JP3904631B2 - Internal combustion engine driven pump device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump device that drives a pump by an internal combustion engine, and more particularly, to a pump device driven by an internal combustion engine that supplements intake air from the pump with intake air from an ejector. Such a pump device is used as a generation source of vacuum suction force by suction. For example, it is used in a soil excavation apparatus that uses a vacuum suction force to dig up soil without damaging existing buried objects when digging up soil or the like when installing or repairing underground pipes.
[0002]
Or, if you want to remove the difference water in the pipe to remove the sediment and mud accumulated in the pipe due to the earthquake, etc., or if you want to suck the dust in the pipe as a cleaning prior to the sealing in the pipe, line it in the pipe When sucking resin, when collecting and cleaning silica sand after polishing of pipe fittings and valves by sandblasting, after shot blasting for pipe rust removal, pigs are sucked in the pipe to remove silica sand and rust. In this case, the vacuum suction force is exerted when the parachute and the sponge pig are further sucked in the tube to perform draining, foreign matter removal, or the like.
[0003]
Here, the field of soil excavation in which a pump device driven by an internal combustion engine is used will be described in detail.
In general, a crusher that forcibly hammers a hammer with compressed air or a power shovel that scoops up strongly with a large bucket is used to dig up or raise an asphalt pavement surface. However, these are powerful and have high work efficiency, but have the negative side of producing a large impact sound and noise. In addition, when a buried pipe or the like is already installed in the basement because it is too strong, there is also a problem that inadvertently touching this causes inconvenience such as destruction of the contacted part or extreme deformation. Therefore, a crusher that can be held by hand and a vacuum excavator are also used for excavating in the ground in time, even if it does not have that much excavation capacity, so that the buried pipes and the like are not broken. ing.
[0004]
As such a handy type crusher, one disclosed in Japanese Utility Model Laid-Open No. 59-160174 is known. This crusher is provided with a chisel blade at the tip of a cylindrical body extending downward from the handle portion, and is provided with a passage for sending compressed air supplied from the compressor to the tip of the chisel blade, and a part of the compressed air at the chisel blade portion. It is a thing of the structure which provided the injection port which injects. In addition to mechanical crushing with a flea blade, soil crushing is also performed by blowing or subdividing earth and sand with compressed air injected from the vicinity of the flea blade.
[0005]
Further, as such a vacuum excavator, for example, one disclosed in Japanese Patent Application Laid-Open No. 58-222228 is known. This vacuum excavator includes a suction port for earth and sand at the tip of a vacuum hose communicated with a suction blower. Then, when the worker brings the soil suction port of the hose close to the soil surface to be excavated, the soil is sucked up by the suction force from the blower. Thereby, it is possible to dig up the soil without damaging or destroying the buried object in the soil.
[0006]
These crushers and vacuum suction devices are often used simultaneously. First, when the soil is crushed by a crusher and put into a state suitable for suction, and then the soil is sucked and transferred by a vacuum excavator, the advantages of both can be utilized and work can be performed efficiently. Furthermore, there is a soil excavation device in which a crushing portion and a suction transfer portion are integrated as in the embodiment of Japanese Patent Application No. 3-123040, for example. In this method, both the supply of compressed air to the crushing part and the vacuum suction from the suction transfer part are performed by a pump device driven by an internal combustion engine to dig up the soil.
[0007]
[Prior art]
In such a pump device driven by an internal combustion engine, the engine (internal combustion engine) and the compressor (pump) are usually housed in the same housing, and supply of compressed air and vacuum suction are performed by the engine-driven compressor. ing. At least a vacuum suction force (negative pressure suction force) is generated. That is, in order to function as a generation source of vacuum suction force, at least one compressor or blower is provided, and an engine, not a motor, is provided due to restrictions on received power, and the engine generates rotational force. The compressor is driven.
[0008]
[Problems to be solved by the invention]
However, in such a conventional internal-combustion engine-driven pump device, a built-in engine or compressor is expensive as a large-sized and high-powered one, so that a large-sized one is adopted under certain cost constraints. Cannot be used, and it must be relatively small. For this reason, the vacuum suction force is limited. Alternatively, not only the vacuum suction force but also the supply amount of the pressure gas is limited. Due to this, it has been difficult to raise the efficiency of soil suction transfer work and pipe suction work to a certain level or more.
