JP2010059826A - Full tank control valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a full tank control valve capable of keeping dimension in a height direction of a fuel tank small while maintaining capacity of the fuel tank. <P>SOLUTION: A jet pump 44 is provided as a discharge means for discharging fuel flowing into a housing 31 of a full tank control valve 30. Fuel in the housing 31 is sucked into the fuel tank 10 by a jet pump 44 and the full tank control valve 30 is changed over to a communication state during operation of the engine after the fuel tank 10 is filled. Position of a valve seat 32 of the full tank control valve 30 is arranged at a position lower than a full tank liquid surface position F of the fuel tank 10. Consequently, the dimension in the height direction of the fuel tank 10 including the full tank control valve 30 can be made small. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a full tank control valve that switches communication / interruption between an internal space of a fuel tank and a canister.

The conventional full tank control valve has a so-called float valve having a valve body that moves integrally with a float floating in the fuel, and acts on the float when the fuel level in the fuel tank approaches the full tank position by refueling. The float is moved by the buoyancy of the fuel to block communication between the internal space of the fuel tank and the canister. For this reason, as a conventional full tank control valve, a float valve is disposed outside and above the fuel tank (see, for example, Patent Document 1), or a float valve is attached to the ceiling plate of the fuel tank. (For example, refer to Patent Document 2).
JP 2006-188090 A Special table 2003-504269 gazette

  In general, a fuel tank of an automobile is installed under the floor of the automobile. In recent years, there has been an increasing demand for expanding the living space without increasing the overall height of the automobile, that is, increasing the indoor height. For this reason, the passenger compartment floor of a car becomes low. Normally, a fuel tank is arranged under the floor of an automobile, but the fuel tank shape tends to be flattened in order to realize the cabin floor reduction described above. In the conventional full tank control valve, the float valve is installed above the fuel tank, in other words, above the full liquid level position. For this reason, it becomes difficult to reduce the height dimension of the fuel tank while maintaining the capacity of the fuel tank.

  The present invention has been made against the background described above, and its object is to provide a full tank control valve capable of reducing the height dimension of the fuel tank while maintaining the capacity of the fuel tank. It is.

  The full tank control valve according to claim 1 of the present invention communicates or shuts off the internal space and the canister by a valve member disposed in the middle of a ventilation passage that connects the internal space of the fuel tank and the canister so that they can communicate with each other. A full control valve for switching to a state, a housing for accommodating the valve member, a valve seat that constitutes one of the valve members and is fixed to the housing, and constitutes the other of the valve members and can be seated on the valve seat; A valve body accommodated in the housing movably in the housing, a float provided with the valve body and formed to float on the fuel and accommodated in the housing, and a discharge means for discharging the fuel staying in the housing; The fuel tank side end portion of the ventilation passage flows into the housing through the ventilation passage when the liquid level of the fuel reaches the full tank position in the fuel tank. When the fuel flows into the housing from the fuel tank through the ventilation passage and the float is immersed in the fuel, the float receives the buoyancy from the fuel and moves the valve body to the valve seat. As a result, the internal space and the canister are shut off, the fuel level in the fuel tank is lower than the full tank position, and the fuel in the housing is discharged out of the housing by the operation of the discharge means. The valve body is moved away from the valve seat, and the internal space and the canister are in communication with each other.

  In the conventional full tank control valve, the float valve is installed above the full tank level of the fuel tank, so when fuel is injected into the fuel tank by refueling, the fuel level rises. When the float rises and eventually the fuel level reaches the full tank position, the full tank control valve closes and the communication between the internal space of the fuel tank and the canister is cut off, whereby the fuel supply is stopped. After that, when the fuel is consumed by the engine and the fuel level in the fuel tank decreases, the fuel in the float chamber in which the float is movably accommodated flows out of the float chamber due to its own weight as the fuel level decreases, As a result, the full tank control valve is opened. That is, in the conventional full tank control valve, the discharge of the fuel in the float chamber depends on the natural outflow due to gravity. Therefore, in the conventional full tank control valve, it is impossible in principle to dispose the float valve at a position lower than the full tank liquid level. For this reason, the fuel tank system device including the full tank control valve has a high height. It was difficult to reduce the thickness.

