JP2007056743A - Gas engine and gas engine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas engine and a gas engine generator capable of reducing amount of remaining fuel liquid and realizing excellent mounting work efficiency of a liquefied gas cylinder and excellent ease of use during operation for many hours. <P>SOLUTION: This gas engine generator 1 equipped with the gas engine 3 is provided with the liquefied gas cylinder 30, the engine 40 driven by using liquefied gas supplied from it as fuel, and the generator 50 operating by receiving power from the engine. The liquefied gas cylinder 30 is vertically arranged by letting a fuel outlet face downward. This gas engine generator has a mounting part 60 for mounting the liquefied gas cylinder 30 and a front cylinder cover 13 covering the front sides of the mounting part 60 and the liquefied gas cylinder 30 mounted in the mounting part so as to expose them on a front side of a case. An upper side of this cover can tilt and move in the forward and backward directions. A cylinder attitude holding mechanism 70 is provided on an inner side of an upper part of the front cylinder cover 13. A cock capable of connecting a supply pipe linked to a propane gas cylinder provided on an outer side of the case with a connection part connected with the mounting part 60 is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gas engine provided with an engine that drives liquefied gas supplied from a liquefied gas cylinder as fuel, and a gas engine generator.

  Such a gas engine or the like uses a liquefied gas cylinder consisting only of liquefied fuel gas, and, as described in Patent Document 1, a liquefied gas cylinder storing a mixed liquid of liquefied fuel gas and lubricating oil (in the literature, In some cases, a liquid mixture is led out from a fuel cylinder and supplied to a combustion chamber of an engine. A commercially available liquefied gas cylinder is used. Since this liquefied gas cylinder has a predetermined size, only a predetermined amount of fuel liquid is stored in the cylinder. For this reason, when the operating time of the engine becomes long, it is troublesome to change the cylinder many times, and it is necessary to enable the cylinder to be replaced with a simple operation.

  Therefore, as described in Patent Document 2, a cylinder holder is provided which extends in the lateral direction at the lower part of the engine (small gas engine in the literature) and is open at one end side to which a liquefied gas cylinder (gas cylinder in the literature) can be inserted. There has been proposed one in which a cap that covers the bottom of a liquefied gas cylinder exposed from the cylinder holder in a state where the liquefied gas cylinder is inserted into the cylinder holder can be attached to the cylinder holder.

Japanese Utility Model Publication No. 7-17948 JP-A-10-169511

  The above is configured such that the liquefied gas cylinder is disposed sideways and is held by the cylinder holder, and the front end of the gas suction pipe provided in the liquefied gas cylinder is bent downward and the inner surface of the body of the liquefied gas cylinder The structure extends to the side so that the fuel liquid in the liquefied gas cylinder can be derived. Here, since it is difficult to lead out the fuel liquid if the tip of the gas suction pipe is too close to the inner surface of the body, a predetermined gap is provided between the tip of the gas suction pipe and the inner surface of the body, When the amount of fuel liquid in the liquefied gas cylinder decreases, the tip of the gas suction pipe is exposed to the gas layer above the liquid level of the fuel liquid, gas is led out, and the supply of fuel liquid to the engine decreases. It may be difficult to start the engine. The fuel liquid remaining between the front end of the gas suction pipe and the inner surface of the body is received by the inner surface of the body of the horizontal liquefied gas cylinder, but the liquefied gas cylinder is long in the axial direction and has a large area on the inner surface of the body. Even if the dimension in the height direction is small, there is a problem that the remaining amount of the fuel liquid increases.

  Also, since the liquefied gas cylinder needs to be inserted into the cylinder holder with the tip of the gas suction pipe inserted into the cylinder facing downward, the direction of the tip of the gas suction pipe from the outside of the liquefied gas cylinder As can be seen, a locking groove extending in the same direction as the extending direction of the gas suction pipe is provided at the tip of the liquefied gas cylinder. The engaging groove engages with an overhanging portion provided inside the front end side of the cylinder holder so that the liquefied gas cylinder can be set in a desired direction. As described above, in order to mount the liquefied gas cylinder in the cylinder holder, it is necessary to insert the locking groove so as to engage with the protruding portion. However, it is possible to visually check the engagement state from the outside of the cylinder holder. There is a problem that it is difficult to mount the liquefied gas cylinder to the cylinder holder.

