Heat damage prevention structure for vehicle

Abstract

To provide a heat damage preventing structure of a vehicle capable of obtaining sufficient cooling effect even if there is an obstacle in the middle of a ventilation passage to an exhaust component.SOLUTION: A side 8C of one end portion of the fan shroud 8 in the vehicle-width direction faces the discharge component 5 in the front-rear direction and is covered with a heat shield plate 9. A front grille 3 having a ventilation part 3A for taking traveling wind into the engine room 10 from the vehicular front side is arranged in front of the radiators 7. The ventilation portion 3A is disposed outside one end portion of the fan shroud 8 in the vehicle-width direction. The ventilation part 3A is provided with an inclined wall 3B for deflecting the traveling wind toward the exhaust gas component 5. In the heat shield plate 9, a cut-off part 3A is formed by cutting off a part overlapping with a ventilation passage of traveling wind connecting the ventilation part 9A and the exhaust gas component 5.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a heat damage prevention structure for a vehicle. [Background technology]

[0002] Patent Document 1 describes a technology in which a front grille is positioned to the right of the exhaust components, which become hot, and a ventilation section is provided inclined toward the exhaust components, thereby directing the wind from the ventilation section toward the exhaust components. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-164059 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional technology described in Patent Document 1, if other components are placed along the ventilation path from the ventilation section to the exhaust component, the other components may act as obstacles, blocking the wind as the vehicle moves, and there is a risk that a sufficient cooling effect will not be achieved.

[0005] The present invention was made in light of the above-mentioned circumstances, and aims to provide a heat damage prevention structure for a vehicle that can obtain sufficient cooling effect even if there is an obstacle in the way of the ventilation path to the exhaust parts. [Means for solving the problem]

[0006] The present invention is a heat damage prevention structure for a vehicle in which an engine, exhaust components through which exhaust gas from the engine passes, a radiator, and a fan shroud are housed in an engine compartment at the front of the vehicle, the fan shroud is arranged behind the radiator, and the exhaust components are arranged behind the fan shroud, wherein one end of the fan shroud in the vehicle width direction faces the exhaust components in the fore-and-aft direction and is covered by a heat shield, a front grille having a ventilation section that takes in running air from the front of the vehicle into the engine compartment is arranged in front of the radiator, the ventilation section is arranged outside the one end of the fan shroud in the vehicle width direction, the ventilation section is provided with an inclined wall that deflects the running air toward the exhaust components, and the heat shield has a cut-out section formed by removing a portion that overlaps with the ventilation path of the running air connecting the ventilation section and the exhaust components. [Effects of the Invention]

[0007] As described above, according to the present invention, it is possible to provide a heat damage prevention structure for a vehicle that can obtain a sufficient cooling effect even if there is an obstacle in the way of the ventilation path to the exhaust parts. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a vehicle equipped with a heat damage prevention structure for a vehicle according to one embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along the line II-II of the vehicle heat damage prevention structure shown in FIG. [Figure 3] FIG. 3 is a rear view of a heat damage prevention structure for a vehicle according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A vehicle heat damage prevention structure according to one embodiment of the present invention includes an engine, exhaust components through which engine exhaust gas passes, a radiator, and a fan shroud housed in an engine compartment at the front of the vehicle, the fan shroud being located behind the radiator, and the exhaust components being located behind the fan shroud, wherein one end of the fan shroud in the vehicle width direction faces the exhaust components in the front-to-rear direction and is covered by a heat shield, a front grille having a ventilation section that draws airflow from the front of the vehicle into the engine compartment is located in front of the radiator, the ventilation section is located outboard of the one end of the fan shroud in the vehicle width direction, the ventilation section has an inclined wall that deflects the airflow toward the exhaust components, and the heat shield has a cutout that removes a portion that overlaps with a ventilation path of the airflow connecting the ventilation section and the exhaust components. As a result, the vehicle heat damage prevention structure according to one embodiment of the present invention can achieve sufficient cooling effect even if an obstacle is present in the ventilation path to the exhaust components. [Example]

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle heat damage prevention structure according to an embodiment of the present invention will now be described with reference to the drawings.

