JP2011127449A - Cooling device for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for an engine which facilitates easy assembling and reduction of weight by eliminating connection with a vehicle body side while ensuring performance of the cooling device by integrally attaching the cooling members of the engine as a component and by applying a structure in which hot air in an engine room is not taken in by an intercooler and a radiator by attaching an elastic sealing material C which is brought into contact with an opening part of a vehicle body to an intake introduction part of a radiator shroud. <P>SOLUTION: In a cooling device integrating structure, the radiator 7, the intercooler 10, a fan 16, a fan shroud 9, a fan driving mechanism 14 and a driving mechanism support stay 15 and the like are integrally attached to a radiator frame 6 as the component and attached to a chassis frame 20 and arranged substantially in parallel with a side surface of the vehicle body 2. A first sealing material is interposed between a body side lid and an outside air introduction port of the radiator shroud so that return of the hot air in the engine room 3 is prevented. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine cooling device mounting structure for cooling engine cooling water mounted on a rear engine bus or the like.

In the engine room located at the rear of the rear engine bus body, the engine, a radiator that cools the engine cooling water, a fan that forcibly ventilates the cooling fins of the radiator to promote heat exchange, and an intake air that supercharges the engine Important devices for driving a vehicle (bus) such as an intercooler and a transmission for cooling the vehicle are concentrated. Further, the outer periphery of the engine room is sound-insulated by the vehicle body wall in order to prevent operating noise of the engine and other devices from leaking directly to the outside of the vehicle. Therefore, it is necessary for the radiator and the intercooler to prevent hot air blown from the radiator from being sucked (returned) into the radiator and the intercooler again.
For this reason, a so-called radiator shroud is installed across the vehicle body side and the chassis frame side to prevent hot air from rewinding in the engine room by arranging a shielding plate around the outer periphery of the radiator on the intake upstream side of the radiator. ing.
Therefore, the radiator mounting structure and the radiator shroud structure are complicated, and much time is required for assembly work.

FIG. 7 shows the rear side of the engine room 99 part of the current rear engine bus (hereinafter, the left and right standards are described as front, back, left and right in the state of being seated in the driver's seat), and the side wall of the vehicle body is omitted.
100 is an intercooler, 105 is fixed in the engine room 99 to the right and left chassis frame outer surfaces of a pair of left and right chassis frames (not shown) spaced in the vehicle longitudinal direction and in the vehicle width direction. This is a radiator support that extends outward from the vehicle. A rear engine bus engine (not shown) is mounted between the left and right chassis frames in the vehicle width direction.
The other end of the radiator support 105 is fastened to a bracket 110 fixed to the lower frame 104 of the vehicle body 111. 106 and 107 are arranged in the vertical direction of the vehicle body 111, and their lower end portions are fixed to the lower frame 104, and intermediate portions are fixed to a floor frame 112 disposed substantially parallel to the lower frame 104, These are vehicle body pillars A and B constituting the part.
Reference numeral 102 denotes a fan shroud 103 and a radiator frame that rotatably supports a radiator fan (not shown) in the fan shroud 103 with a space from the inner peripheral surface of the fan shroud 103.

  The intake air upstream side of the intercooler 100 (the front side of the intercooler 100) is connected to a radiator shroud A109 that cuts off hot air from the engine room 99 along the outer periphery of the intercooler 100, and a front edge of the radiator shroud A109. The radiator shroud C113 coupled to the outer wall (not shown) of the vehicle body 111, the lower edge of the intercooler 100, the lower edge of the radiator shroud A109, and the radiator shroud C113 are connected and joined to the outer wall of the vehicle body 111 to shield the lower part. The radiator shroud B108, the upper edge of the intercooler 100, the upper edge of the radiator shroud A109, the upper edge of the radiator shroud C113, and the outer wall of the vehicle body 111 are joined to the outer wall of the radiator 111 to shield the upper portion from the engine room 3. Consists out with Udo B (not shown), an intake system upstream of the intercooler 100 is disposed so as to surround a plurality of the radiator shroud along the outer periphery of the intercooler 100. Intake air is taken in through an intake hole opened in a side wall portion of the vehicle body 111 surrounded by the vehicle body pillars A 106 and B 107, the lower frame 104 and the floor frame 112. The plurality of radiator shrouds are connected to the vehicle body 111 and the chassis frame.