  Furthermore, since the liquefied gas cylinder has only a predetermined volume, the time during which the gas engine can be operated with one cylinder is short, and when the gas engine is operated for a long time, the liquefied gas cylinder needs to be replaced many times. Combined with the poor workability of the cylinder installation work, there is a problem that the convenience of use of the gas engine is poor.

  The present invention has been made in view of such problems, and the tip of the gas suction pipe is not exposed earlier than the liquid level of the fuel liquid at an early stage, the remaining amount of the fuel liquid is small, and the liquefied gas cylinder is provided. An object of the present invention is to provide a gas engine and a gas engine generator that are easy to mount and easy to use when the gas engine is operated for a long time.

  In order to solve such problems, the present invention provides a liquefied gas cylinder that stores liquefied gas and a gas engine in which an engine that drives liquefied gas supplied from a fuel outlet of the liquefied gas cylinder as fuel is housed in a case. The liquefied gas cylinder is arranged vertically with the fuel outlet facing downward.

  According to the present invention, by disposing the liquefied gas cylinder in a vertical position with the fuel outlet facing downward, the tip of the gas suction pipe provided in the liquefied gas cylinder as compared with the case where the liquefied gas cylinder is installed sideways. The volume below the part can be reduced. For this reason, the amount of liquefied gas stored below the tip of the gas suction pipe can be reduced, and as a result, the tip of the gas suction pipe is not exposed above the liquid level of the liquefied gas at an early stage. The remaining amount of liquefied gas can be reduced.

  Further, the case of the present invention has a mounting portion that is disposed in the case and detachably mounts a fuel outlet of the liquefied gas cylinder so as to communicate with the engine, and at least the front side of the liquefied gas cylinder mounted on the mounting portion is exposed. It includes a cylinder cover portion (for example, the front cylinder cover 13 in the embodiment) that covers it as possible.

  According to the present invention, the case includes the mounting portion and the cylinder cover portion that covers the liquefied gas cylinder attached to the mounting portion so as to be exposed from at least the front side of the case, so that when the cylinder cover portion is opened, at least the mounting portion and the liquefied gas cylinder. These front sides are exposed. For this reason, when installing the liquefied gas cylinder to the mounting part, the liquefied gas cylinder can be mounted on the mounting part while visually confirming the mounting part and the tip of the liquefied gas cylinder, and the workability of the mounting operation of the liquefied gas cylinder is improved. be able to.

  Further, the cylinder cover portion of the present invention is disposed on the front side of the mounting portion and the liquefied gas cylinder mounted on the mounting portion and extends in the up-down direction, and the upper side in the front-rear direction through the rotating portion provided in the lower portion. It is possible to tilt it.

  According to the present invention, since the cylinder cover part can be tilted in the front-rear direction via the rotating part, the attachment part and the liquefied gas cylinder attached thereto can be simply moved by moving the upper side of the cylinder cover part in the front-rear direction. The front side can be easily exposed. For this reason, since a mounting part and a liquefied gas cylinder are exposed by simple operation, workability | operativity of the mounting | wearing operation | work of a liquefied gas cylinder can be improved more.

  Further, when the cylinder cover part of the present invention moves to a position that covers the mounting part and the liquefied gas cylinder attached to the mounting part, the bottom part of the liquefied gas cylinder is urged toward the tip side so that the posture of the liquefied gas cylinder is inverted. A cylinder posture holding means for holding (for example, a cylinder posture holding mechanism 70 in the embodiment) is provided.

  According to this invention, when the cylinder cover part moves to a position covering the mounting part and the liquefied gas cylinder, the liquefied gas cylinder is held in an inverted state by the cylinder attitude holding means, whereby the liquefied gas cylinder stored in the case is placed in the case. Can be fixed.

  Further, the mounting portion of the present invention is provided with a cock capable of connecting a supply pipe for supplying gas fuel supplied from a gas fuel supply source installed outside the case, which is separate from the liquefied gas cylinder housed inside the case. It is characterized by providing.

  According to the present invention, when the gas engine is operated for a long time by providing the cock in the mounting portion, the supply pipe connected to the gas fuel supply source installed outside is connected to the cock and the gas fuel supply source is connected. By driving the engine with this gas fuel, the operation time can be extended. When the gas engine is moved, the gas engine can be easily moved by removing the supply pipe from the cock. When the operation time is short, the operation is performed only with the built-in liquefied gas cylinder. Thus, the fuel supply source can be selected according to the operation time, and the complicated liquefied gas cylinder replacement operation when the operation time is long is eliminated, so that the usability of the gas engine can be improved.

