JPH0428826Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for discharging hot air from the engine room of an automobile.

[Prior art]

The temperature of the engine compartment of a car rises due to the hot air emitted by the engine. Therefore, when a car is running, a cooling design has been developed that allows air to flow into the engine compartment, ventilates the engine compartment, and exhausts hot air to the outside.

Incidentally, in recent years, there has been a call for higher performance in automobiles, and there has been an increasing demand for higher output from engines. Higher output generally accompanies an increase in the amount of heat dissipated from the engine.

On the other hand, due to demands for higher speeds and lower fuel consumption, there is a trend toward car bodies, especially the front parts, being shaped to reduce air resistance. Currently, forced circulation pressurized water cooling is the mainstream for engine cooling in automobiles, but the radiator opening is becoming narrower due to the above-mentioned trend in the shape of the front section.

Furthermore, there is a risk of heat damage, especially when the engine room is of a closed type in order to shield noise propagated from the engine room as a countermeasure against engine noise.

Under these circumstances, measures have been taken to exhaust hot air from the engine room, such as creating an opening on the side of the bonnet or front fender, and using the speed of the air flowing along the body to draw in and exhaust the hot air from the engine room. ing. However, with this method, cooling air circulation is not good when driving on a slope for a long time at low speed, or because the body structure of a cab-over one-box vehicle is such that the grille opening is far away from the radiator and engine. Depending on the type of vehicle, the heat exhaust effect is not necessarily sufficient.

On the other hand, a method has been proposed in which an exhaust fan using power from a motor or the like is provided in the engine room to force exhaust air, but this method is not common because it increases cost and weight.

[Problems that this invention attempts to solve]

This idea was made in view of the above circumstances.
There is no need to provide an exhaust port on the outside of the body, and there is almost no increase in cost or weight.
It is an object of the present invention to provide a means for efficiently discharging hot air within an engine room, thereby solving the above-mentioned conventional problems.

[Means for solving problems]

In the engine room of a car equipped with a radiator and cooling fan, an exhaust duct is provided in the room, one opening of the duct is located at the rear upper part of the room, and the other opening is located at the front inside the wheel house. Position it so that it faces the inner surface of the front disc wheel. In addition, a disc wheel equipped with fin-like spokes is used as the disc wheel. This type of disc wheel is already in use in order to improve the dissipation of frictional heat of the disc brake, and the present invention can use the disc wheel currently in use.

[Effect]

The upper part of the engine room has poor ventilation and tends to accumulate hot air. Therefore, by locating one opening of the duct in the area where hot air tends to accumulate and the other opening facing the disc wheel, when the vehicle is running, the disc wheel acting as a fan forces the hot air in the engine room through the duct. is sucked out.

〔Example〕

FIGS. 1 and 2 show an embodiment in which the present invention is applied to a cab-over vehicle.

A radiator grill 1 is provided at the front of the vehicle body. An engine room 2 is formed in the lower part of the cabin behind the radiator grill 1, and an engine 3 is mounted in the center of the engine room 2. radiator grill 1
A radiator main body 4 is installed at the rear of the radiator main body 4, that is, in front of the engine 3, and a cooling fan 5 that is rotationally driven by the engine 3 is provided in close opposition to the rear surface of the radiator main body 4.

A pair of ducts 6 made of heat-resistant material are installed on both the left and right sides of the engine room 2. Duct 6
The opening at one end is located at the rear upper part of the engine room 2, and the other end extends forward along the wheel house inner plate 7 forming the left and right side walls of the engine room 2, and the end is bent outward. It passes through the wheel house inner plate 7 and opens at the front of the wheel house 8. The duct 6 is held and fixed by a clamp (not shown) provided on the inner plate 7 of the wheel house, the dart board, or the like. Furthermore, duct 6
The duct 6 may be formed into a half-cylindrical shape with a semicircular cross section and welded to the wheel house inner plate 7 to form a hot air exhaust passage between the duct 6 and the wheel house inner plate 7. In this case, the duct 6 is connected to the wheel house. House inner board 7
Also serves as a reinforcing member.

9 is the front wheel of the vehicle, with fin-like spokes 10
The other end of the duct 6 is opened to face the inner surface of the disc wheel 7.

In the above configuration, when the car is running, the running air that enters the interior through the radiator grille 1 is sucked by the cooling fan 5, flows into the engine room 2 through the radiator body 4, and flows out through the gap in the room 2. .

On the other hand, the temperature inside the engine room 2 rises due to the heat emitted from the engine 3;
The hot air inside cannot be completely exhausted only through the above gap,
In particular, hot air tends to accumulate in the rear upper part of the engine room 2, resulting in high temperatures. However, the hot air from the lever is absorbed by the rotating disc wheel 11 with fin-like spokes.
The suction force causes the liquid to be forcibly discharged through the duct 6.

Therefore, it is possible to always introduce a sufficient amount of fresh running air into the engine room 2, thereby preventing overheating. At the same time, the radiator body 4
Since the cooling efficiency of the radiator body 4 is also improved, it is possible to reduce the size, weight, and cost of the radiator main body 4.
Furthermore, since the radiator grille 1 can be made smaller, it contributes to improving the aerodynamic performance of the front part of the vehicle body and increasing the degree of freedom in design.

In order to prevent muddy water, etc. splashed up by the tires and entering the duct 6, from flowing back into the engine room 2, the rear end opening of the duct 6 in the engine room 2 is located above the front end opening, as in the illustrated embodiment. This can be prevented.

In addition, if there is a risk that the engine 3 may overcool in a cold region due to improved air circulation in the engine room 2, the blades act as a radiator at a predetermined temperature to close the radiator grill. It is desirable to have a radiator with a water temperature sensing movable plate.

[Effects of the invention] As described above, according to the invention, the hot air from the rear upper part of the engine room is sucked and discharged outside through the duct by the rotation of the disc wheel of the front wheel, which acts as a fan. Efficiently removes hot air inside.

[Brief explanation of the drawing]

The figure shows an example in which the hot air exhaust structure of the present invention is applied to a cab-over vehicle.
FIG. 2 is a side view. 1...Radiator grill, 2...Engine room, 3...Engine, 4...Radiator body, 5
...cooling fan, 6 ... duct, 8 ... wheel house, 10 ... fin-shaped spoke, 11 ... disc wheel.

Claims (1)

[Scope of utility model registration request] A duct is provided in the engine room of an automobile equipped with a radiator and a cooling fan, and one opening is located at the rear upper part of the room, and the other opening is located at the front part of the wheel house. A hot air exhaust structure for an engine room characterized by having an opening facing the inner surface of a disc wheel of a front wheel equipped with fin-like spokes.