JPH11218015A - Lubricating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the oil temperature to be fast increased, and enable the oil shortage not to occur after the temperature rises, in a lubricating device for internal combustion engines. SOLUTION: An oil pan 2 is divided into the first sump 2a into which recovered oil flows, and the second sump 2b which is connected to the first bath by connecting holes 211, and the quantity of circulating oil is reduced at the time of low temperatures. With a suction part 3 connected to an oil suction pump 5 through a suction pipe 4, a moving part 34 is structured to be held in a housing 31 so that it can freely advance and retract. Then, as the oil temperature rises, the moving part 34 is advanced to the second sump 2b side in order for the oil accumulated in the second sump 2b to be directly sucked from a suction opening 344. Thus, oil cannot be accumulated in any of both the sumps 2a, 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lubrication device for an internal combustion engine.

[0002]

2. Description of the Related Art A lubricating device for an internal combustion engine is provided for the purpose of reducing sliding friction of various parts of the internal combustion engine such as a cylinder wall surface and the like. Lubricating oil stored in an oil pan provided at a lower portion of the internal combustion engine is used. Oil) is injected into each part of the internal combustion engine by a pump, and the oil is collected again in an oil pan. The temperature of the oil rises due to the heat generated by the engine during the warm-up operation, the viscosity of the oil decreases, the load on the pump decreases, and a good lubrication effect is exhibited while circulating between the oil pan and the lubrication parts. . Therefore, it is desirable that the oil temperature rise in a short time.

[0003] A technique for increasing the oil temperature increasing speed is disclosed in US Patent No. 5,301,642. this is,
The oil pan is divided into a first tank in which the collected lubricating oil is collected, and a second tank communicating with the tank through a communication hole,
An oil strainer connected to the pump via a suction pipe is immersed in the first tank. The diameter of the communication hole is reduced to some extent so that the flow of oil between the two tanks in the communication hole is suppressed at a low temperature of the oil having a high oil viscosity. With this configuration, the oil collected in the first tank is sucked up again by the pump in a state where the oil in the second tank is not mixed so much with the oil in the second tank. Reduce the oil temperature faster.

[0004]

However, according to the technique of the above-mentioned US Pat. No. 5,301,642, the circulation path after the oil temperature rises is such that the recovered oil flowing into the first tank passes through the second tank. Thus, a bypass is formed to flow into the first tank in which the oil strainer is immersed, so that the oil strainer passes through the communication hole twice to pass through the second tank. For this reason, oil tends to stay in the second tank, and the oil stored in the second tank does not sufficiently contribute to circulation, and may cause an oil shortage depending on the operation state of the internal combustion engine, such as at high speed rotation. .
Further, when the viscosity of the lubricating oil is high, such as during extremely cold weather, the lubricating oil returns poorly, and the oil level in the first tank decreases, leading to a shortage of oil.

[0005] Further, since all the recovered oil flows into the first tank, which is only a part of the oil pan, there is a problem that air is easily mixed into the oil sucked into the oil strainer.

The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a lubricating device that can increase the oil temperature at a high speed, can circulate a sufficient amount of oil after the oil temperature has increased, and can also reduce the inflow of air into the intake oil.

[0007]

According to the first aspect of the present invention, an oil pan in which oil is stored in a lower part of the internal combustion engine is formed by a first tank with a partition wall and a communication hole formed in the partition wall with the first pan. The tank is divided into a second tank that communicates with the tank. Oil is recovered from each part of the internal combustion engine into which the oil is injected into the first tank. A suction part connected to the pump via a suction pipe is disposed so as to straddle both tanks, and the ratio of the opening area of the suction port on the first tank side to the opening area on the second tank side is determined. It is configured to be adjustable. Further, there is provided a suction port adjusting means for increasing the opening area of the suction port on the second tank side as the temperature of the lubricating oil sucked up from the suction port increases.

At a low temperature, it is sucked from the first tank side. Since the oil temperature is low, the viscosity of the oil is high, and the flow of oil between the two tanks is suppressed. Therefore, the oil stored in the second tank hardly contributes to the circulation between each part of the internal combustion engine and the oil pan, and the amount of the circulating oil is small. The heat generated by the engine causes the oil temperature to rise quickly. When the oil temperature rises, the opening area of the suction port on the second tank side increases,
The suction portion directly sucks the oil in the second tank, and a large amount of oil including the oil stored in the second tank performs a smooth circulation, thereby preventing shortage of the oil.

Further, as the oil temperature rises, the opening area of the suction port on the side of the second tank where the collected oil does not flow directly increases, so that the amount of air mixed into the suction oil can be reduced.

According to the second aspect of the present invention, the suction portion is formed by a cylindrical movable portion penetrating the partition wall, and the movable portion is connected to the first tank side and the second tank side. And a housing configured to be able to move forward and backward, and the suction port is formed in a side wall of the movable portion. The above-mentioned suction port adjusting means,
The movable portion is driven to advance to the second tank side as the temperature of the oil sucked from the suction port rises.

As the oil temperature rises, the movable portion moves to the second tank side by the suction port adjusting means, so that the opening area of the suction port on the first tank side decreases and the opening of the second tank side increases. The area increases.

According to the third aspect of the present invention, the suction portion has a first suction port formed on the first tank side, a second suction port formed on the second tank side, and a suction port formed on each suction port. Is provided with a valve for opening and closing the valve. The suction port adjusting means is configured to drive the valve of the first suction port to close and to open the valve of the second suction port as the temperature of the oil sucked up from the suction port rises.

As the oil temperature rises, the first inlet is closed and the second inlet is opened by the inlet adjusting means.
The opening area on the first tank side decreases and the opening area on the second tank side increases.

According to the fourth aspect of the present invention, by providing the partition wall horizontally and forming the first tank above the second tank, light air does not enter the second tank more. You can do so. The warm lubricating oil is light,
There is less circulation between the cold (and thus heavy) second tank lubricant.

According to a fifth aspect of the present invention, the suction portion is provided so as to penetrate the partition wall, and a tip end of the suction pipe is provided so that the suction portion has a first tank side and a second tank from above. It is configured to be able to move forward and backward to the side.

Normally, a suction negative pressure of a pump acts on the suction portion. If the oil temperature is extremely low,
If the oil level drops and the suction port of the suction unit is exposed from the oil surface, such as when the engine rotates at high speed before the oil temperature rises sufficiently, the suction negative pressure decreases and the suction unit descends due to its own weight. Thus, air is prevented from entering along with the oil from the suction port.

[0017]

(First Embodiment) FIG. 1 shows an internal combustion engine to which a lubricating device according to the present invention is applied. Fig. 1
As shown in FIG. 1A, an oil pan 2 is provided below the engine block 1 and oil is stored in the oil pan 2. An oil strainer 3 serving as a suction part is immersed in the oil stored in the oil pan 2, and the oil strainer 3 is connected to an oil pump 5 via a suction pipe 4. The pump 5 is operated by the power of the engine, sucks up the oil from the oil strainer 3 through the suction pipe 4, and sends the oil to the oil passage 7 through the filter 6 for removing foreign substances in the oil. The delivered oil is injected from the oil passage 7 into various parts of the internal combustion engine, such as the cylinder wall surface and the valve operating mechanism.
The injected oil is collected by dropping into the oil pan 2 along the wall of the oil pan 2 or directly.

The oil pan 2 is provided with a horizontal partition wall 21 which divides the oil pan 2 into an upper first tank 2a into which recovered oil flows and a lower second tank 2b.
A plurality of communication holes 211 are formed in the partition wall 21 to connect the two tanks 2a and 2b.

FIG. 1B shows a connection state between the oil strainer 3 and the suction pipe 4. The distal end portion 41 of the suction pipe 4 is enlarged in diameter, and the upper part of the circular oil strainer 3 is fitted therein, and the suction pipe 4 holds the oil strainer 3 vertically movably. An opening 212 is formed in the partition wall 21 at the position where the oil strainer 3 is provided, and the oil strainer 3 penetrates through the partition wall 21 and protrudes into the second tank 2b.

FIG. 2 shows the disassembled oil strainer 3. 1B and 2, an oil strainer 3 is a cylindrical housing 3 held at a distal end portion 41 of a suction pipe 4.
1 and a disc 32 having substantially the same diameter as this, and are connected by a plurality of (four in the example in the figure) spacers 33 erected at equal intervals around the periphery of the disc 32. A through hole 311 for oil distribution is formed in the upper wall of the housing 31.

