JPH0416603B2 - - Google Patents

Abstract

PURPOSE:To supply oil free from the delay from the initial period of operation by storing a large quantity of oil into an oil storage chamber from the first pump chamber independently of the quantity which is metered in the second pump chamber and supplied into an engine and by allowing said oil to be sucked into the second pump chamber. CONSTITUTION:When a worm gear 4 is revolved through the engine revolution, a cam 8 revolves, and a plunger body 11 moves vertically in reciprocation, and the oil in an oil tank A is supplied into the first pump chamber P1 from an oil suction passage 12 through an oil selecting passage 18, and then discharged into an oil storage chamber 13 through the oil selecting passage 18 and an oil discharge passage 16. While, in the second pump chamber P2, the oil in the oil storage chamber 13 is sucked through an oil suction passage 19, and a constant quantity of oil is supplied into an engine C through an oil discharge passage 20 and an oil discharge passage 14. Since the oil discharged from the first pump chamber P1 into the oil storage chamber 13 is much than the oil quantity supplied from the second pump chamber P2 to the engine C, the excessive oil is returned into the oil tank A through an oil leak passage 15. Thus, oil can be supplied into the engine free from the delay from the initial period of operation.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to an engine in a separate oil supply system for a two-stroke engine, an intake pipe connecting the engine and a carburetor, an intake path of a carburetor, a float chamber of a carburetor, This relates to a lubricating oil pump for supplying lubricating oil to consuming parts such as motorbikes, etc., and is often used in two-stroke engines installed in motorcycles, outboard motors, etc.

[Conventional technology]

Conventionally, lubricating oil was supplied to two-cycle engines that were commonly used by placing an oil tank below the engine, and using a lubricating oil pump to suck in the oil in the oil tank and discharge it to the consuming parts. This suction and discharge is performed by changing the volume inside the cylinder, which changes according to the movement of a plunger placed inside the cylinder, and the amount of oil sucked into the lubricating oil pump is equal to Matches the amount of oil.

This is because when the engine speed is constant, the plunger's suction and discharge strokes are
Since they are the same, the volume change inside the cylinder is the same, and therefore the amount of oil sucked into the lubricating oil pump matches the amount of oil discharged.

In a low speed range such as when the engine is idling, the amount of oil supplied to the consumption parts can be as small as, for example, 1 c.c. per hour; if a larger amount than this specified amount is supplied, the engine During combustion, the exhaust gas contains a large amount of white smoke, causing a white smoke problem.

[Problem to be solved by the invention]

According to such a conventional lubricating oil pump, the following improvements are desired.

When the engine starts operating when the lubricating oil pump is empty and no oil is stored in it, the oil flow from the oil tank located below to the consumption part first flows into the pump chamber of the lubricating oil pump. The oil in the oil tank is sucked in, and then the oil in the pump chamber is discharged to the engine via the consumption part.

What should be noted here is that, for example, if the condition when starting the engine is low speed rotation, (low speed rotation is preferable to avoid runaway etc. when starting the engine) oil is transferred from the oil tank to the lubricating oil pump. The inhalation is done in very small doses (for example, 1 c.c. 1 hour). Therefore, if the oil tank and the lubricating oil pump are located apart from each other, oil will flow into the lubricating oil pump only after the oil inflow path connecting the oil tank and the lubricating oil pump is filled.

Therefore, during this period, it may not be possible to supply lubricating oil to the engine via the consumption section even though the engine is already in operation. For this reason, in the past, the lubricating oil pump and oil tank were placed close to each other, or the diameter of the oil inflow path was set to the minimum to speed up oil suction.
Furthermore, in order to operate the lubricating oil pump from an empty state, it is necessary to perform a preliminary operation before starting actual work, thereby preventing the engine from seizing up. However, according to this, the degree of freedom in arranging the oil tank was restricted, the degree of freedom in designing the entire engine was reduced, and furthermore, handling was troublesome.