  Further, the present invention supplies a fuel pipe that communicates between a mounting portion provided with a cock and an intake passage of a mixer (for example, a pressure regulating mixer 53 in the embodiment) housed in a case from a liquefied gas cylinder. The present invention is characterized in that a flow rate adjusting valve is provided to selectively flow a fuel at a flow rate corresponding to each of the liquefied gas fuel and the gas fuel supplied from the gas fuel supply source.

  According to the present invention, by providing the flow rate adjusting valve in the fuel pipe, it is possible to flow the fuel at an appropriate flow rate according to the selected fuel supply source to the intake passage of the mixer, regardless of the type of the selected fuel. Therefore, the engine can always be operated in a stable state.

  Furthermore, a gas engine generator according to the present invention includes the gas engine according to any one of claims 1 to 6 and a generator driven by the engine of the gas engine.

  According to the present invention, a gas engine generator includes the gas engine according to any one of claims 1 to 6 and a power generator driven by the engine of the gas engine. The gas engine generator is easy to use when operating for a long period of time, because the front end of the fuel is not exposed earlier than the liquid level of the fuel liquid, the remaining amount of the fuel liquid is small, the liquefied gas cylinder is easily mounted Can be provided.

  According to the gas engine and the gas engine generator according to the present invention, the liquefied gas cylinder is arranged vertically so that the fuel outlet faces downward, and the case includes at least the front side of the mounting portion and the liquefied gas cylinder mounted on the casing. By including a cock that can connect a supply pipe for flowing gas fuel supplied from a gas fuel supply source different from the liquefied gas cylinder installed outside the case in the mounting portion, The tip of the gas intake pipe is not exposed above the liquid level of the fuel liquid at an early stage, the remaining amount of the fuel liquid is low, the liquefied gas cylinder is easy to install, and it is easy to use when operating the gas engine for a long time. A gas engine and a gas engine generator can be provided.

  Hereinafter, preferred embodiments of a gas engine and a gas engine generator according to the present invention will be described with reference to FIGS. In the present embodiment, a hand-held gas engine generator will be described as an example. 1 is a perspective view of the gas engine generator, FIG. 2 is an internal structure diagram of the gas engine generator as viewed from the right side, FIG. 5 is a front view of the gas engine generator, and FIG. FIG. 7 is a plan view showing the internal structure of the engine generator, FIG. 7 is a left side view showing the internal structure of the gas engine generator, and FIG. 8 is a perspective view showing a state in which the front cylinder cover is opened.

  As shown in FIGS. 1 and 2, the gas engine generator 1 uses a liquefied gas cylinder 30 for storing liquefied gas in a box-shaped case 10 and liquefied gas supplied from a fuel outlet of the cylinder as fuel. The generator 50 is attached to the gas engine 3 that houses the engine 40 that is driven as follows.

  The liquefied gas cylinder 30 includes a cylinder main body 31 that stores the fuel liquid L and a head 32 that protrudes from the tip of the cylinder main body 31 and is arranged vertically with the fuel outlet facing downward. Is done. A discharge pipe 33 that protrudes from the cylinder main body 31 and forms a fuel outlet at the tip is inserted into the head 32 so as to be pushed in, and an open / close valve (not shown) is provided in the head 32. When the discharge pipe 33 moves to the pushed position, the on-off valve opens. The discharge pipe 33 communicates with a gas suction pipe 34 extending from the inside of the head 32 into the cylinder main body 31. The gas suction pipe 34 extends straight from the head 32 to the bottom side of the cylinder main body 31, and the distal end side is bent in a substantially right angle direction and extends to a position near the inner surface of the peripheral wall of the cylinder main body 31. Therefore, when the on-off valve is opened, the fuel liquid L stored in the liquefied gas cylinder 30 flows through the gas suction pipe 34 and the discharge pipe 33 and is supplied to the mounting portion 60 where the liquefied gas cylinder 30 is mounted. A locking groove (not shown) is formed in the head 32, and the locking groove engages with a locking protrusion described later provided in the mounting portion 60, thereby restricting the rotation of the liquefied gas cylinder 30. Can be set in the state.

