JP2007321639A - Two-tank oil pan and engine having it - Google Patents

Two-tank oil pan and engine having it Download PDF

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Publication number
JP2007321639A
JP2007321639A JP2006152255A JP2006152255A JP2007321639A JP 2007321639 A JP2007321639 A JP 2007321639A JP 2006152255 A JP2006152255 A JP 2006152255A JP 2006152255 A JP2006152255 A JP 2006152255A JP 2007321639 A JP2007321639 A JP 2007321639A
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Prior art keywords
oil
chamber
engine
oil pan
engine oil
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Pending
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JP2006152255A
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Japanese (ja)
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Taiichi Mori
泰一 森
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Toyota Motor Corp
トヨタ自動車株式会社
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Priority to JP2006152255A priority Critical patent/JP2007321639A/en
Publication of JP2007321639A publication Critical patent/JP2007321639A/en
Pending legal-status Critical Current

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Abstract

An object of the present invention is to provide a two-tank oil pan that can cope with an engine oil change operation using an oil changer.
A two-tank oil pan (1) is disposed in an oil pan (4), the oil pan (4), and communicates with the interior of an engine block (3). An oil pan separator (5) that forms a second chamber (7) located around one chamber (6), a lower opening (19) that opens to the second chamber (7), and a first chamber (6). A cylindrical body (17) having an upper opening (22) is provided. Furthermore, a one-way valve (20) is provided that inhibits the engine oil from flowing out of the cylindrical body (17) into the second chamber (7) through the lower opening (19). When the nozzle (18) of the oil changer is inserted into the cylinder state (17) and new engine oil is discharged, the one-way valve (17) is closed and the engine oil overflowing from the upper opening (22) flows into the first chamber (6 ).
[Selection] Figure 1

Description

  The present invention relates to an oil pan that is provided below an engine block and stores engine oil.

  Conventionally, engine oil has been used for engine lubrication and cooling. This engine oil is stored in an oil pan provided at the lower part of the engine, and is sent to each part of the engine by an oil pump and circulated. The engine oil that has circulated through each part of the engine is dripped into the lower oil pan. And the engine oil dripped in the oil pan is sent out again to each part of the engine by the oil pump. During this time, the engine oil receives heat from each part of the engine and cools each part. The engine oil also has a role of forming an oil film in each part of the engine to promote lubrication between the parts and preventing oxidation of the parts.

  Here, immediately after the cold start of the engine, the engine oil stored in the oil pan is cold, the viscosity is high, and it is not in a state suitable for circulating each part of the engine and lubricating each part. Therefore, immediately after the cold start, it is desired to raise the temperature of the engine oil as soon as possible so as to have an appropriate viscosity. For this purpose, the oil pan is divided into a plurality of compartments, and immediately after the cold start, the engine oil in one compartment is easily circulated, and the engine oil in this compartment is heated earlier, After warming-up is complete, it has already been studied to avoid overheating of the engine oil and make the engine oil in a preferable state (Patent Document 1). Such an early temperature rise of engine oil contributes to an improvement in fuel efficiency due to an early reduction of friction, and an improvement is also desired from the recent strong demand for an improvement in fuel efficiency.

  FIG. 6 is a cross-sectional view illustrating the structure of the two-tank oil pan 50 described in Patent Document 1. In the two-tank oil pan 50, an oil pan separator 51 having a recess 51a is provided in the oil pan 52 in order to effectively raise the temperature of the engine oil so that the engine oil suction port 53a is located in the recess 51a. An oil strainer 53 is disposed on the side. Moreover, the structure which provided the communication holes 54 and 55 which connect the inside and outside of the recessed part 51a in the upper part and lower part of the side wall 51a1 of the recessed part 51a is employ | adopted. Of these communication holes 54 and 55, the communication hole 55 provided in the lower part of the side wall 51a1 of the recess 51a controls the flow of the engine oil inside and outside the recess 51a by utilizing the change in the viscosity of the engine oil. Specifically, the diameter of the communication hole 55 is set to a small diameter, and engine oil having a high viscosity during warm-up uses the oil resistance when passing through the communication hole 55 to increase the engine oil inside and outside the recess 51a. To prevent mixing. On the other hand, low-viscosity engine oil after completion of warm-up can pass through the communication hole 55, and the engine oil inside and outside the recess 51a is mixed. If the engine oil is mixed inside and outside the recess 51a, the temperature of the engine oil inside the recess 51a that has become hot can be lowered by the oil outside the recess 51a at a low temperature.

