JP2004293376A - Lubricating oil supply device for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating oil supply device for engine for enhancing lubricity in starting without complicating the structure. <P>SOLUTION: This lubricating oil supply device for engine supplies lubricating oil stored in an oil pan in operation to respective parts by sucking up the lubricating oil by an oil pump via an oil strainer, and has a check valve 10 for preventing a flow of the lubricating oil returning to the oil pan 2 via the oil strainer 3 from the oil pump when stopping the operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an engine lubricating oil supply device that sucks oil stored in an oil pan by driving an oil pump and circulates the oil to various parts of the engine.
[0002]
[Prior art]
Conventionally, this type of engine lubricating oil supply device includes an oil strainer facing an oil pan. The lubricating oil stored in the oil pan is sucked up by an oil pump via an oil strainer and supplied to various parts of the engine.
[0003]
In a vehicle traveling on a slope or the like, the oil pan bottom is made deep so that the suction port of the oil strainer does not come out of the lubricating oil. However, when the bottom of the oil pan is deepened, the passage length of the oil strainer becomes longer, and the supply of lubricating oil tends to be delayed when the engine is started.
[0004]
The accumulator-type lubricating oil supply device disclosed in Patent Literature 1 includes an accumulator that stores pressurized lubricating oil discharged from an oil pump. Before the engine is started, the solenoid valve is opened so that the pressurized lubricating oil in the accumulator is supplied to the lubricating portion of the engine. Thereby, lubricity at the time of starting the engine is ensured.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-120421
[Problems to be solved by the invention]
However, in such a conventional lubricating oil supply device for an engine, it is necessary to interpose a pressure accumulator or an electromagnetic valve in a passage for supplying the lubricating oil, resulting in a problem that the structure becomes complicated. .
[0007]
The present invention has been made in view of the above problems, and has as its object to provide a lubricating oil supply device for an engine that can improve lubricity at the time of starting without complicating the structure.
[0008]
[Means for Solving the Problems]
The first invention is applied to an engine in which lubricating oil stored in an oil pan is sucked up by an oil pump through an oil strainer and supplied to each part.
[0009]
Further, a check valve is provided for stopping the flow of the lubricating oil returning from the oil pump to the oil pan through the oil strainer when the operation is stopped.
[0010]
In a second aspect based on the first aspect, the check valve locks the valve body that opens and closes the oil strainer, a shaft protruding downward from a central portion of the valve body, and a fall of the shaft part. Guide means.
[0011]
In a third aspect based on the first aspect, the check valve includes a valve body that opens and closes the oil strainer, and a guide rod that passes through a central portion of the valve body, and the guide rod is provided inside the oil strainer. It was fixed.
[0012]
In a fourth aspect based on the first aspect, the check valve comprises a valve element for opening and closing the oil strainer, a hinge arm projecting from the valve element, and a hinge pin for supporting the hinge arm so as to be rotatable around a horizontal axis. It was provided with.
[0013]
In a fifth aspect based on the first aspect, the check valve includes a valve element for opening and closing the oil strainer, and a shaft for rotatably supporting a central portion of the valve element.
[0014]
In a sixth aspect based on any one of the first to fifth aspects, a tank is provided downstream of the check valve and connected to the oil strainer for storing lubricating oil.
[0015]
Function and Effect of the Invention
In the first invention, when the operation of the engine is stopped, the check valve closes, and the flow of the lubricating oil returned to the oil pan by flowing back through the oil strainer is stopped. Thus, while the engine is stopped, the state in which the lubricating oil is stored in the oil passage is maintained.
[0016]
When the engine is started, the check valve opens with the operation of the oil pump, and the lubricating oil stored in the oil passage is immediately supplied to the lubricating portion of the engine, thereby preventing poor lubrication.
[0017]
In the second invention, the large inclination of the valve body is locked by the guide means of the shaft portion, and the smooth opening and closing operation of the check valve is maintained.
