JPH0874547A - Oil pan device for internal combustion engine - Google Patents

Abstract

(57) [Abstract] [Purpose] Oil of an internal combustion engine that helps the flow of oil to the deep bottom, improves the original function of the oil pan, and increases the rigidity of the oil pan itself by providing a fluid passage. Providing bread equipment. [Structure] A lower mounting bracket 24 is provided on the front side of the deep bottom portion 4 and near the bottom surface of the right side wall, and is connected to the flange surface 15 by a rib member 17 and the like, and is approximately at the center of the shallow bottom portion 5 and near the bottom surface of the left side wall 18. An upper mounting bracket 34 is provided on the. Here, the mounting surface 33 is located above the mounting surface 23. Then, the oil passage 41 was fixed inside the oil pan 6 toward the downstream of the air flow generated by the rotation of the crankshaft 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pan device for an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, as an oil pan device for an internal combustion engine,
For example, there are the following. The engine body of a multi-cylinder internal combustion engine includes an oil pan having a deep bottom portion and a shallow bottom portion provided along the crankshaft on the open lower surface of a cylinder block that rotatably supports the crankshaft. here,
The deep bottom portion of the oil pan stores the oil sucked up by the oil pump, and the shallow bottom portion is filled with the oil that has lubricated the internal combustion engine parts. (Actual Kaihei 2-
56806, Japanese Utility Model Publication No. 4-82344, etc.).

On the other hand, recently, the engine room in which the internal combustion engine is mounted is also highly densified, and an oil filter for purifying the oil sucked up by an oil pump and an oil supply destination are opposed to each other via the oil pan. There is also an internal combustion engine having a structure arranged in the.

[0004]

By the way, in an internal combustion engine having a structure in which an oil supply destination is arranged to face an oil filter via an oil pan, an oil supply passage is provided outside the oil pan. When it is provided, there are problems such as a complicated layout and a complicated oil supply passage, which increases the number of bends and the like, and increases the pressure loss when oil passes. Further, when the oil supply passage interferes with other equipment and oil leaks from the passage, the oil may be spilled into the engine room and may not be recovered.

Therefore, a fluid passage is provided inside the oil pan. However, if the fluid passage is provided inside the oil pan without considering the direction in which the oil flows down, the flow of the oil to the deep bottom portion may be obstructed and the original function of the oil pan may be impaired. Further, since the oil pan is usually made of a material having a small plate thickness, the rigidity of the oil pan may be lowered by providing a portion for penetrating the fluid passage or the like.

The present invention has been made in view of the above-mentioned conventional circumstances, and in providing the fluid passage inside the oil pan, the oil is guided to a desired position to improve the original function of the oil pan, and further to improve the fluid passage. An object of the present invention is to provide an oil pan device for an internal combustion engine that can increase the rigidity of the oil pan itself by providing it.

[0007]

Therefore, the present invention provides an oil pan device for an internal combustion engine, which is mounted on the open lower surface of a cylinder block that rotatably supports a crankshaft.
A fluid passage, which is directed to the downstream side of the air flow generated by the rotation of the crankshaft and is inclined downward, is fixed to the inside of the oil pan.

Further, in an oil pan device having a deep bottom portion and a shallow bottom portion provided along the crankshaft, the fluid passage is slanted so as to be positioned downward as it traverses the fluid passage toward the deep bottom portion. It may be provided. Further, in an oil pan device for an internal combustion engine having an oil guide plate rising from the bottom surface on the bottom surface of the oil pan, the upper end portion of the fluid passage may be provided at a position substantially at the same height as the tip of the oil guide plate. .

Further, the fluid passage may be fixed to a highly rigid portion of the oil pan. The fluid passage may be an oil passage.

[0010]

The oil that lubricates the rotation system of the crankshaft flows down from the open bottom surface of the cylinder block to the oil pan. On the other hand, an air flow in the same direction as the rotation direction of the crankshaft is generated inside the oil pan due to the rotation of the crankshaft. Here, in the above-mentioned configuration, since the fluid passage facing the downstream of the air flow generated by the rotation of the crankshaft is fixed inside the oil pan, the fluid flowing down from the open lower surface of the cylinder block The oil that has flowed down to the upper surface of the passage is subjected to a fluid force in the direction in which the air flow further downwards, and since the fluid passage is inclined downward, it also receives gravity in the direction in which it falls. The flow down is smooth.

