JP2008280899A - Engine oil collecting and reducing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine oil collecting and reducing structure capable of preventing contamination due to scattering of engine oil leaked from an oil seal 14, and also reducing oil consumption by recovering the engine oil and returning it to an oil pan 12. <P>SOLUTION: A tray 21 is arranged below the outside of the oil seal 14 for accumulating the engine oil leaked from the oil seal 14, and also a return communication mechanism is provided between the tray 21 and the oil pan 12. Also, a scatter preventing frame 22 is formed around the outside of the oil seal 14, and the tray 21 is arranged to the lower portion of the scatter preventing frame 22. Further, the return communication mechanism is provided with a communication hole 12a formed between the tray 21 and the oil pan 12, and an operating valve 33 is provided for the communication hole 12a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an engine oil leakage treatment technique, and more particularly to a technique for preventing engine oil from being contaminated by engine oil leaking from an oil seal of a crankshaft and reducing engine oil consumption.

As shown in FIG. 8, there is known a technique in which a conventional crankshaft is fitted to a cylinder block and this fitting portion is sealed with an oil seal (see, for example, “Patent Document 1” and “Patent Document 2”). .
JP 2000-282827 A Japanese Patent Laid-Open No. 10-299447

  However, in the above prior art, the oil seal may be deteriorated, worn, or engine oil may leak from the sealed crankshaft fitting portion due to long-term operation, and the surroundings may be soiled. . There is also a problem that engine oil consumption increases due to leakage.

  In order to solve the above-mentioned problems, the present invention can prevent engine oil leaking from the oil seal from being scattered around and contaminating the engine oil, and recovering the engine oil and returning it to the oil pan, thereby reducing oil consumption. An engine oil collection / reduction structure that can reduce the amount of oil is provided.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect, the crankshaft is supported by the cylinder block via the bearing and the oil seal, and a receiving tray is disposed on the lower side outside the oil seal so that the engine oil leaking from the oil seal can be collected. In addition, a return communication mechanism is provided between the tray and the oil pan.

  According to a second aspect of the present invention, there is provided the engine oil collecting / reducing structure according to the first aspect, wherein an anti-scattering frame is formed around the outside of the oil seal, and the tray is disposed below the anti-scattering frame. Is.

  According to a third aspect of the present invention, there is provided the engine oil collecting / reducing structure according to the first aspect, wherein the return communication mechanism includes a communication hole between the tray and the oil pan, and an open / close valve is provided in the communication hole. It is what you have.

  According to a fourth aspect of the present invention, in the engine oil collecting / reducing structure according to the third aspect, the on-off valve pivotally supports an upper part of a plate-like valve body, and the valve body is connected to a communication hole. It is arranged outside and urged to open outward by an elastic member.

  According to a fifth aspect of the present invention, there is provided the engine oil collecting / reducing structure according to the third aspect, wherein the valve body is connected to a film body (diaphragm or the like) that is deformed by the pressure of the intake manifold and is closed during operation. It is composed.

  In Claim 6, it is an engine oil collection / reduction | restoration structure described in Claim 3, Comprising: The said valve body is connected with an expansion-contraction type actuator (a solenoid, a cylinder, etc.), This actuator is connected with a control means, The valve body is controlled to close during operation and open when stopped.

  According to a seventh aspect of the present invention, in the engine oil collecting / reducing structure according to the third aspect, the rotation base of the valve body is connected to a rotary actuator (such as a motor), and the actuator is connected to the control means. The valve body is controlled to close during operation and open when stopped.

  According to an eighth aspect of the present invention, there is provided the engine oil collecting / reducing structure according to the third aspect, wherein an actuator for opening and closing the valve body is connected to a control means, and the actuator is connected to an oil amount detecting means (float switch or the like). And the actuator is actuated to open the valve body when the amount exceeds the set amount, and closes when the amount is less than the set amount.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, it is possible to prevent the engine oil leaking from the oil seal from being scattered around and contaminated. Further, the engine oil can be collected and easily returned to the oil pan, and the oil consumption can be reduced.

  In claim 2, even if the engine oil leaked from the oil seal is dissipated to the surroundings by rotation of the crankshaft, it can be collected by the anti-scattering frame, and the engine oil falls through the anti-scattering frame and is collected in the tray. be able to. Further, the engine oil can be efficiently collected without polluting the surroundings, and the consumption of the engine oil can be reduced.