  The case 10 that houses the liquefied gas cylinder 30, the engine 40, and the like includes a left side cover 11, a right side cover 12, a front cylinder cover 13, and a rear cover 14. The left side cover 11 and the right side cover 12 are configured symmetrically, and when these are arranged opposite to each other, a space portion 16 that can accommodate the liquefied gas cylinder 30, the engine 40, and the like is formed therein, and a handle that extends in the front-rear direction at the top. A portion 18 is formed, a front opening 20 extending in the vertical direction is formed at the front end, and a rear opening 22 is formed at the rear upper portion. The front opening 20 is formed so as to open the front surface portion of the case 10 and the upper surface portion of the case front side.

  The front cylinder cover 13 covers the front opening 20 that is largely open, and includes a main body 13a that extends in the vertical direction and a front end 13b that is bent from the top of the main body 13a and extends rearward. As shown in FIG. 3A (side view), rotating parts 24 are provided on the left and right sides of the main body part 13a. The rotating part 24 includes a pair of engaging holes 24a provided on both the left and right sides of the main body part 13a, and an engaging shaft 24b provided in the left side cover 11 and the right side cover 12 and inserted through the engaging holes 24a. It is configured. The engagement hole 24a is formed in a so-called long hole shape that extends in the vertical direction. Therefore, the front cylinder cover 13 is rotatable in the front-rear direction and is movable in the vertical direction, and the upper side of the front cylinder cover 13 is tiltable in the front-rear direction. As a result, as shown in FIG. 8, when the front cylinder cover 13 is tilted to open the front opening 20, each front side of the liquefied gas cylinder 30 disposed in the space 16 and the mounting section 60 for mounting the liquefied gas cylinder 30. And the bottom portion of the liquefied gas cylinder 30 can be exposed.

  A pair of locking pins 25 shown in FIG. 4 (side view) are rotatably attached to the left and right sides of the upper end portion of the front cylinder cover 13, and these are provided on the left side cover 11 and the right side cover 12. The front cylinder cover 13 can be locked to the left side cover 11 and the right side cover 12 by engaging with the engagement holes (not shown).

  When the front cylinder cover 13 moves to a position where the front opening 20 closes the front opening 20 (a position that covers the mounting portion 60 and the liquefied gas cylinder 30 attached thereto) inside the front end portion of the front cylinder cover 13, the bottom surface of the liquefied gas cylinder 30. 2, that is, a cylinder posture holding mechanism 70 that holds the liquefied gas cylinder 30 in an inverted state by urging the uppermost portion of the liquefied gas cylinder 30 toward the front end of the cylinder. The cylinder posture holding mechanism 70 includes a contact plate 71 that contacts the bottom surface of the liquefied gas cylinder 30, a guide shaft 72 that guides the vertical movement of the contact plate 71, and the contact plate 71 on the cylinder side. And a compression spring (not shown) for biasing. The front end side of the contact plate 71 has a curved surface 71 a along the bottom surface of the liquefied gas cylinder 30. An insertion hole 71 b through which the guide shaft 72 is inserted is formed at the center of the contact plate 71. The guide shaft 72 is formed such that its diameter gradually decreases as it advances downward. The contact plate 71 is not removed from the guide shaft 72.

  When the locking pin 25 shown in FIG. 4 is locked in an engagement hole (not shown), the front cylinder cover 13 moves downward to cover the front opening 20. At the same time, the guide shaft 72 moves downward, and the contact plate 71 moves downward via the insertion hole 71b. As a result, the abutting plate 71 abuts the bottom portion of the liquefied gas cylinder 30 in a pressed state while being urged downward by the compression spring. For this reason, the liquefied gas cylinder 30 in the inverted state is fixed to the case 10.

  On the other hand, to open the front opening 20, the locking pin 25 shown in FIG. 4 is rotated to release the locking state with the engaging hole, and the front cylinder cover 13 is pulled upward. As a result, as shown in FIG. 3B (side view), the guide shaft 72 moves upward, and the contact plate 71 also moves upward to release the fixation of the liquefied gas cylinder 30. Then, as shown in FIG. 4, when the front cylinder cover 13 is tilted to the front side, that is, the front side in the front-rear direction, the entire front opening 20 is finally opened as shown in FIG. The front side of the part 60 and the bottom part of the liquefied gas cylinder 30 can be exposed.