  However, the bus is assembled in the order in which the chassis frame side is assembled and the vehicle body side is covered thereon. First, the radiator 101 and the fan support (including the fan shroud 103 and the fan) are attached to the radiator frame 102 and the radiator support 105 fixed to the chassis frame side. Next, the vehicle body side is placed so as to cover the vehicle body from above, and the radiator support bracket 110 fixed to the vehicle body side lower frame 104, the other end of the radiator support 105, a plurality of radiator shrouds, and the side wall of the vehicle body are connected. The structure is fastened.

The mounting portion has a structure in which the vehicle body side 111 and the chassis frame side are separately assembled and fastened with bolts, and the mounting holes between the radiator support bracket 110 and the other end of the radiator support 105 are difficult to match due to manufacturing errors. I have a hard time. Further, there are problems such as misalignment of joints between the intercooler 100 and the plurality of shrouds.
Furthermore, the capacity of the radiator has increased due to exhaust gas purification measures and the like, and in some cases, the conventional place cannot be stored depending on the size (output) of the engine.

In addition, a seal rubber is used to shield between the radiator shroud and the vehicle body, and an error between the vehicle body and the chassis frame is absorbed to absorb hot air rewinding from the engine room 3 to the radiator.
As a prior art document, Japanese Patent Laid-Open No. 11-36866 (Patent Document 1) has been proposed.

JP-A-11-36866

  And in patent document 1, since the clearance gap is absorbed by the flexible member in order to absorb the attachment error of the member attached between the vehicle body side and the chassis frame side, the flexible material prevents deformation due to wind pressure or the like. In addition, the heavy radiator mounted on the chassis frame must be cantilevered, and the rigidity of the mounting part on the chassis frame must be greatly increased. There are problems such as durability of the cooling device for the engine due to vibrations of the engine, and a reduction in shielding performance of the shielding device due to vibrations of the radiator.

  The present invention has been made to solve such problems. By integrating an engine cooling device such as a radiator, an intercooler, a fan, and a fan shroud into a single component and making it parallel to the chassis frame. By reducing the amount of overhang in the vehicle width direction of the cooling device and mounting only on the chassis frame side, it eliminates coupling with the vehicle body side, facilitates assembly, reduces weight, and simplifies the mounting structure An object of the present invention is to provide an engine cooling device capable of reducing costs.

  The present invention achieves such an object. In a cooling device for an engine, a radiator frame that is framed in a rectangular shape and the rectangular surface is disposed along a side wall of the vehicle, and a vehicle width direction of the radiator frame A radiator fixed to an outer side surface for cooling cooling water of the engine of the vehicle; an intercooler for cooling intake air of the engine disposed outside the radiator in the vehicle width direction; and provided on a side wall portion of the vehicle, A body side lid having an opening for intake of a radiator; a radiator shroud interposed between the intercooler and the opening; and having an outside air inlet facing the opening; A seal member interposed between an outer peripheral portion of the opening and an outer peripheral portion of the introduction port, and fixed to the outer peripheral portion; the radiator and the radiator shroud; Characterized in that a radiator shroud bracket integrally sandwich the intercooler in secured in the longitudinal direction of the vehicle outer side and the radiator and the radiator shroud.

With such a configuration, the first seal member is interposed between the outside air introduction port of the radiator shroud and the opening of the vehicle side wall, so that hot air in the engine room enters the intercooler and the radiator from the radiator shroud. Can be effectively prevented.
Furthermore, since the intercooler and the radiator shroud are integrally sandwiched by the radiator shroud bracket together with the radiator, each member can be assembled to the chassis in the form of an assembly, so that the assembly between the parts can be assembled with high accuracy. .

