, rainwater, snow, etc. It is possible to reliably maintain the original function as a louver that blocks intrusion other than outside air.

  In other words, even if the louver slats are inclined, if they are excessively inclined with respect to the horizontal, intrusion other than outside air such as rainwater and snow easily occurs, and the original function as a louver is impaired. However, if the inclined arrangement of the louver blades is performed in an angle range larger than 0 ° and smaller than 30 °, the original function as a louver is not greatly impaired.

  According to the intake duct of the present invention described above, various excellent effects as described below can be obtained.

  (I) According to the invention described in claim 1 of the present invention, by arranging the louver blades covering the side surface of the air intake opening that is relatively large open, The collision of the flow of the outside air sucked from the two adjacent side surfaces can be avoided to reduce the intake resistance, whereby the fuel consumption of the engine can be greatly improved as compared with the prior art.

  (II) According to the invention described in claim 2 of the present invention, the louver blade covering the side surface of the air intake opening which is relatively small is inclined and arranged, so that the air intake opening is provided. It is possible to realize more reliable collision avoidance by bending both the flows of the outside air sucked from the two adjacent side surfaces of the two so as to avoid each other.

  (III) According to the invention described in claim 3 of the present invention, intrusion other than outside air such as rain water and snow is performed by performing the inclined arrangement of the louver blades in an angle range larger than 0 ° and smaller than 30 °. The original function as a louver can be reliably maintained.

It is a perspective view which shows an example of the form which implements this invention. It is an enlarged view which shows the detail of the air intake duct of FIG. It is the figure which looked at the air intake duct of FIG. 2 from the vehicle rear. It is a schematic diagram which shows the flow of the external air from the two side surfaces in the intake duct of FIG. It is an enlarged view which shows another example of a form of this invention. It is a schematic diagram which shows the flow of the external air from the two side surfaces in the intake duct of FIG. It is a perspective view which shows a prior art example. It is a schematic diagram which shows the flow of the external air from the two side surfaces in the intake duct of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 show an example of an embodiment for carrying out the present invention. As shown in FIGS. 1 to 3, the intake duct 1 in this embodiment is the same as the conventional intake duct b described above with reference to FIG. Similarly to the case, engine air is taken in from the air intake port 3 that is installed on the rear surface of the cab 2 (see FIG. 1) of the transport vehicle and extends in the vertical direction and opens between two adjacent side surfaces on the upper side. A duct main body 4 that forms an outer shell structure by opening the air intake port 3 upward, and a louver 5 that covers the air intake port 3 and prevents intrusion other than outside air. And the wing plate 5a of the louver 5 that covers the side of the air intake 3 that is relatively open is positioned in the width direction (horizontal direction perpendicular to the outside air suction direction) in the adjacent direction. Downward slope toward the boundary between two sides It is characterized in was inclined arranged so as to form.

  That is, in the case of the example shown here, the duct body 4 is formed to have a flat rectangular cross section in the vehicle width direction. In the louver 5 that covers the air intake 3 that is open between the adjacent rear surface and the right side surface, the wing plate 5a that covers the rear surface has a posture in the width direction. Are inclined so as to form a downward slope toward the boundary between the rear surface and the right side surface.

  At this time, the inclined arrangement of the louver 5a of the louver 5 covering the rear surface of the air intake port 3 is preferably performed in an angle range larger than 0 ° and smaller than 30 ° with respect to the horizontal. In the illustrated example, the louver 5b of the louver 5 that covers the right side surface of the air intake port 3 is shown in the drawing. The street remains horizontal.

  Each louver plate 5a of the louver 5 has an inclination angle that forms an upward gradient in the direction of sucking in outside air in order to perform the original function of blocking intrusion other than outside air. Of course, the rear slats 5a are inclined and arranged in the width direction while maintaining an inclination angle.

  Thus, in this way, as schematically shown in FIG. 4, the flow of the outside air sucked from the rear surface of the air intake port 3 adjacent to the rear surface and the right side surface that is relatively open (see FIG. 4). 4 is bent in a direction to avoid collision with the flow of outside air (arrow B in FIG. 4) sucked from the adjacent right side surface due to the inclined arrangement of the louver 5a of the louver 5. Collision of the flow of the outside air sucked from the rear surface and the right side surface adjacent to the inlet 3 is avoided, and the intake resistance is greatly reduced.

  Further, in particular, in this embodiment, since the inclined arrangement of the louver 5a of the louver 5 is performed in an angle range larger than 0 ° and smaller than 30 ° with respect to the horizontal, intrusion other than outside air such as rain water or snow Therefore, it is possible to reliably maintain the original function as the louver 5 that prevents the louver.

  That is, even if the louver 5a of the louver 5 is inclined, if it is excessively inclined with respect to the horizontal, intrusion other than outside air such as rainwater or snow easily occurs, and the original function as the louver 5 is achieved. Although it may be damaged, if the inclined arrangement of the louver 5a of the louver 5 is performed in an angle range larger than 0 ° and smaller than 30 °, the original function as the louver 5 is not greatly impaired.

  Therefore, according to the above-described embodiment, the rear surface and the right side surface of the air intake 3 adjacent to each other are arranged by inclining the louver 5a of the louver 5 that covers the rear surface of the air intake 3 that is relatively large. Can reduce the air intake resistance by avoiding the collision of the flow of outside air sucked in from the engine, so that the fuel efficiency of the engine can be greatly improved than before, and intrusion other than outside air such as rainwater and snow The original function as the louver 5 can be reliably maintained.

  FIG. 5 shows another embodiment of the present invention. In this embodiment, the blade 5b of the louver 5 covering the right side surface of the air intake 3 that is opened relatively small, The posture in the width direction is inclined so as to form a downward slope toward the boundary between the rear surface and the right side surface adjacent to the air intake port 3, and in this way, as schematically shown in FIG. Both the flows of the outside air sucked from the adjacent rear surface and the right side surface of the air intake port 3 (arrows A and B in FIG. 6) are bent so as to avoid each other, so that more reliable collision avoidance is achieved. .

  Note that the intake duct of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Intake duct 2 Cab 3 Air intake 4 Duct body 5 Louver 5a Wing board 5b Wing board

Claims (3)

  An intake duct that is installed on a rear surface of a cab of a transport vehicle and extends in the vertical direction and takes in outside air as intake air for an engine from an air intake port that is open between two side surfaces adjacent to each other. A duct body having an outer shell structure opened to the upper side, and a louver that covers the air intake and blocks intrusion other than outside air, and has a side that is relatively open at the air intake. An air intake duct characterized in that the louvers of the louver to cover are inclined so that the posture in the width direction forms a downward gradient toward the boundary between the two adjacent side surfaces.   As for the louver vane covering the side surface of the air intake opening that is relatively small, the posture in the width direction is inclined downward toward the boundary between the two adjacent side surfaces of the air intake port. The intake duct according to claim 1, wherein the intake duct is inclined.   The intake duct according to claim 1 or 2, wherein the louver blades are inclined and arranged in an angle range larger than 0 ° and smaller than 30 ° with respect to the horizontal.

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