JP2581443Y2 - Oil cooler - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil cooler attached to a vehicle engine or the like.

[0002]

2. Description of the Related Art A conventional oil cooler for cooling oil for engine lubrication of a vehicle or oil for an automatic transmission is, in the case of an air-cooling type installed in front of a radiator, a decrease in the wind speed of the radiator and an increase in the unevenness of the wind speed. Disadvantages such as an increase in the inflow air temperature, a long oil pipe to the front of the radiator, and, in the case of a water-cooled type installed in the radiator lower tank or near the oil filter, an increase in the amount of cooling water received by cooling the oil, It has drawbacks such as an increase in the flow resistance of the cooling water and a limitation on the cooling performance due to a small temperature difference between the oil and the cooling water. Was inevitable.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve the cooling performance of an oil cooler cooled by an engine coolant.

[0004]

SUMMARY OF THE INVENTION Accordingly, an oil cooler according to the present invention includes an engine coolant reservoir provided below an engine coolant passage for supplying engine coolant from an engine to a radiator. installed in reservoir and the engine cooling liquid that passes communication between passage path and the engine coolant in the reservoir has a heat exchange element in which the oil is introduced, the engine coolant by the oil circulating in the heat exchange element The steam generated by boiling and evaporating the engine coolant remaining in the pool
Goes up through the flow path from inside the engine coolant reservoir
The engine flows into the engine coolant passage and the engine
The engine coolant flows from the coolant passage through
It is configured to be replenished into the engine coolant reservoir .

[0005]

In other words, since the engine coolant reservoir communicates with the engine coolant passage through the flow path, the engine coolant remains in the engine coolant reservoir, and is thus guided into the heat exchange element. The high-temperature oil allows the engine coolant in the engine coolant pool to easily boil and evaporate, thereby cooling the oil well, and the steam generated in the engine coolant pool passes through the flow passage and passes through the engine coolant above. The engine coolant flows into the passage, mixes and condenses with the engine coolant in the passage, and the engine coolant is replenished into the engine coolant reservoir through the passage from the engine coolant passage.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention shown in the drawings are specifically described below. In FIGS. 1 and 2, unsaturated engine cooling water is supplied from a mounted engine (not shown) through a passage 2 to a radiator 1 attached to a front portion of the vehicle, and cooling water cooled by the radiator 1 is returned to a return passage. 3
Is returned to the engine, but a box 4 is provided in the middle of the passage 2.

The box 4 is divided into an upper chamber 6 and a lower chamber 7 by a partition plate 5, and both chambers 6, 7 are communicated by a number of small holes 8 formed in the partition plate 5. The passage 2 is opened to allow cooling water to flow, while the lower chamber 7
The lower chamber 7 forms a pool of cooling water when the cooling water flows through the small hole 8 and stays there.

Heat exchange elements 10 and 11 are installed in the cooling water reservoir 7, and high-temperature oil lubricating the engine is guided to the heat exchange element 10, and high-temperature oil flowing out of the automatic transmission is supplied to the heat exchange element 11. Oil is led and these oils are cooled by the cooling water in the cooling water pool 7.

At this time, since the cooling water stays in the cooling water pool 7, the cooling water in contact with the heat exchange elements 10 and 11 easily rises in temperature by receiving heat from the high-temperature oil and boils and evaporates. The water vapor generated in the pipe 7 rises, passes through the small holes 8, mixes with the unsaturated cooling water flowing through the passage 2, rapidly condenses, returns to the cooling water, and enters the cooling water reservoir 7 from the passage 2. Unsaturated cooling water is replenished through the small holes 8. That is, the heat exchange elements 10 and 11
When the temperature difference between the oil and the cooling water is small, the cooling of the oil is performed by the boiling heat transfer of the cooling water, so the heat transfer coefficient is very large and the cooling performance of the oil by the cooling water is remarkably improved. However, the oil can be effectively cooled.

When the temperature of the oil is relatively low, such as when starting the engine, the temperature of the oil in the heat exchange element 10 can be raised relatively quickly by the cooling water in the cooling water reservoir 7, so that the engine can be cooled. Lubricity is improved, friction loss of each part is reduced, and fuel efficiency of the engine can be easily improved.

Next, the embodiment shown in FIG. 3 will be described by assigning the same reference numerals to parts equivalent to those in the above embodiment. In this case, a cooling water sump 20 is provided below the passage 2 through which the unsaturated engine cooling water flows, and the passage 2 and the cooling water sump 20 are communicated with each other by a thin flow path 21. Heat exchange elements 10 and 11 are installed, and high-temperature oil lubricating the engine is guided to the heat exchange element 10, while high-temperature oil flowing out of the auto transmission is guided to the heat exchange element 11, and these oils are accumulated in the cooling water pool. The cooling water is cooled by the cooling water staying in 20, and the cooling water is boiled and evaporated.
The generated steam rises, passes through the flow path 21 and mixes with the unsaturated cooling water flowing through the passage 2 to rapidly condense and return to the cooling water. The effect can be achieved.

[0012]

In the oil cooler according to the present invention, the high-temperature oil guided into the heat exchange element is cooled by the engine coolant remaining in the engine coolant reservoir, and the engine coolant is easily boiled. Since the oil can be evaporated, the cooling power of the oil by the engine coolant is extremely large, and the oil can be effectively cooled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part in an embodiment of the present invention.

FIG. 2 is an overall perspective view of the embodiment.

FIG. 3 is a schematic vertical sectional view of a main part in another embodiment of the present invention.

[Description of Signs] 1 radiator 2 cooling water passage 4 box 5 partition plate 6 upper chamber 7 cooling water pool 8 small hole 10 heat exchange element 11 heat exchange element 20 cooling water pool 21 flow path

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuji Ukita 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Automotive Industries, Ltd. (56) References Japanese Utility Model Showa 61-114021 (JP, U) (58 ) Surveyed field (Int.Cl. ⁶ , DB name) F01M 5/00 F01P 11/08

Claims (1)

(57) [Scope of request for utility model registration] 1. A radiator in the collecting engine coolant to feed Kyusuru engine coolant engine coolant provided below the passage from the engine, that passage and through communication between the engine coolant reservoir and the engine coolant passage A heat exchange element that is installed in the engine coolant reservoir and guides oil, and the engine coolant that remains in the engine coolant reservoir is boiled and evaporated by oil flowing through the heat exchange element, The generated steam is on
From inside the engine coolant reservoir through the above flow path,
Out of the engine coolant passage and the engine cooling
The engine coolant flows from the fluid passage through
An oil cooler configured to be refilled into the gin coolant reservoir .