JP2622777B2 - Lubricating device for engine 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 system for an engine of the type having an additional oil pan, which can simplify the structure and maintenance on the side of the additional oil pan.

[0002]

2. Description of the Related Art The basic structure of a lubricating device for an engine equipped with an increased oil pan, which is an object of the present invention, is a main body in which an oil pan 1 of an engine E is formed below the engine E as shown in FIG. The oil pan 1 is constituted by an oil pan 2 and an increasing oil pan 3 attached to the engine E. The oil pan 1 is communicated with each lubricating portion 13 through a discharge-side lubricating oil passage 8 of a lubrication pump 7 of a forced lubrication device 6. The lubricating oil is used to lubricate each lubricating portion 13 and to return to the oil pan 1.

As a prior art of this type, as shown in FIG. 3, a main body oil pan 2 and an increasing oil pan 3 of a diesel engine E are connected in series through a communication pipe 12, and the main body oil pan 2 and the increasing oil pan are connected. Oil supply ports 23 and 24 are provided separately from the pan 3, and the oil pan 3
The lubricating oil is pumped from the increasing oil pan 3 by the lubricating pump 7 and communicates with each lubricating unit 13 via the discharge-side lubricating oil passage 8 so that each lubricating unit 1 such as a crankshaft or a rocker arm can be used.
3 and the oil lubricating each lubricating part 13 is returned to the main body oil pan 2.

[0004]

In the above-mentioned prior art, the oil in the increased oil pan 3 is sent to the lubricating section 13 by the lubrication pump 7, so that the oil strainer 22 and the oil supply port 24 of the increased oil pan 3 are used. Need to be maintained. Further, since the oil supply ports 23 and 24 are provided in both the main body oil pan 2 and the increased oil pan 3,
The manufacturing cost increases as a whole lubrication device. The present invention
In addition to making maintenance on the oil pan side easier,
A technical problem is to simplify the structure of the entire lubricating device.

[0005]

Means for achieving the above object will be described below with reference to the drawings showing embodiments. That is, the present invention provides a lubricating device for an engine equipped with an increased oil pan having the basic structure, wherein a lubricating pump 7 is connected to the main body oil pan 2 and a discharge-side lubricating oil passage 8 of the lubricating pump 7 is provided.
Is connected to each lubricating unit 13 through the increasing oil pan 3,
The lubricating oil pumped from the main body oil pan 2 by the lubrication pump 7 is configured to be sent to each lubrication unit 13 via the increasing oil pan 3, and the main body oil pan 2 is connected to the increasing oil pan 3 by a communication path, The oil supply port 23 is formed only above the main body oil pan 2 among the main body oil pan 2 and the increased oil pan 3.

[0006]

The lubricating oil pumped from the main body oil pan 2 by the lubrication pump 7 is supplied to each lubrication unit 13 through the increasing oil pan 3.
In addition, since the oil supply port of the increased oil pan 3 is omitted, it is only necessary to maintain the oil strainer and the oil supply port 23 of the oil pan 2 on the engine E side. No maintenance required. Further, since the oil supply port 23 of the oil pan is limited to the main body oil pan 2 and the oil supply port 23 of the oil pan 3 is eliminated, the structure of the entire lubricating device is simplified.

[0007]

(1) The maintenance of the oil pan is sufficient only for the main body oil pan on the engine side, and the maintenance of the increased oil pan side becomes unnecessary, and the maintenance of the lubrication device becomes easy. (2) Since the oil supply port of the increased oil pan is eliminated, the structure of the entire lubricating device is simplified, and the manufacturing cost can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic system diagram of a lubricating device for an oil-cooled diesel engine according to a first embodiment. As shown in FIG. 1, a cooling fan is provided at a lower front portion of the overhead valve vertical diesel engine E.
(Not shown) is mounted on the crankshaft, the oil cooler 5 is arranged in front of the engine E so as to face the cooling fan, and the oil cooler 5 can be radiated by the cooling air of the cooling fan.

A sub-combustion chamber 15 is formed in the cylinder head 14 of the diesel engine E, an oil cooling chamber 4 is opened in the outer peripheral wall of the sub-combustion chamber 15, and oil is reciprocated between the cylinder 17 and the cylinder head 14 of the engine E. The paths 18 and 19 are opened, and the oil supply forward path 18 communicates with the oil supply return path 19 via the oil cooling chamber 4 and the oil cooler 5. As shown in FIG. 1, a discharge-side lubricating oil passage 8 of a lubricating pump 7 of a forced lubricating device 6 of a diesel engine E communicates with each lubricating portion 13, and a relief valve 10 is provided in the lubricating oil passage 8. The relief oil passage 11 communicates with the oil pan 1 of the engine E via the oil cooling chamber 4 and the oil cooler 5. The lubricating oil pumped by the lubricating pump 7 lubricates each lubricating portion 13 such as a crankshaft, a camshaft and a rocker arm through a lubricating oil passage 8, and the oil relieved from the relief valve 10 passes through the oil cooling chamber 4. Then, the heat is radiated by the oil cooler 5 and returned to the oil pan 1.