  As shown in FIG. 5, the front cylinder cover 13 is provided with a power terminal 26, a frequency changeover switch 27, a hole 28 through which the propane gas plug P is inserted, and the like.

  As shown in FIG. 6, the mounting portion 60 described above for detachably mounting the liquefied gas cylinder is provided on the front side of the bottom inside the case 10. A pair of mounting portions 60 are provided at predetermined intervals in the left-right direction, and a connecting portion 61 is attached between the mounting portions 60. A supply channel (not shown) through which the liquefied gas supplied from the liquefied gas cylinder mounted on the mounting unit 60 is formed in the mounting unit 60 and the connection unit 61, and the supply channel is connected to the connection unit 61. Further, the fuel pipe 62 communicates with the fuel pipe 62 shown in FIG. The mounting portion 60 includes a contact portion 63 with which the head 32 of the liquefied gas cylinder 30 contacts. The contact portion 63 is provided with a plurality (four in the drawing) of the above-described locking projections 64 that are disposed at a predetermined interval in the circumferential direction and protrude upward.

  A power generator 50, a fan 52, and an engine 40 are disposed in the space 16 on the rear side of the mounting portion 60. The power generator 50 and the fan 52 are operated by receiving power from the engine 40. As shown in FIGS. 6 and 7, the liquefied gas supplied from the liquefied gas cylinder 30 is vaporized in the middle of flowing through the supply flow path and the fuel pipe 62 and sent to the pressure-regulating mixer 53, so that the gas pressure becomes the specified pressure. The air that has been adjusted and sent to the pressure adjusting mixer 53 through the air cleaner is mixed with the fuel vaporized in the pressure adjusting mixer 53 so as to have an appropriate mixing ratio, enters the cylinder of the engine 40, and burns. The engine 40 is driven and the generator 50 is driven. The electric power generated by the power generator 50 is converted into 50-cycle or 60-cycle alternating current by an inverter 54 attached inside the left side cover 11 after rectification, and supplied to the power terminal 26 shown in FIG.

  Thus, as shown in FIG. 2, the liquefied gas cylinder 30 is arranged vertically with the fuel outlet facing downward, so that the liquefied gas cylinder 30 is compared with the case where the liquefied gas cylinder 30 is installed sideways. The volume below the tip of the gas suction pipe 34 provided inside can be reduced. For this reason, the amount of the liquefied gas fuel liquid L stored below the front end of the gas suction pipe 34 can be reduced, and as a result, the front end of the gas suction pipe 34 is more quickly moved from the liquid level of the fuel liquid L. It is not exposed upward, and the remaining amount of the fuel liquid L can be reduced.

  Further, since the front cylinder cover 13 covers the mounting portion 60 and the liquefied gas cylinder 30 mounted on the front cylinder cover 13 so as to be exposed from at least the front side thereof, when the front opening 20 is opened by the front cylinder cover 13, the mounting portion 60 and the liquefied gas cylinder 30 are covered. The front side of 30 and the bottom side of the liquefied gas cylinder 30 are exposed. Therefore, when the liquefied gas cylinder 30 is mounted on the mounting portion 60, the liquefied gas cylinder 30 can be mounted on the mounting portion 60 while visually confirming the mounting portion 60 and the head 32 of the liquefied gas cylinder 30. The workability of the mounting work can be improved.

  Further, since the front cylinder cover 13 can be tilted in the front-rear direction via the rotating unit 24, the mounting unit 60 and the liquefied gas cylinder 30 mounted on the mounting unit 60 can be simply moved by moving the upper side of the front cylinder cover 13 forward. The front side can be easily exposed. For this reason, since the mounting portion 60 and the liquefied gas cylinder 30 are exposed by a simple operation, the workability of the mounting operation of the liquefied gas cylinder 30 can be further improved.

  As shown in FIG. 6, a connection pipe connected to a gas fuel supply source (not shown) (for example, a propane gas cylinder) installed outside the gas engine generator 1 is connected to the connection portion 61 connected to the mounting portion 60. A cock 66 may be provided. Thus, by providing the cock 66 in the connecting portion 61 connected to the mounting portion 60, when the engine 40 is operated for a long time, a supply pipe connected to a gas fuel supply source installed outside is connected to the cock 66. Driving the engine 40 with gas fuel from the gas fuel supply source can lengthen the operation time. When the engine 40 is moved, the gas engine generator 1 can be easily moved by removing the supply pipe from the cock. When the operation time is short, the operation is performed only with the built-in liquefied gas cylinder 30. Thus, it becomes possible to select the fuel supply source according to the operation time, eliminate the troublesome work of replacing the liquefied gas cylinder when the operation time is long, and improve the usability of the gas engine generator 1 in the long-time operation state. it can.