  On the other hand, in the full tank control device according to the first aspect of the present invention, the fuel in the housing that accommodates the float is discharged out of the housing by the discharge means, and the float moves downward along with this, and the fuel is fully charged. The tank control valve opens. In other words, in the full tank control device according to the first aspect of the present invention, the fuel in the housing housing the float is forcibly discharged out of the housing by the discharging means. For this reason, it is not always necessary to provide the float valve of the full tank control valve above the full tank level of the fuel tank. That is, it is possible to improve the degree of design freedom regarding the installation location of the full tank control valve. Therefore, it is possible to easily set the fuel tank shape that satisfies the vehicle side requirements. As described above, it is possible to provide a full tank control valve capable of reducing the height dimension of the fuel tank while maintaining the capacity of the fuel tank.

  The full tank control valve according to claim 2 of the present invention is characterized in that the valve seat is disposed at a position lower than the full tank position in the fuel tank.

  According to the above configuration, the float that sits on the valve seat and closes the full tank control valve is naturally at a position lower than the full tank position on the liquid level. Therefore, it is possible to reliably reduce the height dimension of the fuel tank while maintaining the capacity of the fuel tank.

  In general, the fuel tank is designed so that a predetermined air layer remains in the upper part inside the tank even when the tank is full. In the conventional full tank control valve, a part thereof further protrudes above the ceiling plate of the fuel tank designed in this way. On the other hand, according to the full tank control valve of the second aspect of the present invention, the ceiling plate of the fuel tank can be set to the highest position of the fuel tank.

  The full tank control valve according to claim 3 of the present invention is characterized in that the housing is disposed outside the fuel tank.

  According to the above-described configuration, the fuel tank installation space in the vehicle can be effectively utilized while enabling the height dimension of the fuel tank to be reduced while maintaining the capacity of the fuel tank.

  The full tank control valve according to claim 4 of the present invention is characterized in that the housing is disposed inside the fuel tank.

  According to the above configuration, since the full tank control valve is built in the fuel tank, it is possible to reduce the height dimension of the fuel tank while maintaining the capacity of the fuel tank, and to the fuel tank for the vehicle. In addition, the number of man-hours for installing the full tank control valve can be reduced.

  The full tank control valve according to claim 5 of the present invention includes a pump module disposed in the fuel tank for delivering the fuel in the fuel tank to the outside, and the housing is integrated with the pump module. It is a feature.

  Generally, in addition to a fuel pump, a fuel filter, a pressure regulator, a fuel sender for detecting a liquid level, and the like are integrally incorporated in a pump module. Can also be attached together. If the full tank control valve is integrated with such a pump module, the height of the fuel tank is reduced while maintaining the capacity of the fuel tank while reducing the number of steps for assembling the full tank control valve to the fuel tank. Can provide a full tank control valve.

  According to a sixth aspect of the present invention, the full tank control valve includes a pump module disposed in the fuel tank for sending the fuel in the fuel tank to the outside, and the discharging means is a fuel discharged from the pump module. It is characterized by being a jet pump that sucks fuel by an ejector action using a part of the jet pump.

  In general, in a pump module, a fuel pump, a fuel filter, a pressure regulator, and the like are accommodated in a container-like sub tank, and an intake port of the fuel pump is disposed so as to suck in fuel in the sub tank. A jet pump that sucks fuel by an ejector action using a part of the fuel discharged from the fuel pump is provided, and fuel outside the sub tank is constantly transferred into the sub tank by this jet pump.

  In the full tank control valve according to claim 6 of the present invention, the jet pump generally provided in the fuel tank is used as the fuel discharging means in the housing accommodating the float. It is possible to provide a full tank control valve capable of reducing the height direction dimension of the fuel tank while maintaining the capacity of the fuel tank while suppressing an increase in cost without newly installing a pump or the like as a discharge means.

  In the full tank control valve according to claim 7 of the present invention, a check valve for preventing a flow in the direction from the suction port toward the housing is provided in the middle of the fuel passage communicating the housing and the suction port of the jet pump. It is a feature.

