JP2007211593A - Lubrication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-tank oil pan structure capable of shortening the warm-up operation time and to suppress the deterioration of the durability of the oil by using stored oil as evenly as possible A storage device is provided.
An inner plate 160 is accommodated inside an oil storage device 130. The inner plate 160 is configured and arranged so as to form a main storage chamber 131, an outer reservoir chamber 132, and a reflux oil storage portion 133 above the reservoir chamber 132 inside the oil storage device 130. ing. A reflux oil guiding weir 162 b is provided in the reflux oil separator 162 that partitions the reservoir chamber 132 and the reflux oil storage portion 133. The reflux oil guide weir 162 b is configured to guide the oil that has returned from the cylinder block 120 toward the second thermostat valve device 166.
[Selection] Figure 1

Description

  The present invention relates to an oil storage device configured to store oil for lubrication of a lubricated mechanism (for example, an engine block or an automatic transmission mechanism).

  In general, this type of lubricated mechanism sucks the oil stored in the oil storage device and applies it to a lubricated member (for example, a gear, a camshaft, a piston, etc.) disposed in the lubricated mechanism. It is comprised so that it can supply. The oil storage device is configured to collect the oil that has been lubricated and cooled by the lubricated member by the action of gravity.

Conventionally, a so-called two-tank oil pan structure is widely known as a structure of the oil storage device that can promote the progress of warm-up operation in this type of lubricated mechanism. As a typical example of the prior art of this two-tank oil pan structure, one described in Japanese Patent Application Laid-Open No. 2003-222012 (Patent Document 1) can be given.
JP 2003-222012 A

  In this conventional two-tank oil pan structure, an oil pan separator is disposed in a space inside the oil pan capable of storing oil. The oil pan separator is configured to partition the space inside the oil pan into a main chamber in which a suction port is disposed and a sub chamber in which the suction port is not disposed. The main chamber is formed so as to communicate with the interior of the engine block, and the oil that has received heat in the engine block can be preferentially collected in the main chamber. The sub chamber is formed all around (side and below) the main chamber.

  The oil pan separator is provided with a recess that forms the main chamber. A communication hole for communicating the main chamber and the sub chamber is formed in the recess. This communication hole is formed as a through hole having a diameter of about 2 mm through which the oil having a high viscosity at a low temperature during the warm-up operation is difficult to pass. That is, the communication hole is configured to control the alternating current of the oil between the sub chamber and the main chamber by utilizing a change in the viscosity of the oil.

  In such a configuration, the oil that has received heat in the engine block is preferentially collected in the main chamber, whereby the temperature of the oil in the main chamber is raised quickly. Here, for a while after the engine is cold started, the oil in the sub chamber has a low temperature and a high viscosity, so that it is difficult for the oil to flow into the main chamber from the sub chamber. Moreover, the said suction inlet is arrange | positioned in the said main chamber. Therefore, during the warm-up operation after the cold start, the oil whose temperature has been raised early in the main chamber is preferentially circulated in the lubricated mechanism, and this oil returns to the main chamber again. . Thereby, the temperature increase of the oil in the main chamber can be further promoted, and thus the warm-up operation can be further promoted.

In the conventional two-tank oil pan structure described above, the oil flow path in the oil flow path when assuming an oil flow path that flows into the main chamber from the sub chamber through the communication hole and is sucked into the suction port. Let the oil flow resistance be R _2-1 . Further, in the case where the oil which has been previously stored in the main chamber has assumed an oil flow path is sucked into the suction port, the flow resistance of the oil in the oil passage to R _1-1. At this time, clearly, R _2-1 is larger than R _1-1 . Therefore, even after the warm-up operation is completed, the oil in the main chamber is mainly sucked in by the suction port and supplied to the lubricated mechanism as in the warm-up operation.

  As described above, in the conventional two-tank oil pan structure, the oil in the sub chamber remains in the sub chamber and is not easily supplied to the lubrication mechanism. There has been a problem in that deterioration of oil in the main chamber is promoted by intensive use.

Means for Solving the Problems and Effects of the Invention

  The present invention has been made in order to solve the above-described problems, and its object is to provide a two-tank oil pan structure that can shorten the warm-up operation time, and to store the stored oil as much as possible. It is to provide an oil storage device in which deterioration of the durability of the oil is suppressed by being used evenly.

  An oil storage device that is an object of the present invention includes an oil pan and an oil pan separator, and is configured to store oil for lubrication of the lubrication target mechanism. The oil pan is configured to store the oil in an inner space. The oil pan separator is disposed in the space so as to divide the space inside the oil pan where the oil can be stored into a main storage chamber and a reservoir chamber. Here, the main storage chamber is provided so as to open toward the lubricated mechanism. The reservoir chamber is provided adjacent to the main storage chamber.

  The lubricated mechanism connected to the oil storage device having such a configuration is provided with an oil pump configured to be able to send the oil stored in the main storage chamber toward the lubricated mechanism. Yes. An oil suction port is provided at the bottom of the main storage chamber. The oil suction port is configured to suck the oil stored in the bottom of the main storage chamber. The oil that has passed through the oil suction port can be sent to the oil pump.

  (1) In order to achieve the above-described object, a feature of the present invention is that the oil storage device includes a first control valve, a reflux oil separator, a second control valve, and a reflux oil guiding unit. It is in.

  The first control valve is provided in the reserve oil separator. The first control valve is configured to permit the inflow of the oil from the reservoir chamber to the bottom of the main storage chamber by being opened according to the operating state of the lubricated mechanism. . The reflux oil separator is configured so that a reflux oil reservoir can be formed above the reservoir chamber. The reflux oil storage portion is formed so as to be able to store the remaining portion of the reflux oil that returns from the lubricated mechanism toward the oil pan, except for the portion that directly returns to the main storage chamber. . The second control valve is provided in the reflux oil separator. The second control valve is configured to allow the inflow of the oil from the reflux oil reservoir to the reservoir chamber by being opened according to the operating state of the lubricated mechanism. The reflux oil guiding section is configured to guide the reflux oil toward the second control valve.

  When the lubricated mechanism connected to the oil storage device of the present invention having such a configuration is operated, the oil pump is activated. By the operation of the oil pump, the oil in the main storage chamber is sucked through the oil suction port. The oil is supplied to the lubricated mechanism by being sent out toward the lubricated mechanism by the oil pump. The oil supplied to the lubrication mechanism is lubricated and cooled by the lubrication mechanism, and then returns to the oil pan as the reflux oil.

  A part of the reflux oil flows directly into the main storage chamber that opens toward the lubrication mechanism. Thereby, the temperature rise of the oil in the main storage chamber is promoted. Further, the remaining portion of the reflux oil is stored in the reflux oil storage portion formed by the reflux oil separator. Here, the recirculation oil that has recirculated to the recirculation oil reservoir is guided toward the second control valve by the recirculation oil guide. Thereby, a certain amount of the recirculated oil is retained in the vicinity of the second control valve.

  During the warm-up operation after the cold start in the lubricated mechanism, the first control valve and the second control valve are closed. As a result, the oil supplied to the lubrication mechanism and performing the lubrication / cooling action can be limited to that in the main storage chamber. Thereby, progress of warm-up operation is promoted.

  After the warm-up operation has progressed to a predetermined degree, the warm-up operation ends. For example, the warm-up operation ends when the temperature of the oil in the main storage chamber or the temperature of each part in the lubricated mechanism reaches a predetermined warm-up operation end temperature. Alternatively, the warm-up operation ends after a predetermined warm-up operation time determined by a predetermined parameter such as the outside air temperature at the start from the cold start. At the end of the warm-up operation, the first control valve and the second control valve are opened.

  By opening the first control valve, the bottom of the main storage chamber and the reservoir chamber communicate with each other with a relatively small flow path resistance. Thus, the oil stored in the reservoir chamber flows relatively easily into the main storage chamber, is sucked in by the oil suction port, and can be supplied to the lubricated mechanism.

  Moreover, the upper part of the reservoir chamber and the reflux oil reservoir are communicated with each other with a relatively small flow path resistance by opening the second control valve. Then, the reflux oil stored in the vicinity of the second control valve flows into the upper portion of the reservoir chamber. This increases the difference in oil level between the reservoir chamber and the main storage chamber. Due to the differential pressure between the reservoir chamber and the main storage chamber due to the difference in oil level, the oil stored in the reservoir chamber flows into the main storage chamber vigorously.

  As described above, according to the present invention, a certain amount of the recirculated oil is secured in the vicinity of the second control valve, and the recirculated oil flows into the reservoir chamber by opening the second control valve. By doing so, the inflow of the oil from the reservoir chamber into the main reservoir chamber via the first control valve can be further promoted. Therefore, according to the present invention, the exchange of oil between the reservoir chamber and the main storage chamber is actively performed without diminishing the effect of the two-tank oil pan structure that promotes the progress of warm-up operation. Can be done. That is, the oil stored in the oil pan is used as evenly as possible. Thereby, deterioration of the durability of the oil can be suppressed.

  (1 ') The oil pan separator and the reflux oil separator may be integrally formed. As a result, the oil storage device in which warm-up operation is favorably promoted and the oil can be used as evenly as possible can be realized at an inexpensive manufacturing cost.

  (2) The recirculation oil guide section may include a recirculation oil induction weir provided so as to extend upward from the recirculation oil separator. The reflux oil guiding weir is preferably formed integrally with the reflux oil separator.

  Thereby, the said reflux oil guidance | induction part can be implement | achieved by a simpler structure. That is, from the recirculation oil storage portion when the second control valve is opened, the inflow of the oil from the reservoir chamber to the main storage chamber through the first control valve can be further promoted. The inflow state of the reflux oil to the upper part of the reservoir chamber is realized with a simpler device configuration.