  On the other hand, the communication hole 54 provided in the upper part of the side wall 51a1 of the recessed part 51a can distribute | circulate engine oil inside and outside the recessed part 51a irrespective of the viscosity of engine oil. The engine oil that circulates mainly inside the engine block 56 and drip into the oil pan separator 51 (inside the recess 51a) flows out from the inside of the recess 51a of the oil pan separator 51 to the outside. For this reason, an engine oil circulation path is formed such that the engine oil flowing out from the upper part of the recess 51a flows again into the recess 51a from the lower part of the recess 51a according to the viscosity of the engine oil, as indicated by an arrow 57. ing. Engine oil mixing is promoted by such an engine oil circulation path to cool the engine oil. The mixed engine oil is sucked up from the suction port 53a and supplied into the engine block 56 from above. In FIG. 6, reference numeral 58 is a drain plug.

JP 2003-222012 A

As described above, the two-tank oil pan 50 having the structure described in Patent Document 1 has a configuration in which the inside of the oil pan 52 is divided into a plurality of sections, and the engine oil in one section is easily circulated immediately after the cold start. As a result, the engine oil in the compartment can be raised in temperature at an early stage, and certain effects such as improvement in fuel consumption can be achieved.
However, in the two-tank oil pan 50 as described in Patent Document 1, it is difficult to extract the engine oil inside and outside the recess 51 when changing oil. It is also difficult for the newly injected engine oil to have a substantially uniform level inside and outside the recess 51a.

  Recently, an oil changer that can automatically extract engine oil from an oil pan and also automatically inject new engine oil into the oil pan is sometimes used. If this oil changer is operated, the operator can perform other operations during that period, and the efficiency of the entire operation can be improved.

  Then, this invention makes it a subject to provide the two tank type oil pan which can respond to the replacement | exchange operation | work of the engine oil using an oil changer.

  In order to solve such a problem, a two-tank oil pan of the present invention includes an oil pan attached to a lower portion of an engine block, a first chamber disposed in the oil pan and communicating with the inside of the engine block, and the An oil pan separator that forms a second chamber located around the first chamber, an engine oil suction port disposed in the first chamber, and a distal end side formed with a lower opening that opens into the second chamber Is disposed at the bottom of the oil pan and has an upper opening formed above the lower opening and leading to the first chamber, and an engine from the tubular body to the second chamber through the lower opening. A one-way valve that inhibits oil outflow, a communication hole through which engine oil in the first chamber flows out to the second chamber, and engine oil between the first chamber and the second chamber in accordance with engine oil temperature And flow control means for controlling the flow, characterized by comprising a (claim 1).

  By dividing the oil pan into the first chamber and the second chamber by the oil pan separator as described above, and arranging the engine oil suction port in the first chamber, a small amount of engine oil in the first chamber at the time of cold start Can be circulated in the engine to increase the temperature of the engine oil early.

  In such a two-tank oil pan, the cylindrical body can be configured as an oil level gauge guide (claim 2). The cylindrical body communicates with the second chamber at the lower opening, and the one-way valve does not hinder the inflow of engine oil from the second chamber into the cylindrical body. The oil level is almost the same. Further, since the first chamber and the second chamber communicate with each other through a communication hole through which engine oil in the first chamber flows into the second chamber, the oil level in the first chamber and the oil level in the second chamber are substantially the same. It has become. From the above, the cylindrical body can also function as an oil level gauge guide. The communication hole is provided in the oil pan separator, allows the engine oil to flow from the first chamber to the second chamber, and suppresses the inflow of engine oil from the second chamber to the first chamber. As a configuration provided with an oil supply valve for the second chamber, the oil level in the first chamber and the oil level in the second chamber can be made substantially the same. As described above, the engine oil returned from the inside of the engine or newly injected engine oil first flows into the first chamber, and then flows into the second chamber through the communication hole.

  For this reason, when the oil changer nozzle is inserted into the cylindrical body and the engine oil is injected, the engine oil filled in the cylindrical body overflows from the upper opening and flows into the first chamber and then into the second chamber. The oil flows out and engine oil spreads into both rooms. At this time, the one-way valve prevents the engine oil from flowing out of the cylindrical body into the second chamber, so that the engine oil in the cylindrical body first overflows into the first chamber.

  The distribution control means in the present invention can employ, for example, a thermostat in which the temperature sensing unit is arranged in the first chamber. As a result, when the warm-up proceeds and the temperature of the engine oil in the first chamber rises, Engine oil is mixed between the first chamber and the second chamber, and excessive temperature rise of the engine oil in the first chamber can be avoided.

  Such a two-tank oil pan can be configured to have a first chamber oil drain hole at the bottom of the oil pan separator. Furthermore, it can be set as the structure which mounted | wore with this 1st chamber oil drain hole the float valve which has arrange | positioned the float side in said 1st chamber (Claim 4). With such a configuration, the engine oil in the first chamber flows into the second chamber as the amount of engine oil in the second chamber decreases. Thereby, when extraction of engine oil is started from the nozzle of the oil changer inserted in the cylindrical body, first, engine oil in the second chamber flows into the cylindrical body and is extracted. Thereafter, the engine oil that has fallen into the second chamber flows into the cylindrical body and is extracted. At this time, the one-way valve does not hinder the flow of engine oil from the second chamber into the cylindrical body.

  It is desirable that the upper opening in such a two-tank oil pan is configured to open to an oil receiving plate extending from the upper end edge of the first chamber. Here, the oil receiving plate receives engine oil dripped from the inside of the engine and guides it into the first chamber. If an upper opening is opened in such an oil receiving plate, the oil receiving plate dripped from the inside of the engine during engine operation. Similar to the engine oil to be used, the engine oil injected into the cylindrical body can be first introduced into the first chamber.

  Moreover, in such a two-tank type oil pan, a recess can be formed in the bottom of the oil pan, and the cylindrical body can be extended into the recess (Claim 6). By having such a configuration and collecting the engine oil in the oil pan in the recess, almost the entire amount of the engine oil in the oil pan can be extracted.

  If the two-tank oil pan as described above is combined with various engines, the engine of the present invention can be obtained (claim 7).

  According to the present invention, in the two-tank oil pan provided with the first chamber communicating with the interior of the engine block and the second chamber positioned around the first chamber, the lower opening opened in the second chamber A cylindrical body in which an upper end opening to the first chamber is formed above the lower opening, and the cylindrical body is formed through the lower opening. An engine using an oil changer with a one-way valve that inhibits the flow of engine oil from the first chamber to the second chamber and a communication hole that allows the engine oil in the first chamber to flow into the second chamber It can also handle oil change work.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  First, the two-tank oil pan 1 of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a schematic configuration of a two-tank oil pan 1. 2 and 3 are enlarged cross-sectional views of portions indicated by reference numeral A in FIG. In the two-tank oil pan 1, an oil pan separator 5 is mounted inside an oil pan 4 mounted on the lower side of a cylinder block 3 constituting the engine 2. The oil pan separator 5 partitions the inside of the oil pan 2 into a first chamber 6 that communicates with the interior of the engine block 3 and a second chamber 7 that is formed so as to cover the first chamber 6. That is, the second chamber 7 is located around the first chamber 6.

  The first chamber 6 includes a large capacity part 5c formed on the bottom side of the oil pan separator 5 and a small capacity part 5b formed by providing a continuous constriction on the upper side of the large capacity part 5c. . The oil pan separator 5 includes a shoulder portion 5c1 at the upper end of the large capacity portion 5c. The shoulder portion 5c1 is provided with a communication hole 9 through which engine oil in the first chamber 6 flows out to the second chamber 7. The communication hole 9 is provided with an oil supply valve 10 to the second chamber that closes the communication hole 9 as the oil level in the first chamber 6 rises. The oil supply valve 10 is a valve that allows engine oil to flow from the first chamber 6 to the second chamber 7 and suppresses inflow of engine oil from the second chamber 7 to the first chamber 6. The oil supply valve 10 has a rod 10a that penetrates the communication hole 9, and a flange 10b that receives hydraulic pressure at the upper end of the rod 10a. The oil supply valve 10 is normally closed, but opens when the oil level in the first chamber 6 becomes higher than the oil level in the second chamber 7. Engine oil can be injected and stored in the first chamber 6 and the second chamber 7 equally by the communication hole 9 and the oil supply valve 10. The engine oil supplied from the engine block 3 side at the time of oil exchange or the like is first stored in the first chamber 6. When the engine oil in the first chamber 6 reaches the height of the communication hole 9, the engine oil raises the flange portion 10 b and opens the communication hole 9. Thereby, the engine oil overflows from the communication hole 9 to the second chamber 7 side. Thereby, the volume of the engine oil in the second chamber 7 is also increased. When the oil levels in the first chamber 6 and the second chamber 7 are substantially the same, the hydraulic pressure received by the flange 10b is substantially the same on the upper and lower surfaces, and the oil supply valve 10 closes the communication hole 9.

  The oil pan separator 5 includes an oil receiving plate 5 a extending from the upper end edge of the small capacity portion 5 b, that is, the upper end edge 5 b 1 of the first chamber 6. A first thermostat 11 is mounted on the oil receiving plate 5a so that the temperature sensing portion is directed toward the engine block 3 side. The first thermostat 11 is opened when the engine oil dripping from the engine block 3 is at a high temperature. As a result, high-temperature engine oil is allowed to flow into the second chamber 7 without flowing into the first chamber 6.

  An oil strainer suction port 12 is disposed in the first chamber 6. The engine oil in the first chamber 6 is sucked up from the suction port 12 when the lubrication pump 13 is driven, and is pumped to each part of the engine that needs to be supplied with engine oil.

  The oil pan separator 5 is provided with a second thermostat 14 in the large capacity part 5c so that the temperature sensing part is located on the first chamber 6 side. The second thermostat 14 opens when the temperature of the engine oil in the first chamber 6 becomes high. Thereby, the first chamber 6 and the second chamber 7 communicate with each other when the engine oil is at a high temperature. Thus, the 2nd thermostat 14 controls the distribution | circulation of the engine oil between the 1st chamber 6 and the 2nd chamber 7 according to engine oil temperature, and is corresponded to the distribution control means in this invention.

  A first chamber oil drain hole 5 c 2 is provided at the bottom of the oil pan separator 5. A float valve 16 is attached to the first chamber oil drain 5c1. The float valve 16 includes a rod 16a that penetrates through the first chamber oil drain hole 5c2, a float portion 16b provided at the upper end of the rod 16a, and a valve body 16c provided at the lower end of the rod 16a. Yes. The float valve 16 operates when the engine oil in the first chamber 6 is extracted. First, the engine oil in the second chamber 7 starts to be drained, and when a difference in oil level occurs between the second chamber 7 and the first chamber 6, the hydraulic pressure in the first chamber 6 acts on the valve body 16c, and the float valve 16 is The pushed down first chamber oil drain hole 5c2 is opened. Thereby, the engine oil in the first chamber 6 can be extracted. When both the first chamber 6 and the second chamber 7 are filled with engine oil, the float valve 16 has a balance between the hydraulic pressure acting on the float portion 16b and the valve body 16c so that the valve body 16c is in the first chamber oil drain hole. 5c2 is put in a closed state.

