JP2009061840A - Cooling device for vehicle engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for a vehicle engine that achieves improvement in cooling performance of a radiator while preventing deformation of the radiator during a minor vehicle collision. <P>SOLUTION: The cooling device for a vehicle engine 3 is configured as follows. The engine 3 having an exhaust device (an exhaust manifold 6, a catalyst converter 7) mounted at the vehicle front side is arranged at a position biased on one side in the vehicle width direction. A radiator 8 is arranged between a cross member and the engine 3 in the vehicle front/rear direction so as to extend in front of the exhaust device from the other side in the vehicle width direction. A fan shroud 9 is mounted onto the vehicle rear side surface of the radiator 8. On the other hand, the radiator 8 is inclined with respect to a direction orthogonal to the vehicle front/rear direction so that the outside end part in both end parts in the vehicle width direction of the radiator 8 is located on the vehicle rear side with respect to the inside end part. An extension part 9A is formed in the fan shroud 9 so as to protrude from the radiator 8 to the inside in the vehicle width direction. A guide face 9a is formed in the extension part 9A so as to be juxtaposed in the vehicle width direction with the front face part of the radiator 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an intake device for a vehicle engine in which a fan shroud having a cooling fan is attached to a rear side surface of a radiator.

  FIG. 6 shows an example of a conventional vehicle engine.

That is, FIG. 6 is a plan view of a conventional vehicle engine, and an exhaust device such as an exhaust manifold 106 and a catalytic converter 107 is provided on the front side of the illustrated engine 103, and the front of the engine 103 (FIG. 6). A radiator 108 extending to one side in the vehicle width direction is disposed below (under). Here, in order to prevent the radiator 108 from being deformed at the time of a slight collision of the vehicle, the radiator 108 is set so that the outer end portion of the radiator 108 in the vehicle width direction is positioned on the vehicle rear side with respect to the inner end portion. It is arranged to be inclined by an angle θ shown in the figure with respect to a direction orthogonal to the vehicle longitudinal direction.

  By the way, in Patent Document 1, a radiator cooling fan shroud and a condenser cooling fan shroud are provided on an integral shroud panel so that both shrouds can be configured as necessary. There has been proposed a fan shroud of a heat exchanger in which only the opening for the cooling fan is shielded when not installed.

Further, Patent Document 2 discloses a bypass passage between the part of the outer periphery of the radiator and the fan shroud, behind the portion where the surface temperature of the condenser is high, so that the air passing through the condenser reaches the cooling fan without passing through the radiator. By providing the above, a cooling device for an engine that effectively cools the radiator has been proposed.
Japanese Utility Model Publication No. 61-020430 JP-A-10-054239

  When the configuration in which the radiator 108 is disposed close to the exhaust device such as the exhaust manifold 106 and the catalytic converter 107 of the engine 103 as in the vehicle engine 103 shown in FIG. 6, the radiator 108 is caused by the heat of the exhaust device. There was a problem that the cooling performance deteriorated when heated.

  Further, when the radiator 108 is disposed at an angle θ as shown in FIG. 6, the amount of cooling air passing through the radiator 108 is reduced, and this also causes a problem that the cooling performance of the radiator 108 is lowered. .

  The present invention has been made in view of the above problems, and its object is to cool a vehicle engine that can improve the cooling performance of the radiator while preventing deformation of the radiator at the time of a slight vehicle collision. To provide an apparatus.

In order to achieve the above object, according to the first aspect of the present invention, a cross member that is curved so that both end portions in the vehicle width direction recede toward the rear of the vehicle with respect to the central portion in a plan view is disposed on the vehicle front side. An engine having an exhaust device attached thereto is disposed at a position behind the cross member and on one side in the vehicle width direction, and from the other side in the vehicle width direction between the cross member and the engine in the vehicle front-rear direction. A radiator extending in front of the exhaust device is disposed, and a fan shroud having a cooling fan is attached to the rear side surface of the radiator, while an outer end portion of the radiator in the vehicle width direction is opposed to an inner end portion. A cooling device for a vehicular engine in which the radiator is inclined with respect to a direction orthogonal to the vehicle front-rear direction so as to be positioned on the vehicle rear side.
The fan shroud is formed with an extension portion that protrudes inward in the vehicle width direction from the radiator, and a guide surface that is aligned with the front surface portion of the radiator in the vehicle width direction is formed in the extension portion.