  (3) The oil pan may include an oil storage portion and a slope portion, and a reflux oil guide portion constituting the reflux oil guide portion may be formed in the slope portion. Here, the oil storage portion is configured to surround the space in which the main storage chamber and the reservoir chamber are formed. The slope portion is disposed so as to face the lubricated mechanism. The slope portion is formed so as to receive the reflux oil and allow it to flow into the oil storage portion. Further, the reflux oil guide part is configured to guide the reflux oil received by the slope part toward the reflux oil guide part.

  In this configuration, a part of the reflux oil is received by the slope portion and flows on the slope portion toward the oil storage portion. A part of the reflux oil flows into the oil storage part, and the remaining part is guided toward the reflux oil guiding part by the reflux oil guide part. Then, the reflux oil guided toward the reflux oil guiding section is guided toward the second control valve by the reflux oil guiding section.

  According to this configuration, as much of the reflux oil as possible is guided to the vicinity of the second control valve. Thereby, the return from the return oil storage part to the upper part of the reservoir chamber when the second control valve is opened, so that the oil stored in the oil pan is used more evenly. The inflow state of oil can be formed better.

  (4) The reflux oil guide section may be configured by a reflux oil guide weir provided to extend upward from the slope section. Thereby, the said reflux oil guide part which can guide as much said reflux oil as possible to the said reflux oil guidance part is implement | achieved by a simpler apparatus structure.

  (5) The recirculation oil guide weir and the recirculation oil guide weir may be configured as follows: the recirculation when seen through from the vertical direction and the direction perpendicular to the longitudinal direction of the recirculation oil induction weir. The reflux oil guide weir and the reflux oil guide weir are arranged so that one end portion in the longitudinal direction of the oil guide weir overlaps with one end portion in the longitudinal direction of the reflux oil guide weir.

  According to this configuration, the reflux oil guided toward the reflux oil guide weir by the reflux oil guide weir passes through the portion where the reflux oil guide weir and the reflux oil guide weir overlap. Delivered to the induction weir. Therefore, as much of the reflux oil as possible is guided to the vicinity of the second control valve via the reflux oil guide weir and the reflux oil guide weir. Therefore, the recirculation oil guide portion that uses the oil stored in the oil pan more evenly is realized with a simpler device configuration.

  (6) The oil storage device may be configured as follows: The oil storage device further includes an oil level gauge guide cylinder made of a cylindrical member. The oil level gauge guide tube is configured to accommodate an oil level gauge made of a rod-shaped member so as to guide attachment / detachment of the oil level gauge. The reflux oil separator has an oil level gauge insertion through hole into which the oil level gauge is inserted. The lower end portion of the oil level gauge guide tube is liquid-tightly connected to a portion around the through hole for inserting the oil level gauge in the reflux oil separator.

  In such a configuration, when the oil level gauge is attached to the oil storage device, the tip of the oil level gauge is accommodated in the oil level gauge guide tube. Subsequently, the tip of the oil level gauge passes through the oil level gauge insertion through hole.

  Here, in this configuration, the lower end portion of the oil level gauge guide tube and the portion around the through hole for inserting the oil level gauge in the reflux oil separator are liquid-tightly connected. That is, the oil level gauge guide cylinder suppresses the recirculation oil stored in the recirculation oil storage part from flowing into the reservoir chamber through the oil level gauge insertion through hole.

  According to this configuration, as much of the reflux oil as possible is guided to the vicinity of the second control valve without flowing out to the reservoir chamber. Therefore, a sufficient storage amount of the reflux oil in the vicinity of the second control valve before the opening of the second control valve can be ensured. Therefore, a sufficient amount of the oil from the recirculation oil reservoir to the upper portion of the reservoir chamber so that a sufficient amount of the oil can flow into the main reservoir chamber from the reservoir chamber via the first control valve. The inflow of the reflux oil is realized with a simpler device configuration.

  (6 ') The oil level gauge guide tube may be formed integrally with the reflux oil separator. Thereby, the sealing performance in the joint location of the said oil level gauge guide cylinder and the main-body part of the said recirculation | reflux oil separator improves more. That is, the recirculation oil stored in the recirculation oil storage section can be suppressed as much as possible from flowing into the oil level gauge guide tube and the oil level gauge insertion through hole. Further, the reflux oil separator including the oil level gauge guide tube can be formed at a lower cost.

  (6 ″) The through hole for inserting the oil level gauge is formed at the highest position in the reservoir chamber, so that the lower end of the oil level gauge guide tube does not protrude into the reservoir chamber, The reflux oil separator may be configured, in which case the reservoir chamber is formed at the lower opening end of the oil level gauge insertion through hole (which constitutes the lower end of the oil level gauge guide tube). Preferably, an air discharge guide surface is formed so that air can be easily discharged upward from the highest position of the oil level gauge, for example, on the inner surface of the oil level gauge guide tube. It is a lower end part, Comprising: It can form so that opening area may spread toward the downward direction.

  According to such a configuration, the air in the reservoir chamber can be smoothly discharged upward through the oil level gauge insertion through hole and the oil level gauge guide tube.

  (7) It is preferable that the oil level gauge guide cylinder is configured such that the height of the oil level gauge guide cylinder is higher than the height of the reflux oil guiding portion. As a result, the recirculation oil stored in the recirculation oil storage section can be more effectively suppressed from flowing into the oil level gauge guide tube and the oil level gauge insertion through hole.

  (8) The first control valve and the second control valve include a temperature-sensitive deformation portion that deforms according to the temperature of the oil, and a valve body that moves according to the deformation state of the temperature-sensitive deformation portion. The valve may be opened at a temperature equal to or higher than a predetermined valve opening temperature.

  In such a configuration, at the end of the warm-up operation, the temperature-sensitive deformation portion of the first control valve is deformed by the temperature rise of the oil in the main storage chamber. Thereby, the said valve body in the said 1st control valve moves, and the said 1st control valve opens. By opening the first control valve, as described above, the bottom of the main storage chamber and the reservoir chamber communicate with each other with a relatively small flow path resistance.

  Moreover, the temperature-sensitive deformation part in the second control valve is deformed by the temperature rise of the reflux oil stored in the vicinity of the second control valve in the reflux oil storage part. Thereby, the said valve body in the said 2nd control valve moves, and the said 2nd control valve opens. By opening the second control valve, as described above, the upper part of the reservoir chamber and the return oil reservoir are communicated with a relatively small flow path resistance, so that the second oil in the return oil reservoir is increased. The reflux oil stored near the control valve flows into the reservoir chamber. The oil stored in the oil pan is actively circulated by opening the second control valve and inflowing the reflux oil from the reflux oil chamber to the upper portion of the reservoir chamber.

  According to such a configuration, the oil storage device in which the oil stored in the oil pan can be used as evenly as possible can be realized with a simpler device configuration.

  (9) The first control valve may be configured to open at a valve opening temperature lower than a valve opening temperature of the second control valve.

  In such a configuration, when the warm-up operation ends, first, the first control valve is opened. By opening the first control valve, the bottom of the main storage chamber and the reservoir chamber communicate with each other with a relatively small flow resistance. As a result, the oil stored in the reservoir chamber flows relatively easily into the main storage chamber, is sucked in by the suction port of the oil strainer, and can be supplied to the lubricated mechanism. .

  Subsequently, the second control valve is opened. By opening the second control valve, the upper part of the reservoir chamber and the reflux oil reservoir are communicated with each other with a relatively small flow path resistance. Thereby, the recirculation oil stored in the recirculation oil storage part during the warm-up operation flows into the reservoir chamber. Due to the inflow of the reflux oil into the reservoir chamber, the difference in oil level between the reservoir chamber and the main reservoir chamber increases. Due to the differential pressure between the reservoir chamber and the main storage chamber due to the difference in oil level, the oil stored in the reservoir chamber flows into the main storage chamber vigorously.

  According to such a configuration, the first control valve is opened before the second control valve, so that the oil stored in the reservoir chamber is more quickly supplied to the main storage chamber. Can be supplied. Thereby, the extreme fall of the oil level in the said main storage chamber can be suppressed as much as possible. That is, the occurrence of a shortage of the amount of oil supplied to the lubrication mechanism can be suppressed as much as possible.

  Hereinafter, embodiments of the present invention (embodiments that the applicant considers best at the time of filing of the present application) will be described with reference to the drawings.

<1. General configuration of engine>
FIG. 1 is a cross-sectional view of a multi-cylinder engine 100 provided with an oil storage device according to an embodiment of the present invention, as viewed from a direction along the engine longitudinal direction (cylinder arrangement direction). .

  The main body portion of the cylinder head 110 as a lubrication mechanism is formed by casting an aluminum alloy into a predetermined shape. A camshaft 111 as a lubricated member is rotatably accommodated in the main body of the cylinder head 110. A cylinder block 120 is joined to the lower end surface of the cylinder head 110.

  The main body of the cylinder block 120 as the lubrication mechanism is formed by casting an aluminum alloy into a predetermined shape. A cylinder liner 121 having a substantially cylindrical shape as a member to be lubricated is accommodated in the main body of the cylinder block 120. Inside the cylinder liner 121, a piston 122 as a member to be lubricated is accommodated so as to be reciprocally movable in the vertical direction in the figure. A crankshaft 123 as a member to be lubricated is disposed below the piston 122 in parallel with the engine longitudinal direction. The piston 122 and the crankshaft 123 are connected to each other via a connecting rod 124 as a lubricated member.

  A cylinder block lower flange 125 is provided at the lower end of the cylinder block 120. An oil strainer 126 is disposed below the cylinder block lower flange 125. The oil strainer 126 is connected to an oil pump (not shown) provided in the cylinder block 120. A suction port 126a for sucking oil into the oil strainer 126 when the above-described oil pump is operating is formed at the lower end of the oil strainer 126.