  According to the third aspect, the engine oil accumulated in the tray can be returned to the oil pan by opening the on-off valve.

  In claim 4, during operation, the crank chamber becomes negative pressure and the valve body is closed, the engine oil can be accumulated in the tray, and when stopped, the negative pressure disappears and the valve body is opened and returned to the oil pan. it can.

  In claim 5, during operation, the intake manifold becomes negative pressure, the valve body is closed, the engine oil can be accumulated in the tray, and when stopped, the valve body is opened by the elasticity of the film body and returned to the oil pan. Can do.

  According to the sixth aspect of the present invention, it is possible to return the engine oil accumulated in the tray to the oil pan by automatically opening and closing the valve body by judging the operation and stop by the control means.

  According to the seventh aspect of the present invention, it is possible to determine the operation and the stop by the control means, the valve body is automatically opened and closed, and the oil accumulated in the tray can be returned to the oil pan. Moreover, since it connects with a rotating shaft, it can arrange | position compactly.

  According to the eighth aspect of the present invention, when a predetermined amount of engine oil that has accumulated in the saucer has accumulated, it is returned to the oil pan and does not overflow from the saucer.

Next, embodiments of the invention will be described. It should be noted that the technical scope of the present invention is not limited to the embodiments, but extends to the entire scope of the technical idea that the present invention truly intends, as will be apparent from the matters described in the present specification and drawings. It is.
FIG. 1 is a rear perspective view of an engine oil collecting structure according to Embodiment 1 of the present invention.
FIG. 2 is a rear perspective view of the engine oil collecting structure according to the second embodiment of the present invention.
FIG. 3A is a schematic side sectional view of the engine oil reduction structure according to the engine driving state of the third embodiment, and FIG. 3B is a schematic side sectional view similarly related to the engine stop state.
FIG. 4A is a schematic sectional side view of the engine oil reduction structure according to the engine driving state of the fourth embodiment, and FIG. 4B is a schematic sectional side view similarly showing the engine stop state.
FIG. 5 is a schematic sectional side view of an engine oil reduction structure according to Embodiment 5 of the present invention.
FIG. 6 is a schematic sectional side view of an engine oil reduction structure according to Embodiment 6 of the present invention.
FIG. 7 is a schematic cross-sectional side view of an engine oil reduction structure according to Embodiment 7 of the present invention.
FIG. 8 is a rear perspective view of the cylinder block according to the prior art.

[Engine oil collecting structure / Example 1]
First, an engine oil collecting structure according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a rear perspective view of an engine oil collecting structure according to Embodiment 1 of the present invention. In this specification, for the sake of convenience, the left depth direction (the arrow direction in FIG. 1) in FIG. 1 is the front, the right front direction is the rear, the left side toward the front is the left side, and the right side is the right side.

FIG. 1 shows the vicinity of the rear end of the crankshaft 15 of the engine 10. In the engine 10, an oil pan 12 is fastened to a lower end portion of the cylinder block 11 with a bolt or the like. More specifically, the cylinder block 11 includes a cylinder block 11a that forms an upper part and a cylinder case 11b that forms a lower part, and a bolt is fastened with a spacer interposed therebetween. In the present specification, the cylinder block 11 is described as an integrated cylinder block 11a and cylinder case 11b.
A crankshaft 15 is rotatably fitted to the cylinder block 11 via a bearing (not shown), and a rear end portion of the crankshaft 15 extends to the outside of the cylinder block 11. Specifically, the cylinder block 11a and the cylinder case 11b are fastened with the crankshaft 15 fitted to each of the cylinder block 11a and the cylinder case 11b. A flywheel 16 is fastened by a bolt or the like to a rear end portion that extends to the outside of the crankshaft 15.

  An oil seal housing 13 is disposed on the rear end surface of the cylinder block 11. The oil seal housing 13 has an oil seal insertion portion configured in an annular shape, and the oil seal 14 is inserted between the oil seal insertion portion of the oil seal housing 13 and the crankshaft 15.

  A rectangular parallelepiped receiving tray 21 whose upper surface and front surface are opened is disposed by welding or the like below the oil seal housing 13 at the rear end surface of the oil pan 12. A communication hole 12a is opened on the rear surface of the oil pan 12, and the inside of the oil pan 12 and the tray 21 are communicated with each other.