  With such a configuration, it is possible to prevent the fuel in the fuel tank from flowing into the housing from the jet pump via the fuel passage when the jet pump is not operating, that is, while the engine is stopped.

  Hereinafter, an embodiment in which a full tank control valve according to the present invention is applied to a full tank control valve 30 attached to a fuel tank 10 of an automobile will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram illustrating a piping system around a fuel tank 10 of an automobile to which a full tank control valve 30 according to a first embodiment of the present invention is applied. The full tank control valve 30 according to the first embodiment of the present invention is provided outside the fuel tank 10 as shown in FIG. When the fuel level in the fuel tank 10 is lower than the full tank position when the fuel tank 10 is refueled, the full tank control valve 30 is connected between the internal space of the fuel tank 10 and the canister 20 via the ventilation passage 50. When the fuel level in the fuel tank 10 reaches the full tank position, the fuel is introduced through the ventilation passage 50, so that the internal space of the fuel tank 10 is reached. And the communication with the canister 20 are cut off.

  As shown in FIG. 1, the fuel tank 10 includes an oil supply pipe 11 for supplying fuel. The end of the fuel supply pipe 11 opposite to the fuel tank 10 opens to the outside of the vehicle body and is usually sealed with a lid (not shown) attached. In FIG. 1, a cover (not shown) of the fuel supply pipe 11 is opened, and a fuel gun 80 is inserted to supply fuel to the fuel tank 10. A pump module 40 for sending fuel to the outside of the fuel tank 10 is installed at the bottom of the fuel tank 10. The fuel delivered from the pump module 40 is supplied to the engine (not shown) through the supply passage 70. As shown in FIG. 1, the internal space of the fuel tank 10, that is, the space surrounded by the ceiling plate 12 and the fuel level in the fuel tank 10 communicates with the atmosphere via the ventilation passage 50 and the canister 20. ing. When fuel is consumed by the engine and the internal space of the fuel tank 10 expands and the pressure decreases, air is sucked from the atmospheric port 21 of the canister 20 through the ventilation passage 50 to recover the pressure, and to the engine (not shown). The fuel is smoothly supplied. On the other hand, the fuel vapor that has flowed into the canister 20 from the fuel tank 10 through the ventilation passage 50 is adsorbed by a fuel vapor adsorbing means filled in the canister 20, such as activated carbon. Outflow into the atmosphere from 21 is prevented. Here, the canister 20 has a purge port 22 communicating with an intake pipe (not shown) of the engine through a pipe line (not shown). Further, a purge valve (not shown) is provided in the middle of the intake pipe to control the communication interruption between the canister 20 and the intake air. When the purge valve (not shown) is controlled to be open as necessary, the fuel vapor collected in the canister 20 flows into the intake pipe and is supplied to the engine. As a result, the fuel vapor adsorption means in the canister 20, such as activated carbon, becomes ready for fuel vapor adsorption. As shown in FIG. 1, a full tank control valve 30 is provided outside the fuel tank 10 and in the middle of the ventilation passage 50. The configuration of the full tank control valve 30 according to the first embodiment of the present invention will be described below.

  As shown in FIG. 1, the full tank control valve 30 is generally formed by housing a valve seat 32 and a valve body 33 as valve members in a housing 31.

  The housing 31 is formed in a cylindrical shape. The housing 31 is formed from a metal or a resin material. As shown in FIG. 1, the housing 31 is attached to the automobile so that the axis of the cylindrical housing 31 is oriented in the vertical direction and the upper end of the housing 31 is lower than the ceiling plate 12 of the fuel tank 10. It has been. That is, the full tank control valve 30 according to the first embodiment of the present invention does not protrude upward from the fuel tank 10 when attached to the automobile.

  Inside the housing 31, a valve seat 32 and a valve body 33 are accommodated as valve members. As shown in FIG. 1, the valve seat 32 constituting one of the valve members is a circular hole provided in a partition plate 35 disposed inside the housing 31 so as to bisect the inside of the housing 31 in the axial direction of the housing 31. It is formed as a peripheral edge.

