JPH063133Y2 - Lubricating oil tank mounting structure for semi-dry sump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a structure for mounting a lubricating oil tank of a semi-dry sump type internal combustion engine having a lubricating oil tank separately from an oil pan.

(Prior Art and its Problems) Conventionally, in a semi-dry sump type internal combustion engine, a lubricating oil tank is provided separately from an oil pan. On the other hand, a cylinder block of a marine engine has an inspection window opened for piston replacement, and conventionally, the inspection window is covered with a dedicated side cover.

However, with a thin side cover, engine noise easily leaks from the side cover to the outside, and the noise is large.

Further, it is necessary to provide a work space for attaching and detaching the side cover, and there is room for improvement in terms of space utilization efficiency around the narrow engine.

As a prior art related to this case, there is Japanese Patent Application No. 61-47857.

(Purpose of Invention) The present invention was made in consideration of the above circumstances.
An object of the present invention is to provide a mounting structure of a lubricating oil tank for a semi-dry sump type internal combustion engine, which can also serve as a side lid for an inspection window.

(Structure of the Invention) (1) Technical Means In the present invention, an oil pan is provided at the lower end of a cylinder block of an internal combustion engine, and an oil pump is provided inside the oil pan.
In an internal combustion engine that has a lubricating oil tank separately from the oil pan and has an inspection window opened on the side surface of the cylinder block, a side lid portion that covers the inspection window is formed integrally with the lubricating oil tank to form a lubricating oil tank. This is a mounting structure for a lubricating oil tank for a semi-dry sump, which is detachably provided on a cylinder block and is covered with an inspection window with a lubricating oil tank.

(2) Action The side cover of the lubricating oil tank covers the inspection window of the cylinder block, eliminating the need for a side cover.

The space directly below the fuel injection pump is used as a lubricating oil tank to improve space utilization efficiency.

The lubricating oil in the lubricating oil tank attenuates the noise leaking from the inspection window, and the engine becomes quiet.

(Example) In FIG. 1 showing a marine diesel engine adopting the present invention, 10 is a cylinder block, 11 is a cylinder head,
12 is an oil pan. A fuel injection pump 13 is provided on the right side surface of the cylinder block 10, and the fuel injection pump 1
A lubricating oil tank 14, which is the gist of the present invention, is provided directly below 3. An exhaust turbocharger 15 is connected to the cylinder head 11, and an oil pump 16 is built in the oil pan 12.

In FIG. 2 showing the lubricating system of the engine of FIG. 1, the lubricating oil 17 in the oil pan 12 is pressure-fed to the engine lubrication necessary portion 18 by the oil pump 16 to lubricate the exhaust turbocharger 15 and then the lubricating oil. Once stored in the tank 14, the oil pan 12
Return to. When the exhaust turbocharger 18 is not provided, the passage 19 is connected.

With the lubricating oil tank 14 removed, in FIG. 3 which is a view taken in the direction of arrow III in FIG. 1, one inspection window 20 is opened on each side of the cylinder block 10 for each cylinder.
A mounting surface 21 is formed around 0. Screw holes 22 are formed at a plurality of locations on the mounting surface 21. This mounting surface 2
1, the side cover portion 23 of the lubricating oil tank 14 (FIG. 1) is closely attached, and a bolt 24 (FIG. 1) is screwed into the screw hole 22 to attach the lubricating oil tank 14 to the cylinder block 10.

A lubricating oil tank 14 shown in FIG. 4 is provided with a horizontally elongated container-shaped main body 30, which is provided with a refueling port 31, a dipstick pipe 32, a pipe connecting portion 33, a baffle 34 and the like. As shown in FIG. 5, the refueling port 31 communicates with the inside of the main body 30, and a plate-shaped side lid portion 23 is welded to the back surface of the main body 30. This side cover 2
3 closely contacts the mounting surface 21 (FIG. 3) of the cylinder block 10 to close the inspection window 20 (FIG. 3).

As shown in FIG. 6, the upper end of the dipstick pipe 32 is the main body 3
0 protrudes from the upper surface, penetrates the inside of the main body 30 and protrudes from the lower surface as shown in FIG. The pipe connecting portion 33 is also connected to the inside of the main body 30, and a pipe 36 (FIG. 2) for returning the lubricating oil to the lubricating oil tank 14 is connected.
A penetrating pipe 40 (Fig. 4) extending in the lateral direction of Fig. 7 penetrates through the main body 30 and the side lid portion 23, and a bolt 24 (Fig. 1) is passed through the penetrating pipe 40 to connect the lubricating oil tank 14 to the cylinder. The structure is fixed to the block 10.

As shown in the upper left portion of FIG. 4, a discharge port 41 for discharging the lubricating oil tank 14 in the lubricating oil tank 14 to the oil pan 12 is opened in the side lid portion 23. This outlet 4
No. 1 is covered with the baffle 34, and the baffle 34 prevents the lubricating oil 17 flowing into the lubricating oil tank 14 from flowing out from the discharge port 41 in a short time, and the lubricating oil 17 does not become insufficiently cooled. It has a function. The baffle 34 connects the upper opening of the pipe 42 (Fig. 9) to the upper lid 43 (Fig. 8).
(Fig.), And an air vent hole 44 is formed in the upper lid 43. The discharge port 41 of the side lid 23 is the cylinder block 10
To the passage 45 (Fig. 3).

