JPS6023489Y2 - Internal combustion engine oil pan device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil pan device for an internal combustion engine.

Conventionally, the oil pan, which is fixed to the lower part of the cylinder block of an internal combustion engine by bolts, etc., is provided with a partition member that connects both side walls of the oil pan in order to prevent oil from rippling. Regardless of the number of cylinders in the internal combustion engine and the position of the cylinders, e.g.
Each can be placed at any location.

However, these partition members do not have a function of actively suppressing vibrations of the cylinder block itself, and are provided solely to prevent oil from rippling.

On the other hand, vertical rib members are usually provided on the wall of the oil pan for reinforcement, but their role is to strengthen against the longitudinal deflection of the oil pan, and therefore reduce the vibration of the cylinder block. It has no suppressive function.

Further, since the partition wall member connecting the both side walls is formed of a wall plate, the partition wall member itself may promote vibration of the oil pan wall surface, which is a problem.

Therefore, in order to solve the above-mentioned problems, the present invention provides an oil pan for an internal combustion engine that suppresses the vibration of the cylinder block by using a partition member and ribs that reinforce the oil pan itself, thereby reducing the noise of the internal combustion engine. The purpose is to provide a device.

An oil pan device for an internal combustion engine according to the present invention that achieves the above object is an oil pan fixed to a lower part of a cylinder block of an internal combustion engine, and the oil pan is arranged below the center line of each cylinder provided in the cylinder block. It is reinforced by a partition member that connects both side walls of the oil pan, and a horizontal rib that intersects with the partition member and continues to the inner wall of the oil pan.

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiment of the present invention shown in FIG. 1, FIG. 2, and FIG. The ribs 2a are arranged so as to almost coincide with the center lines C1, C2, C3, and C4, and the upper ends of these partition wall members 2 have a T-shaped cross section, and the ribs 2a are formed with a large curvature. It is connected to the surfaces of the side walls 1a and lb.

Further, an oil circulation hole 2b is provided in the lower part of the partition member 2.

Furthermore, a horizontal rib member 3 that intersects with the partition member is continuously projected from the inner wall of the oil pan.

Next, the effect of suppressing the vibration mode in the cylinder block 4 of the internal combustion engine to which the oil pan device is fixed in the embodiment of the present invention will be explained with reference to FIGS. FIG. 7 is a schematic plan view of the cylinder block 4 viewed from the bottom.

First, since the inner wall of the oil pan is reinforced by a continuous horizontal rib member 3 intersecting with the partition wall member 2, the vibration mode M1 of the cylinder block 4 as shown in FIG. 4 and the vibration mode M1 in FIG. The vibration mode M2 of the cylinder block 4 as shown can be effectively suppressed.

In addition, the partition member 2 that connects both side walls 1a and lb of the oil pan 1 not only prevents the oil from undulating, but also
It is possible to effectively suppress the vibration mode M3 of the cylinder block 4 as shown in FIG. , C2, it is possible to reinforce the portion of the cylinder block 4 that tends to become a vibration antinode, and effectively suppress the vibration mode of the cylinder block depression 4 indicated by M.

That is, in the cylinder block 4 shown in FIG. 7, both sides of the center line A of the crankshaft can be connected to each other by bearings, but the center lines B1, . Each central portion between B2 and 83, that is, the cylinder center line C1 and C2, is
Since the pistons move up and down directly, they cannot be connected; however, in the present invention, both side walls 1 on the oil pan 1 side are arranged below the cylinder center line C, C2 of the cylinder block 4.
By reinforcing the cylinder block 4 with the partition wall member 2 connecting between a and lb, the vibration mode M4 on each cylinder center line C1, C2 of the cylinder block 4 can be effectively suppressed.

Moreover, a collar portion 2a having a T-shaped cross section is provided at the upper end of the partition wall member 2.
, the vibration of the partition wall member 2 itself is suppressed, and the vibration mode M of the cylinder valve 4 shown in FIG. 4 is suppressed.
□ more effectively.

In short, the oil pan device for an internal combustion engine according to the present invention has an oil pan reinforced with a partition member that connects both side walls of the oil pan and a horizontal rib that intersects with the partition member and continues to the inner wall. Vibrations of the cylinder block to which the pan is fixed can be effectively suppressed.

Furthermore, the cylinder center portion on the cylinder block side is reinforced by the partition wall member that connects both side walls of the oil pan itself, and the vibration mode of the cylinder center portion of the cylinder block can be effectively suppressed.

Therefore, by suppressing the vibration of the cylinder block, it is possible to reduce the noise of the internal combustion engine.

Note that the present invention is effective for all oil pans of internal combustion engines.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are a plan view, a side sectional view, and a longitudinal sectional view, respectively, of an oil pan in an embodiment of the present invention;
FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are schematic plan views showing each vibration mode when viewed from the bottom of a cylinder block to which an oil pan according to an embodiment of the present invention is applied. la, lb...Side wall, 2...Partition member, 2a...Brim part, 3...Rib member,
4...Cylinder tab failure, C1, C2, C3,
C4...Cylinder center line.

Claims (1)

[Scope of utility model registration request] In an oil pan fixed below a cylinder block of an internal combustion engine, the oil pan is connected to a partition member arranged below the center line of each cylinder provided in the cylinder block and connecting both side walls of the oil pan, and a partition member that intersects with the partition member. An oil pan device for an internal combustion engine that is reinforced with horizontal ribs that extend along the inner wall of the oil pan.