[0011] 1 to 3 are diagrams showing a heat damage prevention structure for a vehicle according to one embodiment of the present invention. In Fig. 1 to 3, the up / down, front / rear, left / right directions refer to the front / rear direction of the vehicle, the left / right direction of the vehicle (vehicle width direction) and the up / down direction of the vehicle (vehicle height direction).

[0012] First, the configuration will be described. In Fig. 1, a front bumper 2 and a front grille 3 are provided at the front end of a vehicle 1. The front grille 3 is disposed above the front bumper 2. A radiator 7 is provided behind the front bumper 2 and the front grille 3.

[0013] In FIG. 2, an engine compartment 10 is provided behind a front bumper 2 and a front grille 3 at the front of the vehicle 1.

[0014] The engine compartment 10 houses the engine 4, a catalyst case 5 through which exhaust gas from the engine 4 passes, a radiator 7, and a fan shroud 8. The catalyst case 5 houses a catalyst that purifies the exhaust gas. The catalyst case 5 constitutes an exhaust part of the present invention.

[0015] The engine 4 includes a cylinder block (not shown), a cylinder head connected to the top of the cylinder block, a cylinder head cover connected to the top of the cylinder head, and an oil pan connected to the bottom of the cylinder block. The cylinder block is provided with multiple cylinders (not shown). Pistons (not shown) are housed in the cylinders and reciprocate vertically relative to the cylinders. The pistons are connected to a crankshaft (not shown) via connecting rods (not shown), and the reciprocating motion of the pistons is converted into rotational motion of the crankshaft via the connecting rods. The engine 4 is arranged transversely in the engine compartment 10 so that the multiple cylinders are aligned in the width direction of the vehicle 1.

[0016] A fan shroud 8 is disposed behind the radiator 7. The fan shroud 8 has a cover portion 8A that covers the rear surface of the radiator 7, and a cylindrical portion 8B that allows air to pass rearward.

[0017] An electric cooling fan (not shown) is provided between the fan shroud 8 and the radiator 7, and the cooling fan draws air in from the front of the radiator 7 and blows it out to the rear of the fan shroud 8. The catalyst case 5 is disposed behind the fan shroud 8.

[0018] One end 8C (right end) of the fan shroud 8 in the vehicle width direction faces the catalyst case 5 in the front-rear direction and is covered by a heat shield plate 9. This allows the heat shield plate 9 to block heat radiated from the catalyst case 5 to the one end 8C of the fan shroud 8, thereby protecting the one end 8C from heat.

[0019] 1 and 2, the front grille 3 is disposed in front of the radiator 7. The front grille 3 has a ventilation section 3A, which takes in airflow from the front of the vehicle into the engine compartment 10.

[0020] 2 and 3, the ventilation section 3A is disposed outside (on the right side of) one end 8C of the fan shroud 8 in the vehicle width direction.

[0021] The ventilation section 3A is provided with an inclined wall 3B that deflects the traveling wind toward the catalyst case 5. More specifically, the inclined wall 3B guides the traveling wind taken in from the front diagonally rearward to the left where the catalyst case 5 is located, rather than directly toward the rear.

[0022] By providing the inclined wall 3B in the ventilation section 3A, the traveling wind deflected by the inclined wall 3B reaches the catalyst case 5 as shown by the ventilation path indicated by arrow A in Fig. 2, and cools the catalyst case 5. Meanwhile, the catalyst case 5 is also cooled by the air that passes through the radiator 7 and is blown out from the fan shroud 8.

[0023] By guiding the traveling wind to the catalyst case 5 by the inclined wall 3B of the ventilation section 3A, the catalyst case 5 can be cooled not only by the high-temperature air blown out from the fan shroud 8 but also by the low-temperature traveling wind guided from the ventilation section 3A.

[0024] In this way, by cooling the catalyst case 5 with the wind generated by running the vehicle, it is possible to prevent thermal fatigue of the catalyst case 5 due to the surface of the catalyst case 5 becoming hot, thereby improving the durability of the catalyst case 5. Furthermore, by cooling the catalyst case 5 with the wind generated by running the vehicle, it is possible to suppress the heat radiated from the catalyst case 5 to one end 8C of the fan shroud 8.