[0018]
In the third aspect, the guide rod is locked by the guide rod from being largely inclined, and the smooth opening and closing operation of the check valve is maintained.
[0019]
In the fourth aspect of the invention, the structure of the check valve is simplified by rotating the valve body about the hinge pin via the hinge arm to open and close.
[0020]
In the fifth invention, the structure of the check valve is simplified by the valve element rotating around the shaft and opening and closing.
[0021]
In the sixth aspect, when the engine is started, the lubricating oil stored in the oil strainer and the tank is immediately sucked up by the oil pump as the oil pump operates, thereby preventing poor lubrication.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0023]
First, FIG. 1 shows an example of an engine to which the present invention can be applied. The lubricating oil suction device of the engine 1 includes an oil strainer 3 facing the oil pan 2. The lubricating oil stored in the oil pan 2 removes large debris by an oil screen 8 as shown by an arrow in the figure, is sucked up by an oil pump 4 through a suction passage 9, and is supplied from an oil filter 5 and an oil cooler 6 to a supply passage 7. And is supplied to each part of the engine 1.
[0024]
The present invention provides a check valve for stopping the flow of lubricating oil returning to the oil pan 2 through the supply passage 7, the oil pump 4, the suction passage 9, and the oil strainer 3 when the operation of the engine 1 is stopped. The lubricating oil stored in the oil strainer 3 is sucked by the oil pump 4, and the lubricating oil is quickly supplied from the oil pump 4 to each part of the engine 1.
[0025]
In the following, embodiments of the check valve shown in FIG.
[0026]
The check valve 10 shown in FIGS. 2 and 3 is mainly composed of a seat portion 3b having an opening 3c and a valve body 11 seated on the seat portion 3b.
[0027]
The valve element 11 is housed in an enlarged diameter portion 3a in which the lower end of the cylindrical oil strainer 3 is enlarged. The disk-shaped sheet portion 3b is formed by squeezing the tip of the oil strainer 3, and a suction port 3c is opened in the sheet portion 3b. The present invention is not limited to this, and the seat portion 3b may be formed separately from the oil strainer 3, and the valve body 11 may be interposed in the oil strainer 3 and then assembled.
[0028]
An oil screen 8 is attached to a lower end of the oil strainer 3, and the suction port 3 c is covered with the oil screen 8.
[0029]
An annular metal seal plate 12 is interposed between the valve body 11 and the seat portion 3b, and a rubber material 13 is attached to the seal plate 12. When the valve is closed, the seat portion 3b comes into close contact with the rubber material 13, so that the sealing performance is improved. The present invention is not limited to this, and the seal plate 12 and the rubber material 13 may be eliminated.
[0030]
The disk-shaped valve body 11 has a cylindrical annular convex portion 11a formed on the outer periphery thereof. On the other hand, a cylindrical annular convex portion 3d is formed on the inner periphery of the seat portion 3b of the oil strainer 3. When the valve is closed, the annular projection 11a and the annular projection 3d are engaged with each other, so that the sealing performance is improved. The invention is not limited thereto, and the valve body 11 and the seat portion 3b may be formed in a flat plate shape by eliminating the annular protrusion 11a and the annular protrusion 3d.
[0031]
A shaft portion 11b projecting downward perpendicularly from the center of the valve body 11 is formed, and a stopper portion 11c extending perpendicularly to the shaft portion 11b and extending in a T-shape is formed. When the stopper 11c abuts on the lower surface side of the seat portion 3b when the valve body 11 is lifted, the valve body 11 is prevented from lifting further.
[0032]
The stopper 11c is formed in a plate shape having a rectangular cross section. The present invention is not limited to this, and the stopper 11c may be formed in a rod shape having a circular cross section.