  The invention according to claim 2 is the invention according to claim 1, wherein the guide surface of the extension portion is connected to the fan shroud through a vertical wall portion along a side surface portion of the radiator in the vehicle width direction. And the vertical wall portion are connected through a plurality of ribs extending in a substantially horizontal direction and arranged in the vertical direction at a predetermined interval.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a plurality of openings are formed in the extension.

  According to the first aspect of the present invention, the fan shroud is formed with the extension portion that protrudes inward in the vehicle width direction from the radiator. Therefore, the extension portion can thermally shield the portion adjacent to the radiator exhaust device, Heat transfer from the exhaust device to the radiator can be prevented.

  In addition, when the radiator is inclined with respect to the vehicle longitudinal direction, the amount of cooling air passing through the radiator is reduced. In the present invention, however, the guide surface is aligned with the front portion of the radiator and the front portion of the radiator in the extension portion of the fan shroud. Since the cooling air captured by the guide surface is guided to the radiator, the amount of cooling air passing through the radiator can be increased.

  Furthermore, since the guide surface of the extension is arranged in the vehicle width direction with the front surface portion of the radiator, it is possible to prevent the space between the guide surface and the cross member from being reduced, and the guide surface is cross member when a slight vehicle collision occurs. Occurrence of a situation in which the radiator is moved rearward of the vehicle due to collision with the vehicle is prevented.

  Therefore, it is possible to improve the cooling performance of the radiator by preventing the heat transfer from the exhaust device to the radiator while increasing the amount of cooling air passing through the radiator while preventing the radiator from being deformed at the time of a slight vehicle collision. it can.

  According to the second aspect of the present invention, the rigidity of the guide surface connected to the fan shroud through the vertical wall portion of the radiator can be increased by the plurality of ribs, and the deformation of the guide surface due to the heat received from the exhaust device is prevented. be able to.

  According to the invention of claim 3, by forming a plurality of openings in the extension part of the fan shroud, a part of the traveling wind entering the guide surface of the extension part is guided to the exhaust device through the opening, Since the exhaust device can be cooled by the traveling wind, the temperature rise of the exhaust device, and hence the temperature rise of the radiator can be suppressed.

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

  FIG. 1 is a plan view of a front half of a vehicle on which an engine equipped with a cooling device according to the present invention is mounted, FIGS. 2 and 3 are plan views of a vehicle engine equipped with a cooling device according to the present invention, and FIG. FIG. 5 is a rear perspective view of the fan shroud.

  A vehicle 1 shown in FIG. 1 is a one-box car, and an engine 3 and a transmission 4 connected to the engine 3 are disposed in a horizontal state in an engine room 2 at the front thereof. The illustrated output shaft extends in the vehicle width direction.

  Incidentally, as shown in FIG. 2, a cross member (bumper member) 5 that is curved so that both ends in the vehicle width direction recede toward the rear of the vehicle with respect to the central portion in a plan view is disposed at the front portion of the vehicle 1. In addition, the engine 3 is disposed at a position deviated to the rear side of the cross member 5 and to one side in the vehicle width direction. Here, as shown in FIGS. 2 and 3, an exhaust device such as an exhaust manifold 6 and a catalytic converter 7 connected thereto is provided on the front side of the engine 3.

  In addition, a radiator 8 is disposed between the cross member 5 and the engine 3 in the vehicle front-rear direction so as to extend from the left side in the vehicle width direction to the front of the exhaust device of the engine 3. A fan shroud 9 having a cooling fan (not shown) is attached to the rear side surface. Here, as shown in FIG. 1, the radiator 8 has a vehicle longitudinal direction so that an outer end portion (left end portion) of both ends in the vehicle width direction is positioned on the vehicle rear side with respect to an inner end portion (right end portion). Is inclined with respect to a direction orthogonal to the angle θ shown in the figure.