The oil in the oil tank is consumed by engine operation and gradually decreases, and the head difference between the oil level in the oil tank and the suction passage of the lubricating oil pump gradually increases. According to this, the suction of oil into the pump chamber tends to decrease, and the mixture ratio of fuel and oil changes, however slightly, especially during idling operation of the engine, which requires supply of an accurate amount of oil, which is undesirable.

[Means to solve problems]

A lubricating oil pump for a two-stroke engine according to the present invention has been developed in view of the above-mentioned problems, and an object of the present invention is to provide a lubricating oil pump that has a high degree of freedom in arranging the lubricating oil pump and the oil tank and can supply accurate lubricating oil. and a pump body 1 provided with a distributor housing cylinder hole 2 and a cam body housing recess 3 in order to achieve the above-mentioned purpose; and a distributor rotatably housed in the distributor housing cylinder hole 2. 5; It is provided with a rotational force by the worm gear 4 that rotates in synchronization with the output shaft of the engine, and has a cam surface 10 that is in contact with the control rod 22A, and applies rotational force to the distributor 5. The cam body 8; the first cylinder hole 6 and the second cylinder hole continuously bored in the longitudinal axis direction XX of the distributor 5;
cylinder hole 7; a first plunger 11A that is integrally provided with the cam body 8 and is slidably disposed within the first cylinder hole 6; and a first plunger 11A that is slidably disposed within the second cylinder hole 7. A second plunger 11B; a plunger body 11 consisting of; a spring 23 that presses the cam surface 10 of the cam body 8 against the control rod 22A; and an oil provided separately from the distributor storage cylinder hole 2 of the pump body 1; A first pump chamber P1 is formed by a first plunger 11A and a second plunger 11B arranged in the first cylinder hole 6, and a second pump chamber _P1 is formed in the second cylinder hole 7. 2nd pump chamber by 2 plungers 11B
P ₂ is formed, while the distributor 5 has
First pump chamber P ₁ by first plunger 11A
During the suction process, the first pump chamber _P1 and the first oil suction passage 12 connected to the oil tank A are communicated, and during the discharge stroke of the first pump chamber _P1 by the first plunger 11A, the first pump chamber _P1 and an oil storage chamber 13 provided separately in the pump body 1 via a first oil discharge passage 16, and a first oil switching passage 18 that communicates with an oil storage chamber 13 provided separately in the pump body ₁ through a first oil discharge passage 16. a second oil suction path 19 that communicates the storage chamber 13 and the second pump chamber _P2 via the stored oil suction path 17;
Second pump chamber P ₂ by second plunger 11B
During the discharge stroke, a second oil discharge passage 20 is bored which communicates the second pump chamber P ₂ with the third oil discharge passage 14 connected to the consumption part C, and an oil tank A is provided in the oil storage chamber 13. This is a lubricating oil pump for a two-cycle engine having an open oil leak passage 15 communicating with the engine.

[Operation] When the worm gear rotates due to engine operation, the cam body rotates, and as the cam body rotates, the plunger body reciprocates in the vertical direction by the cam surface of the cam body. According to this, the oil in the oil tank is sucked into the first pump chamber from the first oil suction passage through the first oil switching passage, and then the oil in the first pump chamber is sucked into the oil storage chamber from the first oil switching passage. It is discharged.

On the other hand, in the second pump chamber, the oil stored in the oil storage chamber is sucked into the second pump chamber through the second oil suction path, and then from the second pump chamber through the second oil discharge path to the third oil storage chamber. The oil in the second pump chamber is discharged into the oil discharge passage, and the discharged oil is supplied to the consumption section.

Also, since the amount of oil discharged from the first pump chamber into the oil storage chamber is larger than the amount of oil supplied to the engine from the second pump chamber, the remaining oil that is not sucked into the second pump chamber is The oil is returned to the oil tank via the oil leak passage.

〔Example〕

Hereinafter, one embodiment of a lubricating oil pump for a two-stroke engine according to the present invention will be described with reference to FIG.

