JPH0313530Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cooling device for an automobile engine.

[Conventional technology]

Normally, in an automobile engine, a radiator and a cooling fan are installed in the front part of the engine room, and the cooling water that becomes hot in the engine is cooled by the radiator, and then returned to the engine to cool the engine. It is being done. However, although the engine is cooled by cooling water, the engine itself is hot, and the heat from the engine causes the temperature in the engine room to rise.
As a result of this, for example, the float chamber of the carburetor in a carburetor engine, or the delivery pipe of the fuel injection valve in a fuel injection engine, becomes hot and the fuel evaporates, causing percolation in the fuel system. There is also the problem that auxiliary equipment in the engine room is subject to heat damage.

Therefore, in conventional automobile engines, as shown in Japanese Utility Model Application Publication No. 59-103822, for example, a baffle plate is provided on the rear side of the radiator, and the inside of the engine room is cooled by the air passing through the radiator. There is something like this.

[Problem that the invention attempts to solve]

However, in the device described in the above-mentioned conventional publication, the air passing through the radiator has a relatively high temperature and is hot air, so it is not possible to sufficiently suppress the temperature rise in the engine room, and the fuel system is still affected. The problem of heat damage to collations and auxiliary equipment remains.

In view of this problem, this invention aims to provide a cooling device for an automobile engine that can reliably suppress the temperature rise in the engine room.

To solve the above problems, increase the capacity of the radiator or increase the size of the cooling fan, reduce the heat exchange rate per unit air volume in the radiator, and lower the temperature of the air passing through the radiator. It is conceivable that this method could be used to cool the inside of the engine compartment, but this method requires placing a large radiator or cooling fan in the engine compartment, which has a small layout space, which is undesirable in terms of bonnet space. The use of radiators and cooling fans raises the problem of increased costs.

[Means for solving problems]

Therefore, the cooling device for an automobile engine according to this invention is provided with a bypass cooling air passage included in the rotation locus of the cooling fan on the upper part of the fan shroud that protrudes from the upper edge of the radiator, in the rotation locus of the cooling fan on the upper part of the fan shroud, The front end of the passage is opened at a position in front of the protrusion of the cooling fan, and the rear end is opened at a position opposite to the protrusion of the cooling fan.

[Effect]

In this design, when the cooling fan rotates, outside air flows into the engine compartment through a bypass cooling air passage provided at the top of the radiator, thereby heating the upper space of the engine compartment by the radiator. This means that the air that is not being used is circulated, and the temperature rise in the engine room is suppressed.

〔Example〕

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

1 and 2 show a cooling device for an automobile engine according to an embodiment of the present invention. In the figure,
Reference numeral 1 denotes an engine room provided in the front part of the vehicle body. The upper part of the engine room 1 is covered with a bonnet 2, and an engine 6 is disposed in the engine room 1. A radiator 4 and a cooling fan 5 are disposed therein, and the cooling fan 5 is disposed so as to have a protruding portion 5a that protrudes above the upper edge of the radiator 4. Further, a fan shroud 9 is fixed to the radiator 4. In the figure, 3 is a bumper provided at the front end of the vehicle body.

An air intake 7, which is a bypass cooling ventilation passage that bypasses the radiator 4, is provided so as to be included in the rotation locus 8 of the cooling fan 5 at the upper part of the fan shroud 9, and the front end 7a of the air intake 7 is The above cooling fan 5
It opens at the front position of the protrusion 5a, and the rear end 7b
is opened at a position facing the protrusion 5a of the cooling fan 5.

Next, the effects will be explained.

When the engine operates, the cooling fan 5 is rotated by the engine 6, whereby outside air A is forcibly introduced into the radiator 4 along with the running wind, and the cooling water that has become high temperature in the engine 6 is cooled in the radiator 4. becomes.

At that time, in this embodiment, the outside air B is forcibly introduced into the upper space of the engine room 1 by the cooling fan 5 together with the running wind, and is introduced into the upper space of the engine room 1.
This will suppress the temperature rise inside.

In this embodiment, the outside air is forcibly passed through the air intake by the cooling fan and introduced into the engine room, so the temperature rise in the engine room can be suppressed, and as a result, fuel failure and auxiliary equipment problems can be prevented. This is particularly effective when the vehicle is stopped.

Furthermore, since this device does not require a large radiator or cooling fan, it is advantageous in terms of bonnet space, and furthermore, cost increases can be suppressed.

[Effect of idea]

As described above, according to the automotive engine cooling device according to the present invention, the bypass cooling ventilation passage is provided so as to be included in the cooling fan rotation locus at the upper part of the fan shroud that protrudes from the upper edge of the radiator, and the front end thereof is The opening is in front of the protruding part of the fan, and the rear end is opened in a position opposite to the protruding part of the cooling fan, so outside air can be introduced into the engine room at a low temperature, suppressing the temperature rise in the engine room. This has the effect of preventing the occurrence of fuel failures, etc.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a cooling device for an automobile engine according to an embodiment of the present invention, and FIG. 2 is a front view of essential parts of the device. 1...Engine room, 4...Radiator, 5
. . . Cooling fan, 5a . . . Projection, 7 .

Claims (1)

[Scope of Claim for Utility Model Registration] In an automobile engine having a radiator disposed at the front of the engine room and a cooling fan disposed behind the radiator so as to protrude above the upper edge of the radiator, bypass cooling ventilation is provided. A passage is provided so as to be included in the rotation locus of the cooling fan at the upper part of the fan shroud, the front end of the ventilation passage is opened at a position in front of the protrusion of the cooling fan, and the rear end is opened at a position opposite to the protrusion of the cooling fan. An automobile engine cooling device characterized by: