JPH0726523B2 - Fluid transfer system - Google Patents

Description

The present invention relates to a fluid transfer device adapted to be driven by a fluid pump, and more particularly to a fluid transfer device for a marine propulsion device.

Conventionally, this type of fluid transfer device has been driven by a fluid pumped from a fluid pump (see, for example, Japanese Patent Publication No. 58-93908). For this reason, the fluid transfer device must be located downstream of the fluid pump,
If it is necessary to configure the system in the order of the fluid source, the fluid pump and the fluid transfer device, and if you want to place the fluid source and the fluid transfer device in close proximity and install the fluid pump at a distant position,
There was a problem that the piping structure became complicated and the degree of freedom in design was limited.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a fluid transfer system in which the degree of freedom in design is improved.

For the present invention, see the pumps disclosed in US Pat. No. 3,765,802 and US Pat. No. 2,951,745.

The present invention provides a fluid transfer system comprising a fluid pump having an intake port, a pump housing defining a cavity and a fluid transfer device including a movable wall provided in the cavity. The movable wall cooperates with the cavity to define a variable volume transfer chamber. The fluid transfer device also includes a fluid inlet that is capable of communicating with the fluid transfer chamber and is adapted to communicate with the fluid source, a flow outlet that is capable of communicating with the fluid transfer chamber and also communicates with the nine inlet port, and the fluid transfer device. A device for reciprocating the movable wall in response to alternating communication with the fluid outlet and the fluid inlet of the chamber, whereby the movable wall is unidirectional when the fluid transfer chamber is in communication with the fluid inlet. When the fluid transfer chamber is filled with fluid and the fluid transfer chamber communicates with the fluid outlet, the movable wall moves in the other direction to remove the fluid in the transfer chamber.

In one embodiment, the reciprocating device includes a pressing device that moves the movable wall in one direction and a selection control device that selectively controls communication with the fluid outlet and the fluid inlet of the fluid transfer device.

In another embodiment, the fluid transfer system also includes a supply maintenance device for maintaining the supply of fluid to the suction port when the fluid outlet is not in communication with the fluid transfer chamber.

The present invention also provides a fluid transfer device that includes a pump housing defining a cavity having a movable wall. The movable wall cooperates with the cavity to define a variable volume fluid metering chamber. The fluid transfer device also includes a pushing device for moving the movable wall in one direction, and a fluid outlet that is in communication with the fluid metering chamber and adapted to communicate with the suction port of the fluid pump,
Thereby, when the fluid chamber communicates with the fluid outlet, the suction force present in the suction port communicates with the fluid metering chamber and also moves the movable wall in the opposite direction against the action of the pressing device. The fluid transfer device also includes a fluid inlet communicable with the fluid metering chamber and adapted to communicate with the fluid source, and a controller for selectively controlling communication with the fluid inlet and the fluid outlet of the fluid chamber. To do.

The fluid transfer device is also provided in the pump housing and extends perpendicularly from the movable wall to partially define a variable volume fluid transfer chamber; a first end portion contained within the hole; A piston having a second end. The first end is attached to the moveable wall, and the second end cooperates with the aperture to define a variable volume fluid transfer chamber. The fluid transfer chamber is also in communication with the fluid transfer chamber and is in communication with the second fluid source, and a second fluid inlet is provided to allow fluid to flow into the fluid transfer chamber. And a check valve device for preventing the outflow of fluid from the fluid transfer chamber. The fluid transfer device is also in communication with the fluid transfer chamber and is in communication with the suction port, and a second fluid outlet and a fluid outflow from the fluid transfer chamber which is provided at the second fluid outlet but allows fluid to flow. A check valve device to prevent fluid into the chamber.

In one embodiment, the fluid transfer device is incorporated into a marine propulsion device, the fluid source is a fuel source, and the second fluid source is an oil source.

A major feature of the present invention is the provision of a fluid transfer device for a fluid such as oil, which device can be provided close to the oil source and thus the oil between the device and the oil source. The length of the pipe is small and almost no longer required to prime the oil line.

Another feature of the present invention is to provide a device that is capable of delivering oil and distributing fuel and oil to a two-stroke internal combustion engine when used in a ship drive or the like.