  The two-tank oil pan 1 is further provided with a cylindrical body 17 arranged so as to be along the side wall of the oil pan separator 5 as shown in the figure. The cylindrical body 17 is used as an oil level gauge guide. When changing engine oil, the oil changer is performed by inserting the nozzle 18 of the oil changer into the cylindrical body 17. As shown in FIGS. 2 and 3, the cylindrical body 17 is formed with a lower opening 19 that opens to the second chamber 7 on the front end side disposed at the bottom of the oil pan 4. Yes. The lower opening 19 is provided with a one-way valve 20 that inhibits the outflow of engine oil from the cylindrical body 17 to the second chamber 7. The one-way valve 20 is attached to the lower opening 19 so as to be rotatable by a shaft portion 20a. On the other hand, as shown in FIG. 2, the valve 20 is restricted from rotating toward the second chamber 7 by a stopper 21 provided in the lower opening 19, and closes the lower opening 19 by a force from the inside of the cylindrical body 17 to the outside. It is supposed to be. That is, when the force from the cylindrical body 17 side is larger than the force from the second chamber 7 side, the one-way valve 20 is closed. On the other hand, when the force from the second chamber 7 side is larger than the force from the cylindrical body 17 side, the one-way valve 20 is opened.

  Such a cylindrical body 17 includes an upper opening 22 that communicates with the first chamber 6. Specifically, the oil receiving plate 5 a that leads the engine oil into the first chamber 6 is opened. Moreover, the recessed part 4b is provided in the bottom part of the oil pan 4, and the front-end | tip part of the cylindrical body 17 is extended to this recessed part 4b.

  Next, an oil change operation in the two-tank oil pan 1 having the above-described configuration will be described with reference to the drawings.

  Oil change is performed using an oil changer. The oil changer automatically extracts the engine oil in the two-tank oil pan 1 and subsequently injects the engine oil into the two-tank oil pan 1. When performing the oil change operation, first, an oil level gauge (not shown) inserted in the cylindrical body 17 used as an oil level gauge guide is extracted. Thereafter, the nozzle 18 of the oil changer is inserted into the cylindrical body 17 and the oil changer is started.

  The oil changer is started, and a flow of engine oil having a direction as indicated by an arrow 23 is formed. Then, the one valve 20 mounted on the lower opening 19 so as to be rotatable is rotated inward of the cylindrical body 17 as shown in an enlarged view in FIG. A flow of engine oil is formed. Thereby, first, the engine oil in the second chamber 7 is extracted. When the engine oil in the second chamber 7 is extracted and the amount of engine oil in the second chamber 7 decreases, the float valve 16 is lowered and the first chamber oil drain hole 5c2 is opened. As a result, the engine oil in the first chamber 6 flows into the second chamber 7 through the first chamber oil drain hole 5c2 as indicated by an arrow 25. The engine oil that has flowed out flows into the cylindrical body 17 through the lower opening 19 and is sucked up and extracted by the nozzle 18. In addition, since the front-end | tip part of the cylindrical body 17 is extended to the recessed part 4b provided in the bottom part of the oil pan 4, almost all the engine oil in the oil pan 4 can be extracted.

  When such a series of extraction operations are completed, the oil changer shifts to a new engine oil injection operation. The oil changer that has shifted to the injection operation discharges new engine oil from the nozzle 18. As indicated by an arrow 26, the engine oil discharged into the cylindrical body 17 presses the one valve 20 to the outside of the cylindrical body 17 by its pressure. As shown in FIG. 3, the pressed one-way valve 20 abuts against the stopper 21 to restrict the rotation, and closes the lower opening 19. As the lower opening 19 is closed, the discharged engine oil rises by flowing backward in the cylindrical body 17 as indicated by an arrow 27. The raised engine oil overflows from the upper opening 22 opened in the oil receiving plate 5a. The engine oil overflowing from the upper opening 22 flows through the oil receiving plate 5 a and flows into the first chamber 6 as indicated by an arrow 28. When the bulk of the engine oil in the first chamber 6 increases and reaches the shoulder 5c1, the engine oil pushes up the lubrication valve 10 and flows out from the communication hole 9 to the second chamber 7 as shown by an arrow 29. . When the volume of the engine oil that has flowed into the second chamber 7 rises and becomes substantially equal to the volume in the first chamber 6, the hydraulic pressure on the first chamber 6 side and the hydraulic pressure on the second chamber 7 side applied to the lubrication valve 10 are increased. In balance, the lubrication valve 10 closes the communication hole 9. In such a state, the engine replacement work is completed.

