JP2581278Y2 - Internal combustion engine cooling system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for an internal combustion engine, which comprises a water pipe type air-cooled radiator for cooling water and a water pipe type air-cooled radiator for cooling an aftercooler for cooling the intake air. The present invention relates to a cooling device for an internal combustion engine provided with the cooling device.

[0002]

2. Description of the Related Art Generally, the temperature of cooling water flowing through a radiator for cooling water of an internal combustion engine is about 100 ° C. or less, and the temperature of cooling water flowing through an aftercooler for cooling intake air is about 50 ° C. or less. .

[0003] Therefore, when using a water tube cooler, because there is a difference in deformation due to both thermal expansion, conventional, in the cooling apparatus for an internal combustion engine having a radiator, a aftercooler for radiator is shown in Figure 4 as such, either arranged in series with each independent radiator 30 and the aftercooler for radiator 31 to the flow of air indicated by the arrow, Fig. 5
As shown in the figure, a radiator 33 and an aftercooler radiator 32 are arranged in parallel.

[0004]

However, according to the above configuration, since the radiator and the aftercooler radiator are provided independently of each other, a large space is required, the structure becomes complicated, and the cost is reduced. Is also disadvantageous.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides an economical cooling system for an internal combustion engine which has a function of a radiator and a radiator for an aftercooler, has a simple structure, and has a small field. It is an object.

[0006]

In order to achieve the above object, a cooling device for an internal combustion engine according to the present invention is provided with a water pipe type air cooling cooler for cooling cooling water and intake air of the internal combustion engine. Wherein the cooling water cooler and the cooling water cooler for the air cooler are integrally formed with an upper tank and a lower tank, and the cooler for the air cooler includes a water pipe provided with a curved portion in a part thereof. I have.

[0007]

According to the above construction, the cooling water cooler, the upper tank and the lower tank of the cooling water cooler for the intake cooling device are integrally formed, and a part of the water pipe of the cooling device for the intake cooling device is curved. Even if there is a temperature difference between the water and the cooling water of the intake air cooler, the difference in deformation due to thermal expansion can be absorbed by the curved portion of the water pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cooling device for an internal combustion engine according to the present invention will be described below with reference to the drawings. FIG. 1 shows a cooling circuit of an internal combustion engine including the cooling device according to the present invention, which includes an internal combustion engine 101, a fan 102, and a turbocharger 10.
3, aftercooler 104, and water pump 10
5, 106, a radiator 10 for aftercooler, and a radiator 20. The engine cooling water circuit 110 circulates cooling water through the internal combustion engine 101 → the radiator 20 → the water pump 105 → the internal combustion engine 101. The aftercooler cooling water circuit 120 supplies the cooling water to the aftercooler radiator 10 → water pump 106 →
Aftercooler 104 → radiator 1 for aftercooler
Circulating at 0. FIG. 2 is a side view of the cooling device,
An aftercooler radiator 10 as an intake cooler and a radiator 20 as a cooling water cooler are arranged in series with respect to the flow of air indicated by the arrow.

The upper tank 1 is formed integrally with the aftercooler radiator portion 2 and the radiator portion 3, and the lower tank 4 is also formed integrally with the aftercooler radiator portion 5 and the radiator portion 6. The amper tank 1 and the lower tank 4 are connected by a water pipe of a radiator 10 and a radiator 20 for aftercooler.

FIG. 3 is a detailed sectional view of a portion A in FIG. 2 and shows a water pipe 11 and a radiator 2 of an aftercooler radiator 10.
The zero water pipe 21 is connected to the aftercooler radiator portion 5 and the radiator portion 6 of the lower tank 4, respectively. Fins 12 are mounted on the water tubes 11 and 21.

Water tube 11 of aftercooler radiator 10
Has a curved portion 13 in a part as shown in FIG.
The fin 12 at that portion has been removed.

Next, the operation will be described. When the engine starts running and cooling water starts flowing into the cooler, as described above,
The temperature of the cooling water flowing into the water pipe 21 of the radiator 20 becomes a maximum of about 100 ° C., and the temperature of the cooling water flowing into the water pipe 11 of the radiator 10 for aftercooler becomes a maximum of about 50 ° C.

Accordingly, the water pipe 21 of the radiator has a larger expansion due to thermal expansion than the water pipe 11 of the aftercooler radiator, but the difference in expansion deformation is absorbed by the curved portion 13 of the water pipe 11, and the junction between the upper tank 1 and the lower tank 4 is formed. No excessive force will be applied to it.

[0014]

As described above, the present invention relates to a cooling device for an internal combustion engine having a water pipe type air-cooled radiator and an aftercooler, wherein an upper tank and a lower tank are integrally formed, and a curved portion is formed in a part of a water pipe of the aftercooler radiator. Because of the provision, even if a temperature difference occurs in the cooling water, the difference in thermal expansion is absorbed by the curved portion, and no excessive force is applied to the joint, so the durability is high, the structure is simple, the field is small, and economical A cooling device for an internal combustion engine is obtained.

[Brief description of the drawings]

FIG. 1 is a cooling circuit diagram of an internal combustion engine including the cooling device of the present invention.

FIG. 2 is a side view of the cooling device of the present invention.

FIG. 3 is a partial detailed view of the cooling device of the present invention.

FIG. 4 is a side view of a first example of a conventional cooling device.

FIG. 5 is a front view of a second example of the conventional cooling device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 upper tank 2, 5 radiator part for aftercooler 4 lower tank 3, 6 radiator part 10 radiator for aftercooler 11, 21 water pipe 12 fin 13 curved part

Claims (1)

(57) [Scope of request for utility model registration] 1. A cooling device comprising a water pipe type air cooling cooler for cooling cooling water and intake air of an internal combustion engine, comprising: an upper tank in which a cooling water cooler and a cooling water cooler for an air cooler are integrally formed; A cooling device for an internal combustion engine, comprising: a lower tank; and the water cooler includes a water pipe provided with a curved portion in a part thereof.