  The oil storage device 130 is configured to store oil in a space inside thereof. The oil storage device 130 includes three spaces: a main storage chamber 131, a reservoir chamber 132, and a reflux oil storage unit 133.

  The main storage chamber 131 is a space in which the oil strainer 126 is accommodated, and is formed on the innermost side of the oil storage device 130. The reservoir chamber 132 is a space adjacent to the main storage chamber 131 and is provided so as to surround the lower side and the side of the main storage chamber 131. The recirculation oil storage unit 133 is a space for receiving and temporarily storing a part of recirculation oil that has recirculated from the cylinder head 110 and the cylinder block 120 as the lubricated mechanism by the action of gravity. It is provided above the chamber 132.

<2. Configuration of Oil Storage Device of Embodiment>
The oil storage device 130 of this embodiment includes a first oil pan 140 and a second oil pan 150 that constitute an oil pan of the present invention, and an inner plate 160.

<2-1. First oil pan>
The first oil pan 140 is formed by casting an aluminum alloy into a predetermined shape, like the main body portion of the cylinder block 120. The first oil pan 140 includes a first oil pan tubular portion 141, a first oil pan upper flange 142, and a first oil pan lower flange 143.

  FIG. 2 is a perspective view of the oil storage device 130 according to the present embodiment shown in FIG. 1 as viewed obliquely from above. As shown in FIG. 2, the first oil pan opening 141 a formed below the one end side in the engine longitudinal direction of the first oil pan cylindrical portion 141 formed in a cylindrical shape is a second oil pan opening 141 a. Covered from below by an oil pan 150. That is, the second oil pan 150 is arranged at a position biased toward the one end side in the engine longitudinal direction.

  A slope portion 141b is formed on the other end side of the first oil pan tubular portion 141 in the engine longitudinal direction. The slope portion 141b covers the other end side (the side where the first oil pan opening portion 141a is not provided) in the engine longitudinal direction of the first oil pan tubular portion 141 formed in a tubular shape from below. Is provided. That is, the slope portion 141b is disposed so as to face the cylinder block 120 (see FIG. 1) serving as a lubricated mechanism disposed above.

  The slope portion 141b is formed in a slope shape that becomes lower from the other end side toward the one end side in the engine longitudinal direction. In other words, the slope portion 141b can temporarily receive the reflux oil that has been refluxed by the action of gravity from above, can flow toward the first oil pan opening portion 141a, and flow into the space in the second oil pan 150. It is configured as follows.

  A reflux oil guide weir 141c is formed on the slope portion 141b. The reflux oil guide weir 141c is provided so as to extend upward (project) from the slope portion 141b. The reflux oil guide weir 141c is configured and arranged so that a part of the reflux oil received by the slope portion 141b can be guided toward a predetermined position.

  Here, in this embodiment, the reflux oil guide weir 141c is disposed along the engine longitudinal direction. Further, the reflux oil guide weir 141c is disposed at a position offset from the center in the engine width direction (the direction perpendicular to the engine longitudinal direction and the vertical direction) to the end side. The position of the recirculation oil guide weir 141c in the engine width direction is appropriately set so that the recirculation oil is appropriately distributed to each part as described later.

  Referring to FIG. 1 again, a first oil pan upper flange 142 is formed at the upper end of the first oil pan cylindrical portion 141. The first oil pan upper flange 142 is joined to the cylinder block lower flange 125. A first oil pan lower flange 143 is formed at the lower end of the first oil pan cylindrical portion 141. The second oil pan 150 and the inner plate 160 are fixed to the first oil pan lower flange 143 by bolts.

<2-2. Second oil pan>
The second oil pan 150 constituting the oil storage portion of the present invention is formed in a bathtub shape so as to open toward the upper cylinder block 120. Specifically, the second oil pan 150 includes a second oil pan bottom plate 151, a second oil pan side plate 152, and a second oil pan end flange 153. The second oil pan 150 is integrally formed by pressing a steel plate.

  A second oil pan side plate 152 is provided on the periphery of the second oil pan bottom plate 151 so as to surround the second oil pan bottom plate 151 from the outside. The second oil pan 150 includes the main storage chamber 131 and the reservoir chamber 132 described above, which are spaces in which oil is stored in a space surrounded by the second oil pan bottom plate 151 and the second oil pan side plate 152. Is configured to be formed.

  A drain bolt hole 154 is provided at the lowest position of the second oil pan bottom plate 151. A thread is formed at the inner edge of the drain bolt hole 154 so that the drain bolt 155 can be screwed in. The “minimum position” refers to the lowest position in the direction of gravity when a predetermined device including the engine 100 (for example, an automobile) is placed on a horizontal ground. On the other hand, the highest position in the direction of gravitational action when a predetermined device including the engine 100 (for example, an automobile or the like) is placed on a horizontal ground is hereinafter referred to as “highest position”.

  The second oil pan 150 is configured in such a shape that the oil can flow smoothly and smoothly on the second oil pan bottom plate 151 and the second oil pan side plate 152 toward the drain bolt hole 154 by gravity. ing. That is, by removing the drain bolt 155 from the drain bolt hole 154, the total amount of oil stored in the space inside the second oil pan 150 (particularly the reservoir chamber 132) passes through the drain bolt hole 154 by the action of gravity. It can flow out of the oil storage device 130.

  A second oil pan end flange 153 is formed at the peripheral edge portion on the upper end side of the second oil pan side plate 152. The second oil pan end flange 153 is erected so as to extend outward from the upper end of the second oil pan side plate 152. The second oil pan end flange 153 is joined to the first oil pan lower flange 143.

<2-3. Inner plate>
Inner plate 160 is arranged in a space formed inside first oil pan 140 and second oil pan 150. The inner plate 160 is configured to divide the space into the main storage chamber 131, the reservoir chamber 132, and the reflux oil storage portion 133 described above. Specifically, the inner plate 160 includes an oil pan separator 161 and a reflux oil separator 162.

  The inner plate 160 is integrally formed of a synthetic resin plate material having low thermal conductivity. In this embodiment, the inner plate 160 is composed of a thin plate having a thickness of 2 to 3 mm made of 6 nylon resin having high oil resistance and high heat resistance and reinforced by containing 30% by weight of glass fiber. Yes.

<2-3-1. Oil pan separator>
The oil pan separator 161 includes an oil pan separator bottom plate 161a and an oil pan separator side plate 161b. An oil pan separator side plate 161b is provided on the periphery of the oil pan separator bottom plate 161a so as to surround the oil pan separator bottom plate 161a from the outside.

  The oil pan separator 161 is configured so that the space inside the second oil pan 150 can be divided into a main storage chamber 131 and a reservoir chamber 132. That is, the main storage chamber 131 is formed by a space surrounded by the oil pan separator bottom plate 161a and the oil pan separator side plate 161b. Further, the above-described reservoir chamber 132 is formed by a space below and to the side of the main storage chamber 131 and sandwiched between the second oil pan 150 and the oil pan separator 161.

  The main storage chamber 131 is formed so as to open toward the cylinder block 120. That is, the main reservoir chamber 131 is arranged so that a part of the reflux oil that has fallen from the cylinder block 120 due to the action of gravity can be directly returned to the main reservoir chamber 131 without being temporarily received by the reflux oil reservoir 133. Is formed.

  An oil pan separator end flange 161c is formed at the peripheral edge at the upper end of the oil pan separator side plate 161b. The oil pan separator end flange 161c is erected so as to extend outward from the upper end of the oil pan separator side plate 161b. The oil pan separator end flange 161c is joined to the first oil pan lower flange 143, and is fixed to the first oil pan lower flange 143 by a bolt.

  The oil pan separator side plate 161b is formed such that its upper end is at a height corresponding to a predetermined oil level “F”. Here, the oil level “F” is set to an oil level when an appropriate amount of oil is added to the oil storage amount at the predetermined oil level “L”.

  In the present embodiment, the oil level “L” is set to a height corresponding to the minimum oil level at which oil is satisfactorily sucked from the suction port 126a of the oil strainer 126 even under severe operating conditions. That is, the oil level “L” is set to a minimum oil level before starting so that air is not sucked from the suction port 126a of the oil strainer 126 at the time of starting at an extremely low temperature (for example, about −30 ° C.). .

  Specifically, in the present embodiment, when the oil level in the main storage chamber 131 is “F”, the amount of oil stored in the main storage chamber 131 is set to approximately 2.8 liters. . Further, when the oil level in the main storage chamber 131 is “L”, the amount of oil stored in the main storage chamber 131 is set to about 1.6 liters. Furthermore, the difference in height between the oil level “F” and the oil level “L” is set to approximately 10 to 50 mm.

<2-3-1 (a). Configuration for circulating oil in oil pan>
A first thermostat valve device 163 is provided at the bottom of the oil pan separator side plate 161b so as to penetrate the oil pan separator side plate 161b. The first thermostat valve device 163 is disposed at a position lower than the oil level “L” and higher than the suction port 126 a of the oil strainer 126.

  The first thermostat valve device 163 constitutes an oil communication path in which the AC state of oil between the main reservoir chamber 131 and the reservoir chamber 132 changes according to the oil temperature. That is, the first thermostat valve device 163 is configured to allow the oil to flow from the reservoir chamber 132 to the bottom of the main storage chamber 131 by being opened according to the operating state of the engine 100. Yes.

  FIG. 3 is an enlarged side sectional view of the first thermostat valve device 163 shown in FIG. Here, FIG. 3A shows a valve opening state at a low temperature, and FIG. 3B shows a valve closing state at a high temperature.

  The first thermostat valve device 163 includes a wax 163a as a temperature-sensitive deformation portion whose shape changes according to the temperature of the oil in the main storage chamber 131. The first thermostat valve device 163 is arranged such that the wax 163a as the above-described temperature-sensitive deformation portion is located on the main storage chamber 131 side.

  The wax 163a is sealed inside a metal valve body 163b. The valve body 163b includes a substantially disc-shaped communication passage opening / closing valve 163b1 having a through hole in the center, a substantially cylindrical main body portion 163b2 having a hollow portion in which wax 163a is sealed, and a communication passage opening / closing valve 163b1. And a substantially cylindrical connecting portion 163b3 for connecting the main body portion 163b2.

  The above-described through hole formed in the communication passage opening / closing valve 163b1 is connected to a space inside the cylinder constituting the connection portion 163b3. A rod 163c is disposed inside these through holes and spaces. The rod 163c is disposed so that one end thereof is exposed in the hollow portion in which the wax 163a is sealed. The rod 163c is disposed such that the other end opposite to the one end is exposed from the communication passage opening / closing valve 163b1 to the outside of the valve body 163b. Further, a seal member 163e is inserted into the through hole formed in the communication passage opening / closing valve 163b1. The seal member 163e is configured to suppress leakage of the wax 163a sealed in the valve body 163b to the outside of the valve body 163b.

  The periphery of the main body 163b2 in the valve body 163b is surrounded by a casing 163d that is a substantially cylindrical member made of metal. The housing 163d is formed with a main storage chamber side opening 163d1 as a through hole. The main storage chamber side opening 163d1 is configured to allow communication between the inner space of the housing 163d and the outer space (main storage chamber 131).

  A through hole 163d2 is formed at the end of the housing 163d on the main storage chamber 131 side. The through hole 163d2 is configured such that the main body 163b2 of the valve body 163b can move (slide) on the inner side. A disc-shaped flange portion 163f is formed at the end of the housing 163d on the reservoir chamber 132 side so as to extend outward (vertical direction in the drawing). The flange portion 163f is fixed to the oil pan separator side plate 161b by bolts B and nuts N, so that the first thermostat valve device 163 is mounted on the oil pan separator side plate 161b.

  A reservoir chamber side cover 163g made of a plate-like member exposed to the reservoir chamber 132 side is provided on the reservoir chamber 132 side of the flange portion 163f. The reservoir chamber side cover 163g is formed with a reservoir chamber side opening 163g1 which is a through hole. The other end of the rod 163c is fixed to the reservoir chamber side cover 163g. When the reservoir chamber side cover 163g and the communication path on / off valve 163b1 come into contact with each other, the communication path on / off valve 163b1 allows communication between the space inside the housing 163d and the space inside the reservoir chamber side cover 163g. The shape of the reservoir chamber side cover 163g (and the communication passage opening / closing valve 163b1) is set so as to be shut off.

  A coil spring 163h is disposed in the space inside the housing 163d so as to surround the periphery of the valve body 163b. The coil spring 163h is arranged so that one end thereof is in contact with the communication passage opening / closing valve 163b1 and the other end is in contact with the one end side of the housing 163d.

  The first thermostat valve device 163 having the above-described structure is illustrated when the temperature of the oil around the valve body 163b in which the wax 163a is sealed is lower than a predetermined valve opening temperature (approximately 60 ° C.). 3 (A), the reservoir chamber side cover 163g and the communication passage opening / closing valve 163b1 are in contact with each other so that the communication between the main storage chamber 131 and the reservoir chamber 132 is blocked (the valve closed state). ). In addition, when the temperature of the oil around the valve body 163b is equal to or higher than the valve opening temperature, the first thermostat valve device 163 has the valve body 163b as the main storage chamber as shown in FIG. By moving to the 131 side (right direction in the figure), the main storage chamber 131 and the reservoir chamber 132 are in communication with each other (the valve open state).

Further, the first thermostat valve device 163 is configured such that the valve opening rate (the ratio of the current flow path cross-sectional area to the maximum flow cross-sectional area in the oil communication path) increases as the temperature rises. That is, the valve body 163b is positioned at a predetermined position where the force by which the valve body 163b is pushed out to the main storage chamber 131 side by the expansion of the wax 163a and the pressing force by the coil spring 163h balances, The first thermostat valve device 163 is configured so that the valve opening rate changes according to the oil temperature. The first thermostat valve device 163 is configured so that the maximum flow path cross-sectional area is approximately 8 cm ² .

<2-3-1 (b). Drain hole and float valve>
Referring to FIG. 1 again, a drain hole 161d is formed in the oil pan separator bottom plate 161a. The drain hole 161 d is provided at the lowest position of the oil pan separator bottom plate 161 a, that is, at the lowest position of the main storage chamber 131 and in the vicinity of the oil strainer 126. The drain hole 161d has a sufficient size (for example, a diameter of about 20 mm) that can flow out to the outside of the main storage chamber 131 (reservoir chamber 132 side) even if the oil has a low viscosity (for example, about 0 ° C.). A circular shape).

  A float valve 164 is mounted in the drain hole 161d formed in the bottom of the oil pan separator 161. The float valve 164 is configured to open and close the drain hole 161d in accordance with the oil level in the main storage chamber 131.

  FIG. 4 is an enlarged side sectional view of the periphery of the float valve 164 shown in FIG. Here, FIG. 4A shows a state in which the drain hole 161d is closed by the oil level in the main storage chamber 131 being high and the float valve 164 rising. FIG. 4B shows a state in which the drain hole 161d is opened when the oil level in the main storage chamber 131 is low and the float valve 164 is lowered.

  Referring to FIG. 4, the float valve 164 includes a valve body 164a, a float 164b, and a connection bar 164c.

  The valve body 164a is disposed on the reservoir chamber 132 side (below the oil pan separator bottom plate 161a). The valve body 164a is configured such that the drain hole 161d can be closed from below by contacting the drain hole facing surface 164a1 on the upper surface thereof with the opening edge of the drain hole 161d.

  The float 164b is disposed in the main storage chamber 131 (above the oil pan separator bottom plate 161a). That is, the float 164b is disposed so as to face the valve body 164a with the drain hole 161d interposed therebetween. The float 164b is formed of a material and / or structure that can be lifted by buoyancy in oil.

  The connection bar 164c is a rod-like member that connects the valve body 164a and the float 164b, and is disposed substantially in the vertical direction.

  In the present embodiment, the above-described drain hole facing surface 164a1, which is the upper surface of the valve body 164a and faces the drain hole 161d, is formed in a spherical surface convex outward (upper side). When a sufficient amount of oil is stored in the main storage chamber 131 and the float valve 164 is in the raised position shown in FIG. 4A, this is indicated by a two-dot chain line in the figure. Thus, even when the float valve 164 is inclined, the float valve 164 is configured such that the drain hole facing surface 164a1 is in good contact with the opening end (drain opening end portion 161d1) of the drain hole 161d.

  In the present embodiment, the drain opening end portion 161d1 is formed in a curved surface shape. The drain opening end portion 161d1 is a surface facing the drain hole facing surface 164a1 of the valve body 164a, and is formed so as to be in close contact with the drain hole facing surface 164a1 having a spherical shape.

  Referring to FIG. 1 again, the float valve 164 closes the drain hole 161d from below by rising by buoyancy when the oil level in the main storage chamber 131 becomes equal to or higher than a predetermined float lowering start level. Configured to get. In addition, the float valve 164 descends when the oil level in the main storage chamber 131 is lower than the float lowering start level and the amount of oil in the main storage chamber 131 is insufficient, so that the drain valve The hole 161d is opened so that oil at the bottom of the reservoir chamber 132 can flow into the main reservoir chamber 131. Here, in the present embodiment, the float lowering start level is set at the center of the first thermostat valve device 163 in the height direction.

<2-3-1 (c). Lubrication valve>
A flat portion 161e is formed in a portion of the oil pan separator side plate 161b adjacent to the reflux oil separator 162. The flat portion 161e is provided such that the normal line on the outer surface (surface on the reservoir chamber 132 side) faces upward (in contrast, the first thermostat valve device 163 on the oil pan separator side plate 161b is mounted. The portion is provided so that the normal on the outer surface faces downward.)

  That is, as shown in FIG. 1, the flat portion 161 e is formed so that the main storage chamber 131 can be expanded toward the reservoir chamber 132 located below the reflux oil separator 162. The flat portion 161e is arranged to constitute a top plate of the main storage chamber 131 protruding toward the reservoir chamber 132 located below the reflux oil separator 162. The flat portion 161e is provided at a height corresponding to the oil level “L”.

  The flat portion 161e is formed with an oil supply hole 161f as a through hole. The oil injection hole 161f is formed in a sufficiently large size (for example, a circle having a diameter of about 40 mm) that can pass even a low viscosity (for example, about 0 ° C.) high viscosity oil.

  The flat portion 161e is provided with an oil supply valve 165 configured to open and close the oil supply hole 161f in accordance with the oil level in the oil storage device 130. The oil supply valve 165 is configured to operate according to the difference between the oil level in the main storage chamber 131 and the oil level in the reservoir chamber 132. The oil supply valve 165 is configured to permit only the oil outflow from the main storage chamber 131 to the reservoir chamber 132 substantially.

  FIG. 5 is an enlarged cross-sectional view of the periphery of the oil supply valve 165 shown in FIG. Here, FIG. 5A shows a state in which the oil supply hole 161f is closed as the oil supply valve 165 descends. FIG. 5B shows a state in which the oil supply hole 161f is opened as the oil supply valve 165 rises.

  Referring to FIG. 5, the oil supply valve 165 includes an oil supply hole closing valve body 165a, a guide pin 165b, and a stopper 165c.

  The oil supply hole closing valve body 165a is configured to be able to close the oil supply hole 161f from above the flat part 161e by descending due to its own weight in the oil. In the present embodiment, the oil injection hole closing valve body 165a is made of a material having a specific gravity (preferably about 1.2 times to about 2 times) slightly higher than the specific gravity of oil (0.85 to 0.98). Has been. Specifically, the oil filling hole closing valve body 165a in the present embodiment is made of 6 nylon resin (specific gravity 1.37) which is the same material as the oil pan separator 161 and is reinforced by containing 30% by weight of glass fiber. Degree).

