JPH0151646B2 - - 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 a blazer (or breather) mechanism for an internal combustion engine that can tip over 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 further provided to prevent the oil in the first mist separator from entering the intake manifold. has been established. Specifically, for example, as shown in Fig. 4, an oil partition plate 3 is provided between the cylinder block 1 and the oil pan 2, and the opening 4 of the oil partition plate 3 is provided under the opening 4 when the engine is upright (Fig. 4). Install a check valve 5 that opens and closes when it falls upside down or close to it, and lubricates the inside of the oil pan 2 with lubricating oil (oil).
It communicates with the suction pipe 6. A breather chamber 7 provided on the side of the cylinder block 1 is connected to the first breather chamber 7 through a pipe 8.
The middle part of the mist separator 9 is connected to the upper end of the second mist separator 11 (about 9) via the pipe 10, and the middle part of the mist separator 11 is connected to the bottom of the second mist separator 9 (about 9). It is connected to an intake manifold 13 via a pipe 12. 14 is a cylinder head, and 15 is an exhaust manifold.

In the engine upright state shown in FIG. 4, the check valve 5 provided on the partition plate 3 between the oil pan 2 and the cylinder block 1 opens under the weight of the check valve itself, and the lubricating oil (oil) 16 is drawn as shown in the solid line. Enter the oil pan 2 as shown by the arrow. Engine mist is sucked into the intake manifold 13 via the mist separators 9 and 11.

When the engine is inverted at 180 degrees as shown in FIG. 5, 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 in through the pipe 10, the second mist separator 11 separates it from the mist 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. 6, 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. 4 to 6, 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.

(Objective of the Invention) The present invention minimizes the outflow of oil from inside the engine when the engine overturns, and only requires the provision of one small mist separator, and also prevents abnormal pressure inside the cylinder block even when the engine overturns. It is an object of the present invention to provide a blazer mechanism for an internal combustion engine that can be tipped over, which can effectively prevent the engine from rising.

(Structure of the Invention) The present invention provides a first valve having a check valve that closes the bottom of the mist separator and a portion of the cylinder block lower than the bottom of the mist separator only when the engine overturns.
Connected by a blazer, an oil partition plate with a check valve that closes only when the engine falls is installed between the cylinder block and the oil pan, and a second check valve is installed on the cylinder block that opens only when the internal pressure exceeds a specified level. This is a blazer mechanism for an internal combustion engine that can be tipped over, and is characterized by being equipped with a blazer.

(Example) In FIG. 1 showing an example, the same reference numerals as those in FIG. 4 indicate corresponding parts. In FIG. 1, a first blazer 19 is provided at the upper end of the cylinder head 14 communicating with the inside of the cylinder block 1, and has a check valve 18 that opens when the engine is upright and closes when the engine is upside down or nearly overturned. 1st blazer 19
communicates with the bottom of the small mist separator 20. The central part of the mist separator 20 has a suction hole 2
It communicates with the atmosphere via a pipe 21 having 1a.

A second blazer 23 having a check valve 22 that opens only when the pressure inside the cylinder block 1 rises above a predetermined value is provided on the bottom side wall of the cylinder block 1, and the tip of the second blazer 23 is opened to the atmosphere, or It communicates with the bottom of the mist separator 20 via a pipe indicated by a broken line 24 .

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 valve 5, and lubricating oil enters the oil pan 2. The mist from the engine is removed from the first valve with a check valve 18.
Enter the mist separator 20 from the blazer 19,
From there, it is discharged outside the engine via a pipe 21. The pipe 21 may be communicated with the intake manifold 13 to draw mist into the intake manifold 13. As mentioned above, the check valve 18 that opens when the engine is upright is provided in the first blazer 19. Various structures can be considered for this check valve 18, and a solenoid valve and a tilt sensor are linked. let me,
It may be configured to open when the engine is upright. Check valve 1
If a highly accurate valve is used as the valve 8, the mist separator 20 will be smaller. second blazer 2
3 is closed below the set pressure of the check valve 22, so no mist is discharged from here.

When the engine is in an inverted state (Fig. 2), the check valve 5 of the oil partition plate 3 and the check valve 18 of the first blazer 19 are closed by spring force or their own weight, preventing oil from flowing out from the oil pan 2. and first blazer 1
Oil leakage from 9 is also prevented. When the check valve 18 of the first blazer 19 is activated and the function as a blazer is stopped, and the pressure inside the engine increases due to engine blow-by gas, the check valve 22 of the second blazer 23 is opened and the function as a blazer is stopped. fulfill.