In a space formed by the housing 31 and the disk 32, a movable tube 34 as a movable portion is provided coaxially with the housing 31. The movable tube 34 is configured by integrally connecting a cylindrical body 341, an intake net 342, and a cover plate 343. The cylindrical body 341 is a metal cylinder having substantially the same diameter as the inner diameter of the housing 31 and having openings at both ends, and is in sliding contact with the inner peripheral surface of the housing 31.
It can move forward and backward with the b side. Intake net 342
Is formed by shaping a metal strain net into a tubular shape having substantially the same diameter as the tubular body 341, and is adhered to the lower end surface of the housing 31. The cover plate 343 is adhered to the lower end surface of the intake net 342 and closes the lower end of the movable tube 34. That is, the lower half of the side wall of the movable tube 34 becomes an oil suction port 344 provided with the intake net 342.

A spring 35 is interposed between the movable tube 34 and the disk 32, and constantly urges the movable tube 34 upward.

In the movable tube 34, there is provided a thermostat 8 as a suction port adjusting means. The thermostat 8 includes a main body 81 having three legs 811 at the top and a main body 8.
The piston 82 is connected to a cover plate 343 of the movable tube 34.

FIG. 3 shows a cross section of the thermostat 8. The structure of the main body 81 of the thermostat 8 is of a general configuration used for a valve for adjusting the temperature of cooling water or the like. The housing 812 of the main body 81 holds the piston 82 movably up and down, and the piston 8 that enters the housing 812
A rubber sleeve 813 and wax 814 are sealed around the tip of the second. When the ambient temperature rises, the wax 814 is heated to liquefy and expand in volume. The rubber sleeve 813 is compressed by the volume-expanded wax 814 to push out the piston 82, and the piston 82 is
It is designed to advance from 1. That is, the suction port 34
The body 81 rises with respect to the movable pipe 34 with an increase in the temperature of the oil sucked in through the movable pipe 34 and, when a certain temperature is exceeded, the legs 811 of the main body 81 press the housing 31 and the movable pipe 34 34 moves relatively downward from the housing 81.

FIG. 4 is a cross section centered on the oil strainer 3 and shows a change with time from the start of warming up of the internal combustion engine. The operation of the lubricating device according to the present embodiment will be described with reference to FIGS. When the internal combustion engine is started, the oil pump 5 is operated by the engine power and the intake port 344 of the oil strainer 3 is operated.
Oil is inhaled from. The oil strainer 3 rises due to the suction negative pressure of the oil pump 5 and stops at a position defined by the step 312 at the lower end of the side wall of the housing 31 and the lower end surface of the distal end 41 of the suction pipe 4. Immediately after the start of warming-up, the temperature of the sucked oil is low (for example, 50 ° C. or less), the advance length of the piston 82 of the thermostat 8 is short, and the upper end of the movable pipe 34 is in contact with the housing 31. In this state, the lower end of the movable tube 34 is
The suction pipe 4 is positioned in advance so as to have the same height as the suction pipe 1.

Since the lower end of the movable pipe 34 is at the same height as the partition wall 21 of the oil pan 2, the suction port 344 is open to the upper first tank 2a side (FIG. 4A). . Thus, the oil is supplied from the first tank 2a to the oil strainer 3 to
Suction pipe 4-pump 5-filter 6-oil passage 7-first tank 2
Circulates along the path a. Communication hole 211 of partition wall 21
Is small because the oil temperature is low, and the oil stored in the second tank 2b hardly contributes to the circulation of the oil. That is, a relatively small amount of oil except for the oil stored in the second tank 2b circulates, and the oil quickly rises in temperature due to heat generated by the engine.

When the temperature of the oil rises, the piston 82 of the thermostat 8 advances, and when the temperature rises above 50 ° C., the leg 811 presses the housing 31 and the movable tube 3
4 descends against the spring force of the spring 35, and the lower end advances to the second tank 2b side (FIG. 4B). As a result, the suction port 344 of the movable pipe 34 opens to the second tank 2b side together with the first tank 2a side, and oil is directly sucked from the second tank 2b.

The same amount of oil as the oil sucked from the second tank 2b flows from the first tank 2a to the second tank 2b through the communication hole 211 formed in the partition wall 21, and the oil is removed. Oil stored in the second tank 2b also contributes to circulation. As a result, the temperature of the oil stored in the second tank 2b also gradually increases, and the viscosity decreases. At this time, since the low-temperature oil stored in the second tank 2b is mixed with the oil sucked by the oil strainer 3, the oil temperature gradually increases thereafter, but has already been increased by 50 °. C
Therefore, the oil injected into each part of the internal combustion engine exhibits good lubrication performance and the like.