Other features and advantages of the embodiments of the invention will be more apparent from the following description, drawings and claims.

EXAMPLES Before describing in detail at least one embodiment of the present invention,
It should be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or drawings. The present invention may be embodied in other embodiments and may be implemented or carried out in various ways. It should also be understood that the phraseology and terminology used below is for the purpose of description and should not be construed in a limiting sense.

As shown in the drawings, the present invention provides a fluid pumping device that includes a fluid transfer device 10 for transferring fluids such as fuel and oil and a fluid or fuel pump 52. More specifically, as shown in FIG.
And the fuel pump 52 is the ship propulsion device 14 provided on the ship.
Included in. However, the device and fluid pump can be used in other applications where fluid pumping is required.

The boat propulsion device 14 includes a lower unit 22 that rotatably supports a propeller 26, and a drive train 30 for rotating the propeller 26. The ship propulsion unit 14 also has a lower unit 22
Mounted to the drive train 30 includes a two-stroke engine 42 for driving the drive train 30. The two-stroke internal combustion engine 42 includes an engine block 46, a crankcase 50, and a fuel pump 52.
And a cab 54 attached to the crankcase 50 by appropriate means. Device 10 supplies fuel and oil to fuel pump 52 via conduit 64. This device 10 is installed adjacent to a fuel source and an oil source provided in a ship 18. As described in more detail below, device 10 is connected to fuel conduit 66 and oil conduit 70, respectively.

As shown in FIG. 2, the fuel transfer device 10 includes a metering unit 71 for metering a fluid such as fuel and a transfer unit 72 for transferring a fluid such as oil. The fuel metering unit 71 communicates with the fuel source and the suction port 73 that follows the fuel pump 52. The fuel metering unit 71 is driven by the suction force existing in the suction port 73, and drives the oil transfer unit 72 while metering the fuel as described in more detail below.

The fuel metering portion 71 includes a pump housing 74 that defines a cavity 78. The device 10 also includes a movable wall 82 provided in the cavity 78 which cooperates with the cavity 78 to provide a variable volume fuel metering chamber or fuel transfer chamber 86 and an air chamber.
Define 90 and. A ventilation passage 92 connects the air chamber 90 with the atmosphere.

The movable wall 82 forms a flexible membrane 94 whose peripheral portion is connected to the pump housing 74, and a piston portion 98 attached to both sides of the flexible membrane 94 and located at the central portion of the movable wall 82. 1
It includes a pair of plates.

The fuel metering portion 71 is in communication with a suction port 73 that follows the fuel pump 52, whereby the suction force present in the suction port 73 moves the movable wall 82 and also moves the metered or pump fuel from the fuel source. You can More specifically, the fuel metering portion 71 is provided in the housing and is provided with a conduit 64.
Is provided with a fuel outlet 122 which communicates with the suction port 73, whereby the suction force present in the suction port 73 is
As will be described in more detail below, the fuel outlet 122
When communicating with 6, the movable wall 82 is moved in one direction. Weighing unit 7
1 is also provided in the housing 74 and includes a conduit 66.
A fuel inlet 126 communicating with the fuel source, a control device 130 selectively controlling communication between the fuel outlet 122 of the fuel chamber 86 and the fuel inlet 126, and movable when the fuel chamber 86 communicates with the fuel inlet 126. And a device for moving the wall 82 in the opposite direction.

When the suction port 73 communicates with the fuel chamber 86, the suction force moves to the movable wall.
A pressure difference is created on both sides of 82, and this movable wall 82 also reduces the volume of the fuel chamber 86, which allows the fuel to flow into the fuel metering chamber.
Eject from 86.

After the fuel chamber 86 discharges the fuel and the movable wall 82 is sufficiently displaced in one direction, the fuel at the fuel inlet 126 is filled with the fuel at the atmospheric pressure.
It acts as a device that allows the elimination of the drive differential pressure before and after the entrance movable wall 82. This allows the opposite movement of the movable wall 82.

A device is provided that prevents the fuel from being drawn from the fuel chamber 86 and allows the fuel to flow into the fuel chamber 86 from the fuel source. Such a device is a one-way valve 142 contained within the fuel inlet 126.