[0009]
In order to solve this problem, the same applicant has invented Japanese Patent Application No. 7-84210. This was devised and devised focusing on the fact that intake and exhaust of the engine are not effectively used. In short, the intake of the engine is used in addition to the intake of the compressor as a source of vacuum suction force. As a result, the vacuum suction power has been increased. Specifically, the conventional pump device driven by an internal combustion engine, which is a commercial product, is modified by adding a communication pipe or the like for communicating the intake air of the internal combustion engine with the intake air of the pump.
[0010]
By the way, there are relatively few applications in which the pressure gas supply amount and the vacuum suction amount are balanced, and there are many cases where the vacuum suction force is insufficient while the pressure gas remains. In such a case, the surplus pressure gas is released to the atmosphere without being used for work, so it cannot be said that the compressor or the engine is fully utilized. Therefore, it becomes a problem to achieve further enhancement of the vacuum suction force by effectively using the surplus pressure gas.
[0011]
Also, depending on the sucked material, the supernatant contains components that cause engine output decrease and compressor operation failure.Therefore, suction to the intake air of the compressor or engine is required until such substances are sucked out. Sometimes I want to avoid it temporarily. If such a situation can be dealt with, the range of use of the device will be expanded and the product value will be increased. Therefore, it is a further problem to be able to generate a vacuum suction force without relying on the intake air of a compressor or the like.
[0012]
The present invention has been made to solve such a problem, and an object thereof is to enhance a vacuum suction force by a pump device driven by an internal combustion engine.
Another object of the present invention is to expand the suction targets in addition to the enhancement of the vacuum suction force.
[0013]
[Means for Solving the Problems]
About the 1st, 2nd solution means invented in order to solve such a subject, the structure and effect are demonstrated below.
[0014]
[First Solution]
The internal combustion engine-driven pump device of the first solving means (as described in claim 1 at the beginning of the application)
In an internal combustion engine-driven pump device comprising an internal combustion engine, a pump driven by the internal combustion engine, and first communication means for communicating intake air of the pump to a vacuum suction power supply unit such as a negative pressure pipe line,
An ejector for generating a vacuum suction force using the exhaust (all or a part) of the pump as an ejection source;
And a second communication means for communicating the intake air of the ejector with the vacuum suction force supply section.
[0015]
In such an internal combustion engine-driven pump device of the first solution, the ejector performs an intake action by using the pumping air as the ejection source, and a new vacuum suction force is generated. Then, the intake air of the ejector is communicated with the intake air of the pump by the second communication means, and both are supplied to the vacuum suction force supply unit. Thereby, in addition to the vacuum suction force based on the suction of the pump, the vacuum suction force based on the pumping air can be used.
[0016]
Therefore, according to the present invention, it is possible to enhance the vacuum suction force by utilizing the pumping air.
[0017]
[Second Solution]
The internal combustion engine-driven pump device of the second solution means (as described in claim 2 at the beginning of the application) is the first internal-combustion engine-driven pump device, which blocks the communication state of the first communication means ( It is characterized by comprising switching means capable of switching to the state and the reverse direction).
[0018]
In such an internal combustion engine-driven pump device as the second solution means, when the first communication means is maintained in the communication state, the vacuum suction force is also utilized using the pumping gas as described above. Be enhanced. On the other hand, when the first communication means is switched to the shut-off state, the suction side of the pump is temporarily disconnected from the vacuum suction force supply unit, so that the sucked material is prevented from passing through the filter and entering the pump. Can do. During this time, vacuum suction is performed by the ejector. However, since the ejector generally does not have a mechanically movable part, a sealed part, a heat generating part, etc., there are almost no restrictions due to the suction object. As a result, it is possible to process even a sucked object such as a compressor.
[0019]
Therefore, according to this invention, in addition to the enhancement of the vacuum suction force, the suction target can be expanded.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment for implementing the internal combustion engine-driven pump device of the present invention achieved by the first and second solving means will be described.
[0021]
[First Embodiment]
A first embodiment of the present invention (as described in claim 3 at the beginning of the application) is an internal-combustion-engine-driven pump device of the above-described solution, and includes (all or a part of) intake air of the internal-combustion engine. Is provided with a third communication means for communicating with the intake air of the pump.
As a result, the intake air of the internal combustion engine is communicated with the intake air of the pump, so that the vacuum suction force is generated not only by the intake air of the pump or ejector but also by the intake air of the internal combustion engine. Therefore, the vacuum suction force can be further enhanced.
[0022]
[Second Embodiment]
A second embodiment of the present invention (as described in claim 4 at the beginning of the application) is the internal combustion engine-driven pump device of the above-described solution or embodiment,
The ejector replaces the exhaust of the pump with “a part of the exhaust of the pump”, “the whole exhaust of the internal combustion engine”, “a part of the exhaust of the internal combustion engine”, “all of the exhaust of the pump” “All of the exhaust of the internal combustion engine”, “A part of all of the exhaust of the pump and all of the exhaust of the internal combustion engine”, “A part of the exhaust of the pump and all of the exhaust of the internal combustion engine "All of the pump exhaust and part of the exhaust of the internal combustion engine", "All of the pump exhaust and part of the exhaust of the internal combustion engine", And “one part of all of the exhaust gas of the pump and part of the exhaust gas of the internal combustion engine” as an ejection source.
As a result, not only can the vacuum suction force be further increased by exhausting the internal combustion engine, but an appropriate amount of pressure gas can be used to generate the vacuum suction force in accordance with the characteristics to be treated.
[0023]
【Example】
A specific configuration of an internal combustion engine-driven pump device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram of a soil excavating apparatus using the same, and FIG. 2 is an overall schematic diagram thereof.
[0024]
This soil excavation apparatus supplies the pressure gas to the soil crushing unit 10 through the flexible hose 43 accommodated in the soil crushing unit 10, the soil suction unit 20, and the housing 100, and at the same time the soil suction unit 20 through the conduit 53. And a pump device (100) driven by an internal combustion engine for supplying a vacuum suction force.
First, after explaining the soil crushing unit 10 and the soil suction unit 20, the pump device driven by the internal combustion engine will be described in detail.
[0025]
The soil crushing unit 10 is a part obtained by removing the compressed air supply unit from the soil crusher, and crushes the soil using the pressure gas introduced through the flexible hose 43 as a motor drive source and a fumarole source. . For this purpose, the unit 10 introduces a pressure gas into the inner cavity of the cylinder 12 connected to the cylinder 12 at an upper portion thereof, a handle 12 that is gripped by a hand, a cylinder 12 that extends downward therefrom, and the cylinder 12. An introduction pipe 13, an air motor 14 fixed to the tip of the cylinder 12, receiving pressure gas from the cylinder 12 and rotating the rotation shaft 15 using this as a drive source, and fixed to the rotation shaft 15 at the center position and rotated. It is composed of a rotating plate 16. Along with the rotation of the rotating plate 16, the crushing blade 17 provided on the lower surface of the rotating plate 16 circulates and penetrates from the drain port of the air motor 14 to the rotating shaft 15 and the rotating plate 16. Pressure gas is injected below the rotating plate 16 through the hole.
[0026]
The soil suction unit 20 is a unit obtained by removing a vacuum suction force generation / transmission unit from a soil vacuum excavator. The soil suction unit 20 introduces a vacuum suction force through a pipe 53 and sucks and transfers the soil with this force. . For this purpose, the unit 20 includes a suction pipe 22 having a soil suction port 21 at the lower end, and an internal sediment collection chamber 25a and further a filter chamber 25b at the upper end of the suction pipe 22 via the vacuum duct 23. It is comprised with the earth-collecting dust collection part 25 which connected. Then, when vacuum suction is performed via the vacuum suction force inlet 25c provided in the upper part of the filter chamber 25b, a high-speed air flow involving a part of the soil 70 is passed through the suction pipe 22 from the suction port 21. The air is further decelerated to the sediment collection chamber 25a through the cavity 23 and the vacuum duct 23, and fine dust is also removed in the filter chamber 25b to form a clean air flow. However, when the material is decelerated in the sediment collection chamber 25a, The soil that has been sucked and transferred is collected by leaving behind.
[0027]
The pump device (100) driven by the internal combustion engine includes an engine 30 as an internal combustion engine, a compressor 60 as a pump driven by the internal combustion engine, and crushing the pressure gas enhanced by adding the exhaust of the engine 30 to the exhaust gas of the compressor 60. To supply the soil suction unit 20 with a vacuum suction force enhanced by adding the intake air of the engine 30 of the engine 30 to the intake air of the compressor 60 and the high pressure side pipes 41, 42, 43 connected to supply to the unit 10. , Negative pressure side pipes 51, 52, 53 connected to each other, an ejector 101 provided for further enhancing the vacuum suction force using the pressure gas, a switching valve 102 for selectively operating the ejector 101, It is comprised from the switching valve 103 as a switching means which can interrupt | block the communication state of the pipe line 51, the pipe line 52, and the pipe line 53. FIG.