A is an oil tank that can store lubricating oil (hereinafter referred to as oil) inside, and B is an oil tank that stores lubricating oil (hereinafter referred to as oil) inside the oil tank. It is a lubricating oil pump that measures and supplies oil to consumption parts C such as the intake passage and the float chamber of the carburetor (both not shown), and is generally used in oil tank A.
is located below the lubricating oil pump B.

Lubricating oil pump B will be explained in detail.

Reference numeral 1 denotes a pump body in which a distributor housing cylinder hole 2 is vertically bored, and a cam body housing recess 3 is provided below the distributor housing cylinder hole 2. In addition, a worm gear 4 that rotates in synchronization with engine output (not shown) is rotatably supported in the cam body housing recess 3 and opens.

5 is the distributor storage cylinder hole 2
A destroyer is rotatably fitted into the destroyer storage cylinder hole 2.
The outer portion (above the middle portion in the figure) that is fitted into the cam body has a cylindrical shape, and the lower end portion that projects into the cam body storage recess 3 has a rectangular outer shape. A first cylinder hole 6 having a large diameter (φA) is bored upwardly from the lower end in the longitudinal axis direction XX of the distributor 5, and the diameter of the first cylinder hole 6 is (φA) Smaller diameter (φB)
A second cylinder hole 7 having a diameter is bored continuously from the first cylinder hole 6.

Reference numeral 8 denotes a cam body which is disposed in the cam body storage recess 3 and has a cylindrical outer circumference notched with a parallel gear 9 that meshes with the worm gear 4. A cam surface 10 is formed on the lower surface of the cam body 8. Ru. (The specific profile of the cam surface 10 will be described in the section explaining the function.) The recess 8A of the cam body 8 is formed in a rectangular groove shape so that the rotation of the cam body 8 by the worm gear 4 is transmitted to the distributor 5. and is engaged with the rectangle at the lower end of the distributor 5. Furthermore, a plunger body 11 is installed in the center of the cam body 8 in the direction of the distributor 5 (upward in the figure), and this plunger body 11 moves airtightly into the first cylinder hole 6. It consists of a first plunger 11A that is freely inserted, and a second plunger 11B that is inserted airtightly and movably into the second cylinder hole 7. Here the first
The diameter of the plunger 11A is the second plunger 1
It is larger than the diameter of 1B. (Since it is inserted into the first cylinder hole 6 and the second cylinder hole 7), the first pump chamber P ₁ is formed by the first cylinder hole 6, the upper surface of the first plunger 11A, and the side surface of the second plunger 11B. The second cylinder hole 7 and the second plunger 11B
A pump chamber P ₂ is formed.

In addition, one end of 12 opens into the distributor storage cylinder hole 2 provided in the pump body 1,
a first oil suction passage whose other end is connected to oil tank A; 1;
3 is an oil storage chamber bored in the pump body 1; 14 is a third oil discharge passage whose one end opens into the distributor storage cylinder hole 2 and whose other end is connected to the consumption part C and continues to the engine; 15 is an oil leak passage connecting the oil storage chamber 13 and oil tank A, and 16 is a first oil discharge passage whose one end opens into the oil storage chamber 13 and the other end opens into the distributor storage cylinder hole 2. , 17 are located above the first oil discharge passage 16,
This is a stored oil suction path that opens into the oil storage chamber 13 at one end and opens into the distributor housing cylinder hole 2 at the other end.

Further, the following passage is bored in the distributor 5. That is, in the right cross section of the distributor 5, one end opens to the first pump _P1 , and the rotation of the distributor 5 opens the first oil suction passage 1.
2. A first oil switching passage 18 that blocks the other passage when communicating with one of the first oil discharge passages 16, and a second pump at one end on the left side cross section of the distributor 5. A second oil suction passage 19 opens into the chamber P ₂ and communicates with or closes the stored oil suction passage 17 by rotation of the distributor ₅ ; 5, a second oil discharge passage 20 that communicates with or closes the third oil discharge passage 14 is bored.

Note that it is preferable for the opening of the second oil suction passage 19 to the second pump chamber P ₂ to be located below the opening of the second oil discharge passage 20 to the second pump chamber P ₂ from the viewpoint of removing air from the oil. .