As the oil temperature rises, the first tank 2
When the opening area on the side a decreases and the opening area on the side of the second tank 2b increases, and the oil temperature exceeds a predetermined temperature (for example, 80 ° C.), the upper end of the suction port 344 reaches the partition wall 21 position. , Opening only on the second tank 2b side (FIG. 4 (C)).
Thus, oil is sucked only from the second tank 2b. At this time, the oil circulates smoothly in the route of the second tank 2b, the oil strainer 3, the suction pipe 4, the pump 5, the oil passage 7, the first tank 2a, the communication hole 211, and the second tank 2b. That is, when the oil temperature exceeds the predetermined temperature, the oil stored in the first tank 2a and the oil stored in the second tank 2b circulate at substantially the same speed.

As described above, the oil temperature can be quickly raised during the warm-up operation, and the oil is directly sucked from the second tank with the increase in the oil temperature. In this case, the oil can satisfactorily contribute to the circulation without stagnation, and can exert a lubricating action and the like satisfactorily even during high-speed rotation without oil shortage.

When the recovered oil flows into the first tank 2a, air is mixed into the stored oil, but air is often mixed when the oil has a low oil viscosity and high temperature. Now the second tank 2b
Is separated from the first tank 2a by the partition wall 21, and the second tank 2b is formed below the first tank 2a, so that air lighter than oil is introduced into the second tank 2b. Penetration is slight. When the temperature is high, the suction port 344 is open to the second tank 2b side, so that air is appropriately prevented from being mixed into the suction oil.

When the oil temperature is low, the intake port 344 of the oil strainer 3 is normally used as shown in FIG.
Is open facing the first tank 2a side. However, at the time of cold start in an extremely cold region or when the oil is rotated at a high speed before the oil temperature sufficiently rises, the viscosity of the oil is low. In some cases, the oil is not quickly collected, and the oil level of the oil pan 2 may decrease. FIG. 5 shows such a case. At this time, since air is sucked into the oil from the suction port 344,
The suction negative pressure decreases, and the oil strainer 3 cannot be pushed up. Thus, the oil strainer 3 descends by its own weight, and the suction port 344 sinks below the oil level and the suction port 344
Stop at the position where air is no longer mixed in. That is, in the lubricating apparatus according to the present embodiment, even if the oil level is lowered, the oil strainer 3 is also lowered and the second tank 2a is
Can be replenished with the oil stored in the oil tank, and a shortage of oil can be avoided.

(Second Embodiment) FIG. 6 shows a second embodiment of the present invention. In the configuration of the first embodiment, the oil strainer is replaced with another oil strainer. In the drawings, the portions denoted by the same reference numerals as those in FIGS. 1 to 5 perform substantially the same operation. The following description focuses on the differences from FIG. Except for the oil strainer, the configuration is the same as that of the first embodiment, so the same reference numerals as those in FIG. 1 are used.

In the circular housing 36 of the oil strainer 3A, the step portion 362 at the upper end of the side wall 361 is in sliding contact with the inner peripheral surface of the distal end portion 41 of the suction pipe 4, and the distal end portion 41 holds the oil strainer 3A vertically movable. It has become.

The housing 36 is divided into three chambers, a first chamber 36a on the upper side, and a second chamber 36b and a third
A chamber 36c is formed. First chamber 36a and second chamber 36
b is communicated by a communication hole 363. Second chamber 36b
The third chamber 36c communicates with the third chamber 36c via a thermostat valve 9 serving as suction port adjusting means provided through the partition 364. An upper wall 365 of the housing 36 is provided with a through hole 366 for oil distribution. Side wall 361
A first suction port 367 is formed at the position of the second chamber 36b, and an intake net 37A is fitted into the first suction port 367. A second suction port 369 is formed in the lower wall 368 at the position of the second chamber 36b, and an intake net 37B is fitted into the second suction port 369.