  An oil supply valve surface 165a1 that is a lower surface of the outer edge portion of the oil supply hole closing valve body 165a and is opposed to the oil supply hole 161f is formed in a spherical shape. The oil hole opening end 161f1, which is the inner edge of the oil hole 161f, is formed in a predetermined shape so that the inner edge of the oil hole 161f is in line contact with the oil valve surface 165a1. Specifically, as shown in FIG. 5, in the present embodiment, the shape of the oil hole opening end 161f1 is formed at an acute angle in a cross-sectional view. Further, the upper surface of the inner edge portion of the oil supply hole 161f is formed in a conical depression shape.

  A guide pin 165b is provided so as to protrude downward from the oil supply hole closing valve body 165a. The guide pin 165b is supported by a tongue-shaped oil supply valve guide 161g provided so as to protrude from the lower surface of the flat portion 161e. That is, the oil supply valve guide 161g is configured to support the oil supply valve 165 and to guide the vertical movement of the oil supply valve 165 in accordance with a change in the oil level.

  A guide hole 161g1 which is a through hole is formed in the oil supply valve guide 161g. A guide pin 165b is inserted through the guide hole 161g1. A stopper 165c having an outer diameter larger than the inner diameter of the guide hole 161g1 is formed at the lower end of the guide pin 165b. The stopper 165c is configured to prevent the oil supply valve 165 from being detached from the flat portion 161e and to restrict the rising position of the oil supply valve 165 (the oil supply hole closing valve body 165a).

<2-3-2. Reflux oil separator>
Referring back to FIG. 1, the reflux oil separator 162 is provided so as to define the upper end of the reservoir chamber 132. The reflux oil separator 162 is provided so as to partition the reservoir chamber 132 from the reflux oil storage portion 133 located above the reservoir chamber 132.

  That is, the reflux oil storage part 133 is formed on the upper side of the reflux oil separator 162. This recirculation oil storage part 133 is the remaining part of the recirculation oil that recirculates from the cylinder head 110 and the cylinder block 120 toward the oil storage device 130 except for the part directly flowing into the main storage chamber 131 (particularly It is configured to be able to store a predetermined amount (during warm-up operation).

  The reflux oil separator 162 in the present embodiment is made of a synthetic resin made of the same material as the oil pan separator 161 and is formed integrally with the oil pan separator 161. That is, one end of the reflux oil separator 162 is coupled to the upper end of the oil pan separator side plate 161b. The other end of the reflux oil separator 162 is joined to the first oil pan lower flange 143 and fixed to the first oil pan lower flange 143 by a bolt.

  In this embodiment, the reflux oil separator 162 is disposed at a diagonal position (the farthest position) in the engine width direction with respect to the oil pan separator side plate 161b provided with the first thermostat valve device 163.

  The horizontal partition plate 162a forming the main body of the reflux oil separator 162 is disposed substantially horizontally at a height corresponding to the oil level “F”. The horizontal partition plate 162a is provided with a second thermostat valve device 166. That is, in the present embodiment, the second thermostat valve device 166 is disposed at a diagonal position in the engine width direction with respect to the first thermostat valve device 163. The second thermostat valve device 166 is disposed so as to penetrate through the lowest position of the second thermostat fixing recess 162a1 formed so as to protrude toward the reservoir chamber 132 located on the lower side.

  The second thermostat valve device 166 has the same configuration as the first thermostat valve device 163 described above, and is configured to be able to open and close according to the temperature of the oil in the reflux oil storage unit 133. In the present embodiment, the second thermostat valve device 166 is configured to open later than the first thermostat valve device 163. That is, in the present embodiment, the second thermostat valve device 166 is configured such that the valve opening temperature is slightly higher (approximately several degrees C.) than the valve opening temperature in the first thermostat valve device 163. .

  A reflux oil guide weir 162b is formed so as to extend upward from the horizontal partition plate 162a (so as to protrude). The reflux oil guiding weir 162b is configured to guide the reflux oil received by the reflux oil separator 162 (horizontal partition plate 162a) toward the second thermostat valve device 166 (second thermostat fixing recess 162a1). Has been.

  Referring to FIG. 2, the reflux oil guide weir 162b is configured to receive the reflux oil guided by the reflux oil guide weir 141c. Further, when viewed through the engine width direction, the reflux oil guide weir 162b (and the reflux) is arranged such that one end portion in the longitudinal direction of the reflux oil guide weir 162b and one end portion in the longitudinal direction of the reflux oil guide weir 141c overlap. An oil guide weir 141c) is constructed and arranged.

  Here, in the present embodiment, the reflux oil guiding weir 162b is disposed substantially parallel to the engine longitudinal direction. Further, the reflux oil guide weir 162b is offset from the center in the engine width direction toward the end, and is disposed so as to overlap the second thermostat fixing recess 162a1. Further, the reflux oil guide weir 162b is divided into two in the engine longitudinal direction with the second thermostat fixing recess 162a1 interposed therebetween. A gap is formed in the engine width direction between the one end of the reflux oil guide weir 162b and the one end of the reflux oil guide weir 141c.

  Such a configuration / arrangement of the reflux oil guide weir 162b (and the reflux oil guide weir 141c) is appropriately set so that appropriate distribution of the reflux oil to each part as described later is performed.

  Referring to FIG. 1 again, the horizontal partition plate 162a is provided with an oil level gauge through hole 162c. The oil level gauge through hole 162c is formed so that a rod-like oil level gauge 171 can be inserted therethrough.

  FIG. 6 is an enlarged sectional view of the horizontal partition plate 162a shown in FIG. Referring to FIGS. 1 and 6, the oil level gauge through hole 162 c is formed at the highest position in the reservoir chamber 132. An air discharge guide surface 162c1 that is a curved surface that allows the air in the reservoir chamber 132 to smoothly escape upward is formed at the open end of the oil level gauge through-hole 162c on the reservoir chamber 132 side.

  An oil level gauge guide cylinder 162d made of a cylindrical member is provided so as to protrude upward from the horizontal partition plate 162a so as to surround the oil level gauge through hole 162c from the outside. The oil level gauge guide tube 162d is configured to support the oil level gauge 171 by accommodating the oil level gauge 171 made of a rod-shaped member.

  The lower end of the oil level gauge guide tube 162 d is configured not to protrude into the reservoir chamber 132. That is, the lower end of the oil level gauge guide tube 162d is configured by the air discharge guide surface 162c1 described above. In other words, the air discharge guide surface 162c1 described above is a curved surface that forms the lower end portion of the inner surface of the oil level gauge guide tube 162d, and is formed so that the opening area widens downward.

  The oil level gauge guide tube 162d includes a cylindrical support tube main body portion 162d1 and a gauge guide portion 162d2 connected to the upper end of the support tube main body portion 162d1. The gauge guide portion 162d2 is formed in a trumpet shape so that the opening area increases as it goes upward. That is, the gauge guide surface 162d3 which is the inner surface of the gauge guide portion 162d2 is configured such that the tip end portion of the oil level gauge 171 moving toward the oil level gauge through hole 162c is smoothly accommodated in the support cylinder main body portion 162d1. The oil level gauge 171 is formed in a substantially conical surface so that the mounting of the oil level gauge 171 can be guided.

  The oil level gauge guide tube 162d is formed such that its upper end is higher than the upper end of the reflux oil guiding weir 162b. Further, the lower end portion of the oil level gauge guide tube 162d is formed integrally with the horizontal partition plate 162a. That is, the lower end portion of the oil level gauge guide tube 162d is liquid-tightly connected to a portion around the oil level gauge through hole 162c in the reflux oil separator 162. Further, between the oil level gauge through hole 162c and the oil level gauge guide tube 162d and the oil level gauge 171, it is difficult to pass high-viscosity oil at a low temperature during the warm-up operation. A gap is formed so that the low-viscosity oil can easily pass through at a relatively high temperature (for example, 60 ° C. or higher) after the operation is completed.

  That is, when the second thermostat valve device 166 is in the closed state, the oil level gauge guide tube 162d is such that the recirculated oil stored in the recirculated oil reservoir 133 is the upper end of the oil level gauge guide tube 162d. And the oil level gauge guide tube 162d from the lower end thereof and the oil level gauge through hole 162c to flow into the reservoir chamber 132 as much as possible. .

  The horizontal partition plate 162a is provided with an air discharge hole 162e for drawing air upward from the reservoir chamber 132. The air discharge hole 162e is formed as a circular through hole having a diameter of about 20 mm. An air discharge hole surrounding weir 162f is provided in the vicinity of the air discharge hole 162e. The air discharge hole surrounding weir 162f is formed to surround the air discharge hole 162e as shown in FIG.

  Here, referring again to FIG. 1, in this embodiment, the recirculation oil flows into the main reservoir chamber 131, the reservoir chamber 132, and the recirculation in all operating states of the first oil pan 140, the inner plate 160 and the engine 100. The oil reservoir 133 is appropriately distributed and formed in an appropriate shape so that the oil circulation state can be appropriately set in the oil reservoir 130 according to the engine operating state.

  That is, during the warm-up operation, an appropriate amount of the reflux oil is stored in the reflux oil storage unit 133, and an appropriate amount of the reflux oil is directly returned into the main storage chamber 131, so that In order to prevent a shortage of oil in the main storage chamber 131 at the time of cold start and to sufficiently promote a warm-up operation by raising the temperature of the oil in the main storage chamber 131, the reflux oil guide weir 141c, the horizontal partition plate 162a, a recirculation oil guide weir 162b, an oil level gauge through hole 162c, an oil level gauge guide tube 162d, an air discharge hole 162e, and an air discharge hole surrounding weir 162f are formed.

