JPH0113769Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooling device for a lubrication system of an internal combustion engine.

[Conventional technology]

In order to maintain the lubricating performance of the lubricating oil, it is necessary to cool the lubricating oil, and an oil cooler is usually provided in the middle of the oil passage. On the other hand, in order to provide substantial cooling capacity to the oil pan that stores a relatively large amount of lubricating oil, some oil pans have fins provided on the bottom surface of the oil pan. However, in cases where the lubricating oil tends to reach higher temperatures, such as in an internal combustion engine with a turbo charger, simply adding fins to the oil pan as described above is not sufficient, and it is necessary to make the oil cooler larger. It becomes necessary to take measures. Japanese Utility Model Application Publication No. 55-177009 discloses a configuration in which a pipe for passing lubricating oil is provided on the bottom surface of the oil pan in addition to fins, which enables cooling of the oil pan. .

[The problem that the idea aims to solve]

However, according to the configuration described in the above publication,
Since a pipe and fins for improving the cooling effect of the pipe are provided on the lower surface of the oil pan, a problem arises in that the height of the oil pan increases. On the other hand, there has been conventionally known an oil pan consisting of a relatively deep oil sump and a relatively shallow dish formed around the opening edge of the oil sump. There is a problem in that the strength performance is low at the corner formed at the boundary between the lower surface of the pan and the side surface of the oil reservoir, and the overall rigidity is insufficient.

The present invention can sufficiently cool the lubrication system, reduce the height of the entire oil pan, and reinforce the corner between the pan and the oil sump.
This was done for the purpose of obtaining a cooling device with a simple configuration.

[Means to solve the problem]

The cooling device according to the present invention includes an oil pan consisting of a relatively deep oil sump and a relatively shallow pan formed around the opening edge of the oil sump, and a relatively shallow pan formed on the lower surface of the pan. , a first branch pipe extending along the longitudinal direction of the oil pan through which lubricating oil flows; and a first branch pipe extending in the width direction of the oil pan provided at a corner formed at a boundary between the lower surface of the dish and the side surface of the oil sump part. Extending along the
A second branch pipe through which lubricating oil flows, cooling fins formed on the outer surface of the oil reservoir and the outer surface of the second branch pipe, and oil that pumps the lubricating oil in the oil pan to the lubricated part. The lubricating oil discharged from the oil pump is supplied to the lubricated portion through at least one of the first and second branch pipes.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 shows a lubrication system of an internal combustion engine to which the device of this embodiment is applied. In this figure, an oil strainer 2 is provided upstream of an oil pump 1, and an oil filter 3 is provided downstream. A thermovalve 6 is provided downstream of the oil filter 3 to switch the flow path of lubricating oil between the first and second passages 4 and 5. An oil cooler 7 is disposed in the middle of the first passage 4, and the first passage 4 is connected to a first port 9 of a lubricating oil conduit 8 formed on the lower surface of the oil pan, which will be described later. On the other hand, the second passage 5 is connected to the second port 10 of the conduit 8, and a third passage is branched in the middle to lead to a valve train (not shown).
It is called Aisle 11. The conduit 8 has a substantially T-shape, and has a third port 12 on the opposite side of the second port 10.
A fourth passage 14 communicating with a bearing portion of a turbocharger 13 is connected to the third port 12 .

The thermovalve 6 allows the lubricating oil sent through the oil filter 3 to flow into the first passage 4 along arrows A and B when the temperature of the lubricating oil is relatively high. After this lubricating oil is cooled by the oil cooler 7, it flows into the first port 9 of the conduit 8 along the arrow C, and after branching within the conduit 8, it flows into the second and second ports along the arrows D and E. It is discharged from three ports 10 and 12, respectively. The lubricating oil coming out of the second port 10 flows along the arrow F, and flows through the second passage 5 and the third passage 1.
Lubricating oil is supplied to the valve train etc. through the fourth passage 14, and the lubricating oil exited from the third port 12 is supplied to the turbocharger 13 through the fourth passage 14. These lubricating oils flow back to the oil pan described later.

On the contrary, when the lubricating oil temperature is relatively low,
The lubricating oil that has passed through the oil filter 3 is sent to the second passage 5 and the third passage 11 by the thermovalve 6. The lubricating oil sent to the second passage 5 flows along the arrow G, enters the conduit 8 from the second port 10, exits from the third port 12 as shown by the arrow H, passes through the fourth passage 14, and enters the turbocharger. 13. Note that since the first passage 4 is closed by the thermovalve 6, the lubricating oil in the pipe line 8 does not flow to the first port 9 side. On the other hand, the third passage 11
The lubricating oil sent to the valve train is directly supplied to the valve train, etc. In this way, when the temperature of the lubricating oil is low, the lubricating oil is supplied to each lubricating part without passing through the oil cooler 7.