In the engine return state shown in FIG. 3, the oil in the mist separator 20 passes through the pipe 25 and returns to the oil pan 2 via the first blazer 19.

(Another Embodiment) A check valve having the same function as the check valve 18 in FIG. 4 may be provided at the connection between the upper end of the pipe 25 and the mist separator 20.

(Effects of the Invention) As explained above, in the present invention, the first blazer 19 has the check valve 18 that closes only when the engine overturns, and the oil partition plate 3 has the check valve 5 that closes only when the engine overturns. Since this is provided, when the engine falls over, the oil in the oil pan 2 will flow to the cylinder head 1.
It is possible to effectively prevent the transition to the 4 side, and at the same time,
It is possible to satisfactorily prevent the oil in the cylinder block 1 from moving toward the mist separator 20, and therefore to minimize the outflow of oil from the inside of the engine to the mist separator 20. Moreover, since the amount of oil flowing out from the inside of the engine to the mist separator 20 is very small, the pipe 21 for discharging the mist from the mist separator 20 is By appropriately setting the position of the suction hole 21a in the mist separator 20, oil will not be sucked through the pipe 21 either when the engine is upright or when the engine is overturned. From the above, it is sufficient to provide only one small mist separator 20.
The external dimensions of the engine are compact, making it easy to install on lifeboats with limited space. Further, the first blazer 19 functions as a blazer during normal operation (upright state), and when it falls over, it is stopped by the check valve 18, so the function as a blazer is stopped. When the vehicle falls over (inverted state), the second blazer 23 (with check valve 22) functions. Note that in the upright state, the second blazer 23 does not function as a blazer because it has the check valve 22. In this way, the first and second blazers 19, 23, check valve 18, check valve 22, etc. function effectively not only when standing upright but also when falling down, and the desired purpose can be achieved with only a few parts. Equipment costs are reduced. Also, cylinder block 1
In addition, a second blazer 23 with a check valve 22 that opens only when the pressure inside the cylinder block 1 exceeds a predetermined value is provided, so that when the engine is upright with the check valve 18 of the first blazer 19 open, the first blazer 23 is installed. The discharge of mist from the second blazer 23 can be effectively prevented, and when the engine is overturned when the check valve 18 of the first blazer 19 is closed, the pressure inside the cylinder block 1 can be effectively prevented from rising abnormally. In addition, the bottom of the mist separator 20 and the cylinder block 1
Since the part lower than the bottom of the mist separator 20 is connected with the first blazer 19, when the engine returns to the upright state after falling, the oil accumulated in the mist separator 20 is transferred through the first blazer 19. It can be returned to oil pan 2.

In the present invention, "when the engine is upright" means a normal operating state in which the engine is not inverted. .

[Brief explanation of drawings]

Fig. 1 is a schematic vertical cross-sectional view of the blazer mechanism according to the present invention, Figs. 2 and 3 are explanatory views of its operation, Fig. 4 is a schematic vertical cross-sectional view showing the conventional structure, and Figs. 5 and 6 are explanatory views of its operation. be. DESCRIPTION OF SYMBOLS 1... Cylinder block, 2... Oil pan, 3... Oil partition plate, 5... Check valve, 14... Cylinder head, 18... Check valve, 19... First blazer, 23... Second blazer.

Claims (1)

[Claims] 1. The bottom of the mist separator and the part of the cylinder block lower than the bottom of the mist separator are connected by a first blazer having a check valve that closes only when the engine falls, and between the cylinder block and the oil pan. An overturnable internal combustion engine characterized in that the cylinder block is provided with an oil partition plate having a check valve that closes only when the engine overturns, and the cylinder block is provided with a second blazer with a check valve that opens only when the internal pressure exceeds a predetermined pressure. Agency Blazer Mechanism. 2. A blazer mechanism for an internal combustion engine that can be tipped over as claimed in claim 1, wherein the first blazer is attached to the cylinder head at the upper end of the cylinder block. 3. A blazer mechanism for an internal combustion engine that can be tipped over as claimed in claim 1, wherein the first blazer is attached to a mist separator.