  Specifically, in the oil storage device 130 of the present embodiment, approximately 30 to 60% of the reflux oil directly returns to the main storage chamber 131, and approximately 40 to 70% of the reflux oil returns to the main storage chamber 131. The oil storage unit 133 is configured to be received once.

<3. Explanation of Operation of Apparatus Configuration of First Embodiment>
Hereinafter, operation | movement of the engine 100 provided with the oil storage apparatus 130 of this embodiment is demonstrated, referring each drawing.

  First, referring to FIG. 1, when the engine 100 according to this embodiment is started, the crankshaft 123 is rotationally driven. The rotation of the crankshaft 123 activates an oil pump (not shown). By the operation of the oil pump, the oil is sucked out from the bottom of the main storage chamber 131 through the suction port 126a of the oil strainer 126 arranged at the bottom of the main storage chamber 131. This oil is supplied to the lubricated members such as the piston 122 and the crankshaft 123.

  The oil supplied to the members to be lubricated such as the piston 122 and the crankshaft 123 exerts a lubricating action on the members to be lubricated and absorbs heat such as frictional heat from the members to be lubricated. Thereafter, the oil flows back toward the oil storage device 130 by the action of gravity.

  A part of the reflux oil returns directly to the main storage chamber 131 through an opening formed by the upper end of the oil pan separator side plate 161b. The oil that recirculates directly to the main storage chamber 131 travels along the inner wall surface of the cylinder block 120 or falls freely in the space inside the cylinder block 120, and directly from the opening to the main storage chamber 131. Flow into.

  Referring to FIGS. 1 and 2, on the other hand, the remaining part of the reflux oil except for a part that has directly returned to the main storage chamber 131 is temporarily received by the slope part 141 b and the reflux oil separator 162. The reflux oil received by the slope portion 141b flows toward the first oil pan opening portion 141a due to the inclination of the upper surface of the slope portion 141b.

  Here, in the configuration of the present embodiment, a part of the reflux oil received by the slope portion 141b is guided toward the reflux oil guide weir 162b by the reflux oil guide weir 141c. The reflux oil guided by the reflux oil guide weir 141c is further guided to the second thermostat fixing recess 162a1 by the reflux oil guide weir 162b. And the oil induced | guided | derived by this return oil induction weir 162b is stored in the position of the vicinity of the 2nd thermostat valve apparatus 166 in the return oil storage part 133. FIG.

  A part of the reflux oil on the reflux oil separator 162 returns to the main storage chamber 131 through an opening formed by the upper end of the oil pan separator side plate 161b.

  Further, a part of the reflux oil received by the slope portion 141b and the reflux oil separator 162 flows toward the air discharge hole 162e. However, the air discharge hole surrounding weir 162f surrounding the air discharge hole 162e suppresses the inflow of the reflux oil into the air discharge hole 162e (inflow into the reservoir chamber 132).

<3-1. During warm-up>
Here, during the warm-up operation, the temperature of the oil in the main storage chamber 131 is lower than the above-described valve opening temperature in the first thermostat valve device 163.

  In this case, referring to FIG. 3A, the wax 163a is in a contracted state. Then, the communication path on-off valve 163b1 is urged to the left in the drawing by the elastic force of the coil spring 163h, so that the rod 163c is pushed into the hollow portion in which the wax 163a is sealed. Thereby, the reservoir chamber side cover 163g and the communication passage opening / closing valve 163b1 come into contact with each other. In this way, the first thermostat valve device 163 constituting the oil communication path between the main storage chamber 131 and the reservoir chamber 132 is closed.

  Referring to FIG. 1 again, when the oil level in the main storage chamber 131 is not extremely lowered, the float valve 164 is raised by buoyancy in the oil in the main storage chamber 131. Therefore, the drain hole 161d is closed by the valve body 164a (drain hole facing surface 164a1) of the float valve 164.

  In this way, during the warm-up operation, the first thermostat valve device 163 and the float valve 164 are closed to prevent the low temperature oil in the reservoir chamber 132 (the bottom thereof) from flowing into the bottom of the main storage chamber 131. Is done. Thereby, the amount of oil that can be supplied to the cylinder head 110 or the cylinder block 120, that is, the amount of oil that circulates between the cylinder head 110 or the cylinder block 120 and the oil storage device 130 is stored in the main storage chamber 131. Limited to the amount that has been. The advance of the warm-up operation is promoted by the restriction of the oil supply / circulation amount and the temperature rise of the oil in the main storage chamber 131 due to the inflow of the reflux oil.

  Further, during the warm-up operation, only a small amount of the reflux oil is stored in the reflux oil storage unit 133, and the temperature thereof is also relatively low. Accordingly, the second thermostat valve device 166 is also closed. Further, the inflow of the recirculated oil received by the recirculated oil reservoir 133 into the reservoir chamber 132 surrounds the tall oil level gauge guide tube 162d and the air discharge hole 162e that cover the oil level gauge through hole 162c. It is limited by the air discharge hole surrounding weir 162f. However, a part of the reflux oil on the reflux oil separator 162 returns to the main storage chamber 131 through the opening formed by the upper end of the oil pan separator side plate 161b as described above.

  The main storage chamber 131 and the reservoir during the warm-up operation are limited by the restriction of the inflow of the reflux oil into the reservoir chamber 132 and the restriction of the oil inflow from the reservoir chamber 132 to the main storage chamber 131 as described above. A difference in oil level occurs between the chamber 132 and the chamber 132.

  Further, the recirculation in the recirculation oil reservoir 133 is performed by closing the second thermostat valve device 166 and guiding the recirculation oil to the vicinity of the second thermostat valve device 166 by the recirculation oil guide weir 141c and the recirculation oil guide weir 162b. Oil storage will gradually increase.

<3-2. End of warm-up operation>
When the temperature of the oil in the main storage chamber 131 in the vicinity of the first thermostat valve device 163 reaches the valve opening temperature, the warm-up operation ends. That is, the first thermostat valve device 163 constituting the oil communication path between the main storage chamber 131 and the reservoir chamber 132 is opened.

  Specifically, as shown in FIG. 3B, the wax 163a is melted by the temperature rise of the oil in the vicinity of the first thermostat valve device 163 reaching the valve opening temperature. By melting the wax 163a, the volume of the wax 163a expands, and the one end of the rod 163c is pushed out from the inside of the cavity where the wax 163a is sealed. Then, the valve body 163b is pushed out to the main storage chamber 131 side against the pressing force of the coil spring 163h. As a result, a gap is generated between the reservoir chamber side cover 163g and the communication passage opening / closing valve 163b1. By forming this gap, the oil communication path passing through the inside of the housing 163d is formed between the main storage chamber side opening 163d1 and the reservoir chamber side opening 163g1.

  Referring to FIG. 1 again, when the oil communication path between the main reservoir chamber 131 and the reservoir chamber 132 is opened by opening the first thermostat valve device 163, the pressure difference due to the difference in oil level described above causes The oil in the reservoir chamber 132 surely flows into the bottom of the main reservoir chamber 131. In the first thermostat valve device 163 of the present embodiment, the valve opening rate increases as the temperature rises. Thereby, the alternating current state of the oil in the oil communication path changes according to the temperature of the oil.

  Thereafter, the second thermostat valve device 166 is opened. As a result, the reflux oil stored in the reflux oil reservoir 133 flows into the upper portion of the reservoir chamber 132 with a force of gravity. Due to the inflow of the reflux oil into the upper portion of the reservoir chamber 132, a difference in oil level between the main reservoir chamber 131 and the reservoir chamber 132 occurs instantaneously, and the oil in the reservoir chamber 132 flows into the bottom of the main reservoir chamber 131. To do.

<3-3. When the oil level in the main storage chamber suddenly drops>
During the operation of the engine 100, the oil level in the main storage chamber 131 may suddenly decrease for some reason.

  For example, at the time of cold start in a cryogenic environment, when the oil storage amount at the time of start is near the oil level “L”, a large amount of oil in the main storage chamber 131 is sucked out immediately after the start. On the other hand, low temperature and high viscosity oil does not readily return to the main storage chamber 131.

  In such a case, the oil level in the main storage chamber 131 may be lower than the float lowering start level of the float valve 164. At this time, as shown in FIG. 4B, the float valve 164 descends and the drain hole 161d is opened. By opening the drain hole 161d, the bottom of the main storage chamber 131 and the bottom of the reservoir chamber 132 communicate with each other through the drain hole 161d.

  Referring to FIG. 1 again, the drain hole 161d is formed in the vicinity of the suction port 126a in the oil strainer 126 as described above. Therefore, the negative pressure generated at the suction port 126a sufficiently reaches the drain hole 161d. As a result, the oil at the bottom of the reservoir chamber 132 flows into the bottom of the main storage chamber 131 via the drain hole 161 d and is supplied to the suction port 126 a of the oil strainer 126.

  Thereafter, a relatively large amount of the reflux oil returns to the oil storage device 130. In this case, during the warm-up operation, since the temperature of the reflux oil is relatively low, the second thermostat valve device 166 is in a closed state. Further, the flow of the recirculated oil into the reservoir chamber 132 is restricted by the oil level gauge guide tube 162d and the air discharge hole surrounding weir 162f.

  Therefore, most of the reflux oil overflows from the reflux oil storage part 133 and returns to the main storage chamber 131. As a result, the oil level in the main storage chamber 131 becomes higher than the float lowering start level of the float valve 164, and the float valve 164 rises to the raised position as shown in FIG. . A part of the reflux oil can flow into the reservoir chamber 132 through the air discharge hole 162e.

  In particular, the oil level in the main storage chamber 131 may be higher than that in the reservoir chamber 132 because a large amount of the reflux oil returns to the oil storage device 130. When such a large amount of the recirculated oil returns to the main storage chamber 131 and the oil level in the main storage chamber 131 becomes higher than the reservoir chamber 132, the oil supply valve 165 is opened. (See FIG. 5B).