  In the rear end portion of the crankshaft 15 configured as described above, the engine oil stored in the oil pan 12 is sucked up by an oil pump (not shown) and lubricates the bearing portion and the like of the crankshaft 15 through the lubricating oil passage. To do. The engine oil is sealed between the crankshaft 15 and the oil seal housing 13 by an oil seal 14, but a part of engine oil leaks out of the cylinder block 11 due to long-term operation or deterioration or wear. The engine oil leaked from the cylinder block 11 is collected by the receiving tray 21 and is returned into the oil pan 12 through the communication hole 12a.

In this way, the crankshaft 15 is supported by the cylinder block 11 via the bearing and the oil seal 14, and the receiving oil 21 is disposed below the oil seal 14 to store the engine oil leaking from the oil seal 14. In addition, a communication hole 12 a is provided between the tray 21 and the oil pan 12.
As a result, it is possible to prevent the engine oil leaking from the oil seal 14 from being scattered around and contaminated, and the engine oil can be recovered and easily returned to the oil pan 12 to reduce oil consumption. .

[Engine oil collecting structure / Example 2]
Next, an engine oil collecting structure according to Embodiment 2 of the present invention will be described with reference to FIG. It is a back perspective view of the engine oil collection structure concerning Example 2 of the present invention. In addition, in the engine oil collection structure described in the present embodiment, portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, a scattering prevention frame 22 is fixed to the rear end surface of the cylinder block 11 so as to surround the periphery of the oil seal housing 13. The anti-scattering frame 22 is formed in a substantially disk shape whose outer end is bent rearward, and a part of the front surface and the lower end is opened so that the outer shape of the oil seal housing 13 can be accommodated. The lower end of the scattering prevention frame 22 is formed in a planar shape in which a bent portion is inclined from the left and right toward the center, and is further bent downward at the center opening. When the scattering prevention frame 22 is fixed to the cylinder block 11, a central lower bent portion is inserted into the receiving tray 21, surrounds the periphery of the oil seal housing 13 and abuts on the cylinder block 11 to tighten the bolt. It is done.

  In the rear end portion of the crankshaft 15 configured as described above, a part of the engine oil leaked to the outside of the cylinder block 11 is repelled by the rotation of the flywheel 16, but hits the scattering prevention frame 22 and falls down. It is collected in the tray 21 and returned to the oil pan 12 through the communication hole 12a.

Thus, the scattering prevention frame 22 was formed around the outer side of the oil seal 14, and the tray 21 was disposed below the scattering prevention frame 22.
Thereby, even if the engine oil leaked from the oil seal 14 is dissipated to the surroundings by the rotation of the crankshaft 15, it can be collected by hitting the anti-scattering frame 22, and the engine oil falls along the anti-scattering frame 22 and falls to the receiving tray 21. It can be recovered. In addition, the engine oil can be efficiently collected without polluting the surroundings, and the consumption of the engine oil can be reduced.

[Engine oil reduction structure, Example 3]
Next, an engine oil reduction structure according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3A is a schematic side sectional view of the engine oil reduction structure according to the engine driving state of the third embodiment, and FIG. 3B is a schematic side sectional view similarly related to the engine stop state. About each Example of an engine oil reduction structure, it is used for either Example 1 or Example 2 of an engine oil collection structure. Below, it demonstrates as what was used about the engine oil collection structure which concerns on Example 1. FIG. In each of the following drawings, the left side is assumed to be the front and the right side is assumed to be the rear.

  In the present embodiment, an opening / closing valve 33 is disposed in the vicinity of the bottom surface (lowermost surface) in the tray 21 at the rear end surface of the oil pan 12 so that the communication hole 12a can be communicated and closed. Specifically, the pivot shaft 31 with the axial direction directed to the left and right horizontal is arranged with the communication hole 12a upward, and the on-off valve 33, which is a plate-shaped valve body, is fixed (or pivoted) to the pivot shaft 31. The on-off valve 33 is configured to be turnable in side view with the pivot shaft 31 as a pivot shaft. A return spring 32 is inserted between the upper part of the opening / closing valve 33 and the rear upper part of the oil pan 12, and the return spring 32 urges the opening / closing valve 33 rearward (in the direction of the tray 21), and its load (spring force). ) Is set such that the on-off valve 33 is closed by a negative pressure in the crankcase 17 described later.