2 and 3 show the oil pan 20. FIG.
This oil pan 20 is an aluminum casting product, and its main body consists of a deep oil reservoir portion 21 and a shallow dish portion 22 formed around the opening edge of the oil pan 20.
The lubricating oil conduit 8 is integrally formed on the lower surface of the oil pan 20. That is, the first branch pipe 23 of the pipe line 8 having the first port 9 is formed below the dish portion 22 so as to face the longitudinal direction of the oil pan 20, and the first branch pipe 23 having the second and third ports 10, 12 is formed below the dish portion 22 so as to face the longitudinal direction of the oil pan 20. The two-branch pipe 24 faces in the width direction of the oil pan 20 and is formed at a corner at the boundary between the oil reservoir section 21 and the dish section 22. Cooling fins 25 are formed on the lower surface of the oil pan 20 and on the outer surfaces of the oil reservoir 21 and the second branch pipe 24 . A large number of fins 25 are arranged parallel to the longitudinal direction of the oil pan 20, but are not formed around the dish portion 22 and the first branch pipe 23.

Thus, the first branch pipe 23 is placed on the lower surface of the dish portion 22,
The second branch pipe 2 is provided along the longitudinal direction.
4 is provided at the corner between the dish portion 22 and the oil reservoir portion 21. When the temperature of the lubricating oil is high, the lubricating oil follows the flow path determined by the thermovalve 6, is cooled by the oil cooler 7, and then flows through the first branch pipe 23 and the second branch pipe 24 to the turbocharger or Supplied to the valve train. Therefore, the lubricating oil cooled by the oil cooler 7 to a relatively low temperature cools the oil pan 20. That is, when the temperature of the lubricating oil is high, the first and second
The branch pipes 23 and 24 effectively cool the oil pan 20. On the other hand, when the temperature of the lubricating oil is relatively low, the lubricating oil does not need to be cooled by the oil cooler 7, so it flows only through the second branch pipe 24 by the action of the thermovalve 6, and the oil pan 20 is cooled during this time. do. Furthermore, since the second branch pipe 24 is provided at the corner between the dish 23 and the oil reservoir 21, the rigidity of this corner can be increased.

Furthermore, according to this embodiment, the cooling fins 25 are formed on the outside of the oil reservoir 21 and the second branch pipe 24, so that the cooling effect of the oil pan 20 and the pipe line 8 is increased. Furthermore, the first and second branch pipes 23,
24 is formed on the lower surface of the dish portion 22 instead of the lower surface of the oil reservoir portion 21, the height of the cooling fins 25 provided on the lower surface of the oil reservoir portion 21 is higher than that of the second branch pipe 2.
It may be smaller than the diameter of 4. Therefore, the second
The height of the oil pan can be reduced compared to when it is provided on the lower surface of the oil reservoir 21 of the branch pipe 24.

[Effect of idea]

As described above, according to the present invention, it is possible to obtain the effect that the lubrication system can be efficiently cooled with a simple configuration. In addition, since the first and second branch pipes are formed on the bottom surface of the pan instead of the bottom surface of the oil sump, the height of the cooling fins on the bottom surface of the oil sump is smaller than the diameter of the second branch pipe. Therefore, the height of the entire oil pan can be reduced compared to the case where the second branch pipe is provided on the lower surface of the oil sump. Furthermore, since the first branch pipe is not close to the oil sump where a large amount of lubricating oil is stored, there is no need for cooling fins on the outer surface of the first branch pipe.In other words, the configuration of the device of the present invention is simple. has been made into Furthermore, since the second branch pipe is provided at the corner between the pan and the oil reservoir, this corner is reinforced and the strength performance of the oil pan is improved.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing a lubrication system to which an embodiment of the present invention is applied, FIG. 2 is a side view showing an oil pan and a lubricating oil conduit, and FIG. 3 is a bottom view of FIG. 2. 8...Lubricating oil pipe line, 20...Oil pan, 2
4...Second branch pipe, 25...Cooling fin.

Claims (1)

[Scope of utility model registration request] A device that cools a lubrication system that supplies lubricating oil to lubricated parts such as bearings of an internal combustion engine. A first branch pipe formed on the lower surface of the pan and extending along the longitudinal direction of the oil pan, through which lubricating oil flows, and a boundary between the lower surface of the pan and the side surface of the oil reservoir. a second branch pipe provided at a corner formed in the oil pan and extending along the width direction of the oil pan through which lubricating oil flows; a cooling fin, and an oil pump that pumps the lubricating oil in the oil pan to the lubricated part, and the lubricating oil discharged from the oil pump passes through at least one of the first and second branch pipes. A cooling device for a lubrication system of an internal combustion engine, characterized in that the cooling device is supplied to the lubricated parts.