  As described above, the level of engine oil in the first chamber 6 and the second chamber 7 after completion of the oil change is substantially the same. Further, since the one-way valve 20 does not seal the lower opening 19, the communication between the cylindrical body 17 and the second chamber 7 is ensured in the lower opening 19, and therefore the level in the cylindrical body 17 is also high. It is almost the same. For this reason, if an oil level gauge is inserted in the cylindrical body 17, the level of the engine oil in the two-tank oil pan 1 can be grasped.

  If the one-way valve 20 is not provided and the engine oil discharged into the cylindrical body 17 flows into the second chamber 7 through the lower opening 19 without passing through the first chamber 6, the second chamber 7 The engine oil flows into the first chamber 6 through the first chamber oil drain hole 5c2. However, when the bulk of the engine oil in the first chamber 6 increases and the float portion 16b of the float valve 16 rises, the first chamber oil drain hole 5c2 is blocked. As a result, it becomes difficult to inject engine oil into the first chamber 6 any more. Even in such a state, the cylindrical body 17 and the second chamber 7 communicate with each other, and the engine oil levels of the cylindrical body 17 and the second chamber 7 are substantially the same. For this reason, when the oil level gauge is inserted into the cylindrical body 17 and the oil level is measured, the measured value may indicate the target level. However, since the engine oil amount in the first chamber 6 is actually insufficient, the total oil amount in the two-tank oil pan 1 is insufficient. If the engine 2 is operated in such a state, the oil temperature is likely to rise more than usual, and it is easy to be contaminated. This can result in poor lubrication.

  However, as in this embodiment, the engine oil in the cylindrical body 17 once overflows from the upper opening 22 and flows into the first chamber 6, and the engine oil that has passed through the first chamber 6 flows out into the second chamber. By doing so, the amount of engine oil in both chambers can be injected up to a predetermined amount.

  The engine oil that is sucked from the suction port 12 during cold engine operation and supplied to each part of the engine and then dripped from the engine block 3 once flows into the first chamber 6, and then passes through the communication hole 9. It flows out into the second chamber 7. However, when the temperature of the engine oil rises to a predetermined value, the first thermostat 11 may open and flow directly into the second chamber 7. When the temperature of the engine oil in the first chamber 7 rises and the second thermostat 14 is opened, the first chamber 6 and the second chamber 7 communicate with each other, and the engine oil in both chambers is mixed and the engine oil is mixed. An excessive increase in temperature is suppressed.

  Moreover, the two-tank type oil pan 1 of the present embodiment is also compatible with an oil change operation that does not use an oil changer. That is, the oil pan 4 includes an oil drain hole 4a in which the drain plug 30 is mounted, and the engine oil in the two-tank oil pan 1 can be extracted from the oil drain hole 4a. When the engine oil is extracted through the oil drain hole 4a, the engine oil in the second chamber 7 is first discharged. At this time, no great pressure is applied to the one-way valve 20 and the communication between the cylindrical body 17 and the second chamber 7 is ensured, so that the engine oil in the cylindrical body 17 is also discharged. When the engine oil in the second chamber 7 decreases, the float valve 16 descends and the first chamber oil drain hole 5c2 is opened. As a result, the engine oil in the first chamber 6 flows into the second chamber 7 through the first chamber oil drain hole 5c1 as indicated by an arrow 25. The engine oil that has flowed out is discharged to the outside through the oil drain hole 4a. The engine oil in the two-tank oil pan 1 can be extracted through the above steps. When injecting new engine oil, after closing the oil drain hole 4a with the drain plug 30 and pouring the engine oil into the first chamber 6 from the top of the engine 2, the engine oil is circulated in the same manner as when using an oil changer. The engine oil can be injected so that the levels of the first chamber 6, the second chamber 7, and the cylindrical body 17 are substantially the same.