The device provided to move the movable wall 82 in the opposite direction when the fuel chamber 86 is in communication with the fuel inlet 126 is in the form of a spring 154, which is a pump forming part of the fuel chamber 86. It is provided in the fuel chamber 90 between the portion of the housing 74 and the piston portion 98 of the movable wall 82. Spring 154 operates to move movable wall 82 in the opposite direction, thereby increasing the volume of fuel chamber 86 and drawing fuel from the fuel source through conduit 66 into fuel metering chamber 86.

As shown in FIG. 2, the selective control device 130, in the illustrated embodiment, is integral with the pump housing 74 and defines a valve chamber 174, a fuel outlet 122 and a valve chamber 174. And a first fuel passage 182 extending between the valve chamber 174 and the fuel inlet 126. The selective control device also includes a second suction passage 190 extending from the valve chamber 174 to the fuel chamber 86 and a second suction passage 190 extending from the fuel chamber 86 to the valve chamber 174.
And a shuttle valve 198 housed in a valve chamber 174.

The valve chamber 174 has a first end 202 and a second end 204, and the first and second intake passages 178 and 190 communicate with the first end 202 of the valve chamber 174. And the first and second fuel passages 182 and 194 communicate with the second end 204 of the valve chamber 174.

The shuttle valve 198 has a first position where the fuel outlet 122 communicates with the fuel chamber 86 and a second position where the fuel inlet 126 communicates with the fuel chamber 86.
It is movable to and from the position. In the first position, the valve chamber first end 202 is open and the valve chamber second end 204 is closed by the shuttle valve 198. As a result, in the first position, the first suction passage 178 is in the second position.
Of the first fuel passage 182 is connected to the second suction passage 190
Does not communicate with the fuel passage 194.

In the second position, the second end 204 of the valve chamber 174 is open and the first end 202 of the valve chamber 174 is closed by the shuttle valve 198. As a result, in this second position, the first fuel passage 182 is the second fuel passage 1
The first suction passage 178 is in communication with the second suction passage 194.
Does not communicate with.

The selection control device 130 also includes a device for connecting the shuttle valve 198 to the movable wall 82 and for permitting lost motion between the shuttle valve 198 and the movable wall 82. The lost motion device ensures that the shuttle valve 198 does not move from the first position to the second position until the movable wall 82 is displaced sufficiently in one direction. Similarly, the empty motion device is
Shuttle valve 19 only when is fully displaced in the opposite direction
Ensure that 8 returns from the second position to the first position in the opposite direction.

The coupling and lost motion device includes a rod 210 having one end attached to the piston portion 98 of the movable wall 82 by any suitable means. This rod 210 extends through a hole 212 in the housing 74 to a shuttle valve 198, and also rod 2
A seal 213 is provided to prevent fluid around 1 from passing through the holes 212.

The other end of rod 210 is a recess in shuttle valve 198.
Mounted slidably in 218. More particularly, rod 210 extends through opening 222 into recess 218 in shuttle valve 198, and rod 21
The zero end 214 is contained in the recess 218 and has a larger dimension than the opening 222 through the rod 21. The end 214 of the rod 210 is also spaced from the ends of the recess 218, thereby providing a lost motion between the shuttle valve 198 and the rod 210.

To prevent the shuttle valve 198 from being centered between the first and second positions, the selection control device 130 includes a restraint device 226, which restrains the shuttle valve 198 in the first and second positions. Press alternately towards the second position.

As shown in FIG. 2, one embodiment of the restraint device 226 includes a ridge 238 incorporated into the side between the ends of the shuttle valve 198 and a side of the valve housing 170 adjacent the ridge. And a rounded lid member 242 housed in a hole 246 in the same.

The ridge 238 of the shuttle valve 198 includes ramps 250 and 252, which ramps form peaks on the sides of the shuttle valve 198. Spring 254 in hole 246
A device in the form of a device is provided which presses the rounded member 242 toward the ridge of the shuttle valve 198, which causes the rounded member 242 to slope 250 of the ridge 238.
And acts on 252. Accordingly, the member 242 presses the shuttle valve 198 in one direction or in the opposite direction depending on which side of the ridge 238 the member 242 is located on. In this way, the shuttle valve 198 is pressed to move the movable wall 82.
First until it is moved by rod 210 attached to
Or stay in the second position.