  The valve body 33 constituting the other of the valve members is formed in a conical shape having an apex on the upper side of the housing 31 and is accommodated in the lower space of the partition plate 35 in the housing 31. The valve body 33 is formed from a resin material, an elastic material, or a metal material. The valve body 33 is provided on one end side of a substantially cylindrical float 34 formed so as to float on the fuel. The float 34 is formed of, for example, a resin material, and is set to float on the fuel in a state where the valve body 33 is provided and integrated. In the housing 31, the conical valve body 33 and the valve seat 32 are coaxial with each other in the housing 31, and are supported so as to be movable in the axial direction of the housing 31.

  As shown in FIG. 1, the fuel tank 10 and the full tank control valve 30 in the ventilation passage 50 are connected to the lower part of the housing 31, specifically, to the space in which the float 34 below the partition plate 35 is accommodated. A ventilation passage 50A, which is a portion to be opened, is open. As shown in FIG. 1, the end of the ventilation passage 50 </ b> A on the fuel tank 10 side is inserted into the fuel tank 10 and opens toward the liquid level when the fuel tank 10 is full and toward the bottom surface 13 of the fuel tank 10. Yes.

  On the upper end surface of the housing 31, facing the space above the partition plate 35, as shown in FIG. 1, there is a ventilation passage 50 </ b> B that is a portion connecting the full tank control valve 30 and the canister 20 in the ventilation passage 50. It is open.

  Since the diameter of the bottom surface of the cone forming the valve body 33 is set larger than the inner diameter of the valve seat 32, the valve body 33 moves upward together with the float 34, that is, moves toward the valve seat 32. The valve element 33 is always seated on the valve seat 32 and the communication between the upper side and the lower side of the partition plate 35 is blocked. Thereby, the communication between the ventilation passage 50A and the ventilation passage 50B is blocked, and the communication between the space inside the fuel tank 10 and the canister 20 is blocked. On the other hand, when the valve body 33 moves downward integrally with the float 34, that is, away from the valve seat 32, the upper side and the lower side of the partition plate 35 communicate with each other, and the ventilation passage 50A and the ventilation passage 50B communicate with each other. The space in the fuel tank 10 and the canister 20 communicate with each other.

  As shown in FIG. 1, a discharge passage 60 is opened below the housing 31, specifically, in a space in which the float 34 below the partition plate 35 is accommodated. As shown in FIG. 1, the end of the discharge passage 60 on the fuel tank 10 side is inserted into the fuel tank 10, and the suction port 44 b of the jet pump 44 provided in the pump module 40 installed on the bottom surface 13 of the fuel tank 10. It is connected to the. A check valve 45 is provided in the middle of the discharge passage 60 and in the fuel tank 10. In the full tank control valve 30 according to the first embodiment of the present invention, as the check valve 45, the fuel flow from the housing 31 to the jet pump 44 passes, and in the opposite direction, that is, from the jet pump 44 to the full tank control valve. The thing of the specification which blocks the flow which goes to 30 is used.

  In a state in which the full tank control valve 30 and the fuel tank 10 according to the first embodiment of the present invention are attached to the automobile, the valve seat 32 of the full tank control valve 30 is in the full tank liquid level position F in the fuel tank 10 in the vertical direction. It is arranged to be at a lower position.

  Here, the pump module 40 including the jet pump 44 will be briefly described. The pump module 44 delivers fuel stored in the fuel tank 10 to the outside of the fuel tank 10, specifically to an engine (not shown). As shown in FIG. 1, the pump module 44 roughly includes a fuel filter 43 that collects and filters foreign matters in fuel, a fuel pump 41 that pumps fuel, and a fuel pressure discharged from the fuel pump 41 to a predetermined pressure. The pressure regulator 42 is integrally accommodated in a sub tank 46 that is a bottomed container. The fuel pump 41 sucks the fuel in the sub tank 46 through the fuel filter 43. Usually, the pressure of the fuel discharged from the fuel pump 41 is higher than the above-mentioned predetermined pressure, so the pressure regulator 42 discharges a part of the fuel discharged from the fuel pump 41 into the fuel tank 10, thereby supplying the supply passage The fuel pressure inside is adjusted to a predetermined pressure. The jet pump 44 introduces fuel outside the sub tank 46 into the sub tank 46 by the ejector effect using all or part of the fuel discharged from the pressure regulator 42. For this reason, even when the fuel in the fuel tank 10 is reduced and the fuel level is lower than the upper edge of the sub tank 46, the sub tank 46 is filled with fuel. Therefore, even if the fuel level in the fuel tank 10 fluctuates while the automobile is running, the fuel filter 43 is always immersed in the fuel, so the fuel pump 41 reliably delivers the fuel to the engine without sucking air. can do. In the pump module 40 of the fuel tank 10 to which the full tank control valve 30 according to the first embodiment of the present invention is attached, two jet pumps 44 are provided, one for introducing fuel into the sub tank 46, and the other one. It is used as a discharge means for the full tank control valve 30. In FIG. 1, a jet pump for introducing fuel into the sub tank 46 is omitted. As shown in FIG. 1, the jet pump 44 includes a drive port 44 a into which fuel discharged from the pressure regulator 42 is introduced, a suction port 44 b that is a fuel suction port as the jet pump 44, and a fuel discharge port as the jet pump 44. A discharge port 44c.

