JP3025862B2 - Engine lubrication system with increased oil pan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating apparatus for an engine with an oil pan, and more particularly, to a lubricating apparatus for an air pan from an oil pan to an oil pan above the oil pan.

[0002]

BACKGROUND OF THE INVENTION For the purpose of continuously operating an engine without oil change for a relatively long time, an engine provided with an increased oil pan is used.

[0003] The present invention is directed to a lubricating apparatus for an engine with an increased oil pan, the basic structure of which is shown in FIG.
As shown in the figure, an increasing oil pan 2 is provided below the oil pan 1 of the engine E, a lubrication pump 4 is provided on one side wall 3 of the engine E, and the oil pan 1 is connected to the increasing oil pan 2 via an oil return path 6. The lubrication pump 4 is connected to the oil pan 1 via a suction passage 5.

[0004]

2. Description of the Related Art The prior art of this type includes actual
No. 25617 (see FIG. 8), one large-diameter oil return pipe 6 extends vertically across the bottom wall 1a of the oil pan 1 and the upper wall 2a of the oil pan 2 of the horizontal diesel engine E. There are things that penetrate.

[0005]

In the above prior art, since the inside diameter of the oil return pipe 6 is formed large, the air of the increased oil pan 2 easily escapes from the oil return pipe 6 to the oil pan 1 above. Although it is possible to prevent air from staying above the increased oil pan 2, the strength of the engine body may be reduced by the large inner diameter of the oil return pipe 6.

For this reason, it is conceivable to reduce the inner diameter of the oil return pipe 6 to increase the strength of the engine body.
In this case, it is difficult for air to escape from the increased oil pan 2 to the oil pan 1 through the oil return pipe 6, and the return of the lubricating oil from the oil pan 1 to the increased oil pan 2 becomes poor, and the lubrication performance of the engine E is reduced. There is a risk of adverse effects. An object of the present invention is to achieve good bleeding of air from an increased oil pan and maintenance of the strength of the engine main body of an engine with an increased oil pan.

[0007]

Means for achieving the above object will be described below with reference to FIGS. 1 to 7 showing an embodiment. That is, the present invention 1 is a lubricating device for an engine with an increased oil pan having the basic structure described above, wherein an oil return case 7 is vertically installed over the oil pan 1 and the increased oil pan 2, and the oil return case 7 is The one side wall 3
And two oil return passages 6 are provided in parallel in the oil return case 7 by being distributed to the left and right.

A second aspect of the present invention is characterized in that, in the first aspect of the present invention, a suction path 5 for the lubricating pump 4 is provided in the oil return case 7. The engine E
May be vertical or horizontal.

[0009]

[Action]

(1) In the present invention 1, the oil pan 1 and the increased oil pan 2
The oil return case 7 is installed over the oil return case 7 and is divided into two in the oil return case 6 in the oil return case 7.
Since the 6 are provided in parallel, air is dispersed from the increased oil pan 2 to the oil pan 1 through the two oil return paths 6 to the left and right, and the air is easily removed. Further, since the two oil return paths 6 are provided in a dispersed manner, the strength of the engine body does not locally decrease and the strength is maintained higher than in the conventional art in which one large-diameter oil return path 6 is provided. it can.

In addition, since two oil return paths 6 are provided in the oil return case 7 in a distributed manner on the left and right, the engine E
When the oil is inclined in the left-right direction, the return of the lubricating oil from the oil pan 1 to the increased oil pan 2 can be smoothly ensured through one of the oil return paths 6.

(2) In the present invention 2, the oil return case 7
Since the suction passage 5 for the lubrication pump 4 is provided in the interior, there is no need to connect the oil pan 1 and the increased oil pan 2 with a suction pipe for the lubrication pump 4, and the number of assembly steps for the lubrication device is reduced, and the appearance is good. become. In addition, since the suction passage 5 is arranged on the side of the one side wall 3 on which the lubrication pump 4 is arranged, the oil return case 7 is assembled so that the increased oil pan 2 can be easily connected to the lubrication pump 4 via the suction passage 5.
Can be connected to the suction port.

[0012]

【The invention's effect】

(1) In the first aspect of the present invention, since two oil return paths are provided in the oil return case in a dispersed manner on the left and right, air is easily removed, and it becomes difficult for air to accumulate in the increased oil pan. Specifically, the strength of the crankcase or oil pan) can be kept high. Further, since the return of the lubricating oil can be distributed to the left and right oil return paths, the inclination performance of the engine in the left-right direction can be enhanced.

(2) According to the second aspect of the present invention, since the oil return case is provided with the suction passage for the lubrication pump, the number of assembly steps of the lubrication device is reduced, the lubrication device can be implemented at low cost, and the appearance is improved.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a lubricating device for a vertical engine with an increased oil pan showing a first embodiment, FIG. 2 is a right side view of a longitudinal section of a main portion around an oil return path of the lubricating device, and FIG. FIG. 4 is a plan view, and FIG. 4 is a right side view in vertical section of a main part around a suction passage of a lubrication pump of the lubrication device.

As shown in FIG. 1, an oil pan 1 is provided below a crankcase 8 of the vertical engine E, and an increasing oil pan 2 is detachably provided below the oil pan 1.
A trochoid type lubrication pump 4 is provided on a front wall 3 of a crankcase 8 of the engine E.

As shown in FIGS. 1 to 4, an oil return case 7 is vertically installed over the oil pan 1 and the increased oil pan 2, and the oil return case 7 is disposed on the front wall 3 of the engine E. I do. The oil return case 7 is configured such that the left and right sides thereof project in a mountain shape toward the oil pan 1 in a front view, and the central portion retreats to an upper position of the increasing oil pan 2. 2 oil return paths 6
6 are provided in parallel.

