JP2015193293A - air guide duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air guide duct achieving the improvement of supply performance to an air cooling member of travel air while suppressing enlargement of a size of the air guide duct.SOLUTION: A hood inner duct 4 has a duct lower surface 41, and a duct upper surface 42 extending nearly in parallel to the duct lower surface 41 at an upward interval. The duct lower surface 41 and the duct upper surface 42 extend backward from the forward ends in an engine room 1, and each of the rear end parts are slowly bent downward, and extend to an intercooler 3. The rear end part of the duct upper surface 42 extends longer than the rear end part of the duct lower surface 41. The rear end parts of the duct lower surface 41 and the duct upper surface 42 have a lower inclination surface 46 and an upper inclination surface 47 inclined inward so as to be approached to each other as they are advanced to the intercooler 3.

Description

  The present invention relates to an air guide duct for guiding traveling air to an air cooling member disposed in an engine room.

  For example, a vehicle equipped with an engine with a supercharger (turbocharger, supercharger) may be equipped with an intercooler that cools air whose temperature has risen due to compression of the supercharger. A vehicle in which an air-cooled intercooler is horizontally arranged is provided with a cooler duct for guiding traveling wind to the intercooler.

  Although the thing of various structures is provided for the cooler duct, in an example, it is arrange | positioned in an engine room (for example, refer patent document 1). One end of the cooler duct is disposed at the front part in the engine room, and is opened forward as an intake for traveling wind. The middle part of the cooler duct is fixed to the vehicle body, extends in the front-rear direction, and the other end is fixed to the intercooler. Thus, when the vehicle is traveling, the traveling wind is taken into the cooler duct from the intake port, and the traveling wind is supplied to the intercooler via the cooler duct.

Japanese Patent Laid-Open No. 3-524

  For example, when the intercooler is horizontally disposed, the cooler duct disposed in the engine room needs to be largely curved downward in the vicinity of the intercooler. When curved in this way, the size of the cooler duct in the vertical direction increases. In addition, if the cooler duct cannot be bent greatly downward due to layout restrictions in the engine room, there is a large gap between the other end of the cooler duct and the intercooler. The air volume of the traveling wind decreases.

  An object of the present invention is to provide an air guide duct that can improve the performance of supplying traveling air to an air cooling member while suppressing an increase in size of the air guide duct.

  In order to achieve the above object, an air duct according to the present invention is an air duct for guiding traveling air to an air cooling member disposed in an engine room, and includes a first duct surface and a first duct surface. And a second duct surface that is opposed to the first duct surface and a second duct surface, and a space through which traveling wind flows is formed between the first duct surface and the second duct surface, and the first duct surface and the second duct The surface extends into the engine room, each one end is disposed at the front part in the engine room, each other end is curved toward the second duct surface and extends toward the air cooling member, and the first duct The other end portion of the surface extends longer than the other end portion of the second duct surface, and each other end portion of the first duct surface and the second duct surface has an inclined surface that is inclined inward as it approaches the air cooling member. ing.

  According to this configuration, the first duct surface and the second duct surface are opposed to each other with a space therebetween, and are extended into the engine room. The other end portions of the first duct surface and the second duct surface are curved toward the second duct surface side and extend toward the air cooling member. And each other end part of a 1st duct surface and a 2nd duct surface has an inclined surface which inclines inside so that it may mutually adjoin as it approaches an air cooling member. Therefore, the traveling wind flowing between the first duct surface and the second duct surface is contracted when flowing between the inclined surfaces, and after the flow velocity is increased, the traveling wind is supplied to the air cooling member.

  Further, the traveling wind that flows along the first duct surface that is relatively outside in the radius of curvature direction has a higher wind speed than the traveling wind that flows along the second duct surface that is relatively inside. Therefore, the traveling wind that flows along the first duct surface becomes the mainstream. Due to the inclined surface of the second duct surface, the direction of the traveling wind flowing along the second duct surface can be directed to the mainstream. As a result, the traveling wind flowing along the second duct surface can be put on the main stream and can be satisfactorily supplied to the air cooling member.

  Furthermore, the other end of the first duct surface extends longer than the other end of the second duct surface. Thereby, it can suppress that the mainstream of the driving | running | working wind which flows along a 1st duct surface leaks outside from between a 1st duct surface and an air cooling member, and can supply a driving | running wind to an air cooling member favorably.

  Therefore, the air cooling member can be efficiently cooled by the traveling wind. For example, when the air cooling member is an intake system member (intercooler, air cleaner, etc.) of the engine, the combustion efficiency of the engine can be improved by improving the cooling of the air cooling member, and the fuel efficiency can be improved. it can.

  In addition, since the other end of the first duct surface extends longer than the other end of the second duct surface, and the inner surface of the other end has an inclined surface, the first duct surface and the second duct surface are The direction of the traveling wind can be changed without greatly curving.