  Next, the operation of the full tank control valve 30 configured as described above will be described.

  (1) When the fuel level S in the fuel tank 10 is lower than the full tank level F, and the engine is in operation.

  FIG. 2 shows a state where the liquid level S in the fuel tank 10 to which the full tank control valve 30 according to the first embodiment of the present invention is attached is lower than the full tank level F. As shown in FIG. 2, a lid 14 is attached to the oil supply pipe 11. In this case, since the engine is in operation, the fuel pump 41 is also operating, and the jet pump 44 is also operating. Accordingly, the fuel in the housing 31 of the full tank control valve 30 is sucked into the fuel tank 10 by the operation of the jet pump 44 through the discharge passage 60, and the float 34 is located on the bottom side of the housing 31 as shown in FIG. The valve element 33 of the float 34 is separated from the valve seat 32. As a result, the full tank control valve 30 is in an open state, and the internal space of the fuel tank 10 is in the atmosphere via the ventilation passage 50A, the full tank control valve 30, the communication passage 50B, and the atmospheric port 21 of the canister 20. Communicating with

  (2) Car is being refueled.

  In this case, since the engine is stopped, the fuel pump 41 is not operating, and the jet pump 44 is not operating. In the state where the liquid level S of the fuel in the fuel tank 10 is lower than the full tank position F as shown in FIG. 2, when the liquid level S rises with refueling into the fuel tank 10, the air in the internal space becomes The oil flows out into the atmosphere through the ventilation passage 50A, the full tank control valve 30, the communication passage 50B, and the atmospheric port 21 of the canister 20, so that refueling is performed smoothly. When the liquid level S of the fuel in the fuel tank 10 reaches the full tank level F as shown in FIG. 1, the fuel in the fuel tank 10 passes through the ventilation passage 50A and enters the housing 31 of the full tank control valve 30. , Thereby raising the float 34. Eventually, when the valve element 33 of the float 34 is seated on the valve seat 32, the full control valve 30 is shut off, and fuel inflow into the housing 31 via the vent passage 50A is stopped. At the same time, the pressure in the internal space of the fuel tank 10 increases, and fueling is automatically stopped.

  (3) When engine operation is resumed after refueling.

  In this case, since the jet pump 44 is operating, the fuel in the housing 31 of the full tank control valve 30 flows into the fuel tank 10 through the discharge passage 60. Here, when the tip of the ventilation passage 50A in the fuel tank 10 is immersed in the fuel, when the fuel in the housing 31 flows into the fuel tank 10 through the discharge passage 60 by the operation of the jet pump 44, the fuel tank 10 The fuel inside flows into the housing 31 through the ventilation passage 50A. When the fuel level S becomes lower than the tip of the ventilation passage 50A in the fuel tank 10 due to the passage of the engine operation time, the fuel does not flow into the housing 31 from the ventilation passage 50A. Is only sucked into the fuel tank 10 through the discharge passage 60 by the operation of the jet pump 44. Eventually, the fuel in the housing 31 is completely sucked into the fuel tank 10. Even after the fuel in the housing 31 has been completely discharged into the fuel tank 10, the intake port 44 b of the jet pump 44 has a negative pressure during engine operation, so that the air in the housing 31 is sucked through the discharge passage 60. Is done. At the same time, the air in the internal space of the fuel tank 10 flows to the housing 31 via the ventilation passage 50A. That is, air circulates between the internal space of the fuel tank 10 and the housing 31 via the discharge passage 60 and the ventilation passage 50A. When the fuel is consumed by the engine and the liquid level S decreases and the internal space volume increases, air is introduced from the canister 20 into the fuel tank 10 through the ventilation passage 50B, the full tank control valve 30 and the ventilation passage 50A. Is done.