As shown in FIG. 3, another embodiment of the restraint device 226 is a spring 230 provided within the shuttle valve 198 and
Includes 234. The end 214 is again spaced from the end of the recess 218 and the one spring 230 causes the end 214 of the rod 210 to
And one end of the shuttle valve 198,
The spring 234 on one side and the spring on the other side are concentric with the rod 210.
It is located between the end 214 of 210 and the other end of the shuttle valve 198.

When shuttle valve 198 is in the first or second position, one of springs 230 and 234 is compressed and the other spring is relaxed. As the end 214 of the rod 210 begins to move from one end of the recess 218 to the other end, the compressed spring begins to loosen and the other spring eventually compresses, pushing the shuttle valve 198 to the other position. Load the compressed spring before it completely loosens.
Since some movement of the end 214 of 210 is required, the rod
Despite the initial movement of end 214 of 210, shuttle valve 198 maintains its position by the spring being pressed and still compressed.

The spring 154 also helps push the shuttle valve 198 toward the first position.

As shown in FIG. 2, the oil transfer part 72 is provided with a housing 74.
And a device for transferring oil in response to movement of the movable wall 82. The oil transfer device includes a variable volume oil transfer formed by a closed bore 266 extending perpendicularly from the fuel chamber 86 and from the movable wall 82 and an end 270 of a piston 274 housed within the bore 266. It contains chamber 262. The other end of piston 274 is attached to piston portion 98 of movable wall 82 by any suitable means. Therefore, the volume of the oil transfer chamber 262 changes with the movement of the movable wall 82.

In this embodiment, the oil transfer device 262 is made about one fiftieth the size of the fuel chamber 86 to provide the desired oil / fuel ratio. A seal 278 is provided around the plunger 274 to prevent the oil chamber 262 from communicating with the fuel chamber 86.

The oil transfer device also includes an inlet 280 having a one-way valve 282 for introducing oil into the oil chamber 262 and preventing oil from flowing out of the oil chamber 262;
Outlet 284 with a one-way valve 286 to allow oil to flow out of the chamber but to prevent oil from entering the oil chamber 262.
And include.

The oil chamber inlet 280 is connected to the oil source by conduit 70,
The outlet 284 from the oil transfer chamber 262 communicates with a fuel line 64 to the fuel pump 52 via a line 288. The one-way valve 286 is spring biased to prevent the suction force present at the suction port 73 from removing oil from the oil transfer chamber 262. In this embodiment, line 288 is connected to the portion of housing 74 that forms fluid outlet 122, but in other embodiments line 288 can be connected to conduit 64 or suction port 73.

The device 10 further includes a supply maintenance manual priming device 290 in communication with the conduit 64 for priming the fuel pump 52 and for maintaining fuel and oil supply to the fuel pump 52. The device 10 draws fuel and oil from their respective sources. More specifically, the device 290 comprises a housing 292 forming a cavity 294 having a movable wall 296. Although a separate housing 292 is formed in this embodiment, in other embodiments the housing 292 can be formed integrally with the housing 74. Movable wall 296
Collaborates with void 294 to provide variable volume supply chamber 298 and air chamber 300.
Define and. The air chamber 300 communicates with the atmosphere via a ventilation path 302. The movable wall 296 includes a flexible membrane 304 that is circumferentially connected to the housing 292 and a piston portion 306 that is provided in the central portion of the movable wall 296.

The member 308 is connected to the piston portion 306 and is connected to the air chamber 300.
Through and through opening 310 to the outside of housing 292. The member 308 is adapted to be moved by an operator to move the movable wall 296 in one direction and expel fluid from the supply chamber 298 when the device 290 is used for manual priming.