Further, as an operation of the invention described in claim 2, in the oil pan device in which the deep bottom portion and the shallow bottom portion are provided along the crankshaft, the deep bottom portion is traversed by the fluid passage across the deep bottom portion and the shallow bottom portion. In the case where the fluid passage is provided obliquely so as to be located downward as it goes toward, the fluid passage is provided obliquely so as to be located downward as it goes toward the deep bottom portion, so that the fluid passage is formed from the open lower surface of the cylinder block. The oil that has flowed down to the upper surface is directed to the deep bottom, and since the fluid passages cross the deep bottom and the shallow bottom, the oil that has flowed down to the shallow bottom is further encouraged to be stored in the deep bottom.

Further, as an operation of the invention described in claim 3, in an oil pan device of an internal combustion engine having an oil guide plate rising from the bottom surface on the bottom surface of the oil pan, the upper end portion of the fluid passage is provided at the tip of the oil guide plate. When it is provided at a position approximately the same height as the above, the oil that has flowed down into the fluid passage does not drip from the fluid passage to the oil guide plate, but rather flows down from the fluid passage along the oil guide plate, and the oil drops. Accordingly, the generation of bubbles is prevented.

Further, as an action of the invention described in claim 4, when the fluid passage is fixed to a portion of the oil pan having high rigidity, the fluid passage serves as a reinforcing member for connecting the portion of the oil pan having high rigidity. It acts and further increases the rigidity of the oil pan. Further, as an action of the invention described in claim 5, when the fluid passage is an oil passage, even if the oil passing through the oil passage leaks, the oil leaks into the oil pan. Improves reliability.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In an engine body 1 of a multi-cylinder internal combustion engine shown in FIGS. 1 to 3, a cylinder block 3 that rotatably supports a crank shaft 2 and an open lower surface of the cylinder block 3 are attached to extend along the crank shaft 2. And an oil pan 6 provided with a deep bottom portion 4 on one side and a shallow bottom portion 5 on the other side.

The deep bottom part 4 is made of a steel plate having a plate thickness of 1 mm, and the shallow bottom part 5 is made of a steel plate having a plate thickness of 2.5 mm. The deep bottom part 4 is bolted (not shown) to the joint flange surface 12 of the shallow bottom part 5. Etc. are fastened and fixed. A baffle plate 7 is attached to the oil pan 6, and an oil suction port 9 having an oil strainer 8 at its tip is inserted into a notch provided in the baffle plate 7 so that the oil strainer 8 penetrates into the oil. By soaking, the oil supplied to the lubricated part is sucked by an oil pump (not shown).

The oil sucked by the oil pump is
The oil is supplied to a main gallery communication passage 11 and the like communicating with a main gallery (not shown) through an oil filter 10 attached to the outside of the oil pan 6. Here, in this embodiment, the crankshaft 2 rotates clockwise in the sectional view of FIG. 1 (indicated by an arrow N in FIG. 1). 2 and 3, the left side is the front side and the right side is the rear side.

Further, an oil guide plate 14 rising from the bottom surface 13 of the shallow bottom portion 5 of the oil pan 6 is provided, and the oil flowing from the shallow bottom portion 5 to the deep bottom portion 4 extends along the guide plate 14. It is designed to flow. On the front side of the deep bottom part 4 and in the vicinity of the bottom surface of the right side wall, an inlet side communication passage 22 that extends downward from the flange surface 15 of the oil pan 6 and communicates with the main gallery communication passage 11 is provided, A lower mounting bracket 24 having a mounting surface 23 on the lower surface is provided by being connected to the flange surface 15 by a rib member 17 or the like.

Furthermore, at the substantially central portion of the shallow bottom portion 5 and on the left side wall
In the vicinity of the bottom surface of the oil pan 18, an outlet side communication passage 32 that extends upward from the bottom surface 13 of the oil pan 6 and that communicates with the turbo lubrication gallery 31 is provided, and an upper mounting bracket having a mounting surface 33 on the upper surface. 34 is provided by being connected to the left side wall 18 by a rib member 19 and the like. The position of the mounting surface 33 in the height direction is provided above the mounting surface 23, and is at the same height as the tip portion 16 of the guide plate 14.