Next, the operation will be described. In the above embodiment, the lubricating oil 17 after lubricating the exhaust turbocharger 15 (Fig. 1) flows into the lubricating oil tank 14 from the pipe connection portion 33 in Fig. 4. The baffle 34 prevents the lubricating oil 17 in the lubricating oil tank 14 from directly flowing out of the outlet 41, and is stored in the lubricating oil tank 14 for a certain period of time. Passage 45 (Fig. 3)
To return to the oil pan 12. Therefore, the lubricating oil 17 is stored in the lubricating oil tank 14 near the upper limit.

The side cover 23 of the lubricating oil tank 14 is attached to the mounting surface 21 (Fig. 4).
In close contact with the inspection window 20, the inspection window 20 is closed, and the lubricating oil tank 14 also functions as a lid member for the inspection window 20. Therefore, it is not necessary to separately provide a side lid that closes the inspection window 20. The lubricating oil 17 is stored in the lubricating oil tank 14 as described above, and the engine noise transmitted to the side lid portion 23 is attenuated by the lubricating oil 17, so that the engine noise leaking to the outside is reduced. .

As shown in FIG. 1, the lubricating oil tank 14 is arranged, for example, in a space immediately below the fuel injection pump 13, and a space which cannot be used as a work space for attaching and detaching a side cover which covers the inspection window 20 in the past is used. It is used in the lubricating oil tank 14. Lubricating oil tank 14 to cylinder block 1
When removing from 0, it is only necessary to pull out the bolt 24 penetrating the lubricating oil tank 14, and the work is easy.

Since the dipstick rod 32 is provided, the dipstick penetrating the dipstick pipe 32 can be provided so that the dipstick can be guided by the dipstick pipe 32 during the dipstick test.

(Effects of the Invention) As described above, in the mounting structure of the lubricating oil tank for the semi-dry sump according to the present invention, since the side lid portion 23 is provided integrally with the lubricating oil tank 14, the side block portion of the lubricating oil tank is used for the cylinder block. Covers the inspection window of and eliminates the need for a side cover.

Since the lubricating oil tank 14 is disposed, for example, in a dead space directly below the fuel injection pump 13 that could not be used conventionally, the space immediately below the fuel injection pump can be used as a lubricating oil tank, and space utilization efficiency can be improved.

The side lid portion 23 is filled with the lubricating oil 17 stored in the lubricating oil tank 14.
Since the engine noise transmitted to the engine is attenuated, the noise leaking from the inspection window can be attenuated by the lubricating oil in the lubricating oil tank, and the engine becomes quiet.

In the lubricating oil tank 14, the upper end portion projects upward from the upper surface of the lubricating oil tank 14, the intermediate portion penetrates the inside of the lubricating oil tank 14, and the lower end portion projects downward from the lower surface of the lubricating oil tank 14. If the oil detecting rod pipe 32 is attached, the oil detecting work can be easily performed. That is, the oil detecting rod is conventionally provided in the oil pan 12, but in the marine engine, the oil pan 12 is located at the lower end of the cylinder block 10, that is, below the engine base, which makes the oil detecting operation difficult. On the other hand, as in the present invention, if the lubricating oil tank 14 arranged on the side surface of the cylinder block 10, that is, above the engine base, is provided with the oil detecting rod pipe 32, the oil pan 12 penetrates through the oil detecting rod pipe 32. It is possible to provide an oil-testing rod penetrating into the inside of the engine, which facilitates oil-testing work even in a marine engine.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a marine diesel engine adopting the present invention, FIG. 2 is a circuit diagram showing a lubricating system, FIG. 3 is a view taken in the direction of arrow III in FIG. 1, and FIG. 4 is a front view of a lubricating oil tank. Fig. 5 is a view taken in the direction of arrow V in Fig. 4, Fig. 6 is a view taken in the direction of arrow VI in Fig. 4, and Fig. 7
Fig. 8 is a sectional view taken along line VII-VII in Fig. 4, and Fig. 8 is taken along line VIII- in Fig. 4.
VIII sectional view, FIG. 9 is a IX-IX sectional view of FIG. 1
0 ... Cylinder block, 12 ... Oil pan, 14 ... Lubricating oil tank, 20 ... Inspection window, 23 ... Side lid part, 30 ... Main body,
41 ... Discharge port

Claims (2)

[Scope of utility model registration request] 1. An oil pan is provided at a lower end of a cylinder block of an internal combustion engine, an oil pump is provided inside the oil pan, a lubricating oil tank is provided separately from the oil pan, and an inspection window opened on a side surface of the cylinder block is formed. In the internal combustion engine, the lubricating oil tank is integrally formed with a side cover portion covering the inspection window, the lubricating oil tank is detachably provided on the cylinder block, and the lubricating oil tank covers the inspection window. The mounting structure of the lubricating oil tank for the semi-dry sump. 2. The lubricating oil tank has an upper end protruding upward from the upper surface of the lubricating oil tank, an intermediate portion penetrating the inside of the lubricating oil tank, and a lower end protruding downward from the lower surface of the lubricating oil tank. The structure for mounting a lubricating oil tank for a semi-dry sump according to claim 1, characterized in that a dipstick pipe is mounted.