  The above-described embodiments are merely examples for carrying out the present invention, and the present invention is not limited thereto. Various modifications of these embodiments are within the scope of the present invention. It is apparent from the above description that various other embodiments are possible within the scope.

It is sectional drawing explaining schematic structure of the two tank type oil pan of an Example. FIG. 2 is an enlarged cross-sectional view of a portion indicated by reference numeral A in FIG. 1, with one valve opened. FIG. 2 is an enlarged cross-sectional view of a portion indicated by reference numeral A in FIG. 1 and is a view in which one valve is closed. It is explanatory drawing which shows a mode that engine oil is extracted at the time of an oil exchange operation | work. It is explanatory drawing which shows a mode that engine oil is inject | poured at the time of an oil exchange operation | work. It is sectional drawing explaining the structure of the conventional 2 tank type oil pan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Two tank type oil pan 2 Engine 3 Engine block 4 Oil pan 4a Oil drain hole 4b Recessed part 5 Oil pan separator 5a Oil receiving plate 5b Small capacity part 5c Large capacity part 5c1 Shoulder part 5c2 First chamber oil drain hole 6 First chamber 7 Second chamber 9 Communication hole 10 Lubrication valve 11 First thermostat 12 Suction port 13 Lubrication pump 14 Second thermostat 16 Float valve 17 Cylindrical body 18 Nozzle 19 Lower opening 20 One valve 21 Stopper 22 Upper opening 30 Drain plug

Claims (7)

  1. An oil pan attached to the lower part of the engine block;
    An oil pan separator disposed in the oil pan and forming a first chamber communicating with the interior of the engine block and a second chamber located around the first chamber;
    A suction port for engine oil disposed in the first chamber;
    A cylindrical body in which the tip side on which the lower opening that opens to the second chamber is formed is disposed at the bottom of the oil pan, and the upper opening that leads to the first chamber is formed above the lower opening;
    A one-way valve that inhibits outflow of engine oil from the cylindrical body to the second chamber through the lower opening;
    A communication hole through which engine oil in the first chamber flows out to the second chamber;
    A flow control means for controlling the flow of engine oil between the first chamber and the second chamber according to the engine oil temperature;
    A two-tank oil pan characterized by comprising
  2. The two-tank oil pan according to claim 1,
    A two-tank oil pan characterized in that the cylindrical body is an oil level gauge guide.
  3. The two-tank oil pan according to claim 1,
    A two-tank oil pan comprising a first chamber oil drain hole at the bottom of the oil pan separator.
  4. The two-tank oil pan according to claim 1,
    A two-tank oil comprising a first chamber oil drain hole at the bottom of the oil pan separator, and a float valve having a float side disposed in the first chamber is attached to the first chamber oil drain hole. Bread.
  5. The two-tank oil pan according to claim 1,
    The two-tank oil pan, wherein the upper opening is opened in an oil receiving plate extending from an upper end edge of the first chamber.
  6. The two-tank oil pan according to claim 1,
    A two-tank oil pan, wherein a concave portion is formed in a bottom portion of the oil pan, and the cylindrical body is extended into the concave portion.
  7. An engine comprising the two-tank oil pan according to any one of claims 1 to 6.
JP2006152255A 2006-05-31 2006-05-31 Two-tank oil pan and engine having it Pending JP2007321639A (en)

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JP2006152255A JP2007321639A (en) 2006-05-31 2006-05-31 Two-tank oil pan and engine having it

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013185477A1 (en) * 2012-06-15 2013-12-19 苏州科瓴精密机械科技有限公司 Lubrication system for four-stroke engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013185477A1 (en) * 2012-06-15 2013-12-19 苏州科瓴精密机械科技有限公司 Lubrication system for four-stroke engine

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