TWI610020B - Engine oil shell construction - Google Patents

Description

Engine oil shell construction

The present invention relates to an oil shell having a dual configuration of an inner oil shell and an outer oil shell.

The oil casing which is disposed in the lower part of the engine to store lubricating oil is known as an oil casing which is provided with an inner oil casing in the outer oil casing to constitute a double structure.

In the engine having the oil casing of the double structure, a first storage chamber capable of storing lubricating oil in the inner oil casing and a second storage capable of storing lubricating oil between the inner oil shell and the outer oil shell are formed Leave room. In addition, the lubricating oil is sucked from the first storage chamber through the filter to be supplied to the engine, and the portion to be lubricated is returned to the first storage chamber to circulate, and the first storage chamber and the first storage chamber are configured. 2 The storage chamber is connected through a temperature control valve. Further, when the temperature is low during warm-up operation, the temperature control valve is turned off, and only the lubricating oil in the first storage chamber is circulated, so that the temperature of the lubricating oil rises rapidly, and at the time of high temperature, the temperature control valve is opened. In the first storage chamber, the first storage chamber is connected to the second storage chamber, and the amount of the lubricating oil that can be circulated is increased to prevent an excessive increase in the temperature of the lubricating oil (see JP-A-2006-207521 (hereinafter, Patent Document 1) )).

Further, a leak hole is provided at the bottom of the oil case, and the leak hole is used to extract the lubricating oil from the oil case when the lubricating oil is replaced, and the leak hole is closed by the leak plug. Moreover, as described above, in the double-structured oil shell, when When the oil is drained inside the oil casing, it is required to discharge not only the oil in the outer oil casing but also the oil in the inner oil casing (the first storage chamber).

Here, for example, in Patent Document 1, a small-diameter leakage hole is provided in the bottom wall of the inner oil casing.

Further, in addition, it is also conceivable that a leakage hole is coaxially provided in the inner oil shell and the outer oil shell, and the leakage plug is constituted by an inner plug and an outer plug, and the inner plug closes a leak hole of the oil shell in the inner plug, and the outer plug The head system occludes the leakage hole of the outer oil shell, and when the oil is drained, the inner plug and the outer plug are removed, so that the lubricating oil can be discharged from both the inner oil shell and the outer oil shell.

However, as shown in the above Patent Document 1, the leak hole is simply provided in the inner oil shell, and the lubricating oil often flows between the inner oil shell and the outer oil shell, and hinders the lubrication in the inner oil shell during warm-up operation. The problem of oil heating.

Further, as described above, when the leakage plug is constituted by the inner plug and the outer plug, the configuration of the leakage plug is complicated, which causes an increase in cost, and at the same time, the leakage plug is removed, and in particular, the inner plug is removed. It is very difficult. When draining oil, there are problems that lead to an increase in working hours.

Here, the object of the present invention is to provide an engine which is easy to drain from the oil casing with a simple structure and which suppresses the heat transfer between the inner and outer oil casings during warm-up operation. Oil shell construction.

In order to achieve the above object, according to the present invention, an oil-shell structure of an engine is provided, and an inner oil shell is provided on a bottom wall of the outer oil shell to constitute an oil shell, and the first storage of lubricating oil is stored in the inner oil shell. Retaining a room, and having a second storage chamber between the outer oil shell and the inner oil shell, retaining lubricating oil, having a restriction mechanism, limiting the machine When the lubricating oil does not reach a predetermined temperature, the circulation of the lubricating oil between the first storage chamber and the second storage chamber is restricted, and the circulation path of the lubricating oil is provided, and the circulation path is inhaled and stored in the first storage chamber. Or lubricating oil of one of the second storage chambers, supplied to the lubricating space of the engine, and returned to the storage chamber of the foregoing one, characterized in that: the bottom wall of the outer oil shell and the bottom wall of the inner oil shell Between the openings having openings with respect to the second storage chamber, a gap is partially provided, and a communication hole is formed in the bottom wall of the oil casing facing the gap, and the opening portion, the gap, and the communication hole are formed. There is a communication path connecting the first storage chamber and the second storage chamber, and the second storage chamber faces the outer oil casing and has a leakage hole through which the lubricating oil in the second storage chamber can be discharged.

Moreover, the gap of the communication path may be formed as a protrusion protruding from the bottom wall of the outer oil shell to the bottom wall of the inner oil shell, and surrounded by the bottom wall of the outer oil shell. Into the space.

Further, the suction port of the lubricating oil in the first storage chamber may be sucked into the inner oil casing, and the suction port and the communication hole may be arranged to be spaced apart from each other in the horizontal direction.

Further, the inner oil casing may be provided with an insertion hole penetrating through the first storage chamber and the second storage chamber, and the restriction mechanism may open and close the opening and closing mechanism of the insertion hole, and the protruding portion may be formed between the opening and closing mechanism and the suction port.

Further, the leakage hole may be provided at a lower portion of the side wall of the outer oil casing, and the communication hole may be located below the leakage hole.

According to an aspect of the present invention, a gap is partially provided between the bottom wall of the outer oil casing and the bottom wall of the inner oil casing to provide a communication path connecting the first storage chamber and the second storage chamber. The lubricating oil discharged from the second storage chamber is discharged from the leak hole provided in the outer oil casing, and can be discharged through the communication path to the first storage chamber. The lubricating oil can easily leak out all the oil in the oil casing.

Further, the communication path between the first storage chamber and the second storage chamber is not simply a hole in the inner oil shell, but a gap is locally provided between the bottom wall of the outer oil shell and the bottom wall of the inner oil shell. Since the separation position is in communication with the first storage chamber and the second storage chamber, the lubricating oil is hard to flow between the first storage chamber and the second storage chamber. Thereby, when the lubricating oil is not full of the predetermined temperature, the flow of the lubricating oil is restricted by the restriction mechanism between the first storage chamber and the second storage chamber, and between the first storage chamber and the second storage chamber The heat movement is suppressed by a simple composition. Therefore, it is possible to suppress a decrease in the temperature of the lubricating oil which is circulated and stored in one of the first or second storage chambers when the lubricating oil is not at a predetermined temperature.

When in accordance with an aspect of the present invention, the gap of the communication path is formed as a projection on the bottom wall of the inner oil shell, protruding from the bottom wall of the outer oil shell, and the outer oil The space enclosed by the bottom wall of the shell, so that it is easy to set a gap between the bottom wall of the outer oil shell and the bottom wall of the inner oil shell without changing the shape of the outer oil shell or increasing the number of parts, thereby forming a communication path.

According to an aspect of the present invention, the suction port of the lubricating oil sucked into the first storage chamber is provided in the inner oil casing, and the suction port and the communication hole are arranged to be spaced apart from each other in the horizontal direction, so that the communication is transmitted through The situation in which the path is sucked into the lubricating oil in the second storage chamber is suppressed. Therefore, when the lubricating oil is not at a predetermined temperature, the flow of the lubricating oil between the first storage chamber and the second storage chamber is restricted by the restriction mechanism, and the temperature of the lubricating oil sucked from the suction port can be more reliably suppressed. .

According to an aspect of the present invention, the protruding portion is formed between the opening and closing mechanism for opening and closing the insertion hole provided in the inner oil casing, and the suction port, so When the lubricating oil reaches a predetermined temperature or higher and the insertion hole is opened, when the lubricating oil between the first storage chamber and the second storage chamber can flow, the low-temperature lubricating oil that flows from the second storage chamber to the first storage chamber It is difficult to inhale from the inhalation port. That is, since the lubricating oil flowing in from the insertion hole is temporarily stagnated before the protruding portion, the lubricating performance due to the inhalation of the low-temperature lubricating oil from the suction port can be suppressed from being lowered.

1‧‧‧ engine

3‧‧‧ oil shell

4‧‧‧ outer oil shell

5‧‧‧ inner oil shell

6‧‧‧1st Reserving Room

7‧‧‧2nd Reserving Room

13‧‧‧Inhalation

14‧‧‧Insert hole

15‧‧‧temperature control valve

20‧‧‧ leak hole

23‧‧‧ gap

24‧‧‧ openings

25‧‧‧Connected holes

26‧‧‧Connected path

Fig. 1 is a longitudinal sectional view showing a schematic structure of an engine of the embodiment using the oil-shell structure of the present invention.

Fig. 2 is a plan view showing the structure of the oil casing of the embodiment.

Fig. 3 is a cross-sectional view showing the structure of the oil casing of the embodiment.

Fig. 4 is a plan view showing the positional relationship between the communication hole of the oil casing and the filter and the temperature control valve in the present embodiment.