[0028]
The engine 30 operates to generate a rotational force and to drive the compressor 60 by being rotationally driven by this rotational force. For this purpose, the output shaft is connected to the drive shaft of the compressor 60 via a coupling. Has been. The engine 30 is preferably a diesel engine that is relatively resistant to fluctuations in intake / exhaust pressure, and is accompanied by intake and exhaust for internal combustion during operation.
[0029]
The compressor 60 is preferably a reciprocating compressor, a screw compressor, or the like in order to generate a vacuum suction force by intake air and high pressure air by exhalation. In order to extract the crushing capacity of the crushing unit 10 sufficiently, a pressure gas of about 5 to 7 kgf / cm ² (about 0.5 to 0.7 MPa) is desired. This is because it reaches However, even if the discharge pressure is lower than that, it can be driven in accordance with it, so in short, any other type of compressor can be used as long as it can suck air, compress this suction air, and discharge this compressed air. Or any of a blower may be sufficient.
[0030]
The pipe lines 41, 42, and 43 are for supplying exhaust gas from the engine 30 in addition to compressed air from the compressor 60 to the soil crushing unit 10 as pressure gas. Therefore, these pipe lines are a pipe line 41 having one end connected to the tip of the muffler 32 in the engine 30, that is, an exhaust port, a pipe line 42 having one end connected to the discharge port of the compressor 60, and one end being a pipe line 42. And a flexible hose 43 connected to the other end. Then, the other end of the pipe 41 is extended and connected to the pipe 42, and the other end of the flexible hose 43 is connected to the introduction pipe 13 of the soil crushing unit 10. Exhaust gas is also supplied to the soil crushing unit 10. Note that a variable throttle valve is inserted in the atmosphere release portion of the pipe line 41, and the exhaust pressure of the engine 30 is reduced by bypassing the flow rate according to the throttle amount from the pipe line 41 to the atmosphere. It is adjustable so as not to have a significant effect on operation. This value is usually about 4 to 7 kgf / cm ² (about 0.4 to 0.7 MPa) in the case of a diesel engine, for example.
[0031]
The pipes 51, 52, and 53 are for circulating the intake air of the engine 30 in addition to the intake air of the compressor 60 from the soil suction unit 20 as a source of vacuum suction force. Therefore, these pipe lines are a pipe line 51 (an intake pipe line of an internal combustion engine) having one end connected to the tip of the air cleaner 31 in the engine 30, that is, an intake port, and a pipe line having one end connected to the intake port of the compressor 60. 52 (pump suction pipe) and a pipe 53 (vacuum suction power supply pipe; vacuum suction power supply section) having one end connected to the vacuum suction power inlet 25c of the dust collection part 25. ing. The other ends of the pipelines 51, 52, and 53 are connected to each other via the extension channel and a communication pipeline switching valve 103 described below (first and third communication means). As a result, the intake air of the engine 30 communicates with the intake air of the compressor 60, and the vacuum suction force obtained by combining these intake airs is introduced into the soil suction unit 20 through the soil collection part 25 and the vacuum duct 23. ing.
[0032]
The ejector 101 includes a nozzle 101a that ejects the pressure gas at a high speed, and a diffuser 101b that generates a vacuum suction force behind the nozzle 101a by discharging the ejected gas to the atmosphere while expanding at a tapered portion that continues from the throat. (Refer to the partially enlarged cross-sectional detail view in the dashed-dotted ellipse in FIG. 2). And the nozzle 101a and the flexible hose 43 side pipe line are pipe-connected so that a part of the pressure gas sent from the pipe lines 41 and 42 to the flexible hose 43 side is diverted and becomes the ejection source of the nozzle 101a. Yes. Further, the diffuser 101b and the pipe line 53 are also connected by piping so that the vacuum suction force generated by the ejector 101 is also supplied to the soil suction unit 20 (second communication means).
[0033]
The switching valve 102 is a switchable 4-port 2-position switching valve in a conductive / shut-off state, and is inserted in a pipe between the ejector 101 and the pipe lines (43, 53). Thereby, it is possible to select and switch appropriately whether or not the intake air of the ejector is communicated with the vacuum suction force supply unit.