  Therefore, it is possible to improve the supply performance of the traveling wind to the air cooling member by changing the direction of the traveling wind while suppressing the increase in the size of the air duct.

  According to the present invention, it is possible to improve the supply performance of the traveling wind to the air cooling member by changing the direction of the traveling wind while suppressing the increase in the size of the air guide duct.

It is sectional drawing which shows the structure in the engine room provided with the air guide duct which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing a configuration in an engine room provided with an air guide duct according to an embodiment of the present invention.

  The engine room 1 is provided in the front part of the vehicle, and the upper part thereof is covered with a hood 2 so as to be opened and closed. An engine with a supercharger is arranged in the engine room 1 (not shown). Further, in the engine room 1, an intercooler 3 that cools air that has risen in temperature due to compression of the supercharger and a hood inner duct 4 that guides the traveling wind to the intercooler 3 are provided.

  The intercooler 3 is disposed above the engine and is integrally covered with the engine by the engine cover 5. The intercooler 3 has a large number of fins, and is provided in an inclined state so that the rear side of the heat exchange surface 31 from which the fins are exposed is lifted.

  An opening 51 for exposing the heat exchange surface 31 of the intercooler 3 is formed in the engine cover 5. The front wall portion 52 that forms the front edge of the opening 51 extends in a direction orthogonal to the heat exchange surface 31, is bent in the middle, and is inclined so that the upper end enters the inside of the opening 51 toward the upper side. Yes. The rear wall portion 53 that forms the rear edge of the opening 51 extends longer than the front wall portion 52 in a direction orthogonal to the heat exchange surface 31, the middle portion is bent, and the upper end portion of the opening 51 extends upward. Inclined to enter inside.

  The hood inner duct 4 extends in the front-rear direction so as to follow the inner surface of the hood 2. The hood inner duct 4 has a duct lower surface 41 and a duct upper surface 42 that extends substantially parallel to the duct lower surface 41 with an interval therebetween. A space between the left end edge of the duct lower surface 41 and the left end edge of the duct upper surface 42 is blocked by a duct left side surface (not shown). A space between the right edge of the duct lower surface 41 and the right edge of the duct upper surface 42 is blocked by a duct right surface 43. Thus, the hood inner duct 4 has a tubular shape extending in the front-rear direction.

  The front end of the hood inner duct 4 is disposed on the rear side of the front end portion 21 of the hood 2 and opens downward. The rear end of the hood inner duct 4 is arranged at a front side with respect to the opening 51 of the engine cover 5. Specifically, the duct lower surface 41 extends horizontally from the front end, bends and extends obliquely upward, and the rear end is gently curved downward. The rear end of the duct lower surface 41 is disposed at a position spaced slightly above the front side with respect to the upper end of the front wall portion 52 of the engine cover 5. The duct upper surface 42 extends substantially linearly from the front end to the rear upper side, and the rear end portion is gently curved downward. The duct upper surface 42 has a curved rear end extending longer than the duct lower surface 41, so that the rear end of the duct upper surface 42 is a plane including the upper end of the front wall portion 52 and the upper end of the rear wall portion 53 of the engine cover 5. And on the engine cover 5 side with respect to a plane passing through the rear end of the duct lower surface 41 and at a position slightly spaced forward from the upper end of the rear wall portion 53 of the engine cover 5. Have

  A lower projection 44 having a triangular cross section that protrudes toward the inside of the hood inner duct 4 as it approaches the opening 51 of the engine cover 5 is formed at the rear end of the duct lower surface 41. On the other hand, at the rear end portion of the duct upper surface 42, an upper projection 45 having a triangular cross section that protrudes inside the hood inner duct 4 as it approaches the opening 51 is formed. Thus, the rear end portions of the duct lower surface 41 and the duct upper surface 42 have a lower inclined surface 46 and an upper inclined surface 47 that are inclined inward of the hood inner duct 4 as approaching the opening 51. The cross-sectional area of the rear end portion of the hood inner duct 4 is narrowed as the opening 51 is approached.

  A bumper grill 61 is formed on the bumper 6 provided at the front end of the vehicle. In the engine room 1, an air guide plate 7 extending from the vicinity of the front end portion of the duct lower surface 41 toward the bumper grill 61 is provided.

  When the vehicle is traveling, traveling wind flows into the engine room 1 through the bumper grill 61 and the gap between the hood 2 and the bumper 6. The traveling wind flowing from the bumper grill 61 is guided along the wind guide plate 7 to the front end of the hood inner duct 4. The traveling wind flowing from the gap between the hood 2 and the bumper 6 is guided to the front end of the hood inner duct 4 by the shape of the bumper 6. Thus, the traveling wind is taken into the hood inner duct 4 from the opening at the front end of the hood inner duct 4 and flows in the hood inner duct 4 (between the duct lower surface 41 and the duct upper surface 42) toward the intercooler 3.