Further, 21 is an upper closing plate disposed at the upper end of the pump body 1 to close the upper opening of the distributor storage cylinder hole 2 and the upper opening of the oil storage chamber 13, and 22 is an upper closing plate of the pump body 1. A lower closing plate is provided with a control rod 22A (specifically, a protrusion formed by press punching) disposed at the lower end to close the lower opening of the cam body storage recess 3 and to come into contact with the cam body 8 and the cam surface 10. be. 23 has one end locked to the distributor 5 and the other end to the cam body 8.
The cam face 10 of the cam body 8 is locked to the control rod 22
This is a spring that presses and biases A.

Next, its effect will be explained based on FIG. 2.

When the engine is operated with the lubricating oil pump B in an empty state, the worm gear 4 rotates in response to the rotation of the output shaft (not shown) of the engine. Worm gear 4
The rotation of is transmitted to the parallel gear 9 that meshes with this,
The cam body 8 rotates. When the cam body 8 rotates, the cam surface 10 of the cam body 8 rotates and moves on the control rod 22A, and according to this, the cam body 8 moves in the vertical direction by the vertical displacement of the cam surface 10. Rotate while moving.

Therefore, the plunger 11 is installed upright from the cam body 8.
It also rotates synchronously with the cam body 8 and reciprocates in the vertical direction. Here, the actual suction and discharge processes in the lubricating oil pump B will be explained in more detail based on FIG. 2, which schematically depicts them.

This second figure shows A, B, C, from the left side of the drawing.
The diagram shows the four steps of (2) and (2), and the top diagram (E) for each process (A, B, C, and D) is an action diagram regarding the second suction passage, and the second diagram F is an action diagram regarding the second oil discharge passage 20. The third figure is an action diagram regarding the oil switching passage 18, and the fourth (bottom) figure is the cam body 8.
This shows the relationship between the cam surface 10 and the control rod 22A. First, the state shown in Figure A shows the suction stroke of the pump.

First, at the start of suction in the suction stroke, the control rod 22A is on the lowest point a of the cam surface 10 in the figure, as shown in FIG. It is also in a position where it has been pushed upwards and moved. Therefore, the first plunger 11A is located in the first cylinder hole 6 and has a smaller volume than the first pump chamber _P1 , and the second plunger 11B is also located in the second cylinder hole 7 and has a smaller volume than the first pump chamber P1. Even if the chamber volume is P ₂ , it is assumed to be a small volume. In this state, the second oil suction passage 19 shown in Fig.
(The state indicated by the solid line is at point a) is communicated with the stored oil suction path 17.

Further, the second oil discharge passage 20 (the state indicated by the solid line at point a) shown in Fig. F is cut off from the third oil discharge passage 14 and is closed.

In addition, the first oil switching passage 18 shown in the figure (the solid line state is at point a) is the first oil suction passage 12.
The first oil discharge path 16 is connected to the first oil discharge path 16 and is closed. A control rod 22A is attached to the point a of the cam surface 10.
A description will be given of the time when the cam body 8 rotates counterclockwise from the disposed state and moves to the uppermost point b of the cam surface 10 through the inclined surface of the cam surface 10.

According to this, the cam body 8 and the plunger body 11
moves downward by a displacement S in the height direction from a to b. During this movement from a to b, the second oil suction passage 19 shown in Fig. E is still in communication with the stored oil suction passage 17, so that the second plunger 11B in the second pump chamber _P2 is transferred to the plunger body 11. In synchronization with this, the pump moves downward and increases the volume of the second pump chamber P ₂ , so that the oil in the oil storage chamber 13 is sucked into the second pump chamber P ₂ through the oil storage suction path 17 .