[0034]
The switching valve 103 is a switchable two-port two-position switching valve in a conductive / shut-off state, and is inserted in a pipe between the pipe lines 51 and 52, the pipe line 53, and the ejector 101. Thereby, it is possible to select and switch appropriately whether or not the intake air of the compressor 60 and the engine 30 is communicated with the vacuum suction power supply unit such as the pipe 53.
[0035]
Although illustration and detailed description are omitted, in order to achieve stable operation of the engine 30 and the like with a simple mechanism, the reverse of blocking the flow from the engine 30 side to the compressor 60 side with respect to the pipelines 51 and 52. It is also desirable to provide a stop valve and a pressure control valve that introduces outside air to keep the intake pressure of the engine 30 at or above its minimum intake pressure.
[0036]
The operation in use of the apparatus of this embodiment having such a configuration will be described.
[0037]
When the asphalt or the like above the soil 70 is discharged by a power shovel or the like and the soil 70 covering and burying the buried pipe 80 is exposed, this is the turn of the soil excavator. Then, after retracting the power shovel or the like, the soil excavator is carried to the excavation site by a truck or the like (not shown), and the pump device (100) driven by the internal combustion engine is installed near the excavation hole. In addition, the soil crushing unit 10 is connected to the pump device (100) by the flexible hose 43, and the soil suction unit 20 and the like are further connected to make preparations.
[0038]
Next, in order to perform soil excavation work, that is, to perform soil crushing and soil suction in parallel, one worker holds the handle portion 11 of the soil crushing unit 10 and puts the crushing blade 17 into the soil 70. The other worker holds the suction pipe 22 of the soil suction unit 20 and points the soil suction port 21 toward the soil 70. At this time, the switching valve 102 is set in a shut-off state, and the switching valve 103 is set in a communication state.
[0039]
When the engine 30 is started to operate the compressor 60, compressed air is discharged from the compressor 60 and exhaust gas is discharged from the engine 30. Then, the crushing blade 17 of the soil crushing unit 10 performs a revolving motion using these compressed air and exhaust as a driving source, and also blows toward the soil below the crushing blade 17 using these compressed air and exhaust as a fume source. Is done. Therefore, when one worker manipulates the handle portion 11 to bring the crushing blade 17 into contact with the soil 70, the clot at that portion is rapidly dried by the injection of gas containing high-temperature exhaust gas and at the same time the crushing blade. 17 is mechanically crushed, or mechanically crushed by the crushing blade 17, and at the same time, finely divided and blown off by injection such as exhaust, so that the soil is efficiently crushed. As described above, not only the compressed air from the compressor 60 but also the exhaust of the engine 30 is used as the drive source and the fumarole source. Therefore, the flow rate of the pressure gas is increased compared to the conventional case, and the soil crushing work efficiency is improved. .
[0040]
Further, during the operation of the engine 30 or the like, air is sucked by the compressor 60 and also by the engine 30. Then, a part of the air sucked through the pipe line 53 is sucked into the compressor 60 through the pipe line 52, and the rest is sucked into the engine 30 through the pipe line 51. Then, vacuum suction force is introduced into the soil suction unit 20 using these intake air as a source, and outside air suction is performed from the soil suction port portion 21. Therefore, when the other worker manipulates the suction pipe 22 of the soil suction unit 20 to bring the soil suction port 21 close to the soil crushed by the soil crushing unit 10, the soil is sucked and transferred by the soil suction unit 20. Then, it is collected one after another in the earth and sand collection chamber 25a. Thus, since not only the intake air of the compressor 60 but also the intake air of the engine 30 is used as a source of the vacuum suction force, the vacuum suction force is increased as compared with the conventional case, and the work efficiency of the soil suction transfer is improved.
[0041]
Furthermore, when the work progresses and the crushing work is particularly smooth, the crushed soil is stored. In such a case, the switching valve 103 is left in the communication state, and the switching valve 102 is switched from the shut-off state to the communication state. If it does so, a part of pressure gas sent to the flexible hose 43 side will be supplied to the ejector 101, and also the ejector 101 will produce a vacuum suction force. This vacuum suction force is also added to the vacuum suction force by the compressor 60 and the engine 30 and supplied to the soil suction unit 20 via the pipe line 53. Therefore, since the processing capacity of the soil suction unit 20 is further enhanced, the stored crushed soil is also quickly discharged.
[0042]
In this way, a sufficient vacuum suction force can always be supplied to the soil suction unit 20 by appropriately operating the switching valve 102 to balance the soil crushing unit 10.