  Further, as shown in FIG. 1, a shielding plate 10 is disposed in front of the engine 3 and on the right side of the radiator 8. Further, a front grill 11 is provided at the center of the front surface of the vehicle 1 shown in FIG. 1 in the vehicle width direction, and this front grill 11 is used to introduce cooling air (running air) into the engine room 2. An opening 11a is formed. In FIG. 2, 12L and 12R are a pair of left and right lamp support members. In FIG. 3, 13L and 13R are a pair of left and right lamp support brackets, and the upper and lower portions of these lamp support brackets 13L and 13R are connected to each other. Are connected to each other by a horizontal upper member 14 and a lower member 15 shown in FIG.

  By the way, the engine 3 is an in-line four-cylinder engine, and as shown in FIGS. 2 and 3, an air cleaner 16 is disposed on the upper portion thereof, and a resonator 17 is disposed on the left side portion thereof. An air intake duct 18 extending in the vehicle width direction is connected to the right side portion of the front end of the air cleaner 16, and the air intake duct 18 has an end opening obliquely forward of the vehicle.

  An intake manifold 19 is attached to the rear side of the engine 3, and a throttle body 20 is connected to the intake manifold 19. The throttle body 20 and the air cleaner 16 are connected by a flexible intake hose 21, and a branch portion 21 a branched from the intake hose 21 is connected to the resonator 17.

  On the other hand, as shown in FIG. 4, the radiator 8 is configured by attaching an upper tank 8B and a lower tank 8C to the upper and lower sides of the core 8A constituting the heat exchanger portion. As shown in FIG. A cooling water inlet pipe 22 extending from the engine 3 is connected, and a cooling water outlet pipe 23 extending from the lower tank 8 </ b> C is connected to the engine 3. As shown in FIG. 3, a sub tank 24 is disposed behind the radiator 8 in the vehicle, and the sub tank 24 is connected to the radiator 8 by a pipe 25.

  Thus, in the present embodiment, as shown in FIGS. 3 and 4, the fan shroud 9 is formed with an extension portion 9A that protrudes inward in the vehicle width direction from the radiator 8, and the radiator 8 is provided with the extension portion 9A. A guide surface 9a aligned in the vehicle width direction is formed. Here, the guide surface 9a of the extension portion 9A is connected to the fan shroud 9 via the vertical wall portion 9b along the vehicle width direction side surface portion 8a of the radiator 8, and the guide surface 9a and the vertical wall portion 9b are connected to each other. As shown in FIG. 5, the gaps are connected via a plurality of ribs 9 c that extend substantially in the horizontal direction and are arranged at predetermined intervals in the vertical direction.

  As shown in FIG. 4, a plurality of rectangular hole-shaped openings 9d are formed in the extension 9A at appropriate intervals in the vertical direction.

  As described above, in the present embodiment, the fan shroud 9 is formed with the extension 9A that protrudes inward in the vehicle width direction from the radiator 8, so that the extension 9A can be used as an exhaust device (exhaust manifold 6 or catalytic converter 7) of the radiator 8. Adjacent portions can be thermally shielded, and heat transfer from the exhaust device to the radiator 8 can be prevented.

  Further, when the radiator 8 is inclined with respect to the longitudinal direction of the vehicle as in the present embodiment, the amount of cooling air passing through the radiator 8 decreases, but in this embodiment, the extension portion 9A of the fan shroud 9 is reduced. Since the guide surface 9a aligned with the front surface portion of the radiator 8 and the vehicle width direction is formed, the cooling air captured by the guide surface 9a is guided to the radiator 8 as shown by an arrow a in FIG. 3 and passes through the radiator 8. The amount of cooling air can be increased.

  Furthermore, since the guide surface 9a of the extension portion 9A is aligned with the front surface portion of the radiator 8 in the vehicle width direction so as not to protrude significantly from the radiator 8 to the front of the vehicle, the space between the guide surface 9a and the cross member 5 is reduced. This can prevent the occurrence of a situation in which the guide surface 9a collides with the cross member 5 and moves the radiator 8 to the rear of the vehicle at the time of a slight collision of the vehicle 1.