It should be noted that when the engine is operated for 1 to 2 revolutions immediately after starting, oil is not yet stored in the oil storage chamber 13 than in the first pump chamber _P1 , so suction is not performed, but in the next few revolutions, the oil is immediately absorbed. The first pump chamber is inside the storage chamber 13.
Since oil is stored from P ₁ , this oil is inhaled. (The storage of oil in the oil storage chamber 13 will be described later.) Furthermore, even when the second oil discharge passage 20 shown in FIG. Moreover, since the volume of the second pump chamber P ₂ tends to increase, oil is not discharged from the second oil discharge passage 20 to other areas.

In addition, the first oil switching passage 18 shown in FIG.
When moving from to b, the first oil suction path 1 is always
2 and blocks the first oil discharge path 16, and the chamber volume of the first pump chamber _P1 is equal to that of the first plunger 1.
1A and the second plunger 11B, the oil in the oil tank A is transferred to the first oil suction passage 12.
from the first pump chamber via the first oil switching passage 18.
Inhale within P ₁ .

Next, the diagram will be explained. The figure B shows a play state in which the plunger body 11 does not move in the vertical direction, and the control rod 22 is at the top of the cam surface 10A. Here, the cam body 8 rotates counterclockwise, and the control rod 22 moves from c to d. The height c of this cam surface 10A is the same as the height b, and the heights of the cam surface 10A from c to d are also constant and do not change.

Therefore, the cam body 8 and the plunger body 11 do not move at all in the vertical direction, and the cam body 8, the plunger body 11, and the distributor 5 simply rotate from c to d.

During this rotation from c to d, the second oil suction passage 19 is connected to the stored oil suction passage 17 as shown in Fig.
As shown in Figure F, the second oil discharge passage 20 is also held disconnected from the third oil discharge passage 14, and as shown in Figure G, the first oil switching passage 18 is also maintained. The first oil suction passage 12 and the first oil discharge passage 16 are cut off and maintained.

Next, the state shown in Figure C shows the discharge stroke of the pump.

First, at the start of discharge during the discharge stroke, the control rod 22A is positioned on the highest point e of the cam surface 10 in the figure (this cam surface height is taken as the highest point in Figure A), as shown in FIG. 1, and the cam body 8 and plunger body 11 are in the position where they are originally moved downward in FIG.

When the cam body 8 moves counterclockwise from this state, the cam surface 10 in contact with the control rod 22A moves from e to f, and according to this, the cam body 8,
The plunger body 11 moves upward by a displacement S in the vertical direction between the cam surfaces e and f.

In this state, the second oil suction passage 19 shown in Figure E is cut off from the stored oil suction passage 17, while the second oil discharge passage 20 shown in Figure F communicates with the third oil discharge passage 14 from e to f. Therefore, when the volume of the second pump chamber P ₂ is reduced by the upward movement of the second plunger 11B due to the upward movement of the plunger body 11, the second pump chamber P ₂
The oil sucked in during the suction stroke is transferred to the second oil discharge passage 20.
The oil is supplied to the engine via the third oil discharge path 14.

On the other hand, since the first oil switching passage 18 also communicates with the first oil discharge passage 16 from e to f,
The first movement due to the upward movement of the plunger body 11
When the chamber volume of the first pump chamber P ₁ is reduced by the upward movement of the plunger 11A, the oil sucked into the first pump chamber P ₁ during the suction stroke is transferred from the first oil switching passage 18 to the first pump chamber P 1 . 1 oil is supplied into the oil storage chamber 13 via the oil discharge path 16.

At this time, since the diameter φA of the first cylinder hole 6 forming the first pump chamber P ₁ was made larger than the diameter φB of the second cylinder hole ₇ forming the second pump chamber P 2 , the first pump chamber P ₁ The amount discharged into the oil storage chamber 13 from the oil storage chamber 13 is the second pump chamber P2 _.
The remaining oil is returned to the oil tank A through the oil leak passage 15, although the volume is large compared to the amount sucked into the oil tank A.

Next, Figure 2 will be explained. Figure D shows a play state in which the plunger body 11 does not move in the vertical direction, and the control rod 22A is at the lowest position of the cam surface 10A. Here, the cam body 8 rotates counterclockwise, and the control rod 22 moves from g to h. The height g of this cam surface 10A is the same height h,
The height of the cam surface 10A from g to h remains constant without changing. The height of h is the same as the height of b in Figure A.

