JP3044330B2 - Oil pan device for inclined mounted engine - Google Patents

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 a tilt-mounted engine.

[0002]

2. Description of the Related Art For example, in a vehicle for a working machine, there is a strong demand for lowering the overall height of an engine so as to improve a forward visibility. As an engine to meet such requirements, for example, FIG. 3
As shown in FIG. 2, a general engine E may be mounted on a vehicle for a working machine or the like while being inclined. 3, reference numeral 1 denotes a fuel injection pump, 2 denotes a fuel injector, 3 denotes an intake / exhaust valve, 4 denotes a rocker arm, 5 denotes a tappet, 6 denotes a piston, 7 denotes a large end of a connecting rod, 8 denotes a dynamo, and 9 denotes a dynamo. It is an oil gauge.

[0003]

As described above, when a general engine E is mounted on an inclined plane, the oil level of the lubricating oil interferes with the rotational path G of the large end 7 of the connecting rod as shown in the figure. becomes level L _0, the connecting rod big end 7 and counterweight stir the lubricating oil. For this reason, the output loss of the engine occurs, and the oil temperature of the lubricating oil rises, so that the oil deterioration becomes severe. In order to solve such inconveniences, it is conceivable to manufacture an oil pan device dedicated to the tilt-mounted engine, but this requires a new mold and increases the cost. The present invention has been made in view of such circumstances, and eliminates engine output loss and oil deterioration due to lubrication of the lubricating oil by the connecting rod large end portion 7 and the counterweight. the Upon lowering, to be able to practice at low cost by a simple modification, o in the blow-by gas
Ilmist is discharged from the breather device through the oil pan
To reduce the amount of oil leaking into the
When the engine is running after excessive oil supply to the engine,
Excessive amount of oil leaks out of the breather unit
The technical task is to prevent this.

[0004]

In order to solve the above-mentioned problems, a means adopted by the present invention is to mount an oil pan 17 on a lower side of a crankcase 11 of an engine E, In an oil pan device of an inclined mounting type engine configured to communicate with a chamber 18, a crank chamber 12 in the crankcase 11 and an oil pan 1
The oil chamber 18 in the chamber 7 is partitioned via a partition wall 13, a communication port 14 for communicating the crank chamber 12 and the oil chamber 18 is opened in the partition wall 13, and the communication port 14 is inclined. The lower part of the crank chamber 12 is opened at a position lower than the rotation trajectory G of the large end 7 of the connecting rod, and the crank in the inclined state is opened.
Sub oil tank 2 on the upper side wall 11a
1 and the sub-oil tank 21 is
And the upper wall of the sub oil tank 21
The gist is that a breather device 22 is provided in the apparatus .

[0005]

According to the present invention, the communication port is opened at a position lower than the rotation trajectory G of the large end 7 of the connecting rod at the lower portion of the crank chamber 12 in the inclined state, and operates as follows. When the engine is stopped, the oil levels in the crank chamber 12 and the oil pan oil chamber 18 are maintained at the same level L ₀ through the communication port 14. In the engine operating state, the blow-by gas filled in the crank chamber 12
The oil level in the crank chamber 12 is adjusted to the upper edge level L _{1 of the} communication port 14.
Press down. On the other hand, the oil surface of the oil pan oil chamber 18 is pushed up along with this at an upper level L ₂ than the oil surface L _0. At this time, the blow-by gas passes through the communication port 14, passes through the oil pan oil chamber 18,
The breather device 22 is reached.

[0006]

The present invention is configured as described above and has the following effects. In the operating state of the engine, the oil level in the crank chamber 12 is equal to the rotation trajectory G of the large end 7 of the connecting rod.
Since falls to the level L ₁ which does not interfere with, and solve the problem of stirs the lubricating oil by the connecting rod big end 7 and the counterweight or the like, it is possible to eliminate the output loss and oil degradation in the engine. Further, in the oil pan device 10, when the oil level of the lubricating oil in the crank chamber 12 is lowered, the oil chamber 1 in the crank chamber 12 and the oil pan 17 is reduced.
8 is divided by a partition wall 13, and the communication port 1 is connected to the partition wall 13.
It can be implemented inexpensively by a simple remodeling just by opening 4. The blow-by gas in the crank chamber 12 communicates with the
14 and an oil chamber 18 in an oil pan 17,
Rises inside the oil tank 21, and
Go out to. This blow-by gas is stored in the oil pan 17.
From leaving the oil chamber 18 to reaching the breather device 22
Then, only the air that rises in the sub oil tank 21
Oil mist mixed in the bigas is
As it is separated and removed extra while ascending in the ink 21 ,
The amount of oil mist flowing out from the breather device 22 is reduced.
As a result, oil consumption and environmental pollution can be suppressed.
When replenishing oil into the oil pan 17,
Oil may be replenished in excess of the
You. In this case, an excessive amount of oil
When overflow from the oil pan 17,
This sub oil is stored in the oil tank 21.
Oversupply of oil by the capacity of the oil tank 21
Prevents leakage from the breather device 22 to the outside
Can be

[0007]

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a longitudinal sectional front view of a tilt-mounted diesel engine according to the actual施例of the present invention. The basic configuration of the inclined mounted diesel engine E is the same as that of a general diesel engine, and reference numeral 1 in FIG. 1 denotes a fuel injection pump, 2 denotes a fuel injector, 3 denotes an intake / exhaust valve, 4 denotes a rocker arm, and 5 denotes a rocker arm. A tappet, 6 is a piston, 7 is a large end of a connecting rod, 8 is a dynamo, and 9 is an oil gauge.