The thermostat valve 9 has the same basic structure as that for adjusting the cooling water temperature, and has a housing 91 fitted in a partition wall 364 in a liquid-tight manner. A seat 94 and an umbrella-shaped valve 93 are provided, and a spring 94 is constantly urged to the valve 93 in the valve closing direction (left direction in the figure). In the housing 91, a piston 95 extends coaxially with the seat 92 and the valve 93 from the left end of the housing 91. A temperature sensing part 96 is provided around the right half of the piston 95, and the left end thereof is a valve 93.
Connected to As the temperature sensing portion 96, a rubber sleeve and wax sealed in a cylinder surrounding the piston 95 as shown in FIG. 3, for example, is used.

A shaft 97 extends from the right end of the temperature sensing portion 96, and another circular valve 98 is connected to the end of the shaft 97. Valve 9
Numeral 8 is opposed to the first suction port 367, and constitutes a valve portion having a seat on the inner peripheral portion of the suction port 367 on the indoor side.

In the oil strainer 3A, when the temperature is low (for example, 50 ° C. or lower), the valve 93 is closed and another valve 98 is open as shown in the figure. When the temperature of the oil sucked into the oil strainer 3A rises, the wax in the temperature sensing portion 96 liquefies and expands, and the temperature sensing portion 96 is displaced rightward with respect to the piston 95, and a valve integrated with the temperature sensing portion 96 is provided. When the temperature 93 rises and the temperature sensing portion 96 is further displaced rightward, another valve 98 is closed.

FIG. 7 shows an oil strainer 3 of the oil pan 2.
A cross-section centered at A shows a temporal change from the start of warming up to the end of warming up of the internal combustion engine. The operation of the lubricating device according to the present embodiment will be described with reference to FIGS. When the internal combustion engine is started, similarly to the first embodiment, the oil strainer 3
A rises due to the negative suction pressure of the oil pump 5. In this state, the lower end of the first suction port 367 is located above the partition wall 21 of the oil pan 2 and the second suction port 369
So that the suction pipe 4 is located below the partition wall 21.
Is positioned. Thus, the first suction port 367 opens to the first tank 2a side of the oil pan 2 and the second suction port 367
69 opens to the second tank 2b side.

Since the temperature of the circulating oil is low immediately after the start, the valve 93 is seated on the seat 92 and the second suction port 369 is substantially closed. Another valve 98 is the first
Of the first chamber 36 is opened.
a, and communicate only with the first tank 2a via the second chamber 36b (FIG. 7A). Thus, the oil circulates in the path of the first tank 2a, the oil strainer 3A, the suction pipe 4, the oil pump 5, the filter 6, the oil path 7, and the first tank 2a.
The oil flow through the communication hole 211 of the partition wall 21 is the first
As described in the embodiment, a relatively small amount of oil except for the oil stored in the second tank 2b circulates, and the temperature of the oil quickly rises due to the heat generated by the engine.

When the temperature of the oil rises and exceeds 50 ° C., the temperature sensing portion 96 is displaced rightward against the spring force of the spring 94. At the same time, another valve 98 is displaced rightward, and valve 93 is seat 9
2 and substantially open the second suction port 369 (FIG. 7B). Thereby, the suction pipe 4 communicates with the second tank 2b via the first chamber 36a, the second chamber 36b, and the third chamber 36c, and oil is also sucked from the second tank 2b. A communication hole 211 formed in the partition wall 21 has the same amount of oil as the oil sucked from the second tank 2b as in the first embodiment.
Flows from the first tank 2a to the second tank 2b, and the oil stored in the second tank 2b also contributes to circulation, and the oil temperature rises slowly.

Further, the temperature of the oil rises to a predetermined temperature (for example, 8
When the temperature exceeds 0 ° C., the temperature sensing part 96 is further displaced to the right, and another valve 98 closes the first suction port 367 (FIG. 7).
(C)). Thus, oil is sucked only from the second tank 2b. At this time, the oil flows smoothly through the second tank 2b, the oil strainer 3A, the suction pipe 4, the oil pump 5, the filter 6, the oil path 7, the first tank 2a, the communication hole 211, and the second tank 2b. Circulates.

As described above, also in the present embodiment, the first
As in the case of the embodiment, the oil temperature can be raised quickly, and the lubricating action can be exhibited well without running out of oil or the like even during high-speed rotation.

The tanks 2a and 2b are divided by the partition wall 21, and the first tank 2a is formed above the second tank 2b, so that the invasion of air into the second tank 2b is suppressed, Sometimes the second suction port 36 opened on the side of the second tank 2b.
Since the oil is sucked in from the nozzle 9, a small amount of the mixed air can be supplied to the circulation. Further, by configuring the oil strainer 3A to be vertically movable with respect to the intake pipe 4, the position of the first intake port 367 is lowered according to the level of the oil level in the oil pan 2 as shown in FIG. Is prevented.