As shown in the vertical cross-sectional view of FIG. 2, the oil return path 6 is formed by bending the oil return case 7 into a substantially U-shape.
The oil pan 1 is communicated with an outlet 11 provided on the front face near the bottom wall 1a via a joint pipe 12 provided with an O-ring 12a. By using the joint pipe 12 with the O-ring 12a mounted in this way, even if there is a deviation in the vertical direction, the left-right direction, or the front-rear direction between the inlet 10 of the oil return path 6 and the outlet 11 of the oil pan 1, The oil return case 7 can be easily assembled without applying an excessive load.

As shown in FIG. 4, a rod-shaped oil strainer 1 is provided at the lower portion near the center in the left-right direction of the oil return case 7.
3 is screwed toward the oil pan 2, a suction passage 5 is provided in the oil return case 7, and the suction port 1 of the oil strainer 13 is inserted into the suction port 14 of the lubrication pump 4.
3a is communicated via the suction path 5. A suction passage 5 for the lubrication pump 4 is also provided in the oil pan 1 and the wall of the crankcase 8.

The lubricating oil in the increased oil pan 2 is sucked from the suction passage 5 through the oil strainer 13 by the operation of the lubricating pump 4, and is pressure-fed to various lubricating parts such as a crankshaft and a valve operating camshaft. The lubricating oil returned to the pan 1 is returned to the increased oil pan 2 from the oil return paths 6.6 distributed to the left and right of the oil return case 7.

The function of the lubricating device for the vertical engine with the increased oil pan according to the first embodiment will now be described. An oil return case 7 is erected over the oil pan 1 and the increase oil pan 2, and the oil return paths 6.6 are arranged in parallel in the oil return case 7 in the left and right directions. It becomes difficult for air to accumulate in the oil pan 2.
Further, since the return of the lubricating oil is distributed to the left and right oil return paths 6, the strength of the engine body may be locally reduced as compared with the above-described conventional technique in which one large-diameter oil return path 6 is provided. In addition, the strength can be kept high, and the inclination performance of the engine E in the left-right direction can be enhanced. Furthermore, since the suction passage 5 for the lubrication pump 4 is provided in the oil return case 7,
The man-hour for assembling the lubricating device is reduced, the lubricating device can be implemented at low cost, and the appearance is improved.

On the other hand, FIG. 5 shows a second embodiment of the present invention. Instead of providing the suction passage 5 of the lubrication pump 4 in the oil return case 7, an oil passage pipe 15 is connected between the oil pan 2 and the oil pan 1. It is arranged outside. That is, as shown in FIG.
Side suction path 5 and the oil strainer 13
Of the oil pan 1 through the oil pipe 15
Is connected to the suction path 5 of FIG.

FIG. 6 shows a third embodiment of the present invention, in which an oil return case 7 is extended so as to cover the lubrication pump 4, and a suction passage 5 for the lubrication pump 4 is formed in the return case 7. 1 and a suction passage 5 to be provided in the crankcase 8 (for example, see the first embodiment).

FIG. 7 shows a fourth embodiment of the present invention, in which the suction passage 5 of the lubrication pump 4 to be provided in the oil pan 1 and the crankcase 8 is replaced by an oil passage pipe 16 arranged outside the engine body. .

As described above, according to the present invention, the oil return case 7 extends over the oil pan 1 and the increased oil pan 2 below.
Since the lubrication pump 4 is vertically mounted on the same side as the lubrication pump 4, it is not limited to the vertical engine as in the first to fourth embodiments.
It can also be applied to horizontal engines with a cylinder bore oriented sideways.

[Brief description of the drawings]

FIG. 1 is a front view of a lubricating device for a vertical engine with an increasing oil pan, showing a first embodiment of the present invention.

FIG. 2 is a right side longitudinal sectional view of a main part around an oil return path of the lubrication device.

FIG. 3 is a plan view of a main part of the lubrication device.

FIG. 4 is a vertical sectional right side view of a main part around a suction passage of a lubrication pump of the lubrication device.

FIG. 5 is a diagram corresponding to FIG. 4 showing a second embodiment of the present invention.

FIG. 6A is a view corresponding to FIG. 1 showing a third embodiment of the present invention, and FIG. 6B is a longitudinal sectional view of a main part around a lubrication pump according to the third embodiment.

FIG. 7 is a diagram corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 8 is an equivalent view of FIG. 2 showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Oil pan, 2 ... Increasing oil pan, 3 ... One side wall of engine, 4 ... Lubrication pump, 5 ... Suction path of lubrication pump, 6 ... Oil return path, 7 ... Oil return case, E ... Engine.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F01M 11/00

Claims (2)

(57) [Claims] An oil pan (2) is provided below an oil pan (1) of an engine (E), and one side wall of the engine (E) is provided.
A lubrication pump (4) is provided in (3), and the oil pan (1) communicates with the increasing oil pan (2) through an oil return path (6).
(4) A lubricating device for an engine with an increased oil pan that communicates with an increased oil pan (1) through a suction path (5). Case (7) is installed and the oil return case
(7) is arranged on the one side wall (3) of the engine (E), and is divided into right and left in the oil return case (7) so that the two oil return paths (6) and (6) are arranged in parallel. A lubricating device for an engine with an increased oil pan, wherein the lubricating device is provided in the engine. 2. A lubrication pump in an oil return case (7).
The lubricating device for an engine with an increased oil pan according to claim 1, wherein the suction passage (5) of (4) is provided.