JPH0151648B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is applicable to engines such as those for lifeboats (enclosed lifeboats) mounted on tankers.
This relates to the blazer (or breather) mechanism of an internal combustion engine that may overturn 360 degrees.

(Prior art) Conventionally, a first mist separator was provided to prevent the oil in the cylinder block from flowing out when the engine overturned, and a second mist separator was provided to prevent the oil in the first mist separator from entering the intake manifold. A separator is provided. Specifically, for example, the second
As shown in the figure, an oil partition plate 3 is installed between the cylinder block 1 and the oil pan 2, and the lower side of the opening 4 of the oil partition plate 3 is opened when the engine is upright (Fig. 2) and the engine is turned upside down or almost upside down. Check valve 5 that closes when
is installed, and the inside of the oil pan 2 is communicated with the lubricating oil (oil) suction pipe 6. A breather chamber 7 provided on the side of the cylinder block 1 is connected to the bottom of a first mist separator 9 (approximately 9) via a pipe 8.
The center of the mist separator 9 is connected to the upper end of a second mist separator 11 (approximately 9) via a pipe 10, and the center of the mist separator 11 is connected to an intake manifold 13 via a pipe 12. 14 is a cylinder head, and 15 is an exhaust manifold.

In the upright state of the engine shown in FIG. 2, the check valve provided on the partition plate 3 between the oil pan 2 and the cylinder head 1 opens under its own weight, and the lubricating oil (oil) 16 flows as shown by the solid line arrow. into oil pan 2. Engine mist is mist separator 9,1
1 to the intake manifold 13.

When the engine is inverted at 180 degrees as shown in FIG. 3, the check valve 5 is closed by the spring force and the weight of the lubricating oil, preventing oil from flowing out from the oil pan 2. Further, the lubricating oil flowing out through the breather chamber 7 is retained by the first mist separator 9 having a large capacity (approximately 9), and only the mist is sucked into the intake air. In the unlikely event that
Even if the lubricating oil is sucked through the pipe 10, it is separated from the mist by the second mist separator 11, and only the mist is sucked into the intake air to prevent danger.

When the engine returns to the upright state as shown in FIG. 4, the oil in the first mist separator 9 returns to the oil pan 2 through the pipe 8.

As explained above, conventionally, as shown in Figs. 2 to 4, two large mist separators 9 and 11 are used, which increases the external dimensions of the engine.
It is unsuitable for lifeboats with limited space.

(Object of the Invention) An object of the present invention is to provide a blazer mechanism for an internal combustion engine that can be tipped over, which can eliminate check valves and check valves other than the check valve of the oil partition plate, and which can make the entire engine more compact.

(Structure of the Invention) The present invention provides a mist separator at a position lower than the top of the cylinder head and higher than the bottom of the cylinder block, and connects the cylinder head and the mist separator via a first blazer and a first mist pipe. An oil partition plate with a check valve that closes only when the engine falls is installed between the oil pans, and the bottom of the cylinder block is connected to the bottom of the mist separator via a second blazer and a second mist pipe. A blazer mechanism for an internal combustion engine that can be tipped over is characterized in that one end of a third mist pipe is opened at the center of the mist separator, which is further away from the oil level in the cylinder block when the engine is upright.

(Example) In FIG. 1 showing an example, the same reference numerals as those in FIG. 2 indicate corresponding parts. In FIG. 1, a first blazer (breather chamber) 19 is provided above (top) the valve arm chamber at the upper end of the cylinder head 14 which communicates with the inside of the cylinder block 1, and this first blazer 19 is connected to a first mist pipe 21. It communicates with the upper end portion of the small-sized mist separator 20 through it. The mist separator 20 is arranged at a position lower than the top of the cylinder head 14 and higher than the bottom of the cylinder block 1, and the mist suction pipe 22 in the center is connected to the intake manifold 13 via a third mist pipe 23 and an intake silencer 24. It's communicating. The opening position of the upper end of the mist suction pipe 22 occupies a position in the center of the mist separator that is further down by H when the engine is upright than the oil level position A-A in the cylinder block 1 when the engine is overturned by 180 degrees. , the distance H is made as large as possible.