Therefore, the vertical movement of the cam body 8 and the plunger body 11 is simply a rotation of the cam body 8, the plunger body 11, and the distributor 5 from g to h.

During this rotation from g to h, as shown in Figure E, the second oil suction passage 19 is connected to the stored oil suction passage 1.
As shown in Figure F, the oil discharge passage 20 in Figure 2 is isolated from the third oil discharge passage 14, and as shown in Figure G, the first oil switching passage 18 is connected to the first oil intake passage 12, Both first oil discharge passages 16 are shut off.

Then, when it is further rotated counterclockwise, the state shown in Fig. A mentioned above is returned again, and each pump chamber P ₁ , P ₂
The process moves on to the suction process, in which oil is sucked into the inside of each cylinder.

Note that the above explanation was based on a state in which the inside of the lubricating oil pump B was completely empty, so oil could not be sucked into the second pump chamber _P2 at the very beginning, but one cycle of suction and discharge is performed. As a result, a large amount of oil is immediately supplied into the oil storage chamber 13 from the first pump chamber _P1 , so there is no problem.

Also, although an idle stroke is provided between the suction and discharge strokes of the pump, it is not necessarily necessary.
Furthermore, the discharge amount of the lubricating oil pump of this embodiment is determined only by the rotation of the cam body 8;
It is also possible to apply so-called slot control, which is linked to the engine load by rotating 2A.

〔Effect of the invention〕

As described above, the lubricating oil pump for a two-stroke engine according to the present invention has the following effects.

The amount of oil sucked into the lubricating oil pump is completely independent of the amount calculated by the second pump chamber and supplied to the engine. Since oil can be sucked into two pump chambers, the pump can be pumped extremely quickly, especially when the engine is started and oil is not accumulated in each passage, for example, during the first operation after the engine has been left unused for a long time. Since the chamber and each passage can be filled with oil, oil can be supplied to the engine without delay from the initial state of engine operation, and good operability of the engine can be maintained.

Additionally, it is no longer necessary to place the oil tank near the lubricating oil pump and the engine, which greatly improves the degree of freedom in designing the entire engine.

The second pump chamber sucks a large amount of oil in the oil tank, supplies the desired oil to the first pump chamber, and returns the remaining oil to the oil tank.
Even if air bubbles were to occur in the flow path, the air bubbles could be returned to the oil tank by the flow of a large volume of oil, making it possible to completely prevent air locks from occurring in the flow path. Since a large amount of oil flows through the pump body, the pump body is cooled and the temperature rise in the pump body can be suppressed, and the generation of air bubbles can also be prevented.

After the engine stops, it is expected that the oil remaining in the lubricating oil pump, especially in the second pump chamber, will return to the oil tank located in the lower position.
Since the return of oil in the lubricating oil pump is doubly suppressed in the first oil switching passage, oil can be immediately supplied to the engine upon restart.

The suction of oil into the second pump chamber, which supplies metered oil to the engine via the consumption part, sucks oil that has been stored in the oil storage chamber in advance, so if the oil level in the oil tank is consumed, Even when the pump is lowered by the pump, only the stored oil can be sucked into the second pump chamber, so the suction head can always be kept constant, and an accurate amount of oil can be pumped out through the consuming part. It was possible to supply this to the organization.

Since the oil leak passage is opened at the top of the oil storage chamber, the air in the oil storage chamber can be effectively returned to the oil tank, preventing air from being sucked into the second pump chamber, making the discharge amount uniform. It can be controlled.