A device is also provided for moving the movable wall 296 in the opposite direction after the movable wall 296 has been moved in one direction. Such a device is in the form of a spring 312 housed within the supply chamber 298 and between the piston portion 306 and the portion of the housing 292 defining the supply chamber 298. The supply chamber 298 communicates with a fluid port 316, which communicates with the conduit 64 to the fuel pump 52 by a priming line 314. In other embodiments, line 314 may be suction port 73 or fluid outlet 122.
Can be connected to.

A device in the form of a one-way check valve 317 is provided at the fuel outlet 122 that allows fluid flow from the fuel outlet 122 and to the fuel outlet 122 when priming of the fuel pump 52 is required. Block fluid flow.

More specifically, when the volume of the supply chamber 298 increases due to the action of the spring 312, the fuel and oil flow from the fuel chamber 86 to the check valve 31.
It is drawn into the supply chamber 298 via 7. When manual priming is required, the volume of supply chamber 298 is
Decrease by moving 08. Fuel and oil flowing out of the supply chamber 298 flow to the fuel pump 52, and the check valve 31
Do not pass 7.

When the fluid transfer device 10 and the fuel pump 52 are operated to supply the fuel and oil flow to the fuel pump 52, the supply maintaining device 290 maintains the supply to the fuel pump 52 when the fuel and oil are not flowing from the device 10. To do. More specifically, when the shuttle valve 198 is in the second position and the fluid outlet is not in communication with the fuel chamber 86, the suction force existing in the suction port 73 moves the movable wall 304 in one direction to move the supply chamber. Empty and supply fuel and oil to intake port 73.
Further, when the shuttle valve 198 is in the first position and the fluid outlet 122 is not in communication with the fuel chamber 86, the spring 312 presses the movable wall 304 in the opposite direction to supply fuel and oil to the intake port 73. Meanwhile, the supply chamber 298 is filled with fluid.

Next, the overall operation of the above embodiment will be described. Fuel pump
When the suction force is generated in the suction port 73 due to the operation of 52, the first suction passage 178 and the first end portion 20 of the valve chamber 174 are generated.
2, the fuel existing in the second suction passage 190 and the fuel transfer chamber 86 is sucked into the suction port 73. At this time, the movable wall 82
The spring 154 in the direction of decreasing the volume of the fuel transfer chamber 86.
And the end portion 214 of the rod 210 moves to the right side in the drawing in the recess 218. At the same time, piston 274
End 270 moves in a direction in which the oil transfer chamber 262 becomes smaller. Due to the movement of the piston 274, the oil transfer chamber 262
The oil therein is pumped to the suction port 73 via the line 288.

The end 214 of the rod 210 pulls the shuttle valve 198 and the shuttle valve 198 moves from the first position to the second position when the volume of the fuel transfer chamber 86 is substantially minimized. This causes the first end 202 of the valve chamber 174 to be closed by the shuttle valve 198 and the second end 204 of the valve chamber 174.
Opens. As a result, the second suction passage 190 and the first suction passage 178 are not in communication with each other, and the first fuel passage 1
The 82 and the second fuel passage 194 communicate with each other.

In this way, when the first end 202 of the valve chamber 174 is closed by the shuttle valve 198, the suction force existing at the suction port 73 is blocked by the shuttle valve 198 and does not reach the fuel transfer chamber 86. . As a result, the movable wall 82 is pressed by the spring 154 in the direction in which the volume of the fuel transfer chamber 86 is maximized, and the fuel is transferred via the first fuel passage 182 and the second fuel passage 194. Be drawn into. At the same time, the piston 274 moves in the direction in which the volume of the oil transfer chamber 262 is maximized, and the oil chamber inlet 2
Oil is drawn into the oil transfer chamber via 80. During this operation, the one-way valve 286 prevents the suction force present at the suction port 73 from being supplied to the oil transfer chamber 262.

When the volume of the fuel transfer chamber 86 reaches the maximum, the rod 21
The zero end 214 pushes the shuttle valve 198, causing the shuttle valve 198 to move from the second position to the first position. This opens the first end 202 of the valve chamber 174,
Second end 204 of 4 is closed by shuttle valve 198. As a result, the second suction passage 190 and the first suction passage 1
78 communicates with the first fuel passage 182 and the second fuel passage 194.
And are not connected.