  In the engine oil reduction structure configured as described above, when the engine 10 is started, the engine oil leaked from the oil seal 14 drops in the direction of arrow A in FIG. 3A as shown in FIG. . Here, since the crankcase 17 has a negative pressure during the operation of the engine 10, the on-off valve 33 moves in the direction of the crankcase 17 (the direction of arrow B in FIG. 3A) against the urging force of the return spring 32. The communication hole 12 a is closed by the open / close valve 33. In this way, the opening / closing valve 33 closes the communication hole 12a by the start of the engine 10, and the engine oil is stored in the tray 21.

  When the engine 10 is stopped, the negative pressure in the crankcase 17 disappears. Therefore, as shown in FIG. 3B, the on-off valve 33 is moved backward by the urging force of the return spring 32 (in the direction of arrow C in FIG. 3B). To be opened. That is, the tray 21 and the crankcase 17 communicate with each other through the communication hole 12a, and the engine oil stored in the tray 21 flows in the direction of the crankcase 17 (the direction of arrow D in FIG. 3B) through the communication hole 12a. The oil pan 12 is reduced.

As described above, the communication hole 12a is provided between the tray 21 and the oil pan 12, and the communication hole 12a includes the opening / closing valve 33. The opening / closing valve 33 pivots on the upper part of the plate-shaped valve body in a rotatable manner. The opening / closing valve 33 was placed outside the communication hole 12a and urged to open outward by the return spring 32.
Accordingly, the engine oil accumulated in the tray 21 can be returned to the oil pan 12 by opening the on-off valve 33. Further, during operation, the crankcase 17 has a negative pressure, the on-off valve 33 is closed, and engine oil can be accumulated in the tray 21. When the operation stops, the on-off valve 33 is opened and the on-off valve 33 is opened and the engine is placed in the oil pan 12. Oil can be reduced.

[Engine oil reduction structure / Example 4]
Next, an engine oil reduction structure according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 4A is a schematic sectional side view of the engine oil reduction structure according to the engine driving state of the fourth embodiment, and FIG. 4B is a schematic sectional side view similarly showing the engine stop state. Note that, in the engine oil reduction structure described in the following embodiments, the same reference numerals are given to portions common to the respective embodiments, and the description thereof is omitted.

In the present embodiment, as in the third embodiment, the opening / closing is a plate-shaped valve body capable of communicating and closing the communication hole 12a through the pivot shaft 41 in the tray 21 at the rear end surface of the oil pan 12. A valve 43 is provided. One end of a connecting means 46 constituted by a connecting rod, a rod or the like is connected to the on-off valve 43, and a diaphragm 44 which is a film body made of an elastic member is connected to the other end. The connecting means 46 is arranged to be slidable back and forth by opening and closing the on-off valve 43, and the sliding is regulated by the elastic force of the diaphragm 44. The diaphragm 44 is housed in a sealed case 48, and the sealed case 48 is separated into front and rear chambers by the diaphragm 44. A compression spring 45 is inserted in the front chamber of the sealed case 48 in front of the diaphragm 44, and the diaphragm 44 swells rearward by the urging force of the compression spring 45, and the load thereof is an intake manifold side opening 47a to be described later. Is set to such an extent that the on-off valve 43 is closed by the negative pressure. However, the on-off valve 43 may be configured to open with the biasing force of only the spring or only the diaphragm.
An intake manifold side opening 47a is opened in the front chamber of the diaphragm 44 (the chamber on the on-off valve 43 side), and the intake manifold side opening 47a communicates with the intake manifold via a hose or the like (not shown). On the other hand, an atmospheric opening 47b is opened in the rear chamber of the diaphragm 44, and is opened in communication with the external atmosphere.