In the present invention, preferably, an intake pipe for guiding intake air from the intercooler to the engine is attached to a lower portion of the radiator shroud.

With such a configuration, the intake pipe that guides intake air from the intercooler to the engine is fixed to the lower part of the radiator shroud, so that the number of assembling steps when assembling the cooling apparatus to the chassis can be reduced and the cooling apparatus including the intake pipe The whole becomes compact, and a good effect can be obtained for ventilation in a narrow engine room.
Furthermore, compared to the conventional structure in which the support stay for the intake pipe is attached to the chassis side, the structure is such that the intake pipe is fixed to a bracket extending from the radiator shroud, so that the cost of parts can be reduced.

In the present invention, preferably, the body side lid is mounted on a side wall of the vehicle body via a hinge so as to be releasable outwardly of the vehicle.

With such a configuration, the deformation margin of the sealing material is increased, and a gap between the sealing material and the vehicle side wall is prevented from being generated due to a manufacturing error between the vehicle body and the chassis frame. When assembling to the side, by performing the assembling work with the body side lid opened to the outside of the vehicle, it is possible to prevent the side wall of the vehicle from being deformed and damaged.
In addition, maintenance and inspection of the cooling device is facilitated.

Since the first seal member is interposed between the outside air introduction port of the radiator shroud and the opening of the vehicle side wall, it is possible to effectively prevent the hot air in the engine room from entering the intercooler and the radiator from the radiator shroud. .
Furthermore, since the intercooler and radiator shroud are integrally sandwiched by the radiator shroud bracket together with the radiator, the assembly accuracy between the parts can be improved, the gap between the parts can be reduced, and the hot air from rewinding can be reduced. .

The left side view of the whole vehicle which concerns on embodiment of this invention is shown. The assembly state external fitting figure of the cooling device concerning the embodiment of the present invention is shown. The top view of the assembly state of the cooling device concerning the embodiment of the present invention to a chassis frame is shown. The perspective view of the state which assembled the radiator frame which concerns on embodiment of this invention to the chassis frame is shown. The perspective view from the vehicle width direction inner side of the radiator shroud which concerns on embodiment of this invention is shown. The perspective view from the vehicle body inner side shows the opening part of the vehicle body side surface which concerns on embodiment of this invention. The assembly state to the vehicle of a prior art Example is shown.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

(Embodiment)
FIG. 1 is a left side view of the entire vehicle according to the embodiment. In the case of the present embodiment, outside air that cools the intercooler 10 and the radiator 7 is introduced from an opening 33 that opens to the body side lid 30 that is a side wall of the vehicle body 2 at the rear of the vehicle 1. When assembling the vehicle body 2 to the chassis frame 20, the body side lid 30 avoids interference with a seal material C 13 which is a first seal member described later, and is installed on the upper side of the body side lid 30 to service and inspect the cooling device 4. The hinge 35 (see FIG. 6) arranged can be opened upward.

An engine room 3 surrounded by a vehicle body 2 and a chassis frame 20 is formed at the rear portion of the vehicle 1. As shown in FIG. 3, an engine 19 for traveling the vehicle 1 between the pair of left and right chassis frames 20 has an interval in the vehicle width direction along the longitudinal direction of the vehicle 1 in the engine room 3. Are arranged so that the crankshaft is along the front-rear direction of the vehicle 1.
A cooling device 4 is disposed on the left outer side of the pair of left and right chassis frames 20. As shown in FIG. 2, the cooling device 4 has a radiator 7 fixed to the left side in the vehicle width direction of the radiator frame 6 (see FIG. 4), and an intercooler 10 is further arranged on the left side in the vehicle width direction of the radiator 7. A sealing material A <b> 11 made of a flexible material is interposed between the intercooler 10.
The sealing material A11 is fixed to the four sides along the outer periphery of the rectangular radiator 7.
The hot air in the engine room 3 is not sucked into the radiator 7 from the periphery of the radiator 7. As the material of the sealing material A11, for example, NBR (nitrile rubber) or the like may be foamed to increase flexibility.