In each of the above embodiments, the oil strainer is automatically lowered when the suction port is exposed from the oil level. However, a sensor for detecting the oil level is provided in the oil pan, and the oil pan is provided in accordance with the detection position. The oil strainer may be moved up and down by driving means such as an actuator. In addition, if the internal combustion engine is unlikely to cause an oil shortage at low temperatures, an oil strainer may be integrally connected to the suction pipe.

(Third Embodiment) FIG. 9 shows a third embodiment of the present invention. In the configuration of the first embodiment, the oil pan and the oil strainer are different from each other.
Since the portions denoted by the same reference numerals as those in FIGS. 1 to 5 perform substantially the same operation, a description will be given focusing on differences from the first embodiment. FIG. 9A shows an internal combustion engine to which the lubricating device according to the present embodiment is applied, and FIG. 9B shows an oil strainer.

The oil pan 2A has basically the same configuration as that of the first embodiment, except that the partition wall 21A is
13 and a horizontal part 214, the left side and the upper part of the oil pan 2A with respect to the partition wall 21A are the first tank 2a, and the lower right part of the oil pan 2A is the second tank with respect to the partition wall 21A. 2b. Oil is collected in the first tank 2a by passing through or dropping through the engine block 1.

The oil strainer 3B has basically the same configuration as that of the first embodiment, and is provided through the vertical portion 213 of the partition wall 21A. Oil strainer 3B
Has a housing 31A having basically the same configuration as that of the first embodiment, the housing 31A is integrated with the distal end of the suction pipe 4, and the oil strainer 3B itself is movable unlike the first embodiment. Absent.

The housing 31A holds the movable tube 34 so that it can move linearly. The movable tube 34 is displaced in the left-right direction with respect to the vertical direction in the first embodiment, and the first tank 2a side and the second tank 2b side.

The suction pipe 4 is positioned such that the right end of the movable pipe 34 is located at the vertical portion 213 of the partition wall 21A of the oil pan 2A at a low temperature.

Thus, the suction port 344 of the movable tube 34 is open to the first tank 2a at a low temperature, and as the temperature rises, the leg 811 of the thermostat 8 moves to the housing 31A.
, The movable tube 34 is displaced rightward, and the suction port 344 is opened also on the second tank 2b side, and the opening area is further increased.

FIG. 10 is a cross-section centered on the oil strainer 3B of the oil pan 2A and shows a change with time since the start of warming up the internal combustion engine. The operation of the lubricating device according to the present embodiment will be described with reference to FIGS. In the first embodiment, the movable tube 34 descends as the oil temperature rises and advances toward the second tank 2b, whereas in the present embodiment, the movable tube 3
4 is displaced rightward as the oil temperature rises,
Except for the advance to the b side, the operation is substantially the same. That is, when the temperature of the oil is low, the suction port 344 of the movable pipe 34
The oil is opened only in the first tank 2a (FIG. 10A), and the oil flows from the first tank 2a to the oil strainer 3B to the suction pipe 4 to the oil pump 5 to the filter 6 to the oil passage 7 to the first oil. Tank 2
A relatively small amount of oil except for the oil stored in the second tank 2a circulates along the path a, and the temperature of the oil quickly rises due to heat generated by the engine.

When the oil temperature rises above 50 ° C., the suction port 344 of the movable pipe 34 opens to the second tank 2b together with the first tank 2a (FIG. 10B). , Second
The oil temperature slowly rises while the oil stored in the tank 2b also contributes to circulation.

Further, the oil is heated to a predetermined temperature (for example, 80 °).
When the pressure exceeds C), the suction port 344 opens only on the second tank 2b side, and oil is sucked only from the second tank 2b (FIG. 10C). At this time, the oil is supplied to the second tank 2b.
~ Oil strainer 3B ~ Suction pipe 4 ~ Oil pump 5
The fluid circulates smoothly along a route from the filter 6 to the oil passage 7 to the first tank 2a to the communication hole 211 to the second tank 2b.

As described above, also in the present embodiment, the oil temperature can be raised quickly, and the lubricating action can be satisfactorily performed without running out of oil even during high-speed rotation, as in the above embodiments. Etc. can be exhibited.