[0033]
Guide means is provided for inserting the shaft portion 11b and locking the shaft portion 11b with respect to the seat portion 3b. As the guide means, as shown in FIG. 3, four thin wires 15 are stretched in a girder shape in the oil strainer 3, and a shaft portion 11 b of the valve element 11 is inserted between the wires 15. As a result, the shaft 11b is held at the center of the oil strainer 3, and the large inclination of the valve body 11 is locked, so that a smooth opening and closing operation is maintained. The invention is not limited thereto, and the wire 15 may be omitted.
[0034]
The operation as described above will now be described.
[0035]
When the engine 1 is operating, the check valve 10 is opened by the valve body 11 lifted from the seat portion 3b, and the lubricating oil stored in the oil pan 2 flows into the oil strainer 3 from the suction port 3c, and the oil is removed. The oil is sucked up by the oil pump 4 through the strainer 3 and supplied to each part of the engine 1.
[0036]
When the engine 1 is stopped, the check valve 10 is closed with the valve body 11 sitting on the seat portion 3b due to gravity. Thereby, the state where the lubricating oil is stored in the oil strainer 3 and the oil passage is maintained.
[0037]
When the engine 1 is started, the lubricating oil stored in the oil passage is immediately supplied to the lubricating portion of the engine 1 as the oil pump 4 operates, thereby preventing poor lubrication.
[0038]
Next, another embodiment shown in FIG. 4 is to provide a poppet type check valve 10 in the oil strainer 3.
[0039]
In the middle of the oil strainer 3, there is formed a seat portion 3g which is squeezed in a conical cylindrical shape.
The conical cylindrical valve body 41 is seated on the seat portion 3g via an annular seal member.
[0040]
A shaft portion 41b protruding downward from the central portion of the valve body 41, and guide means for locking the shaft portion 41b from falling down are provided. As this guiding means, a ring 44 is connected to the lower end of the shaft portion 41b via a wire mesh 43, and this ring 44 is in sliding contact with the inner peripheral surface of the oil strainer 3.
[0041]
A wire mesh stopper 45 is provided above the valve body 41 in the oil strainer 3. When the valve element 41 comes into contact with the wire netting 42, the lift amount of the valve element 41 is regulated. However, the present invention is not limited thereto, and the lift amount of the valve body 41 may be restricted by the ring 44 abutting on the conical inclined surface 3 h of the oil strainer 3.
[0042]
Also in this case, the check valve 10 is opened / closed by the elevation of the valve body 41, so that the structure is simplified.
[0043]
Next, in another embodiment shown in FIG. 5, a guide rod 51 is mounted inside the oil strainer 3 and a disc-shaped valve body 52 through which the guide rod 51 is inserted is provided.
[0044]
The guide rod 51 is fixed to the opening of the oil strainer 3 via a wire mesh support member 53. A conical seat portion 54 is provided at the base end of the guide rod 51. The valve body 52 has a conical surface 55 that sits on the seat portion 54.
[0045]
A wire net-like stopper 54 is fixed to the distal end of the guide rod 51, and the lift amount of the valve body 52 is regulated via the stopper 54.
[0046]
Also in this case, the check valve 10 is opened / closed by the elevation of the valve body 52, and the structure is simplified.
[0047]
Next, another embodiment shown in FIG. 6 will be described. The same components as those of the above-described embodiment are denoted by the same reference numerals.
[0048]
The disc-shaped valve element 21 has a hinge arm 21a that protrudes radially from an outer peripheral end thereof, and a tip end of the hinge arm 21a is supported via a hinge pin 22 so as to be rotatable around a horizontal axis.
[0049]
An annular seal member 23 is attached to the lower surface of the valve body 11, and the seal member 23 is seated on the annular protrusion 3c of the seat portion 3b.
[0050]
In this case, the check valve 10 is opened and closed by rotating the valve body 21 about the hinge pin 22 via the hinge arm 21a, thereby simplifying the structure.
[0051]
Next, in another embodiment shown in FIG. 7, a butterfly type check valve 10 is provided in the oil strainer 3.