Further, an oil passage 41 having a lower mounting boss 42 and an upper mounting boss 43 at both ends is fixed inside the oil pan 6. The fixing is performed by fastening the bolt 44 from the lower mounting boss portion 42 to the mounting surface 23 of the lower mounting bracket 24 from below and further bolting the upper mounting boss portion 43 from above to the mounting surface 33 of the upper mounting bracket 34. It is done by concluding 45.

That is, the oil passage 41 crosses the shallow bottom portion 5 and the deep bottom portion 4 from the mounting surface 33 near the bottom surface on the left side at the substantially central portion of the shallow bottom portion 5 and in front of the deep bottom portion 4 and near the bottom surface on the right side. It is provided obliquely in the oil pan 6 toward the mounting surface 23 of the. Next, the operation will be described. Oil that lubricates the rotation system of the crankshaft 2 and the drive system of the intake / exhaust valve (not shown) flows down into the oil pan 6 through the cylinder block 3. On the other hand, the crankshaft 2 is rotating in the clockwise direction, and due to the rotation of the counterweight provided on the crankshaft 2 and the like, an airflow in the same direction as the clockwise direction is also generated in the oil pan 6. .

Here, in the present embodiment, the oil passage
41, the lower mounting boss portion 42 is fastened to the lower mounting bracket 24, and the upper mounting boss portion 43 is further fixed to the upper mounting bracket 24.
By fastening the oil passage 41 to the oil passage 41 from the mounting surface 33 in the approximate center portion of the shallow bottom portion 5 and near the bottom surface on the left side, across the shallow bottom portion 5 and the deep bottom portion 4, on the front side of the deep bottom portion 4 and on the right side. It is provided obliquely in the oil pan 6 toward the mounting surface 23 near the bottom surface. Further, the mounting surface 33 to which the upper mounting boss portion 43 is mounted is provided such that the position in the height direction is located above the mounting surface 23 to which the lower mounting boss portion 42 is mounted, so that the crankshaft 2 An oil passage 41, which is directed to the downstream side of the air flow generated by rotation and is inclined downward, is fixed inside the oil pan 6. That is, the oil passage 41 is provided in the direction of the combined force of the fluid force and gravity generated by the flow of the air flow.

Therefore, even when the oil flowing down to the oil pan 6 flows down to the upper surface 41a of the oil passage 41,
Due to the combined force, a fluid force is applied in a direction from the upper mounting boss portion 43 to the lower mounting boss portion 42, that is, in a further downward direction, so that the oil surface of the oil passage 41 can smoothly flow down. Flows smoothly to the deep bottom 4.

Here, since the deep bottom portion 4 of the oil pan is a portion where the oil suction port 9 having the oil strainer 8 is infiltrated to suck the oil, it is necessary to store the oil sucked by the oil pump. However, in this embodiment, not only the oil flowing down to the shallow bottom 5 but also the oil flowing down to the upper surface 41a of the oil passage 41 smoothly flows to the deep bottom 4, so that the oil is stored in the deep bottom 4. ,
It will be more urgent.

Further, the mounting surface of the upper mounting bracket 34
Since the position of 33 in the height direction is at the same height as the tip 16 of the guide plate 14, the oil that has flowed down to the upper surface 41a of the oil passage 41 near the upper mounting boss portion 43 is
Since it does not drip from the a to the guide plate 14 and continuously flows down, generation of bubbles when the oil droplet drips into the oil is prevented. Therefore, it is possible to prevent the occurrence of cavitation when the oil is sucked up by the oil pump, and it is possible to improve the performance.