  As described above, in the full tank control valve 30 according to the first embodiment of the present invention, the jet pump 44 that is a discharge means for discharging the fuel that has flowed into the housing 31 of the full tank control valve 30 is provided. After the tank 10 is full, during operation of the engine, the fuel in the housing 31 is sucked into the fuel tank 10 by the operation of the jet pump 44 and the full tank control valve 30 is switched to the communication state. The tank 10 can be refueled. Further, in the full tank control valve 30 according to the first embodiment of the present invention, the valve seat 32 position of the full tank control valve 30 is arranged at a position lower than the full tank liquid level position F in the fuel tank 10. As a result, the function as the full tank control valve 30, that is, the function of opening the fuel tank 10 and communicating with the canister 20 when the fuel in the fuel tank 10 is not full is maintained. However, the height direction dimension of the fuel tank 10 including the full tank control valve 30 can be reduced. Further, in the full tank control valve 30 according to the first embodiment of the present invention, the vertical position of the valve seat 32 is not regulated by the full tank liquid level position of the fuel tank 10. Arrangement position can be set freely. Therefore, it is possible to realize the fuel tank and the full tank control valve 30 that can effectively utilize the space for mounting the fuel tank 10 in the vehicle, that is, can store a large amount of fuel in a limited space. Further, in the full tank control valve 30 according to the first embodiment of the present invention, a check valve 45 that prevents a flow in the direction from the suction port 44 b of the jet pump 44 toward the housing 31 is provided in the middle of the discharge passage 60. For example, when the fuel in the housing 31 is sucked by the jet pump 44 and flows through the discharge passage 60 to the fuel tank 10 and the liquid level S in the fuel tank 10 is higher than the liquid level in the housing 31, the engine Is stopped, fuel may flow back from the fuel tank 10 to the housing 31 through the discharge passage 60 due to the siphon effect, and the full tank control valve 30 may reach a closed state. Therefore, if the check valve 45 is installed in the middle of the discharge passage 60 as in the full tank control valve 30 according to the first embodiment of the present invention, the fuel in the fuel tank 10 passes through the discharge passage 60 while the engine is stopped. Thus, it can be prevented from flowing into the housing 31.

  In the full tank control valve 30 according to the first embodiment of the present invention described above, one dedicated jet pump 44 is additionally installed as a discharge means for discharging fuel from the housing 31 to the fuel tank 10, The pump module 40 may be used as a jet pump 44 that is originally provided in the pump module 40 and introduces fuel outside the sub tank 46 into the sub tank 46. That is, as shown in FIG. 3, the discharge passage 60 may be connected to an introduction pipe 90 that introduces fuel outside the sub tank 46 to the suction port 44 b of the jet pump 44.

(Second Embodiment)
FIG. 4 shows a state in which the full tank control valve 30 according to the second embodiment of the present invention is attached to the inside of the fuel tank 10. The full tank control valve 30 according to the second embodiment of the present invention is based on the first embodiment of the present invention described above except that it is housed and fixed inside the fuel tank 10 as shown in FIG. The same as the full tank control valve 30 and the fuel tank 10. That is, as in the case of the full tank control valve 30 according to the first embodiment of the present invention, the valve of the full tank control valve 30 in the state where the full tank control valve 30 according to the second embodiment of the present invention is attached to the automobile. The seat 32 is arranged to be lower than the full tank level F in the fuel tank 10 in the vertical direction.