As described above, according to the invention described in claim 1, when the transfer chamber communicates with the suction port by the valve means, the fluid in the transfer chamber is sucked into the suction port to supply the fluid to the fluid pump. And at the same time, a second fluid can be supplied to the fluid pump by the second fluid transfer means in response to movement of the movable wall. Further, when the transfer chamber communicates with the fluid inlet by the valve means, the movable wall is pressed by the pressing means to increase the volume of the transfer chamber, the fluid at the fluid inlet is sucked into the transfer chamber, and the fluid is transferred to the transfer chamber. And at the same time, the second fluid can be supplied to the second fluid transfer means in response to the movement of the movable wall. Therefore, since the fluid transfer device can be driven by the suction force of the fluid pump and can be arranged on the upstream side of the fluid pump, the system can be arranged in the order of the fluid source, the fluid transfer device, and the fluid pump. Therefore, when a fluid source for supplying a fluid to the fluid transfer device and the fluid transfer device are arranged close to each other and a fluid pump is desired to be installed at a distant position, the piping structure becomes simple as compared with the conventional technique. The degree of freedom in design can be further improved.

According to the invention described in claim 9,
Since the fuel transfer chamber and the oil transfer chamber are provided so that the fuel in the fuel transfer chamber and the oil in the oil transfer chamber can be supplied to the suction port by the operation of the valve means, the fluid transfer device is arranged upstream of the fluid pump. In addition, the fluid transfer system allows the fluid and the oil to be pumped.

[Brief description of drawings]

1 is a side view of a ship propulsion device including a fluid transfer device and attached to a hull, FIG. 2 is a sectional view of the fluid transfer device, FIG.
FIG. 7 is a sectional view showing another embodiment of a part of the fluid transfer device shown in FIG. 10 ... Fluid transfer device, 14 ... Ship propulsion device, 22 ... Lower unit, 26 ... Propeller, 30 ... Drive train, 34 ... Upper unit, 42 ... Two-stroke engine, 52 ... Fuel pump, 73 ... Suction port, 74 ... Pump housing 82 ... Movable wall, 122 ... Fuel outlet, 126 ... Fuel inlet, 130 ... Selection control device, 154 ... Pressing device, 262 ... Variable volume oil transfer chamber , 266
...... Hole, 274 ... Piston, 280 ... Inlet, 282 ... One-way valve, 284 ... Outlet, 286 ... One-way valve

Claims (9)