[0052]
The disc-shaped valve element 31 is supported so as to be rotatable around a horizontal axis via a shaft 32 that penetrates a central portion thereof.
[0053]
Inside the oil strainer 3, stoppers 33, 34 for projecting the outer peripheral end of the valve body 31 project.
[0054]
The valve body 31 is provided with a weight 35, and the weight of the weight 35 causes the stoppers 33 and 34 to be seated. The invention is not limited thereto, and the valve body 31 may be seated on the stoppers 33 and 34 by the urging force of the spring.
[0055]
In this case, the check valve 10 is opened and closed by rotating the valve element 31 about the shaft 32, thereby simplifying the structure.
[0056]
Next, another embodiment shown in FIG. 8 will be described. The same components as those of the above-described embodiment are denoted by the same reference numerals.
[0057]
A check valve 10 is provided at the opening of the oil strainer 3, and a tank 61 is connected to the oil strainer 3 downstream of the check valve 10 and stores the lubricating oil.
[0058]
The tank 61 has a predetermined volume and communicates with the oil strainer 3 via an inlet 62 and an outlet 63.
[0059]
The bottom of the tank 61 is fixed to the shallow bottom of the oil pan 2 via a plurality of support members 64. Thereby, the support strength of the oil strainer 3 can be increased.
[0060]
When the engine 1 is stopped, the check valve 10 is closed, so that the state in which lubricating oil is stored in the oil strainer 3 and the tank 61 is maintained.
[0061]
When the engine 1 is started, the lubricating oil stored in the oil strainer 3 and the tank 61 is immediately sucked up by the oil pump 4 with the operation of the oil pump 4, and poor lubrication can be prevented.
[0062]
It is apparent that the present invention is not limited to the above-described embodiment, and that various changes can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an engine to which the present invention is applied.
FIG. 2 is a sectional view of a check valve according to the embodiment of the present invention.
FIG. 3 is a perspective view of the same.
FIG. 4 is a cross-sectional view of a check valve showing another embodiment.
FIG. 5 is a sectional view of a check valve according to another embodiment.
FIG. 6 is a sectional view of a check valve according to another embodiment.
FIG. 7 is a sectional view of a check valve according to another embodiment.
FIG. 8 is a sectional view of an oil strainer and the like showing another embodiment.
[Explanation of symbols]
2 Oil Pan 3 Oil Strainer 3b Seat 10 Check Valve 11 Valve 11b Shaft 11c Stopper 15 Wire 21 Valve 22 Hinge Pin 31 Valve 32 Shaft 41 Valve 41b Shaft 51 Guide Rod 52 Valve 61 Tank

Claims (6)

In an engine that pumps lubricating oil stored in an oil pan through an oil strainer with an oil pump and supplies it to each part,
A lubricating oil supply device for an engine, comprising: a check valve for stopping a flow of lubricating oil returning from the oil pump through the oil strainer to the oil pan when the operation is stopped. The check valve includes a valve body for opening and closing the oil strainer, a shaft projecting downward from a central portion of the valve body, and guide means for locking the shaft to fall. The lubricating oil supply device for an engine according to claim 1. The said check valve was provided with the valve body which opens and closes the said oil strainer, and the guide rod which penetrates the center part of this valve body, and fixed this guide rod inside the oil strainer. The lubricating oil supply device for an engine according to the above. The non-return valve includes a valve body that opens and closes the oil strainer, a hinge arm protruding from the valve body, and a hinge pin that supports the hinge arm so as to be rotatable around a horizontal axis. Item 2. An engine lubricant supply device according to Item 1. The lubricating oil supply for an engine according to claim 1, wherein the check valve includes a valve body that opens and closes the oil strainer, and a shaft that rotatably supports a central portion of the valve body. apparatus. The lubricating oil supply device for an engine according to any one of claims 1 to 5, further comprising a tank connected to the oil strainer downstream of the check valve to store lubricating oil.

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