Further, a radiator shroud 8 is mounted on the left side in the vehicle width direction of the intercooler 10. A sealing material B12 made of a flexible material is also interposed between the intercooler 10 and the radiator shroud 8, and hot air in the engine room 3 is sucked into the intercooler 10 from around the intercooler 10 and the radiator shroud 8. There is no such thing. The material is the same as the sealing material A11.
The radiator shroud 8 has a shape having a hollow portion in the shape of a substantially quadrangular pyramid whose outer side in the vehicle width direction is reduced.
On the surface of the radiator shroud 8 on the intercooler 10 side, a sealing material B12 is fixed to four sides along the outer peripheral portion of the radiator shroud 8.
As shown in FIG. 2, the radiator 7 and the radiator shroud 8 are fastened to the radiator 7 and the radiator shroud 8, and the radiator 7 and the radiator shroud 8 are fastened by the radiator shroud brackets 5 arranged at four locations on the upper and lower sides of the vehicle front-rear direction. Thus, the intercooler 10 is firmly sandwiched.

Further, an outside air introduction port 81 facing the opening 33 of the vehicle body 2 is disposed at the left end of the radiator shroud 8 in the vehicle width direction. The outside air introduction port 81 has elasticity on the inner wall surface of the vehicle body 2. A seal material C13, which is a first seal member that comes into contact, is attached. This is also to prevent hot air from the engine room 3 from entering the radiator shroud 8. The material is the same as the sealing material A11.
The sealing material C13 has a structure (having sufficient thickness in the vehicle width direction) such that the sealing material C13 comes into contact with the inner wall surface of the vehicle body 2 with elasticity.
Further, as shown in FIG. 5, a pair of mounting brackets 84 for attaching a dustproof net 85 is disposed in the longitudinal direction of the vehicle on the inside of the radiator shroud 8 in the vehicle width direction. The dust-proof net 85 can be fastened to the mounting bracket 84 with a bolt.
Since the dust-proof net 85 is installed in the radiator shroud 8, no new space is required, so that it has a good effect on ventilation in a narrow engine room.
Further, a reinforcing plate 86 is fixed to substantially the entire lower side of the lower side of the radiator shroud 8 having a substantially quadrangular pyramid shape. This is because a plurality of stays 87 that support an intake pipe 89 that guides intake air cooled by the intercooler 10 shown in FIG. 2 to the engine are fastened to the radiator shroud 8 by bolts 83. Reference numeral 90 denotes a rubber pipe that connects both the outer fitting to the intercooler 10 and the other fitting to the intake pipe 89, and the outer fitting portions at both ends are fixed by clamps 92 and 91, respectively.
Since the structure is such that the intake pipe 89 of the intercooler 10 is fastened to the radiator shroud 8, when the cooling device 4 is assembled, the work can be made efficient by assembling the intake pipe 89 together and the intake pipe 89 is connected to the cooling device 4. Since it fits compactly, it has a good effect on ventilation in a narrow engine room.

On the other hand, as shown in FIG. 6, the body side lid 30 of the vehicle body 2 has a side lid 31 that forms an outer wall, and a frame-shaped reinforcing member 32 that is open at the center in the vehicle width direction inside of the side lid 31. . Further, a frame-shaped seal receiving portion 33 is formed on the inner side in the vehicle width direction of the reinforcing member 32. The frame-shaped seal receiving portion 33 is formed with a frame-shaped lid seal surface 34 that comes into contact with the seal material C13.
The lid seal surface 34 is formed in order to improve the sealing effect by making the side surface of the vehicle body 2 have a three-dimensional curved surface and making a planar contact with the sealing material C13.
This can absorb manufacturing errors of the chassis frame 20, assembly errors of the radiator frame 6 to the chassis frame 20, manufacturing errors of the vehicle body 2, and the like.
Therefore, at the time of assembly, the body side lid 30 of the vehicle body 2 having the opening 33 and the hinge 35 disposed on the upper side of the body side lid 30 are maintained and assembled in an open state. By lowering the vehicle body 2 from above and closing the body side lid 30 after the assembly is completed, the sealing material C13 is not damaged.
Further, after the vehicle body 2 is assembled, the outer wall portion of the vehicle body 2 opened upward is lowered so that the sealing material C13 comes into contact with the inner wall surface of the vehicle body 2 with elasticity.