Therefore, if the soil 70 appearing from the bottom after crushing and suction is further excavated while the soil crushing unit 10 and the soil suction unit 20 are appropriately moved, the presence of the buried pipe 80 can be confirmed eventually.
[0043]
By the way, during this work, it may be detected that a liquid or the like that is not desired to be sucked into the engine 30 or the compressor 60 is slightly leaked from the buried pipe 80 to the soil 70. In such a case, the switching valve 102 is left in the communication state, and the switching valve 103 is switched from the communication state to the cutoff state. Then, all of the suctioned material that has passed through the soil collection unit 25 from the soil suction unit 20 and has reached the pump device (100) through the pipe 53 is discharged through the switching valve 102 and the ejector 101. Therefore, since the suction can be continued without exposing the engine 30 and the compressor 60 to the sucked material, the periphery of the buried pipe 80 may be further dug down carefully. Thus, the buried pipe 80 can be exposed without damaging the buried pipe 80 and without damaging the pump device itself, and the role of the soil excavating apparatus is completed.
[0044]
Finally, after the engine 30 is stopped, the pump device (100) driven by the internal combustion engine, the units 10, 20 and the like are placed on a truck or the like and removed from the excavation site.
This completes the work by the soil excavator using the pump device driven by the internal combustion engine.
[0045]
【The invention's effect】
As is clear from the above description, in the internal combustion engine-driven pump device of the first solving means of the present invention, a new vacuum suction force is generated based on the exhalation of the pump using an ejector. Thus, there is an advantageous effect that the vacuum suction force can be enhanced.
[0046]
In the internal combustion engine-driven pump device according to the second solving means of the present invention, the vacuum suction force generating source can be switched between the intake air of the pump and the ejector and the intake air of the ejector alone. In addition to strengthening the force, there is an advantageous effect that the suction target can be expanded.
[0047]
Furthermore, in the pump device driven by the internal combustion engine according to the embodiment of the present invention, the suction force of the internal combustion engine is also used to further enhance the vacuum suction force or to suit the quality of the processing target. -There is an advantageous effect that only an appropriate amount can be used.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of a soil excavation device using the pump device for driving an internal combustion engine according to an embodiment of the present invention.
FIG. 2 is an overall schematic diagram thereof.
[Explanation of symbols]
10 Soil crushing unit 20 Soil suction unit 30 Engine (prime motor; internal combustion engine)
31 Air cleaner (intake port)
32 Muffler (exhaust port)
41 High-pressure side pipe 42 High-pressure side pipe 43 Flexible hose pipe 51 Negative-pressure side pipe (intake pipe of internal combustion engine)
52 Negative pressure side pipe (pump intake pipe)
53 Pipeline on the negative pressure side (vacuum suction supply line)
60 Compressor (compression blower; pump)
70 soil 80 buried pipe 100 housing 101 ejector 102 switching valve 103 switching valve (switching means)
101a Nozzle 101b Diffuser

Claims (4)

An internal combustion engine-driven pump device comprising: an internal combustion engine; a pump driven by the internal combustion engine; and first communication means for communicating intake air of the pump to a vacuum suction power supply unit such as a negative pressure line. A pump device for driving an internal combustion engine, comprising: an ejector that generates a vacuum suction force by using the exhaled gas as an ejection source; and second communication means that communicates intake air of the ejector to the vacuum suction force supply unit. 2. The pump device for driving an internal combustion engine according to claim 1, further comprising switching means capable of interrupting a communication state of the first communication means. 3. The pump device for driving an internal combustion engine according to claim 1, further comprising third communication means for communicating intake air of the internal combustion engine with intake air of the pump. The ejector replaces the exhaust of the pump with a part of the exhaust of the pump, the exhaust of the internal combustion engine, the exhaust of the internal combustion engine, the exhaust of the pump and the exhaust of the internal combustion engine. And all of the exhaust of the pump and the exhaust of the internal combustion engine, and all of the exhaust of the pump and the exhaust of the internal combustion engine are all part of the exhaust of the pump. And all of the exhaust of the internal combustion engine, all of the exhaust of the pump and part of the exhaust of the internal combustion engine, and all of the exhaust of the pump and part of the exhaust of the internal combustion engine 4. The internal-combustion-engine-driven pump device according to claim 1, wherein any one of the two is used as an ejection source. 5.

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