  Also with the configuration of the full tank control valve 30 according to the second embodiment of the present invention, the fuel tank 10 mounting space in the vehicle is effectively utilized, that is, the fuel tank and the full tank control capable of storing a large amount of fuel in a limited space. A valve 30 can be provided. Further, since the full tank control valve 30 is assembled in the fuel tank 10 in advance, the installation of the full tank control valve 30 is completed simultaneously with the installation of the fuel tank 10 in the automobile assembly process. Therefore, the number of parts such as piping parts can be reduced and the number of assembly steps can be reduced.

  In the full tank control valve 30 according to the second embodiment of the present invention described above, one dedicated jet pump 44 is additionally installed as a discharge means for discharging fuel from the housing 31 to the fuel tank 10, As described in the description of the full tank control valve 30 according to the first embodiment of the present invention, the configuration that is originally provided in the pump module 40 and also serves as the jet pump 44 for introducing the fuel outside the sub tank 46 into the sub tank 46. It is good.

(Third embodiment)
FIG. 5 shows a state where the full tank control valve 30 according to the third embodiment of the present invention is attached to the inside of the fuel tank 10. The full tank control valve 30 according to the third embodiment of the present invention is different from the previously described full tank control valve 30 according to the second embodiment of the present invention only in the installation location in the fuel tank 10, and other than that. Is the same as that of the full tank control valve 30 according to the second embodiment of the present invention. The full tank control valve 30 according to the third embodiment of the present invention is installed inside the pump module 40, that is, inside the sub tank 46 as shown in FIG. 5.

  Also with the configuration of the full tank control valve 30 according to the second embodiment of the present invention, the fuel tank 10 mounting space in the vehicle is effectively utilized, that is, the fuel tank and the full tank control capable of storing a large amount of fuel in a limited space. A valve 30 can be provided. Moreover, since the full tank control valve 30 is assembled in the pump module 40 in advance, when the pump module 40 is completely installed in the fuel tank 10 in the automobile assembly process, the full tank control valve 30 is also installed at the same time. Complete. Therefore, the number of parts such as piping parts can be reduced and the number of assembly steps can be reduced.

(Fourth embodiment)
FIG. 6 shows a state in which the full tank control valve 30 according to the fourth embodiment of the present invention is attached to the inside of the fuel tank 10. The full tank control valve 30 according to the fourth embodiment of the present invention is different from the previously described full tank control valve 30 according to the third embodiment of the present invention only in the installation location in the pump module 40, and otherwise. Is the same as that of the full tank control valve 30 according to the third embodiment of the present invention. As shown in FIG. 6, the full control valve 30 according to the fourth embodiment of the present invention is disposed in the pump module 40 attached to the inside of the fuel tank 10 so as to overlap the fuel pump 41 in the vertical direction. Yes.

  By the way, the pump module 40 is usually inserted into the fuel tank 10 through an opening provided in the ceiling plate 12 of the fuel tank 10 and attached. The pump module 40 is formed by accommodating a fuel pump 41, a fuel filter 43, a jet pump 44, a full tank control valve 30 and the like in a substantially bottomed cylindrical sub tank 46. That is, the maximum dimension of the pump module 40 is the outer diameter dimension of the sub-tank 46. Therefore, the diameter dimension φD of the opening hole of the ceiling plate 12 of the fuel tank 10 is set so that the pump module 40 can pass through. Has been. On the other hand, from the viewpoint of maintaining the strength of the fuel tank 10, it is desirable that the diameter dimension φD of the opening hole be as small as possible. Accordingly, the diameter dimension φD of the opening hole is set slightly larger than the outer diameter dimension of the sub tank 46.

  The full tank control valve 30 according to the fourth embodiment of the present invention is disposed in the pump module 40 so as to overlap the fuel pump 41 in the vertical direction. Thereby, compared with the case where the full tank control valve 30 is arranged side by side with the fuel pump 41, the diameter dimension of the sub tank 46 can be reduced. Therefore, according to the full tank control valve 30 according to the fourth embodiment of the present invention, while realizing the full tank control valve capable of reducing the height dimension of the fuel tank while maintaining the capacity of the fuel tank, The diameter dimension φD of the opening hole of the ceiling plate 12 of the fuel tank 10 can be further reduced to increase the strength of the fuel tank 10. Moreover, since the planar shape of the pump module 40 with the full tank control valve 30 is reduced, the degree of freedom in designing the shape of the fuel tank 10 that accommodates it can be increased.