Hereinafter, the present invention will be described based on the embodiments shown in Figs. 1 to 4 . Fig. 1 is a longitudinal sectional view showing a schematic structure of an engine of the embodiment using the oil-shell structure of the present invention. In the lower portion of the cylinder block 2 of the engine 1 of the present embodiment, an oil casing 3 for storing lubricating oil is provided.

The oil shell 3 is an oil shell 3 having a double structure composed of an oil shell 4 and an inner oil shell 5 which are slightly rectangular in the upper portion.

The inner oil casing 5 is smaller than the outer oil casing 4, and is disposed in the outer oil casing 4, and has a first storage chamber 6 in which lubricating oil can be stored.

The bottom of the inner oil casing 5 is placed on the bottom wall 4a of the outer oil casing 4, and is partially connected. The inner oil shell 5 is at the lower part and the middle part of the up-and-down direction, which is more than the outer oil shell 4 The side is smaller, the upper portion is wider and roughly the same size as the outer oil shell 4. Thereby, a second storage chamber 7 capable of storing lubricating oil is provided between the outer oil casing 4 and the inner oil casing 5.

Inside the inner oil casing 5, a filter 10 for sucking in lubricating oil is provided. The filter 10 is connected to the oil pump 11 provided in the cylinder block 2 through the pipe 12. The lubricating oil in the inner oil casing 5 is supplied to the lubricating parts of the moving valve device or the like in the engine 1 by the oil pump 11 that is operated by the operation of the engine 1, and after lubricating the lubricating portion, it is returned to the lubricating portion. Inner oil shell 5.

The suction port 13 of the filter 10 is disposed close to the bottom wall 5a of the inner oil casing 5 so that the lubricating oil is sucked when the lubricating oil storage amount in the inner oil casing 5 is lowered.

Further, in the front-rear direction central portion of one side wall 5b extending in the front-rear direction of the inner oil casing 5, an insertion hole 14 that connects the first storage chamber 6 and the second storage chamber 7 is provided, and the insertion hole is opened and closed. 14 temperature control valve 15 (restriction mechanism, opening and closing mechanism).

The temperature control valve 15 is opened and closed in accordance with the temperature of the lubricating oil stored in the first storage chamber 6. When specified, the temperature control valve 15 is set such that when the temperature of the lubricating oil is lower than a predetermined temperature (for example, 80 ° C), that is, when the engine 1 is in a warm state, it is closed, when compared to a predetermined temperature. When you are still high, start working.

Fig. 2 is a plan view showing the structure of the oil can 3 of the embodiment. Fig. 3 is a transverse sectional view showing the structure of the oil can 3 of the embodiment.

As shown in FIGS. 2 and 3, a lower portion of the side wall 4b of the outer oil casing 4 is provided with a leakage hole 20 that communicates with the second storage chamber 7 in the outer oil casing 4 and the outside, and is provided with a clogging hole. 20 leakage plug 21 .

Further, in the present embodiment, the bottom wall 5a of the inner oil casing 5 is formed into a T The projection 22 protrudes upward from the glyph. The protruding portion 22 has a width of about 1 cm and a protruding height coefficient of about mm. Further, the bottom wall 5a of the inner oil casing 5 and the bottom wall 4a of the outer oil casing 4 are in contact with portions other than the protruding portion 22, and are joined by spot welding or the like. Thereby, in the protruding portion 22, a T-shaped gap 23 is formed between the bottom wall 5a of the inner oil casing 5 and the bottom wall 4a of the outer oil casing 4.

The protruding portion 22 formed on the bottom wall 5a of the inner oil case 5 has a portion 22a and a portion 22b. The portion 22a has a central portion in the left-right direction of the inner oil case 5, and is substantially parallel to the side wall 5b on which the temperature control valve 15 is disposed. The ground extends in the front-rear direction, and the portion 22b extends in the direction of separation (right side in the drawing) from the central portion of the portion 22a with respect to the temperature control valve 15.

The end portion of each of the portions 22a and 22b of the protruding portion 22 faces the second storage chamber and is provided with an opening portion 24.

Further, in the upper surface near the end portion of the portion 22b extending from the direction in which the temperature control valve 15 of the projecting portion 22 is separated, the gap 23 in the communication projecting portion 22 is provided to communicate with the first storage chamber 6 and has a diameter of about 7 mm. Hole 25. The upper and lower positions of the communication hole 25 are located below the lower end position of the leakage hole 20 provided at the lower portion of the side wall 4b of the outer oil casing 4.