In this case, the oil pan 1 is connected to the engine E
A lubricating pump 7 disposed in the main body oil pan 2 and a lubricating oil passage 8 on the discharge side of the lubricating pump 7. The oil pan 3 is interposed, and the lubricating oil passage 8 on the downstream side of the increased oil pan 3 is branched into a supply passage 16 to the lubricating unit 13 and a relief oil passage 11. That is, the lubricating oil pressure-fed by the lubrication pump 7 from the main body oil pan 2 is once passed through the increasing oil pan 3, and the increased oil pan 3 is supplied to each lubricating unit 13 as a so-called relay base.
Excess oil relieved from the relief valve 10 is sent to the oil cooling chamber 4 from the oil feed path 18, and the sub-combustion chamber 4, which tends to be particularly hot in the diesel engine E, is effectively cooled and radiated by the oil cooler 5. Then, the oil is returned to the main body oil pan 2 via the oil supply return path 19. The main body oil pan 2
Is connected to the oil pan 3 via the connecting pipe 12.
The oil supply port 23 is formed only above the main body oil pan 2 of the main body oil pan 2 and the increased oil pan 3.

The function of the first embodiment will be described. Before operating the engine E, the on-off valve 20 is opened to supply oil. That is, oil is supplied from the oil supply port 23 to the main body oil pan 2, and the main body oil pan 2 is filled with oil, and at the same time, oil is also supplied to the increased oil pan 3 via the communication pipe 12. Next, the on-off valve 20 is closed, the communication between the main body oil pan 2 and the increasing oil pan 3 is cut off, and the engine E is operated.

In the first embodiment, the oil supply port 23 is formed only on the main body side of the engine E, and the oil supply port of the increased oil pan 3 can be omitted as compared with the prior art described above. It is only necessary to maintain the oil strainer and the oil supply port 23 of the pan 2, and the maintenance of the lubricating device can be facilitated by eliminating the need for maintenance on the increased oil pan 3 side. Further, since the oil supply port 23 of the oil pan 1 is limited to the main body oil pan 2 and the oil supply port 23 of the oil pan 3 is eliminated, the structure of the entire lubricating device is simplified, and the manufacturing cost can be reduced.

Further, in the first embodiment, since the on-off valve 20 is closed during the operation of the engine E, the oil level of the oil pan 3 is made independent from the oil level of the main oil pan 2 so that the oil pan 3, the capacity of the increased oil pan 3 can be freely increased in accordance with the capacity of the engine E. For example, when the increased oil pan 3 is formed to be vertically long and flat in accordance with the vertical width of the engine E, the overall width of the engine E can be suppressed, the horizontal width of the increased oil pan is increased, and the vertical width of the main body oil pan 2 is reduced accordingly. Then, the vertical width of the engine E can be suppressed.

FIG. 2 shows a second embodiment of the present invention, in which the oil intake 25 of the increased oil pan 3 is opened on the lower surface of the float 26, and the oil passage outlet 27 of the float 26 connects the increased oil pan 3 to the engine body. The lubricating oil passage 8 a is connected to the lubricating oil passage 8 a by a long rubber tube 28 so that the oil intake port 25 always faces the oil surface of the increased oil pan 3. By the way, the on-off valve 20 of the connecting pipe 12 is opened,
Even if the oil is transferred from the oil pan 3 to the main body oil pan 2, if the oil intake 25 is fixed at a high position of the oil pan 3, the oil level rises to the height of the intake 25 with the operation of the engine E. Lubricating oil is continuously supplied from the main body oil pan 2 to the increased oil pan 3 until
Although the oil level of the main body oil pan 2 may be lowered and the volume of the increased oil pan 3 may not be fully utilized, in the second embodiment, the intake port 25 is always at the oil level, so that the above problem can be solved. , Eliminating the risk of inhaling air.

Since the present invention is directed to a lubricating oil supply or storage mechanism of the forced lubrication device 6, the first embodiment is described.
The presence or absence of an oil cooling system including the oil cooler 5 as described above does not matter. Further, in the present invention, the communication path 12 that connects the main body oil pan 2 to the increased oil pan 3 is a constituent requirement, however, whether or not the on-off valve 20 is interposed in the communication path 12 is irrelevant. Further, the present invention can be applied not only to a diesel engine but also to a spark ignition engine.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram of a lubricating device for an oil-cooled diesel engine according to a first embodiment.

FIG. 2 is a schematic diagram of a main part of a lubricating device for a diesel engine according to a second embodiment.

FIG. 3 is an equivalent view of FIG. 1 showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil pan 2 Main body oil pan 3 Increasing oil pan 6 Forced lubrication device 7 Lubrication pump 8 Discharge side lubrication oil passage 12 Communication passage 13 Each lubrication part 23 Oil supply port E Engine

Claims (1)

(57) [Claims] 1. A main body oil pan (2) having an oil pan (1) of an engine (E) formed at a lower portion of the engine (E) and an engine.
(E), and an oil pan (3) attached to the lubrication unit (6). The oil pan (1) is connected to each lubrication unit (8) by a discharge-side lubrication oil passage (8) of a lubrication pump (7) of a forced lubrication device (6). 13), the lubricating device for an engine equipped with an increased oil pan configured to lubricate each lubricating portion (13) with lubricating oil of the oil pan (1) and to return to the oil pan (1). A lubrication pump (7) communicates with the oil pan (2), and a discharge-side lubrication oil passage (8) of the lubrication pump (7) communicates with each lubrication section (13) through an increasing oil pan (3). Lubricating oil pumped from the main body oil pan (2) by the lubrication pump (7) to increase the oil pan (3)
And the oil pan (2) is connected to the oil pan (3).
Communicate with (12), oil pan (2) and oil pan
(3) A lubricating device for an engine equipped with an increased oil pan, wherein an oil supply port (23) is formed only above the main body oil pan (2).