Further, by dividing the tanks 2a and 2b by the partition wall 21, the invasion of air into the second tank 2b is suppressed, and the second suction port 369 opened on the side of the second tank 2b when the temperature is high. Since the oil is sucked from the air, a small amount of the mixed air can be supplied to the circulation.

(Fourth Embodiment) FIG. 11 shows a fourth embodiment of the present invention. In the configuration of the third embodiment, the oil strainer is another oil strainer.
Since the portions denoted by the same reference numerals as those in FIGS. 1 to 10 perform substantially the same operation, differences from the third embodiment will be mainly described. Except for the oil strainer, it has the same configuration as that of the third embodiment, so the same reference numerals as in FIG. 9 are used.

The oil strainer 3C has a rectangular housing 38. The inside of the housing 38 is divided into two chambers 38a and 38b on the right and left sides by a partition wall 381. Housing 3
The suction pipe 4 is connected to the upper wall 382 at the position of the first chamber 38a through the upper wall 382, and the oil strainer 3C and the suction pipe 4 are integrated. Side wall 38 of housing 38
3, through holes 384 and 385 are formed at opposing positions, the through hole 384 on the first chamber 38a side is used as the first suction port 384, and the through hole 385 on the second chamber 38b side is used as the second suction port 384. 385. Both suction ports 384, 385
Are fitted with intake nets 39A and 39B.

The suction pipe 4 integrated with the housing 38 is
The partition wall 381 of the housing 38 is positioned so as to be substantially at the position of the vertical portion 213 of the partition wall 21A of the oil pan 2A, the first suction port 384 opens to the first tank 2a side, and the second suction port 385 is Open to the second tank 2b side.

A thermostat valve 9 is provided in the partition wall 381 of the housing 38 so as to penetrate the partition wall 381. The seat 92 and the valve 93 allow the first chamber 38a and the second chamber 38b to communicate or block. ing. Another valve 98 connected to the tip of a shaft 97 extending from the temperature sensing portion 96
Open and close the first suction port 384. That is, at a low temperature (for example, 50 ° C. or lower), the valve 93 is closed and another valve 98 is open as shown in the figure. When the temperature of the oil sucked into the oil strainer 3C rises, the temperature sensing part 96 is displaced leftward with respect to the piston 95, and
When the temperature is further increased, another valve 98 is opened.
Is closed.

FIG. 12 is a cross section centered on the oil strainer 3C of the oil pan 2A, and shows a change with time from the start of warming up to the end of warming up of the internal combustion engine. The operation of the lubricating device according to the present embodiment will be described with reference to FIGS. When the temperature of the oil is low, the first suction port 384 is open and the second suction port 385 is substantially closed (FIG. 12A), and the oil flows from the first tank 2a to the oil strainer 3C to the suction pipe. 4 to oil pump 5 to filter 6 to oil path 7 to first tank 2
A relatively small amount of oil except for the oil stored in the second tank 2a circulates along the path a, and the temperature of the oil quickly rises due to heat generated by the engine.

When the oil temperature rises above 50 ° C., the first suction port 384 and the second suction port 385
Opens (FIG. 12B), and the oil temperature slowly rises while the oil stored in the second tank 2b also contributes to circulation.

Further, the oil is heated to a predetermined temperature (for example, 80 °).
When the pressure exceeds C), the first suction port 384 is closed, only the second suction port 385 is opened, and oil is sucked only from the second tank 2b (FIG. 12C). At this time, the oil
It smoothly circulates in a route of the second tank 2b, the oil strainer 3C, the suction pipe 4, the oil pump 5, the filter 6, the oil path 7, the first tank 2a, the communication hole 211, and the second tank 2b.

As described above, also in the present embodiment, the oil temperature can be raised quickly, and the lubricating action can be satisfactorily performed without running out of oil even during high-speed rotation, as in the above embodiments. Etc. can be exhibited.

By dividing the tanks 2a and 2b by the partition wall 21, the invasion of air into the second tank 2b is suppressed, and the second suction port 385 opened to the side of the second tank 2b when the temperature is high. Since the oil is sucked from the air, a small amount of the mixed air can be supplied to the circulation.