Therefore, the first storage chamber 6 and the second storage chamber 7 communicate with each other through the communication path 26 including the gap 23, the opening portion 24, and the communication hole 25, and the lubricating oil can pass through the communication path from the first storage chamber 6. 26 to flow into the second storage chamber 7.

Fig. 4 is a plan view showing the positional relationship between the communication hole 25 of the oil case 5, the filter 10, and the temperature control valve 15 in the present embodiment.

As shown in Fig. 4, the suction port 13 of the filter 10 is separated from the communication hole 25 in the left-right direction, and the communication hole 25 is provided in the T-shaped projection. The portion 22a extending in the front-rear direction of the portion 22 is near the end portion of the portion 22b extending to the right in the drawing. Further, the suction port 13 is located at a position farther than the portion 22a extending in the front-rear direction, and is also shifted to the right in the drawing, and the temperature control valve 15 for opening and closing the insertion hole 14 is located at a portion 22a extending in the front-rear direction. The position on the left side of the graph is biased. That is, the communication hole 25 sandwiches the suction port 13 so as to be located on the opposite side of the insertion hole 14.

According to this configuration, in the present embodiment, since the temperature control valve 15 is in the closed state during the warm-up operation, the lubricating oil of the engine 1 is used only by the lubricating oil in the first storage chamber 6. Therefore, the lubricating oil is circulated with a relatively small amount, so that the lubricating oil can be rapidly heated to ensure the lubricating performance.

Further, when the oil draining operation of discharging the lubricating oil from the oil casing 3 is performed, it is only necessary to remove the leak plug 21 which is locked to the outer oil casing 4.

By removing the leak plug 21, the lubricating oil in the second storage chamber 7 between the inner oil casing 5 and the outer oil casing 4 is discharged. Further, since the first storage chamber 6 and the second storage chamber 7 communicate with each other through the lower transmission communication path 26, when the lubricating oil in the second storage chamber 7 is discharged, the lubrication in the first storage chamber 6 is performed. The oil is also discharged. Thereby, the lubricating oil can be discharged from the first storage chamber 6 and the second storage chamber 7 by removing the leakage plug 21 that is locked to the outer oil casing 4.

Further, since the gap 23 constituting the communication path 26 that connects the first storage chamber 6 and the second storage chamber 7 is formed in a T shape, it is complicated as compared with the case where the inner oil shell 5 is simply provided with a hole. Further, the cross-sectional area of the flow path is relatively thin, and it is a shape in which the lubricating oil is hard to circulate between the first storage chamber 6 and the second storage chamber 7. Therefore, it is difficult to thermally move between the lubricating oil in the first storage chamber 6 and the lubricating oil in the second storage chamber 7, and when the engine 1 is running, In particular, when the temperature control valve 15 is in the closed state, the temperature of the lubricating oil in the first storage chamber 6 can be suppressed from decreasing.

In this manner, in the present embodiment, the bottom wall 5a of the inner oil case 5 has a T-shaped protruding shape, whereby the gap 23 is easily provided between the inner oil case 5 and the outer oil case 4, and A communication path 26 is formed. Further, the leakage plug 21 for blocking the leakage hole 20 for discharging the lubricating oil can be provided only to the outer oil case 4, so that it can be made into a simple structure, and has a double structure of the inner oil case 5 and the outer oil case 4. In the oil tank 1, the draining operation of discharging the lubricating oil becomes easy. Further, since the protruding height of the protruding portion 22 is made lower than the lower end of the leak hole 20, the amount of lubricating oil remaining inside the inner oil case 5 can be made less during the draining operation.

Further, the communication hole 25 of the communication gap 23 and the first storage chamber 6 is provided in the vicinity of the end portion of the portion 22b extending in the direction in which the protrusion portion is separated from the temperature control valve 15, and is disposed in the inner oil case. On the right side of the bottom wall 5a of the fifth portion, the suction port 13 of the filter 10 is located closer to the communication hole 25 than to the portion 22a extending in the front-rear direction of the protruding portion 22, and the communication hole 25 and the suction port 13 are separated from each other. Therefore, it is difficult to suck the lubricating oil in the second storage chamber 7 from the suction port 13 of the filter 10 through the communication path 26. As a result, when the temperature control valve 15 is in the closed state at a low temperature during the warm-up operation, the low-temperature lubricating oil in the second storage chamber 7 can be prevented from being sucked, and the lubricating oil can be rapidly heated.