By arranging the opening position of the second oil suction passage to the oil storage chamber via the stored oil suction passage below the opening position of the oil leak passage to the oil storage chamber, the air in the oil storage chamber is Inhalation into the room is prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part showing an embodiment of a lubricating oil pump for a two-stroke engine according to the present invention, and FIG. 2 is a simplified operational diagram showing the suction and discharge strokes of the pump. 1... Pump body, 2... Distributor storage cylinder hole, 3... Cam body storage recess, 4...
... Worm gear, 5 ... Distributor, 6
...First cylinder hole, 7...Second cylinder hole, 8...Cam body, 10...Cam surface, 11...Plunger body, 11A...First plunger, 1
1B...Second plunger, 12...First oil suction passage, 13...Oil storage chamber, 14...Third oil discharge passage,
16...First oil discharge path, 17...Stored oil suction path,
18...First oil switching passage, 19...Second oil suction passage, 20...Second oil discharge passage, C...Consumption part, A...
…Oil tank, B…Lubricating oil pump, P ₁ …1st
Pump room, P ₂ ...Second pump room.

Claims (1)

[Scope of Claims] 1. A pump body 1 provided with a destroyer housing cylinder hole 2 and a cam body housing recess 3; A destroyer 5 rotatably housed in the destroyer housing cylinder hole 2; ; A cam body that is provided with a rotational force by the worm gear 4 that rotates synchronously with the output shaft of the engine, has a cam surface 10 that contacts the control rod 22A, and that applies rotational force to the distributor 5. 8; a first cylinder hole 6 and a second cylinder hole continuously bored in the longitudinal axis direction XX of the distributor 5;
a first plunger 11A that is integrally provided with the cam body 8 and is slidably disposed within the first cylinder bore 6; a first plunger 11A that is slidably disposed within the second cylinder bore 7; 2: a plunger body 11 consisting of a plunger body 11; a spring 23 that presses the cam surface 10 of the cam body 8 against the control rod 22A; an oil reservoir provided separately from the pump body 1 and the distributor housing cylinder hole 2; The chamber 13 and the first cylinder hole 6
The first plunger 11A and the second plunger 11B arranged in the inner cylinder form a first pump chamber _P1 , and the second plunger 11B arranged in the second cylinder hole 7 forms a second pump chamber P1. On _the other hand, the distributor 5 has a first pump chamber formed by the first plunger 11A.
During the suction stroke of P ₁ , the first pump chamber P ₁ and oil tank A
and an oil reservoir chamber 13 provided separately in the first pump chamber P 1 and the pump body ₁ during the discharge stroke of the first pump chamber P ₁ by the first plunger 11A. The oil storage chamber 13 and the second pump chamber _P2 are connected to each other during the suction stroke of the second pump chamber _P2 by the second plunger 11B. A second oil suction path 19 communicating via the suction path 17
and a second pump chamber by the second plunger 11B.
During the discharge stroke of _P2 , a second oil discharge passage 20 is bored which communicates the second pump chamber _P2 with the third oil discharge passage 14 connected to the engine via the consumption part C, and an oil storage chamber is also provided. Reference numeral 13 denotes a lubricating oil pump for a two-stroke engine, which has an oil leak passage 15 communicating with the oil tank A. 2 The discharge amount of the first pump chamber _P1 is the second pump chamber _P2
2. The lubricating oil pump for a two-cycle engine according to claim 1, wherein the pump has a large discharge amount compared to the discharge amount of the pump. 3. Claim 1, wherein the diameter of the first plunger 11A is larger than the diameter of the second plunger 11B.
Lubricating oil pump for the two-stroke engine described in Section 2. 4. The lubricating oil pump for a two-cycle engine according to claim 1, wherein the oil reservoir chamber 13 is integrally provided in the pump body 1. 5. The lubricating oil pump for a two-cycle engine according to claim 1, wherein the oil leak passage 15 is opened at the upper part of the oil storage chamber 13. 6 Adjust the opening position of the second oil suction passage 19 to the oil storage chamber 13 via the stored oil suction passage 17 to the oil leak passage 1.
The lubricating oil pump for a two-cycle engine according to claim 1, wherein the lubricating oil pump for a two-stroke engine is opened downward from the opening position to the oil storage chamber 13 of No. 5. 7. A lubricating oil pump for a two-cycle engine according to claim 1, wherein the plunger body 11 is integrally formed with the first plunger 11A and the second plunger 11B and arranged on the same axis.