A second breather 25 (breather chamber) provided on the bottom side wall of the cylinder block 1 communicates with the bottom of the mist separator 20 via a second mist pipe 26. The second blazer 25 is simply a breather chamber that communicates with the inside of the cylinder block 1, so that the inner bottom of the cylinder block 1 is connected to the mist separator 2.
It is directly connected to the bottom of 0.

Next, the operation will be explained. In the upright state of the engine shown in FIG. 1, the check valve 5 provided on the oil partition plate 3
is opened by the weight of the check valve 5, and lubricating oil enters the oil pan 2. The engine mist flows from the first blazer 19 to the first mist pipe 21, which does not have a check valve or the like.
The mist enters the mist separator 20 and is sucked into the engine from there through the mist suction pipe 22, the third mist pipe 23, and the intake manifold 13.

When the engine is in an inverted state, the check valve 5 of the oil partition plate 3 is closed by spring force or its own weight, and oil is prevented from flowing out from the oil pan 2. Also, the oil in cylinder block 1 is at oil level A-A.
Therefore, even if the oil in the cylinder block 1 passes through the first blazer 19 and the first mist pipe 21 and enters the mist separator 20, the mist will be dispersed at a position H above the oil level A-A at that time. Since the suction pipe 22 is open, there is no fear that oil will be sucked into the mist suction pipe 22. Of course, the first blazer 19 stops functioning as a blazer, and when the pressure inside the engine increases due to engine blow-by gas, only the second blazer 25 functions as a blazer.

Next, when the erect state shown in FIG. 1 is restored, the oil that had previously entered the mist separator 20 up to the A--A plane returns to the oil pan 2 through the second mist pipe 26.

(Effects of the Invention) As explained above, in the present invention, the mist separator 20 is provided at a position higher than the bottom of the cylinder block 1, and this mist separator 20 is
It is directly connected to the cylinder head 14 via the blazer 19 and the first mist pipe 21, and the bottom of the mist separator 20 is directly connected to the bottom of the cylinder block 1 via the second blazer 25 and the second mist pipe 26.゜Cylinder block 1 during fall
An excellent arrangement is adopted in which one end of the third mist pipe 23 is opened in the center of the mist separator 20, which is further away from the oil level inside when standing upright, so the first blazer 19 and the second blazer 25
In addition, even if the engine falls over, the oil can be kept in the third mist pipe 23 without providing a check valve or check valve inside the third mist pipe 23, and without providing a complicated partition inside the mist separator 20. The blazer will not be sucked in and the blazer function will not be lost. Therefore, manufacturing costs can be reduced. Furthermore, since the mist separator 20 is provided at a position lower than the top of the cylinder head 14 and higher than the bottom of the cylinder block 1, the entire engine can be made compact, and the engine can be used in situations where space is limited, such as in a lifeboat mounted on a tanker. Installation is extremely easy.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a blazer mechanism according to the present invention, FIG. 2 is a schematic vertical cross-sectional view showing a conventional structure, and FIG.
4 are explanatory diagrams of the operation of the conventional structure. 1...
Cylinder block, 2... Oil pan, 3... Oil partition plate, 5... Check valve, 14... Cylinder head, 1
9, 25...first, second blazer, 20...mist separator, 21,26,23...first, second, third
mist pipe.

Claims (1)

[Scope of Claims] 1. A mist separator is provided at a position lower than the top of the cylinder head and higher than the bottom of the cylinder block, and the cylinder head and the mist separator are directly connected via a first blazer and a first mist pipe, and the cylinder block and oil are directly connected. An oil partition plate with a check valve that closes only when the engine falls is installed between the pans.
The bottom of the cylinder block is directly connected to the bottom of the mist separator via the second blazer and the second mist pipe, and the center of the mist separator is located further away from the oil level in the cylinder block when it is 180° turned down when it is upright. A blazer mechanism for an internal combustion engine that can be tipped over, characterized in that one end of a third mist pipe is open. 2. The blazer mechanism for a fallable internal combustion engine according to claim 1, wherein the other end of the third mist pipe is connected to the intake manifold. 3. A blazer mechanism for an internal combustion engine that can be tipped over as claimed in claim 1, wherein the other end of the third mist pipe is opened to the atmosphere.