  That is, the oil supply hole 161f is opened by pushing up the oil supply hole closing valve body 165a (see FIG. 5) by the differential pressure generated by the difference in oil level between the main storage chamber 131 and the reservoir chamber 132. As a result, the oil flows out from the main storage chamber 131 to the reservoir chamber 132 through the oil supply hole 161f.

  In this case, the relatively low temperature oil at the bottom of the main storage chamber 131 is caused by the differential pressure between the main storage chamber 131 and the reservoir chamber 132 caused by the concentrated return of the reflux oil to the upper portion of the main storage chamber 131. Preferentially, the oil flows out into the reservoir chamber 132 through the oil supply hole 161f. That is, the relatively low temperature oil in the main storage chamber 131 flows into the reservoir chamber 132, and the relatively high temperature reflux oil remains preferentially in the main storage chamber 131.

  The oil that has flowed into the reservoir chamber 132 is also relatively hotter than the oil stored in the reservoir chamber 132 from the very beginning of the cryogenic start. Therefore, the temperature of the oil in the reservoir chamber 132 slightly rises due to the oil flowing into the reservoir chamber 132 through the oil supply hole 161f.

  As described above, the circulation of the oil through the oil supply hole 161f is caused by the concentrated recirculation of the recirculated oil to the main storage chamber 131, so that the progress of the warm-up operation can be further promoted.

  Thereafter, when the oil level is averaged to some extent between the main reservoir chamber 131 and the reservoir chamber 132, the oil supply valve 165 is closed (see FIG. 5A).

<3-4. When draining oil>
Referring to FIG. 1 again, when the drain bolt 155 is removed and the drain bolt hole 154 is opened, the oil in the reservoir chamber 132 is discharged to the outside through the drain bolt hole 154. As a result, the oil level in the reservoir chamber 132 decreases.

  Here, in many cases, the oil change operation is performed for a while after the engine is stopped. Therefore, the first thermostat valve device 163 is in a closed state when the oil is discharged in the oil replacement operation. A large amount of oil remains in the main storage chamber 131. Therefore, the float valve 164 is in the raised position, and the drain hole 161d in the oil pan separator 161 is closed.

  Therefore, at the initial stage of oil discharge, the communication between the main storage chamber 131 and the reservoir chamber 132 through the drain hole 161d and the first thermostat valve device 163 is substantially blocked. Thereby, as the oil level in the reservoir chamber 132 decreases due to oil discharge, the difference in oil level between the main reservoir chamber 131 and the reservoir chamber 132 so that the main reservoir chamber 131 becomes higher is It occurs slightly and instantaneously.

  When such a difference in oil level occurs, a differential pressure between the main storage chamber 131 and the reservoir chamber 132 is generated. As shown in FIG. 5B, the oil pressure hole closing valve body 165a is pushed up by this differential pressure. Thereby, the oil supply hole 161f is opened, and oil is discharged from the main storage chamber 131 to the reservoir chamber 132 through the oil supply hole 161f.

  In this manner, the oil is quickly discharged from the main reservoir chamber 131 and the reservoir chamber 132 to the outside while the oil level of the main reservoir chamber 131 and the reservoir chamber 132 is adjusted from the beginning of the oil discharge.

  When the oil level in the main storage chamber 131 decreases and becomes lower than the float lowering start level, the float valve 164 descends. Alternatively, when the oil in the reservoir chamber 132 is rapidly discharged and a large oil level difference occurs between the main reservoir chamber 131 and the reservoir chamber 132, the float valve 164 is lowered. As a result, the drain hole 161d is opened, and oil is discharged from the main storage chamber 131 to the reservoir chamber 132 through the drain hole 161d.

<3-5. During oil injection>
After all the oil in the oil reservoir 130 is discharged to the outside through the drain bolt hole 154, the drain bolt hole 154 is screwed into the drain bolt hole 154, thereby closing the drain bolt hole 154. . In this state, fresh oil is injected from above the oil storage device 130. This fresh oil first flows intensively into the main storage chamber 131.

  However, at the initial stage of oil injection, the float valve 164 is lowered and the drain hole 161d is opened. Therefore, the oil injected into the main storage chamber 131 also flows into the reservoir chamber 132 through the drain hole 161d. Thus, at the initial stage of oil injection, fresh oil is injected into both the main reservoir chamber 131 and the reservoir chamber 132.

  When the oil level in the main storage chamber 131 becomes higher than the float lowering start level of the float valve 164, the drain hole 161d is closed by the float valve 164. In this case, fresh injected oil is intensively injected into the main storage chamber 131.

  However, when the oil level in the main storage chamber 131 becomes higher than the flat portion 161e, the oil supply valve 165 is pushed up by the oil in the main storage chamber 131. That is, referring to FIG. 1 and FIG. 5, the oil supply hole 161f is opened by pushing up the oil supply hole closing valve body 165a. Thereby, the oil injected into the main storage chamber 131 is also injected into the reservoir chamber 132 through the oil supply hole 161f.

  The specific gravity of the material constituting the oil injection hole closing valve body 165a is only slightly higher than that of oil. Therefore, while the injection of oil into the main storage chamber 131 continues, the oil supply hole closing valve body 165a is maintained in a floating state by the momentum of the oil flowing upward through the oil supply hole 161f.

  When the injection of oil into the main storage chamber 131 is completed, the oil supply hole closing valve body 165a is lowered by its own weight, so that the oil supply hole 161f is closed.

<4. Action and Effect by Apparatus Configuration of First Embodiment>
Referring to FIGS. 1 and 2, in the configuration of the present embodiment, a reflux oil guide weir 141 c is provided in a slope portion 141 b disposed to face the cylinder block 120 so that the reflux oil can be received once. ing. Further, a reflux oil guide weir 162b configured to guide the reflux oil toward the second thermostat valve device 166 is provided so as to protrude upward from the reflux oil separator 162. Then, when viewed through the engine width direction, the reflux oil guide weir 162b and the reflux oil are arranged so that one end portion in the longitudinal direction of the reflux oil guide weir 162b and one end portion in the longitudinal direction of the reflux oil guide weir 141c overlap. A guide weir 141c is constructed and arranged.

  Therefore, according to the configuration of the present embodiment, the recirculated oil that has recirculated to the oil storage device 130 during the warm-up operation is caused to flow into the second thermostat fixing recess 162a1 by the recirculated oil guide weir 141c and the recirculated oil guide weir 162b. Is well guided towards. Thus, the recirculation oil in the vicinity of the second thermostat valve device 166 during the warming-up operation is sufficiently advanced so that the inflow of oil from the reservoir chamber 132 to the main storage chamber 131 can be favorably promoted at the end of the warming-up operation. A sufficient amount of storage can be secured.

  As described above, according to the configuration of the present embodiment, the oil between the reservoir chamber 132 and the main storage chamber 131 can be reduced without diminishing the effect of the two-tank oil pan structure that promotes the progress of the warm-up operation. Exchanges can be made actively. That is, after the warm-up operation is completed, the oil stored in the oil storage device 130 is used as evenly as possible. Thereby, the problem of the prior art that only a limited amount of oil in the main storage chamber 131 is intensively used and the oil deteriorates at an early stage can be solved, and deterioration of the durability of the oil can be suppressed. .

  Referring to FIGS. 2 and 6, in the configuration of the present embodiment, the oil level gauge guide tube 162 d is formed higher than the reflux oil guide weir 162 b. An air discharge hole surrounding weir 162f is formed so as to surround the air discharge hole 162e.

  Therefore, the outflow of the recirculation oil stored in the recirculation oil reservoir 133 to the reservoir chamber 132 through the oil level gauge through hole 162c and the air discharge hole 162e is effectively suppressed. In particular, even when the oil level fluctuates during turning, uphill / downhill acceleration, or acceleration / deceleration of a vehicle equipped with the engine 100, the outflow of the recirculation oil from the recirculation oil reservoir 133 to the reservoir chamber 132 is suppressed. Is done. On the other hand, the oil level gauge guide tube 162d and the air discharge hole surrounding weir 162f do not hinder the flow of the reflux oil into the main storage chamber 131 (see FIG. 1).

  Therefore, according to the configuration of the present embodiment, the amount of the recirculated oil stored in the vicinity of the second thermostat valve device 166 during the warm-up operation can be ensured more reliably.

  Referring to FIG. 6, in the configuration of the present embodiment, the lower end portion of the oil level gauge guide tube 162d is formed integrally with the horizontal partition plate 162a. Therefore, the sealing performance at the joint portion between the oil level gauge guide tube 162d and the horizontal partition plate 162a forming the main body portion of the reflux oil separator 162 is further improved. Further, the reflux oil separator 162 including the oil level gauge guide tube 162d can be formed at a lower cost.

  Referring to FIGS. 1 and 6, in the configuration of the present embodiment, the oil level gauge through hole 162 c is formed at the highest position of the reservoir chamber 132. Therefore, the air can be vented from the upper end of the reservoir chamber 132 more favorably during the oil change operation.

  Referring to FIG. 2, in the configuration of the present embodiment, a gap is formed between the reflux oil guide weir 141c and the reflux oil guide weir 162b. Thus, the reflux oil can be properly distributed.

  Referring to FIG. 1, in the device configuration of the present embodiment, the first thermostat valve device 163 is opened before the second thermostat valve device 166. Thereby, the oil stored in the reservoir chamber 132 can be supplied to the main storage chamber 131 earlier. Therefore, an extreme decrease in the oil level in the main storage chamber 131 can be suppressed as much as possible. That is, the occurrence of a shortage of oil supply to the cylinder head 110 and the cylinder block 120 can be suppressed as much as possible.