  Therefore, according to the present embodiment, while preventing the radiator 8 from being deformed at the time of a slight collision of the vehicle 1, heat transfer from the exhaust device to the radiator 8 is prevented, and the amount of cooling air passing through the radiator 8 is increased. Thus, the cooling performance of the radiator 8 can be improved.

  In addition, according to the present embodiment, the rigidity of the guide surface 9a connected to the fan shroud 9 via the vertical wall portion 8a of the radiator 8 can be increased by the plurality of ribs 9c, so that the heat received from the exhaust device Deformation of the guide surface 9a can be prevented.

  Furthermore, in this embodiment, since a plurality of openings 9d are formed in the extension 9A of the fan shroud 9 as shown in FIG. 4, a part of the traveling wind entering the guide surface 9a of the extension 9A is shown in FIG. As indicated by an arrow b, the exhaust device can be guided to the exhaust device through the opening 9d, and the exhaust device can be cooled by the traveling wind. For this reason, the temperature rise of an exhaust apparatus and by extension, the temperature rise of the radiator 8 can be suppressed.

It is a top view of the vehicle front half part which mounts the engine provided with the cooling device which concerns on this invention. It is a top view of the engine for vehicles provided with the cooling device concerning the present invention. It is a top view of the engine for vehicles provided with the cooling device concerning the present invention. It is a front view of the engine for vehicles provided with the cooling device concerning the present invention. It is a back perspective view of the fan shroud of the engine for vehicles provided with the cooling device concerning the present invention. It is a top view of the conventional vehicle engine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine room 3 Engine 4 Transmission 5 Cross member 6 Exhaust manifold 7 Catalytic converter 8 Radiator 8A Radiator core 8B Radiator upper tank 8C Radiator lower tank 8a Radiator vehicle width direction side part 9 Fan shroud 9A Fan shroud extension 9a Guide surface of extension portion 9b Vertical wall portion of extension portion 9c Rib of extension portion 9d Opening portion of extension portion 10 Shield plate 11 Front grille 11a Opening portion of front grill 12L, 12R Lamp support member 13L, 13R Lamp support bracket 14 Upper member Reference Signs List 15 Lower member 16 Air cleaner 17 Resonator 18 Intake duct 19 Intake manifold 20 Throttle body 21 Intake hose 21a Intake hose branch 22 Cooling water inlet piping 3 a cooling water outlet pipe 24 subtank 25 pipe

Claims (3)

A cross member that is curved so that both ends in the vehicle width direction in the plan view are retracted rearward of the vehicle with respect to the central portion is disposed at the front of the vehicle, and an engine with an exhaust device attached to the front of the vehicle A radiator that is disposed at a position biased to one side in the vehicle width direction and that extends in front of the exhaust device from the other side in the vehicle width direction between the cross member and the engine in the vehicle longitudinal direction; A fan shroud provided with a cooling fan is attached to the rear side surface of the vehicle, and the radiator is positioned in the vehicle front-rear direction so that the outer end portion of the radiator in the vehicle width direction is positioned on the vehicle rear side with respect to the inner end portion. In a vehicle engine cooling device inclined with respect to a direction orthogonal to
The fan shroud is formed with an extension portion that protrudes inward in the vehicle width direction from the radiator, and a guide surface that is aligned with the front surface portion of the radiator and the vehicle width direction is formed in the extension portion. apparatus.   A guide surface of the extension portion is connected to the fan shroud via a vertical wall portion along a side surface portion of the radiator in the vehicle width direction, and extends between the guide surface and the vertical wall portion in a substantially horizontal direction and is vertical. 2. The vehicle engine cooling device according to claim 1, wherein the cooling device is connected via a plurality of ribs arranged at predetermined intervals in the direction.   The cooling device for a vehicle engine according to claim 1 or 2, wherein a plurality of openings are formed in the extension portion.

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