[0008] Oil pan 10 of the inclined-mounted diesel engine E includes a crankcase 11, and comprises a oil pan 17 are assembled with bolts 15 on the lower side of the crankcase 11. The crank chamber 12 in the crank case 11 is connected to an oil pan 17 through a partition wall 13.
And is partitioned from an oil chamber 18 inside the partition.
A communication port 14 for communicating the crank chamber 12 with the oil chamber 18
Is open.

The communication port 14 is provided at the lower part of the crank chamber 12 in an inclined state, and the rotational path G of the large end 7 of the connecting rod is
It is opened at a lower position where it does not interfere with the operation, and operates as follows. That is, when the engine is stopped, the crankcase 1
2 and the oil level in the oil pan oil chamber 18 are maintained at the same level L ₀ through the communication port 14. Then, in the engine operating state, the blow-by gas filled in the crank chamber 12 pushes the oil level in the crank chamber 12 down to the upper edge level L ₁ of the communication port 14. On the other hand, the oil surface of the oil pan oil chamber 18 is pushed up along with this at an upper level L ₂ than the oil surface L _0. At this time, the blow-by gas passes through the communication port 14, passes through the oil pan oil chamber 18, and reaches the breather device 22.

According to the above-described oil pan device 10, the level L at which the oil level in the crank chamber 12 does not interfere with the rotation trajectory G of the large end 7 of the connecting rod in the operating state of the engine.
_Since it is reduced to _1, the problem of stirring the lubricating oil by the connecting rod 7 and the counterweight can be eliminated, and the output loss of the engine and oil deterioration can be eliminated. Further, in the oil pan device 10, when lowering the oil level of the lubricating oil in the crank chamber 12, the crank chamber 12 and the oil chamber 18 in the oil pan 17 are partitioned by a partition wall 13, and communicate with the partition wall 13. It can be implemented inexpensively by a simple modification that only opens the mouth 14.

Then, the crankcase 1 in an inclined state
A sub oil tank 21 is provided at the lowest position of the upper side wall 11a so as to communicate with the oil chamber 18 in the oil pan 17, and a breather device 22 is provided on the upper wall of the sub oil tank 21. The sub-oil tank 21 is to increase the upper limit of the auxiliary supply lubricating oil amount, or when supplemented with acceptable limits or of the lubricating oil, there is an advantage that can prevent blowout of the lubricating oil from the breather device 22.

The present invention is not limited to the above embodiment, and the shape of the crankcase and the oil pan is not limited.
It is not necessary to use multiple words that the present invention can be implemented with appropriate changes.

[Brief description of the drawings]

1 is a vertical sectional front view of the oil pan apparatus according to actual施例of the present invention.

FIG. 2 is a vertical sectional front view of an oil pan device according to a conventional example.
You.

[Explanation of symbols]

E: engine, 7: large end of connecting rod, G: rotation locus of large end, 11: crankcase, 11a: upper side
Wall: 12: Crank chamber, 13: Partition wall, 14: Communication port, 17: Oil pan, 18: Oil chamber in oil pan , 21: Sub oil tank, 22: Breather equipment
Place.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nobuhiro Yamamoto 64, Ishizukita-cho, Sakai-shi, Osaka, Japan, inside Kubota Sakai Plant (72) ) Inventor Masahiro Akita 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Works Co., Ltd. (56) References JP-A-58-200016 (JP, A) Actually open 1984-179214 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F01M 11/00

Claims (1)

(57) [Claims] An oil pan (17) is attached to a lower side of a crankcase (11) of an engine (E), and a crank chamber (12) and an oil chamber (18) of the oil pan (17) are communicated with each other. In the oil pan device of the inclined mounted engine, the crank chamber (12) in the crank case (11) and the oil chamber (18) in the oil pan (17) are partitioned via a partition wall (13). A communication port (14) for communicating the crank chamber (12) and the oil chamber (18) is opened in the partition wall (13), and the communication port (14) is located below the inclined crank chamber (12). The opening is formed at a position lower than the rotation trajectory (G) of the connecting rod large end (7), and is formed on the upper side wall (11a) of the crankcase (11) in an inclined state.
A sub oil tank (21) is provided.
1) communicates with the oil chamber (18) in the oil pan (17),
A breather device (22) on the upper wall of the tank (21).
An oil pan device for an inclined mounted engine.