  When the engine 40 is driven by gas fuel (for example, propane gas) from an external gas fuel supply source, the combustion efficiency differs between propane gas and liquefied gas, so the flow rate is adjusted in the fuel pipe 62 shown in FIG. It is necessary to provide a valve (not shown). The flow rate adjusting valve is configured to selectively flow a fuel having an appropriate flow rate according to each of the liquefied gas fuel supplied from the liquefied gas cylinder 30 and the gas fuel supplied from the gas fuel supply source. By providing such a flow rate adjusting valve, an appropriate flow rate of fuel according to the selected fuel supply source can be caused to flow through the intake passage of the pressure adjusting mixer 53, and the engine can be used regardless of the type of fuel selected. 40 can always be operated in a stable state.

  In the above-described embodiment, an example in which two liquefied gas cylinders 30 can be mounted has been described. However, one or three or more liquefied gas cylinders 30 may be mounted. The liquefied gas cylinder 30 may be mounted in an oblique direction. Furthermore, the gas engine according to the present invention may be mounted on a portable working machine such as a back-powered sprayer or a brush cutter.

The perspective view of the gas engine generator concerning one embodiment of the present invention is shown. The internal structure figure in the right side view of a gas engine generator is shown. The side view for demonstrating the action | operation of a front cylinder cover is shown. The side view for demonstrating the action | operation of a front cylinder cover is shown. The front view of a gas engine generator is shown. The internal structure figure in planar view of a gas engine generator is shown. The internal structure figure in the left view of a gas engine generator is shown. The perspective view of the gas engine generator of the state which opened the front cylinder cover is shown.

Explanation of symbols

1 Gas engine generator 3 Gas engine 10 Case 13 Front cylinder cover (cylinder cover part)
30 Liquefied gas cylinder 40 Engine 50 Generator 53 Pressure regulation mixer (mixer)
60 mounting portion 62 fuel piping 66 cock 70 cylinder posture holding mechanism (cylinder posture holding means)

Claims (7)

In a gas engine in which a liquefied gas cylinder that stores liquefied gas and an engine that drives the liquefied gas supplied from the fuel outlet of the liquefied gas cylinder as fuel are housed in a case,
A gas engine characterized in that the liquefied gas cylinder is arranged vertically with a fuel outlet facing downward.   The case is disposed in the case so that a fuel outlet of the liquefied gas cylinder can be detachably attached, and an attachment portion communicating with the engine and at least the front side of the liquefied gas cylinder attached to the attachment portion can be exposed. The gas engine according to claim 1, further comprising a cylinder cover portion that covers the gas cylinder.   The cylinder cover portion is arranged on the front side of the mounting portion and the liquefied gas cylinder mounted on the mounting portion, extends in the vertical direction, and the upper side tilts in the front-rear direction via a rotating portion provided in the lower portion. The gas engine according to claim 2, which is possible.   When the cylinder cover part moves to a position that covers the attachment part and the liquefied gas cylinder attached to the attachment part, the bottom part of the liquefied gas cylinder is urged toward the tip side to hold the posture of the liquefied gas cylinder in an inverted state. The gas engine according to claim 3, further comprising a cylinder posture holding means for performing the operation.   The mounting portion includes a cock capable of connecting a supply pipe for supplying gas fuel supplied from a gas fuel supply source installed outside the case, which is separate from the liquefied gas cylinder housed in the case. The gas engine according to any one of claims 1 to 4, wherein   The liquefied gas fuel supplied from the liquefied gas cylinder and the gas fuel supply source are supplied to a fuel pipe communicating between the mounting portion provided with the cock and the intake passage of the mixer housed in the case. 6. The gas engine according to claim 5, further comprising a flow rate adjusting valve for selectively flowing a fuel having a flow rate corresponding to each of the gas fuels. A gas engine according to any one of claims 1 to 6;
And a generator driven by the engine of the gas engine.

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