  In the engine oil reduction structure configured as described above, when the engine 10 is started, the engine oil leaked from the oil seal 14 drops in the direction of arrow A in FIG. 4A as shown in FIG. . Here, since the inside of the intake manifold becomes negative pressure during the operation of the engine 10, the intake air is sucked in from the intake manifold side opening 47 a in the direction of arrow B in FIG. 4A, and the diaphragm 44 receives the urging force of the compression spring 45. On the contrary, it expands forward (in the direction of arrow C in FIG. 4A). The connecting means 46 slides forward in conjunction with the expansion of the diaphragm 44, and the on-off valve 43 rotates forward to close the communication hole 12a. In this way, the opening / closing valve 43 closes the communication hole 12 a by the start of the engine 10, and the engine oil is stored in the tray 21.

  When the engine 10 is stopped, the negative pressure in the intake manifold disappears, so that the diaphragm 44 expands rearward (in the direction of arrow D in FIG. 4B) by the urging force of the compression spring 45 as shown in FIG. To do. Then, the coupling means 46 slides backward in conjunction with the expansion of the diaphragm 44, and the on-off valve 43 rotates rearward (in the direction of arrow E in FIG. 4B) to open the communication hole 12a. That is, the tray 21 and the crankcase 17 communicate with each other through the communication hole 12a, and the engine oil stored in the tray 21 flows in the direction of the oil pan 12 (the direction of arrow F in FIG. 4B) through the communication hole 12a. It is reduced.

  Thus, the on-off valve 43 is connected to the film body (diaphragm 44) that is deformed by the pressure of the intake manifold, and is configured to close during operation. Thus, during operation, the intake manifold becomes negative pressure, the on-off valve 43 is closed, and engine oil can be stored in the tray 21. When stopped, the elasticity of the compression spring 45 inserted in the film body (diaphragm 44) The on-off valve 43 is opened, and the engine oil can be returned into the oil pan 12.

[Engine oil reduction structure, Example 5]
Next, an engine oil reduction structure according to Embodiment 5 of the present invention will be described with reference to FIG. FIG. 5 is a schematic sectional side view of an engine oil reduction structure according to Embodiment 5 of the present invention.

  In this embodiment, an opening / closing valve 53, which is a plate-like valve body, is disposed in the tray 21 on the rear end surface of the oil pan 12 so as to be able to communicate and close the communication hole 12a via a pivot shaft 51. . One end of a connecting means 56 composed of a connecting rod or the like is connected to the on-off valve 53, and an electromagnetic solenoid 54 is connected to the other end as an actuator. The connecting means 56 is connected by an electromagnetic solenoid 54 so as to be slidable back and forth. The electromagnetic solenoid 54 is connected to the control means 55 and controls the sliding of the connecting means 56 in response to a command from the control means 55. When the operation of the engine 10 is detected, the control means 55 issues a command to the electromagnetic solenoid 54, slides the connection means 56 forward, rotates the on-off valve 53, and is controlled to close the communication hole 12 a. The Further, when the control means 55 detects that the engine 10 is stopped, the control means 55 issues a command to the electromagnetic solenoid 54, slides the connecting means 56 rearward, rotates the on-off valve 53, and opens the communication hole 12a. Be controlled. The actuator is not limited to the electromagnetic solenoid 54, and a telescopic actuator such as a cylinder can also be used.

  In the engine oil reduction structure configured as described above, when the engine 10 is started, the engine oil leaked from the oil seal 14 drops in the direction of arrow A in FIG. 5 as shown in FIG. Here, during operation of the engine 10, the electromagnetic solenoid 54 slides the connecting means 56 forward to rotate the on-off valve 53, and the communication hole 12a is closed. In this way, the opening / closing valve 53 closes the communication hole 12 a by the start of the engine 10, and the engine oil is stored in the tray 21.

  When the engine 10 is stopped, the electromagnetic solenoid 54 slides the connecting means 56 rearward to rotate the on-off valve 53 rearward (in the direction of arrow B in FIG. 5), thereby opening the communication hole 12a. That is, the tray 21 and the crankcase 17 are communicated with each other through the communication hole 12a, and the engine oil stored in the tray 21 flows in the direction of the oil pan 12 (direction of arrow C in FIG. 5) through the communication hole 12a and is reduced. It is.

  In this way, the on-off valve 53 is connected to the electromagnetic solenoid 54, and the electromagnetic solenoid 54 is connected to the control means 55, and the on-off valve 53 is closed during operation and is controlled to open at the time of stop. As a result, the control means 55 determines the operation and stoppage, and the on-off valve 53 is automatically opened and closed so that the engine oil accumulated in the tray 21 can be returned to the oil pan 12.