  Referring to FIG. 1, in the device configuration of the present embodiment, the first thermostat valve device 163 includes a second thermostat valve device 166, which is a communication portion between the reflux oil storage portion 133 and the reservoir chamber 132, and the engine width. It is arranged at a diagonal position (the farthest position) in the direction.

  Thereby, the oil in the reservoir chamber 132 in the vicinity of the first thermostat valve device 163 is caused by the temporary increase in the oil level in the reservoir chamber 132 generated at the diagonal position with the first thermostat valve device 163. It flows into the main storage chamber 131 via the thermostat valve device 163. Therefore, oil circulation in the oil storage device 130 can be actively performed. Therefore, deterioration of the durability of the oil can be further suppressed.

  Referring to FIGS. 1, 3, and 6, in the present embodiment, the oil communication passage between the main storage chamber 131 and the reservoir chamber 132 is configured by a first thermostat valve device 163. Further, in order to control whether or not the recirculation oil flows into the reservoir chamber 132 from the recirculation oil reservoir 133, the second thermostat valve device 166 has the same configuration as the first thermostat valve device 163 described above. Yes.

  Therefore, according to the present embodiment, the open / close state of the first thermostat valve device 163 and the second thermostat valve device 166 is set by the oil temperature itself based on the operating state of the engine 100. Therefore, a good lubrication state in engine 100 can be realized based on a very simple device configuration.

  Referring to FIGS. 1 and 4, a float valve 164 is provided in this embodiment. As a result, when the oil level in the main storage chamber 131 is suddenly lowered for some reason during the operation of the engine 100, the drain hole 161d is opened. Therefore, the shortage of the oil supply amount to the cylinder head 110 and the cylinder block 120 during the operation of the engine 100 can be suppressed as much as possible. Moreover, the workability at the time of oil change improves.

  -With reference to FIG.1 and FIG.5, in this embodiment, the oil supply valve 165 is provided. Thereby, the workability at the time of oil exchange improves. In particular, when oil is injected, oil level adjustment between the main storage chamber 131 and the reservoir chamber 132 can be appropriately performed.

<5. List of examples of some modifications>
Note that, as described above, the above-described embodiment is merely an example of the embodiment of the present invention considered to be the best at the time of filing of the present application by the applicant, and the present invention is not limited to the above. It is not limited to the embodiment. Therefore, as a matter of course, various modifications can be made to the configurations shown in the above-described embodiments without departing from the essential part of the present invention.

  In the following, some modifications will be illustrated to the extent that they can be added in the application of the present application under the prior application principle. However, it goes without saying that the modified examples are not limited to the following. The limited interpretation of the present invention based on the description of the above-described embodiment and the following modifications unfairly harms the interests of applicants who rush to file applications under the principle of prior application, but unfairly imitates imitators. However, contrary to the purpose of patent law for the purpose of protection and use of the invention, it is not allowed.

  Needless to say, the following modifications can be applied in an appropriate combination within a technically consistent range.

  (I) In addition to the engine disclosed in the above embodiment, the present invention can be applied to various devices including an oil pan such as an automatic transmission.

  (Ii) Either the first thermostat valve device 163 or the second thermostat valve device 166 may be opened first, or may be simultaneously opened.

  (Iii) A heater for forcibly heating the temperature-sensitive deformation portion (wax 163a in FIG. 3) in the first thermostat valve device 163 and / or the second thermostat valve device 166 may be provided. The heating operation of such a heater can be controlled by an engine control computer (ECU).

  Alternatively, instead of the first thermostat valve device 163 and / or the second thermostat valve device 166, a valve device having a structure that can be controlled by an ECU such as an electromagnetic valve, a hydraulically operated valve, and a pneumatically operated valve is used. obtain.

  Thus, finer operation control of the first thermostat valve device 163 and / or the second thermostat valve device 166 according to the operating state of the engine 100 is possible.

  (Iv) The configuration and arrangement of the float valve 164 and the oil supply valve 165 are not limited to those disclosed in the above embodiment. Alternatively, the float valve 164 and / or the lubrication valve 165 can be omitted.

  (V) Other modifications not specifically mentioned are naturally included in the scope of the present invention as long as they do not change the essential part of the present invention.

  For example, in the description of each embodiment described above, the integrally formed components may be integrally formed without joints, or a plurality of separate parts may be joined by bonding, welding, screwing, or the like. Of course, it may be formed by.

  Specifically, for example, the first oil pan 140 and the second oil pan 150 may be configured integrally. Alternatively, the first oil pan 140 may be formed integrally with the cylinder block 120 as a so-called lower case.

  Further, the reflux oil guide weir 141c and the reflux oil guide weir 162b may be integrally formed.

  Further, the oil pan separator 161 and the reflux oil separator 162 may be independently configured as separate members and connected by bonding, screwing, or the like.

  (Vi) In addition, elements expressed functionally and functionally in each element constituting the means for solving the problems of the present invention are disclosed in the above-described embodiments, examples, and modifications. In addition to the specific structure, any structure that can realize the action / function is included.

It is sectional drawing at the time of notching a part of multi-cylinder engine provided with the oil storage apparatus of one Embodiment of this invention, and seeing from the direction along an engine longitudinal direction (cylinder arrangement direction). It is a perspective view at the time of seeing the oil storage apparatus of this embodiment shown by FIG. 1 from diagonally upward. FIG. 3 is an enlarged side cross-sectional view of the first thermostat valve device shown in FIG. 2. Here, FIG. 3A shows a valve closing state at a low temperature, and FIG. 3B shows a valve opening state at a high temperature. FIG. 2 is an enlarged side cross-sectional view of the periphery of the float valve shown in FIG. 1. Here, FIG. 4 (A) shows a state where the float valve is raised, and FIG. 4 (B) shows a state where the float valve is lowered. It is sectional drawing to which the periphery of the oil supply valve shown by FIG. 1 was expanded. Here, FIG. 5 (A) shows a state where the lubrication valve is lowered, and FIG. 5 (B) shows a state where the lubrication valve is raised. It is sectional drawing to which the horizontal partition plate shown by FIG. 1 was expanded.

Explanation of symbols

100 ... Engine, 110 ... Cylinder head,
120 ... Cylinder block, 126 ... Oil strainer,
130 ... Oil storage device, 131 ... Main storage chamber,
132 ... Reservoir chamber, 133 ... Reflux oil reservoir,
140 ... first oil pan, 141b ... slope part,
141c ... Reflux oil guide weir, 150 ... Second oil pan,
160 ... Inner plate, 161 ... Oil pan separator,
162 ... Reflux oil separator, 162a ... Horizontal divider,
162a1 ... second thermostat fixing recess, 162b ... reflux oil induction weir,
162c ... Oil level gauge through hole, 162c1 ... Air discharge guide surface,
162d ... Oil level gauge guide tube, 163 ... First thermostat valve device,
163a ... wax, 163b ... valve,
166 ... Second thermostat valve device, 171 ... Oil level gauge

Claims (7)

In an oil storage device configured to store oil for lubrication of a lubricated mechanism,
An oil pan capable of storing the oil in an inner space;
An oil pan separator disposed in the space so as to divide the space inside the oil pan into a main reservoir chamber that opens toward the lubricated mechanism and a reservoir chamber adjacent to the main reservoir chamber; ,
Provided in the reserve oil separator and configured to allow the oil to flow from the reservoir chamber to the bottom of the main storage chamber by being opened according to the operating state of the lubricated mechanism. A first control valve,
A recirculation oil storage part is formed above the reservoir chamber for reserving the remainder of the recirculation oil that recirculates from the lubricated mechanism toward the oil pan, other than the part that recirculates directly to the main storage chamber. A reflux oil separator configured to be able to
Provided in the reflux oil separator and configured to allow the oil to flow from the reflux oil reservoir to the reservoir chamber by being opened according to the operating state of the lubricated mechanism. A second control valve,
A reflux oil guiding portion configured to guide the reflux oil toward the second control valve;
An oil storage device comprising: The oil storage device according to claim 1,
The oil recirculation device is characterized in that the recirculation oil guide section is composed of a recirculation oil induction weir provided to extend upward from the recirculation oil separator. The oil storage device according to claim 1 or 2,
The oil pan is
An oil storage portion configured to surround the space in which the main storage chamber and the reservoir chamber are formed;
A slope portion that is disposed so as to face the lubricated mechanism and that is formed so as to receive the reflux oil and flow into the oil storage portion;
With
A reflux oil guide portion configured to guide the reflux oil received by the slope portion toward the reflux oil guide portion is formed in the slope portion,
The oil recirculation apparatus, wherein the recirculation oil guide section includes the recirculation oil guide section. The oil storage device according to claim 3,
The recirculation oil guide section is composed of a recirculation oil guide weir provided so as to extend upward from the slope section. The oil storage device according to claim 4,
When viewed through from the vertical direction and the direction orthogonal to the longitudinal direction of the reflux oil guide weir, the one end portion of the reflux oil guide weir in the longitudinal direction and the one end portion of the reflux oil guide weir in the longitudinal direction overlap each other. The oil storage device is characterized in that the return oil guide weir and the return oil guide weir are arranged. The oil storage device according to any one of claims 1 to 5,
An oil level gauge guide tube made of a cylindrical member, further configured to guide the attachment and detachment of the oil level gauge by accommodating an oil level gauge made of a rod-shaped member;
The reflux oil separator has an oil level gauge insertion through hole into which the oil level gauge is inserted,
An oil storage device, wherein a lower end portion of the oil level gauge guide tube is liquid-tightly connected to a portion around the through hole for inserting the oil level gauge in the reflux oil separator. The oil storage device according to claim 6,
The oil storage device according to claim 1, wherein the oil level gauge guide tube is configured such that a height of the oil level gauge guide tube is higher than a height of the reflux oil guiding portion.

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