A fan shroud 9 is fixed to the right side of the radiator frame 6 in the vehicle width direction (the vehicle inner side).
In addition, the fan 16 in which the inner wall surface of the fan shroud 9 and the tip of the blade are disposed with a slight gap and the conversion unit 141 of the fan drive mechanism 14 that drives the fan 16 are attached to and supported by the radiator frame 6. The drive mechanism support stay 15 is provided. (See Figure 3)
Since the fan shroud 9 and the drive mechanism support stay 15 that supports the fan 16 and the conversion unit 141 are attached to the radiator frame 6, the gap between the inner wall surface of the fan shroud 9 and the tip of the blades of the fan 16 is managed small. Therefore, it is possible to effectively suck the cooling air passing through the intercooler 10 and the radiator 7.
The drive mechanism support stay 15 is an outer peripheral portion of the fan shroud 9, and one end of the pipe shape is fixed to each of the rectangular squares of the radiator frame 6, and the other end has four to four pipes. The inner portion of the fan shroud 9 extends in a circular arc shape at the inner side in the width direction, and the fan 16 and the conversion unit 141 of the fan driving mechanism 14 that drives the fan are supported by four pipes near the center.
The cooling device 4 includes a radiator frame 6, a radiator 7, an intercooler 10, a radiator shroud 8, a fan shroud 9, a fan 16, a fan drive mechanism 14, a drive mechanism support stay 15, and seal materials A, B, C, 11, 12, 13.

A structure in which the radiator frame 6 is mounted on the chassis frame 20 will be described with reference to FIG.
Frame stays 27, 27 are fastened by bolts to brackets 61 (not shown) arranged at intermediate portions of longitudinal frames 62, 63 arranged in the vehicle front-rear direction extending in the vertical direction of the radiator frame 6. The chassis frame 20 has a rear intermediate cradle 25 fixed to the rear side wall of the chassis frame 20, an air cleaner support 29 that is also fixed to the side surface of the chassis frame 20 and supports an air cleaner (not shown), and the chassis frame 20. A front intermediate receiving base 31 fixed to the front wall of the engine room 3 constituting the engine room 3 that is fixed and coupled to a pillar (not shown) on the vehicle body 2 side, and a stay 30 also fixed to the front wall are prepared. Has been.
The frame stays 27, 27 of the radiator frame 6 of the cooling device 4 in which the radiator 7, the intercooler 10 and the like are integrally assembled are fastened to the rear intermediate receiving base 25 and the front intermediate receiving base 31 via the rubber packing 26. To do. Next, the upper end portion of the rear vertical frame 62 is fastened to the bracket 28 fixed to the air cleaner support 29. Finally, the upper end of the front vertical frame 63 is fastened to the stay 30 fixed to the front wall.
FIG. 4 shows the coupling structure of the chassis frame 20 and the radiator frame 6. The actual assembly of the chassis frame 20 includes the radiator 7, the radiator 7, the intercooler 10, and the like. In the state of the assembled cooling device 4, it is assembled to the chassis frame 20 via the radiator frame 6.
As a result, the cooling device 4 is supported at four points on the left chassis frame 20 and can reliably function without being affected by the traveling vibration of the vehicle 1.