[Claims] 1. A fluid pump (5) having an intake port (73).
A fluid transfer system comprising: 2) and a fluid transfer device (10), wherein the fluid transfer device (10) can communicate with the suction port (73).
A pump housing (74) forming a void (78); and a movable chamber provided in the void, the transfer chamber (86) having a variable volume, is formed in cooperation with the void. A movable wall (82); a pressing means (154) for moving the movable wall in one direction; a fluid inlet (126) capable of communicating with a fluid source; the transfer chamber, the suction through the fluid outlet. Communicates with the port, thereby causing the suction port to discharge fluid from the transfer chamber, thereby moving the movable wall in a direction opposite to the one direction, and communicating the transfer chamber with the fluid inlet. Accordingly, the fluid at the fluid inlet is supplied to the transfer chamber in response to the movement of the movable wall in the one direction, and discharge of these fluids from the transfer chamber and supply to the transfer chamber are selected. Valve means (130) for performing; transfer of the movable wall A means for operating the valve means in response to the movement of the valve means; and a means for transferring a second fluid in response to the movement of the movable wall (262,270). Fluid transfer system. 2. The fluid transfer system according to claim 1, wherein the second fluid transfer means is in the pump housing and extends vertically from the movable wall. A hole (266) partially forming a variable volume fluid transfer chamber (262); a piston housed in the hole and having a first end and a second end, A piston (274) having one end attached to the movable wall and the second end adapted to cooperate with the bore to form the second variable volume fluid transfer chamber. A second fluid inlet (280) communicable with the second fluid transfer chamber and communicatively with a second fluid source; and a second fluid inlet (280) provided in the second fluid inlet. To allow the fluid to flow to the second fluid transfer chamber and prevent the fluid from flowing from the second fluid transfer chamber. A non-return valve means (282); a second fluid outlet (284) communicating with the second fluid transfer chamber and capable of communicating with the suction port; and a second fluid outlet provided in the second fluid outlet, A non-return valve means (286) for allowing the flow of the fluid from the second fluid transfer chamber and preventing the flow of the fluid to the second fluid transfer chamber; system. 3. The fluid transfer system according to claim 1, wherein the valve means forms a valve chamber (174).
A first suction passage (178) extending between the fluid outlet and the valve chamber; a first fluid passage (182) extending from the valve chamber to the fluid inlet; A second suction passage (190) extending to the transfer chamber (86); a second fluid passage (194) extending from the transfer chamber (86) to the valve chamber; a shuttle valve provided in the valve chamber (198); and the shuttle valve includes the first suction passage and the second suction passage.
Of the first fluid passage communicates with the suction passage of
A first position not communicating with the second fluid passage, and a second position where the first fluid passage communicates with the second fluid passage and the first suction passage does not communicate with the second suction passage. A fluid transfer system characterized in that it can be moved to and from. 4. The fluid transfer system according to claim 3, wherein the valve chamber has a first end (202) and a second end (20).
4), the first suction passage and the second suction passage communicate with the first end of the valve chamber, and the first fluid passage and the second suction passage are connected to each other. A fluid transfer system, wherein a fluid passage communicates with the second end of the valve chamber. 5. The fluid transfer system according to claim 3, wherein the valve means alternately presses the shuttle valve toward the first position and the second position. A fluid transfer system comprising (226). 6. The fluid transfer system according to claim 1, wherein the pressing means for moving the movable wall in one direction is provided in the transfer chamber and the movable wall. A fluid transfer system comprising a spring extending between the pump housing and the pump housing. 7. A fluid transfer system according to claim 1, wherein means for maintaining a fluid flow with respect to the suction port when the fluid outlet is not in communication with the transfer chamber. A fluid transfer system comprising (290). 8. A fluid transfer system according to claim 7, wherein said means for maintaining fluid flow comprises a housing (292) forming a feed recess (294); A movable supply wall (29) which is provided at a place and forms a supply chamber (298) which can cooperate with the supply recess to change the volume.
6); and a fluid port (316) communicating with the supply chamber, the fluid outlet, and the suction port, whereby the suction force existing in the suction port moves the supply movable wall in one direction. The supply chamber is adapted to supply fluid to the suction port when the fluid outlet is not in communication with the transfer chamber (86), and is adapted to maintain the fluid flow. The means further comprises means (312) for pressing the supply movable wall (296) in the opposite direction, wherein the fluid outlet is the transfer chamber (8).
A fluid transfer system characterized in that the supply chamber is filled with a fluid by the pressing means (312) when communicating with 6). 9. A fluid transfer system for transferring oil and sending fuel to a fuel pump for a two-stroke internal combustion engine having an intake port (73), the first inlet (280) being capable of communicating with an oil source. A second inlet (126) capable of communicating with a fuel source; an outlet (122) capable of communicating with the suction port (73); Means for sending fuel and oil, the means for sending fuel and transferring oil comprises a fuel transfer chamber (a part of which is formed by the first movable wall (82)). 86) and an oil transfer chamber (262) formed by a second movable wall (274) movably connected to the first movable wall (82) of the fuel transfer chamber together with the first movable wall. ) Of the fuel transfer chamber (86) and the oil transfer chamber (262) Means (154) for pressing the first movable wall (82) and the second movable wall (274) in the direction of maximizing the product, and the fuel transfer chamber (86) alternately with the intake port. A valve means (130) for communicating the first and second valve means (130) in a direction opposite to the direction in which the volumes of the fuel transfer chamber (86) and the oil transfer chamber (262) are maximized by the valve means. Movable wall (82) and second movable wall (274)
When the movable wall moves in a direction that maximizes the volume of the fuel transfer chamber by the operation of the pressing unit, the valve unit causes the fuel transfer chamber (86) to move to the first position. 2 entrances (12
A fluid transfer system characterized by communicating with 6).