  In the full tank control valve 30 according to the first to fourth embodiments of the present invention described above, the jet pump 44 is used as the discharge means for discharging the fuel from the housing 31 to the outside. Various types of discharge means, such as a motor-driven fuel pump, may be used.

FIG. 2 is a schematic view showing a state in which the full tank control valve 30 according to the first embodiment of the present invention is attached to the outside of the fuel tank 10, and shows a state in which filling is completed and the tank is full. FIG. 2 is a schematic view showing a state in which the full tank control valve 30 according to the first embodiment of the present invention is attached to the outside of the fuel tank 10, and shows a state where the liquid level is lower than the full tank position. It is a schematic diagram which shows the modification of the full tank control valve 30 by 1st Embodiment of this invention. It is a schematic diagram which shows the state which attached the full tank control valve 30 by 2nd Embodiment of this invention in the inside of the fuel tank 10, and shows the state which became full after refueling was completed. It is a schematic diagram which shows the state which attached the full tank control valve 30 by 3rd Embodiment of this invention in the inside of the fuel tank 10, and shows the state which became full when refueling was completed. It is a schematic diagram which shows the state which attached the full tank control valve 30 by 4th Embodiment of this invention to the inside of the fuel tank 10, and shows the state which became full when refueling was completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fuel tank 11 Refueling pipe 12 Ceiling board 13 Bottom surface 14 Lid 20 Canister 21 Atmospheric port 22 Purge port 30 Full control valve 31 Housing 32 Valve seat 33 Valve body 34 Float 40 Pump module 41 Fuel pump 42 Pressure regulator 43 Fuel filter 44 Jet Pump (discharge means)
44a Drive port 44b Suction port 44c Discharge port 45 Check valve 46 Sub tank 50 Ventilation passage 50A, 50B Ventilation passage 60 Discharge passage 70 Supply passage 80 Refueling gun 90 Introducing pipe F Filled liquid surface position S Liquid surface φD Flange diameter

Claims (7)

A full tank control valve that switches the internal space and the canister to a communication state or a shut-off state by a valve member disposed in the middle of a ventilation passage that connects the internal space of the fuel tank and the canister so that they can communicate with each other.
A housing that houses the valve member;
A valve seat constituting one of the valve members and fixed to the housing;
A valve body that constitutes the other of the valve members and that can be seated on the valve seat and that is movable in the housing;
A float that is provided with the valve body and is formed so as to float on fuel and is accommodated in the housing;
Discharging means for discharging the fuel staying in the housing,
The fuel tank side end of the vent passage opens to a position where fuel can flow into the housing through the vent passage when the fuel level in the fuel tank reaches a full tank position.
When fuel flows from the fuel tank into the housing through the ventilation passage and the float is immersed in the fuel, the float receives the buoyancy of the fuel and moves so that the valve body is seated on the valve seat. And the internal space and the canister are cut off,
When the liquid level of the fuel in the fuel tank becomes lower than the full tank position and the fuel in the housing is discharged out of the housing by the operation of the discharge means, the float moves by gravity and the valve body Is a full tank control valve, wherein the internal space and the canister are in communication with each other away from the valve seat.   2. The full tank control valve according to claim 1, wherein the valve seat is disposed at a position lower than the full tank position in the fuel tank.   3. The full tank control valve according to claim 1, wherein the housing is disposed outside the fuel tank.   3. The full tank control valve according to claim 1, wherein the housing is disposed inside the fuel tank. A pump module disposed in the fuel tank for delivering the fuel in the fuel tank to the outside;
5. The full tank control valve according to claim 4, wherein the housing is integrated with the pump module. A pump module disposed in the fuel tank for delivering the fuel in the fuel tank to the outside;
6. The jet pump according to claim 1, wherein the discharging unit is a jet pump that sucks fuel by an ejector action using a part of the fuel discharged from the pump module. 7. Full tank control valve.   The full tank according to claim 6, wherein a check valve for preventing a flow in a direction from the suction port toward the housing is provided in the middle of a fuel passage communicating the housing and the suction port of the jet pump. Control valve.

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