Further, the oil passage 41 is attached to the lower boss portion.
42 is fastened to the lower mounting bracket 24, and further the upper mounting boss portion 43 is fastened to the upper mounting bracket 34. The lower mounting bracket 24 is connected to the flange surface 15 and the rib member 17.
Since the upper mounting bracket 34 is connected to the left side wall 18 and the rib member 19 and the like, the oil passage 41 substantially connects the flange surface 15 and the left side wall 18. It will be fixed to. Here, since both the flange surface 15 and the left side wall 18 are parts with high composition, the oil passage 41 acts as a reinforcing member that connects the parts of the oil pan 6 with high rigidity, and the rigidity of the oil pan 6 is improved. This will have the effect of further enhancing the effect.

Further, in this embodiment, since the reinforcing member is obliquely interposed, the torsional rigidity is improved. Further, although the case where the fluid passage is the oil passage 41 is described in the present embodiment, it goes without saying that the fluid passage may be a cooling water passage, for example. When the fluid passage is the oil passage 41, the oil passage 41 connects the inlet-side communication passage 22 and the outlet-side communication passage 32, and oil is supplied to the turbo through the turbo lubrication gallery 31. However, even if the oil leaks from the oil passage 41 due to deterioration over time, the leaked oil leaks into the oil pan 6 and the reliability of the apparatus is improved.

[0027]

As described above, according to the first aspect of the invention, even when the oil flowing down from the open lower surface of the cylinder block flows down to the upper surface of the fluid passage,
The flow down is done smoothly, the oil return is good,
There is an effect that the reduction of the oil amount can be prevented, the occurrence of a trouble at the time of oil supply can be prevented without lowering the oil level.

Also, in the second aspect of the invention, the oil flowing down from the open lower surface of the cylinder block to the upper surface of the fluid passage is directed to the deep bottom portion, and the fluid passage traverses the deep bottom portion and the shallow bottom portion. Therefore, the oil flowing down to the shallow bottom is more promoted to be stored in the deep bottom, and there is an effect that the reduction of the oil amount can be prevented. In the invention according to claim 3, oil is prevented from dripping from the fluid passage to the oil guide plate, and bubbles are prevented from being generated when the oil drops are dropped into the oil. There is an effect that it is possible to improve the performance when sucking up the oil.

Further, in the invention described in claim 4,
Since the fluid passage acts as a reinforcing member for connecting the highly rigid portion of the oil pan to further enhance the rigidity of the oil pan, there is an effect that the vibration resistance is improved and the noise caused by the vibration can be prevented. Further, in the invention described in claim 5, there is an effect that the reliability of the device is improved.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of an oil pan of an internal combustion engine according to the present invention (a sectional view taken along line AA in FIG. 3).

FIG. 2 is a schematic cross-sectional view of an oil pan of an internal combustion engine according to the present invention (cross-sectional view taken along the line BB in FIG. 3).

FIG. 3 is a schematic plan view of an oil pan of an internal combustion engine according to the present invention.

[Explanation of symbols]

 2 crankshaft 3 cylinder block 4 deep bottom 5 shallow bottom 6 oil pan 14 oil guide plate 15 flange surface 17 rib member 19 rib member 24 lower mounting bracket 34 upper mounting bracket 41 oil passage 42 lower mounting boss 43 upper mounting boss

Claims (5)

[Claims] 1. An oil pan device for an internal combustion engine mounted on an open lower surface of a cylinder block that rotatably supports a crankshaft, the fluid being directed downstream of an airflow generated by rotation of the crankshaft and inclined downward. Through the passage
An oil pan device for an internal combustion engine, wherein the oil pan device is fixed to the inside of the oil pan. 2. An oil pan device for an internal combustion engine, wherein a deep bottom portion and a shallow bottom portion are provided along a crankshaft, so that the fluid passage is located downward as it traverses the fluid passage toward the deep bottom portion. The oil pan device for an internal combustion engine according to claim 1, wherein the oil pan device is provided obliquely. 3. An oil pan device for an internal combustion engine having an oil guide plate rising from the bottom on the bottom of the oil pan, wherein the upper end portion of the fluid passage is provided at a position substantially flush with the tip of the oil guide plate. The oil pan device for an internal combustion engine according to claim 1 or 2, characterized in that. 4. The fluid passage is fixed to a highly rigid portion of an oil pan.
An oil pan device for an internal combustion engine according to item 3. 5. The oil pan device for an internal combustion engine according to claim 1, wherein the fluid passage is an oil passage.