Further, the suction port 13 of the filter 10 is located to the right of the portion 22a extending in the front-rear direction of the protruding portion 22, and the temperature control valve 15 is disposed in the front-rear direction of the protruding portion 22. Since the extended portion 22a is still on the left side, when the temperature control valve 15 is opened immediately after the warm-up operation, for example, the lubricating oil stored in the second storage chamber 7 is hard to be immediately Suck The inlet 13 is inhaled. At this time, the low-temperature lubricating oil that has flowed into the first storage chamber 6 through the insertion hole 14 is temporarily stagnated before the protruding portion 22, and is mixed with the relatively high-temperature lubricating oil in the first storage chamber 6, and then sucked in. The mouth 13 is sucked in, so that the lubricating performance can be sufficiently ensured. Further, even if the temperature control valve 15 is not sufficiently closed at a low temperature due to a failure or the like, it is possible to suppress the lubricating oil in the second storage chamber 7 which is likely to be lower than the inside of the first storage chamber 6 by suction, thereby ensuring the lubrication. Lubrication performance.

Further, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the invention. For example, the shape of the protruding portion 22 may be a shape other than the T-shape, and the lubricating oil that circulates in the communication path 26 is very complicated as long as the communication path 26 that connects the first storage chamber 6 and the second storage chamber 7 is complicated. It is difficult to circulate the shape. The invention can be widely applied to an oil casing of a double-structured engine composed of an inner oil shell and an outer oil shell.

3‧‧‧ oil shell

4‧‧‧ outer oil shell

5‧‧‧ inner oil shell

14‧‧‧Insert hole

15‧‧‧temperature control valve

20‧‧‧ leak hole

21‧‧‧Leaked plug

22‧‧‧Protruding

22a‧‧‧ parts

22b‧‧‧ parts

23‧‧‧ gap

24‧‧‧ openings

25‧‧‧Connected holes

26‧‧‧Connected path

Claims (4)

An oil-shell structure of an engine, comprising an inner oil shell on a bottom wall of the outer oil shell to constitute an oil shell, having a first storage chamber for storing lubricating oil in the inner oil shell, and having the outer oil shell and the foregoing The second storage chamber storing the lubricating oil between the inner oil casings has a restriction mechanism, and the restriction mechanism is restricted between the first storage chamber and the second storage chamber when the lubricating oil does not reach a predetermined temperature The circulation of the lubricating oil includes a circulation path of the lubricating oil, and the circulation path sucks the lubricating oil stored in a storage chamber of one of the first storage chamber or the second storage chamber, and supplies the lubricant Returning to the lubricating compartment of the engine, and returning to the storage compartment of the foregoing one, characterized in that between the bottom wall of the outer oil casing and the bottom wall of the inner oil casing, there is a second storage chamber The opening of the opening is partially provided with a gap, and a communication hole is formed in a bottom wall of the inner oil casing facing the gap, and the first storage is formed by the opening, the gap, and the communication hole. Communication path between the retention chamber and the aforementioned second storage chamber Facing the second storage chamber, the leakage hole having a lubricating oil that can be discharged from the second storage chamber on the outer oil casing; the gap of the communication path is formed to be in the inner oil casing The bottom wall partially protrudes from a protruding portion protruding from a bottom wall of the outer oil casing and a space surrounded by a bottom wall of the outer oil casing. The oil-shell structure of the engine according to the first aspect of the invention, wherein the suction port of the lubricating oil sucked into the first storage chamber is provided in the inner oil In the casing, the suction port and the communication hole are arranged to be spaced apart from each other in the horizontal direction. The oil-shell structure of the engine according to the second aspect of the invention, wherein the inner oil casing is provided with an insertion hole penetrating the first storage chamber and the second storage chamber, and the restriction mechanism opens and closes the insertion hole In the opening and closing mechanism, the protruding portion is formed between the opening and closing mechanism and the suction port. The oil-shell structure of the engine according to any one of claims 1 to 3, wherein the leak hole is provided in a lower portion of the side wall of the outer oil casing, and the communication hole is located below the leak hole. position.