  The duct lower surface 41 and the duct upper surface 42 have a lower inclined surface 46 and an upper inclined surface 47 that incline inward so as to approach each other as they approach the intercooler 3 (opening 51). Therefore, the traveling wind flowing between the duct lower surface 41 and the duct upper surface 42 is contracted when flowing between the lower inclined surface 46 and the upper inclined surface 47, and after the flow velocity increases, the opening 51 Is supplied to the intercooler 3.

  Further, the traveling wind that flows along the duct upper surface 42 that is relatively outside in the radius of curvature direction has a higher wind speed than the traveling wind that flows along the duct lower surface 41 that is relatively inside. Therefore, the traveling wind flowing along the duct upper surface 42 becomes the mainstream. Due to the lower inclined surface 46 of the duct lower surface 41, the direction of the traveling wind flowing along the duct lower surface 41 can be directed to the mainstream. As a result, traveling wind flowing along the duct lower surface 41 can be put on the mainstream.

  Further, the rear end portion of the duct upper surface 42 extends longer than the rear end portion of the duct lower surface 41. As a result, even if there is a gap between the front end of the hood inner duct 4 and the opening 51 of the engine cover 5, the main stream of the traveling wind flowing along the duct upper surface 42 is the duct upper surface 42 and the rear wall portion of the engine cover 5. It is possible to suppress leakage from between 53 and the outside. Therefore, even if the engine vibrates, it is possible to satisfactorily supply the traveling air to the intercooler 3 while preventing the hood inner duct 4 and the engine cover 5 from contacting each other.

  Therefore, the intercooler 3 can be efficiently cooled by the traveling wind. With good cooling of the intercooler 3, the combustion efficiency of the engine can be improved, and as a result, the fuel consumption can be improved.

  Further, the rear end portion of the duct upper surface 42 extends longer than the rear end portion of the duct lower surface 41, and the duct lower surface 41 and the duct upper surface 42 have a lower inclined surface 46 and an upper inclined surface 47, respectively. The direction of the traveling wind can be changed without greatly curving the upper surface 42 and the duct lower surface 41.

  As a result, it is possible to improve the supply performance of the traveling wind to the intercooler 3 by changing the direction of the traveling wind while suppressing an increase in the size of the hood inner duct 4.

  Further, since the direction of the traveling wind can be changed, the rear end portion of the hood inner duct 4 is orthogonal to the heat exchange surface 31 in order to apply the traveling wind to the heat exchange surface 31 of the intercooler 3 at a right angle. You don't have to turn to Therefore, the direction of the rear end portion of the hood inner duct 4 can be made closer to the direction of vibration generated in the engine, thereby preventing contact between the hood inner duct 4 and the engine cover 5 due to engine vibration. Since contact can be prevented, the rear end portion of the hood inner duct 4 can be brought close to the engine cover 5 to reduce the distance between them, and the travel wind from between the hood inner duct 4 and the engine cover 5 can be reduced. Leakage can be suppressed.

  As mentioned above, although one Embodiment of this invention was described, this invention can also be implemented with another form.

  For example, in the above-described configuration, the lower projection 44 and the upper projection 45 are formed at the rear end portions of the duct lower surface 41 and the duct upper surface 42, respectively, so that the duct lower surface 41 and the duct upper surface 42 are respectively formed at the rear end portions. A lower inclined surface 46 and an upper inclined surface 47 are provided. The lower inclined surface 46 and the upper inclined surface 47 may be formed by bending the rear end portions of the duct lower surface 41 and the duct upper surface 42 to the inside of the hood inner duct 4, respectively.

  Further, although the intercooler 3 is taken up as an example of the air cooling member, the air cooling member may be a member other than the intercooler 3 such as an air cleaner as long as air cooling is required.

  In addition, various design changes can be made to the above-described configuration within the scope of the matters described in the claims.

1 Engine room 3 Intercooler (air cooling member)
4 Hood inner duct (wind duct)
41 Duct bottom surface (second duct surface)
42 Duct upper surface (first duct surface)
46 Lower inclined surface (inclined surface)
47 Upper inclined surface (inclined surface)

Claims (1)

An air guide duct for guiding running air to an air cooling member disposed in the engine room,
Having a first duct surface and a second duct surface facing the first duct surface with a space therebetween;
Between the first duct surface and the second duct surface, a space through which the traveling wind flows is formed,
The first duct surface and the second duct surface are extended into the engine room, each one end portion is disposed at a front portion in the engine room, and each other end portion is on the second duct surface side. Curving and extending towards the air cooling member,
The other end of the first duct surface extends longer than the other end of the second duct surface,
Each of the other end portions of the first duct surface and the second duct surface has an inclined surface that inclines inward as approaching the air cooling member.

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