[Engine oil reduction structure, Example 6]
Next, an engine oil reduction structure according to Embodiment 6 of the present invention will be described with reference to FIG. FIG. 6 is a schematic sectional side view of an engine oil reduction structure according to Embodiment 6 of the present invention.

  In the present embodiment, an opening / closing valve 63, which is a plate-like valve body, is disposed in the tray 21 on the rear end surface of the oil pan 12 so that the communication hole 12a can be connected and closed by driving a motor 64 serving as an actuator. The The motor 64 is configured to rotate forward or reverse at a set angle upon input of a control signal. The output shaft of the motor 64 is connected and fixed to a rotary shaft fixed to the upper part of the on-off valve 63, or power transmission means such as a gear is provided. It is linked and connected. The motor 64 is connected to the control means 65 and receives an instruction (control signal) from the control means 65 to control opening / closing of the on-off valve 63. When the operation of the engine 10 is detected, the control means 65 issues a command to the motor 64 and is controlled to rotate the on-off valve 63 and close the communication hole 12a. In addition, when detecting the stop of the engine 10, the control means 65 issues a command to reverse the motor 64, and is controlled to rotate the on-off valve 63 to open the communication hole 12a. The actuator is not limited to the motor 64, and other rotary actuators can be used, or linear motion can be converted into rotational motion.

  In the engine oil reduction structure configured as described above, when the engine 10 is started, the engine oil leaked from the oil seal 14 drops in the direction of arrow A in FIG. 6 as shown in FIG. Here, during operation of the engine 10, the motor 64 rotates the on-off valve 63 forward, and the communication hole 12a is closed. In this way, the opening / closing valve 63 closes the communication hole 12a by the start of the engine 10, and the engine oil is stored in the tray 21.

  When the engine 10 is stopped, the motor 64 rotates the on-off valve 63 rearward (in the direction of arrow B in FIG. 6) to open the communication hole 12a. That is, the tray 21 and the crankcase 17 communicate with each other through the communication hole 12a, and the engine oil stored in the tray 21 flows in the direction of the oil pan 12 (the direction of arrow C in FIG. 6) through the communication hole 12a and is reduced. It is.

  In this way, the rotation base of the on-off valve 63 is connected to the motor 64, and the motor 64 is connected to the control means 65, and the on-off valve 63 is closed during operation and is controlled to open when stopped. As a result, the control means 65 determines the operation and stoppage, and the on-off valve 63 is automatically opened and closed, so that the engine oil accumulated in the tray 21 can be returned to the oil pan 12.

[Engine oil reduction structure, Example 7]
Next, an engine oil reduction structure according to Embodiment 7 of the present invention will be described with reference to FIG. FIG. 7 is a schematic cross-sectional side view of an engine oil reduction structure according to Embodiment 7 of the present invention.

In the present embodiment, similar to the sixth embodiment, the oil pan 12 is opened and closed as a plate-shaped valve body in the receiving tray 21 so that the communication hole 12a can be communicated and closed by driving a motor 74 serving as an actuator. A valve 73 is provided. The motor 74 is configured to rotate normally or reversely according to the control signal. The motor 74 is connected to the control means 75, and receives an instruction from the control means 75 to control the opening / closing of the on-off valve 73.
On the other hand, a float switch 76 and a float 77 are disposed in the tray 21 as oil amount detection means (liquid level detection means) and connected to the control means 75. When the set amount of engine oil is stored in the tray 21, the control means 75 detects that the float 77 has been raised to a specified height and the float switch 76 has been turned ON, and the set amount has been stored. Then, a command is issued to the motor 74, and the on-off valve 73 is rotated to control the opening of the communication hole 12a. Further, when the engine oil is discharged from the tray 21, the control means 75 detects that the float 77 is lowered, and when the float is lowered to the set height, the float switch 76 is turned off to reduce the oil in the tray 21. Then, a command is issued to the motor 74, and the on-off valve 73 is rotated so as to close the communication hole 12a. The actuator is not limited to the motor 74, and other rotary actuators can be used, linear motion can be converted into rotational motion, or a telescopic actuator can be used as shown in the fifth embodiment. .