FIG. 3 is a plan view showing a state in which the cooling device 4 according to the embodiment is assembled to the chassis frame, and a method for driving the fan 16 will be described.
The fan drive mechanism 14 has a pulley portion that transmits the rotational force from the engine 19 to the pulley A17 and the pulley B21 by the belt 18, and the rotation of the pulley B21 is arranged substantially parallel to the crankshaft (not shown) of the engine 19. The shaft 142 extending forward in the vehicle front-rear direction, the conversion unit 141 that converts the rotation from the engine 19 to a right angle direction at the front end of the shaft 142 and rotationally drives the fan 16, and the front end of the shaft 142 and the conversion unit 141 And a spherical universal joint 143 interposed in the connecting portion.
The purpose of using the spherical universal joint 143 to connect the conversion mechanism and the shaft is to prevent the pulley 21 and the belt 18 from slipping. That is, since the pulley 21 is supported so that tension is applied to the belt 18, the rotation can be smoothly transmitted to the converting portion 141 even if the pulley 21 is displaced.
Therefore, a universal joint is provided at the portion where the driving force is input to the conversion portion 141 even if the pulley 21 fluctuates in the vehicle width direction when the engine shakes due to engine torque fluctuation and the engine crankshaft moves in the left-right direction. Therefore, the structure is such that the fluctuation in the vehicle width direction of the drive shaft disposed in parallel with the engine crankshaft can be effectively absorbed.

According to the present embodiment, the cooling device 4 includes a radiator frame 6, a radiator 7, an intercooler 10, a radiator shroud 8, a fan shroud 9, a fan 16, a fan drive mechanism 14, a drive mechanism support stay 15, and seal materials A and B. , C, 11, 12, 13 are integrated to support the chassis frame 20 alone, and the body-side lid 3 is formed with a frame-shaped lid seal surface 34 that comes into contact with the sealing material C 13. 4 and the body side lid 3 are improved in sealing performance, so that hot air from the engine room 3 can be reliably prevented from rewinding, and the performance of the cooling device 4 can be ensured.
Further, the assembly can be performed without being influenced by the manufacturing error between the vehicle body 2 and the chassis frame 20, and the assembly can be facilitated and the number of steps can be reduced. In contrast to the structure in which the stay for supporting the heavy cooling device 4 is arranged substantially at right angles to the chassis frame 20, the cooling device 4 is made substantially parallel to the chassis frame 20. Since only the short intermediate cradle 25 and the front intermediate cradle 31 are arranged directly from the front and rear chassis frames 20, the weight and cost can be reduced.

  Cooling device for the purpose of improving the assembling property and cooling capacity of the cooling device arranged in the engine room 3 of the rear engine bus

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Engine room 4 Cooling device 5 Radiator shroud bracket 6 Radiator frame 7 Radiator 8 Radiator shroud 9 Fan shroud 10 Intercooler 14 Fan drive mechanism 15 Drive mechanism support stay 20 Chassis frame 30 Body side lid 31 Side lid 34 Lid seal surface

Claims (3)

  In an engine cooling apparatus, a rectangular frame is provided, and the rectangular surface is disposed along a side wall of the vehicle, and a cooling water for the engine of the vehicle fixed to an outer surface in the vehicle width direction of the radiator frame. A radiator that cools the engine, an intercooler that cools the intake air of the engine that is disposed on the outer side in the vehicle width direction of the radiator, and a body that is provided on a side wall of the vehicle and that has an opening for intake of the radiator A side lid, a radiator shroud interposed between the intercooler and the opening and facing the opening; and an outer periphery of the opening and an outer periphery of the inlet A seal member interposed therebetween and fixed to the outer peripheral portion; and the radiator and the radiator shroud fixed to the outer side surface in the vehicle front-rear direction. Motor the engine cooling system being characterized in that a radiator shroud bracket integrally sandwich the intercooler between the radiator shroud.   2. The engine cooling device according to claim 1, wherein an intake pipe for guiding intake air from the intercooler to the engine is attached to a lower portion of the radiator shroud.   The engine cooling apparatus according to claim 1 or 2, wherein the body side lid is mounted on a side wall of a vehicle body via a hinge and can be released outwardly of the vehicle.

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