In each of the above embodiments, the opening / closing control of the intake port is performed by the thermostat. However, the movable pipe and the valve for opening / closing the intake port are configured to be driven by an actuator, and an oil strainer is provided in the oil strainer. A configuration may be adopted in which a temperature sensor for detecting the temperature of the sucked oil is provided, and the actuator is operated according to the detected temperature.

[Brief description of the drawings]

FIG. 1A is a configuration diagram of an internal combustion engine to which a first lubrication device of the present invention is applied, and FIG. 1B is a perspective view showing a main part of the lubrication device.

FIG. 2 is an exploded perspective view of an oil strainer of the first lubrication device of the present invention.

FIG. 3 is a cross-sectional view of a thermostat constituting an oil strainer of the first lubricating device of the present invention.

FIGS. 4A, 4B, and 4C are cross-sectional views showing changes over time after the start of warm-up of the main part of the first lubricating device of the present invention.

FIG. 5 is a sectional view of a main part of the first lubricating device of the present invention when the oil level is lowered.

FIG. 6 is a broken perspective view of an oil strainer of the second lubrication device of the present invention.

FIGS. 7A, 7B, and 7C are cross-sectional views showing changes over time after the start of warm-up of a main part of the second lubricating device of the present invention.

FIG. 8 is a sectional view of a main part of the second lubricating device of the present invention when the oil level is lowered.

FIG. 9A is a configuration diagram of an internal combustion engine to which a third lubrication device of the present invention is applied, and FIG. 9B is a perspective view illustrating a main part of the lubrication device.

FIGS. 10A, 10B, and 10C are cross-sectional views showing changes over time after the start of warm-up of a main part of the third lubricating device of the present invention.

FIG. 11 is a broken perspective view of an oil strainer of a fourth lubrication device of the present invention.

FIGS. 12A, 12B, and 12C are cross-sectional views showing changes over time after the start of warm-up of a main part of the fourth lubricating device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Engine block 2, 2A Oil pan 2a 1st tank 2b 2nd tank 21, 21A Partition wall 211 Communication hole 3, 3A, 3B, 3C Oil strainer (suction part) 31 Housing 34 Movable pipe (movable part) 344, 367, 369, 384, 385 Suction port 4 Suction pipe 41 Tip 5 Oil pump (pump) 8 Thermostat (Suction port adjustment means) 9 Thermostat valve (Suction port adjustment means)

Claims (5)

[Claims] An oil pan for storing lubricating oil is provided at a lower portion of an internal combustion engine, and the lubricating oil stored in the oil pan is sucked up by a pump from a suction port of a suction unit connected to the pump via a suction pipe. In a lubricating device for lubricating each part of an internal combustion engine and collecting lubricating oil from each part to an oil pan,
The oil pan is divided into a first tank through which the lubricating oil is collected from the respective parts by a partition wall, and a second tank that communicates with the first tank through a communication hole formed in the partition wall. The part is disposed so as to straddle both tanks, and the ratio of the opening area of the suction port on the first tank side to the opening area of the second tank side is configured to be adjustable. A lubricating apparatus comprising: a suction port adjusting means for increasing an opening area of a suction port on a second tank side as a temperature of lubricating oil to be sucked increases. 2. The lubricating device according to claim 1, wherein the suction portion is a tubular movable portion disposed through the partition wall, and the movable portion is connected to a first tank side and a second movable portion. A housing for holding the tank so as to be able to move forward and backward with respect to the tank side, wherein the suction port is formed on the side wall of the movable portion, and the suction port adjusting means increases the temperature of the lubricating oil sucked up from the suction port. The lubricating device has a configuration in which the movable portion is driven to advance toward the second tank side in accordance with the above. 3. The lubricating device according to claim 1, wherein the suction portion has a first suction port formed on a first tank side and a second suction port formed on a second tank side. The suction port is provided with a valve for opening and closing the suction port, and the suction port adjusting means drives the first suction port valve to open as the temperature of the lubricating oil sucked up from the suction port rises. Second with
The lubricating device is configured to drive the valve of the suction port to close the valve. 4. The lubricating apparatus according to claim 1, wherein said partition wall is provided horizontally, and said first tank is formed above said second tank. 5. The lubricating device according to claim 4, wherein the suction portion is provided so as to penetrate the partition wall, and a distal end of the suction pipe is provided so that the suction portion and the first tank are located above the suction portion. A lubricating device configured to hold the second tank side so as to be able to move forward and backward.