  In the engine oil reduction structure configured as described above, when the engine 10 is started, the engine oil leaked from the oil seal 14 drops in the direction of arrow A in FIG. 7 as shown in FIG. Here, when the engine oil is not stored in the tray 21 and the float 77 is at a position lower than the specified height, the motor 74 rotates the on-off valve 73 forward, and the communication hole 12a is closed. As described above, when the engine oil is not stored or is small, the on-off valve 73 closes the communication hole 12a and the engine oil is stored in the tray 21.

  When the engine oil is stored in the tray 21 and the float 77 rises to the set height, the motor 74 rotates the on-off valve 73 rearward (in the direction of arrow B in FIG. 7) to open the communication hole 12a. That is, the tray 21 and the crankcase 17 are communicated with each other through the communication hole 12a, and the engine oil stored in the tray 21 flows in the direction of the oil pan 12 (direction of arrow C in FIG. 7) through the communication hole 12a and is reduced. It is.

  In this way, the motor 74 for opening and closing the on-off valve 73 is connected to the control means 75, the motor 74 is connected to the float switch 76, and when the set amount is exceeded, the motor 74 is operated to open the on-off valve 73, and below the set amount. Then, it is controlled to close. As a result, when a predetermined amount of engine oil has accumulated in the tray 21, it returns to the oil pan 12 and does not overflow from the tray 21.

The rear perspective view of the engine oil collection structure concerning Example 1 of the present invention. The rear perspective view of the engine oil collection structure which concerns on Example 2 of this invention. (A) is a schematic sectional side view of the engine oil reduction structure which concerns on the engine drive state of Example 3, (b) is a schematic sectional side view similarly concerning an engine stop state. (A) is a schematic sectional side view of the engine oil reduction structure which concerns on the engine drive state of Example 4, (b) is a schematic sectional side view similarly concerning an engine stop state. FIG. 10 is a schematic side sectional view of an engine oil reduction structure according to Embodiment 5 of the present invention. The schematic sectional side view of the engine oil reduction structure according to Example 6 of the present invention. The schematic sectional side view of the engine oil reduction structure according to Example 7 of the present invention. The cylinder block rear surface perspective view which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine 11 Cylinder block 12 Oil pan 12a Communication hole 13 Oil seal housing 14 Oil seal 15 Crankshaft 16 Flywheel 21 Sauce tray 22 Anti-scattering frame 33 On-off valve

Claims (8)

The crank block is supported by a cylinder block via a bearing and an oil seal,
It is possible to collect engine oil leaking from the oil seal by placing a saucer on the lower outside of the oil seal,
A structure for collecting and reducing engine oil, wherein a return communication mechanism is provided between the tray and the oil pan. The engine oil collecting / reducing structure according to claim 1,
A structure for collecting and reducing engine oil, wherein an anti-scattering frame is formed around the outer periphery of the oil seal, and the tray is disposed below the anti-scattering frame. The engine oil collecting / reducing structure according to claim 1,
The structure for collecting and reducing engine oil, wherein the return communication mechanism includes a communication hole between a tray and an oil pan, and has an open / close valve in the communication hole. The engine oil collecting / reducing structure according to claim 3,
The on-off valve pivotally supports the upper part of a plate-shaped valve body,
A structure for collecting and reducing engine oil, wherein the valve body is disposed outside the communication hole and urged to open outward by an elastic member. The engine oil collecting / reducing structure according to claim 3,
The valve body is connected to a membrane body that is deformed by the pressure of the intake manifold,
Engine oil collection / reduction structure characterized by being configured to close during operation. The engine oil collecting / reducing structure according to claim 3,
The valve body is connected to a telescopic actuator,
A structure for collecting and reducing engine oil, wherein the actuator is connected to a control means, and is controlled so that a valve body is closed during operation and opened when stopped. The engine oil collecting / reducing structure according to claim 3,
The rotation base of the valve body is connected to a rotary actuator,
A structure for collecting and reducing engine oil, wherein the actuator is connected to a control means, and is controlled so that a valve body is closed during operation and opened when stopped. The engine oil collecting / reducing structure according to claim 3,
An actuator for opening and closing the valve body is connected to the control means;
Connecting the actuator to the oil amount detection means;
A structure for collecting and reducing engine oil, wherein the valve is opened by operating an actuator when the amount exceeds a set amount and closed when the amount is less than the set amount.

Images