[0025] Here, if part of the air flowing from the ventilation section 3A toward the catalyst case 5 is blocked by the heat shield plate 9, it is not possible to send more air to the catalyst case 5 located behind the fan shroud 8, and a sufficient cooling effect cannot be obtained.

[0026] Therefore, the heat shield plate 9 has a cutout portion 9A formed by removing the portion that overlaps the ventilation path of the traveling wind connecting the ventilation portion 3A and the catalyst case 5.

[0027] The catalyst case 5 has an inlet-side exhaust pipe 6 that introduces exhaust gas. The inlet-side exhaust pipe 6 is located at the top of the catalyst case 5 and becomes hot due to the exhaust gas introduced into it. For this reason, it is desirable to efficiently guide the running wind to the inlet-side exhaust pipe 6. Therefore, the cut-out portion 9A is located in front of the inlet-side exhaust pipe 6. In other words, the portion of the heat shield 9 in front of the inlet-side exhaust pipe 6 is removed to form the cut-out portion 9A.

[0028] As described above, in this embodiment, one end 8C of the fan shroud 8 in the vehicle width direction faces the catalyst case 5 in the front-rear direction and is covered by the heat shield plate 9. The front grille 3 has a ventilation section 3A that takes in running air from the front of the vehicle into the engine compartment 10, and is disposed in front of the radiator 7. The ventilation section 3A is disposed outboard of the one end 8C of the fan shroud 8 in the vehicle width direction, and the ventilation section 3A is provided with an inclined wall 3B that deflects the running air toward the catalyst case 5. The heat shield plate 9 has a cutout portion 9A formed by removing a portion that overlaps with the ventilation path of the running air connecting the ventilation section 3A and the catalyst case 5.

[0029] In this way, by eliminating the portion of the heat shield plate 9 that overlaps with the ventilation path, it is possible to prevent the air heading from the ventilation section 3A toward the catalyst case 5 from being blocked by the heat shield plate 9. This allows more air to be sent to the catalyst case 5 located behind the fan shroud 8, improving the cooling effect of the catalyst case 5. As a result, a sufficient cooling effect can be obtained even if there is an obstacle in the ventilation path to the catalyst case 5.

[0030] In this embodiment, the catalyst case 5 has an inlet-side exhaust pipe 6 for introducing exhaust gas, and the cutout portion 9A is disposed in front of the inlet-side exhaust pipe 6.

[0031] This improves the cooling effect of the inlet-side exhaust pipe 6 of the catalyst case 5, which becomes hot due to the passage of high-temperature exhaust gas.

[0032] While an embodiment of the present invention has been disclosed, it will be apparent to one skilled in the art that modifications may be made thereto without departing from the scope of the present invention, and it is intended that all such modifications and equivalents be included in the following claims. [Explanation of symbols]

[0033] 1 vehicle 3 Front grille 3A Ventilation section 3B Slanted wall 4 Engine 5 Catalyst case (exhaust part) 6 Inlet side exhaust pipe 7 Radiator 8 Fan shroud 9 Heat shield 9A Excision part 10 Engine Room

Claims

1. The engine, exhaust parts through which exhaust gas from the engine passes, the radiator, and the fan shroud are housed in an engine compartment at the front of the vehicle, A heat damage prevention structure for a vehicle, the fan shroud being disposed behind the radiator, and the exhaust parts being disposed behind the fan shroud, one end of the fan shroud in the vehicle width direction faces the exhaust component in the front-rear direction and is covered by a heat shield plate, a front grille having a ventilation section for introducing running wind from the front of the vehicle into the engine compartment is disposed in front of the radiator; the ventilation section is disposed outside one end of the fan shroud in a vehicle width direction, The ventilation section is provided with an inclined wall that deflects the traveling wind toward the exhaust component, A heat damage prevention structure for a vehicle, characterized in that the heat shield plate has a cut-out portion formed by removing the portion that overlaps the ventilation path of the air flow connecting the ventilation section and the exhaust part.

2. The exhaust part comprises a catalyst case containing a catalyst, the catalyst case has an inlet-side exhaust pipe for introducing exhaust gas, 2. The heat damage prevention structure for a vehicle according to claim 1, wherein the cutout portion is disposed in front of the inlet side exhaust pipe.

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