JP2015063950A - Fuel device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel device of a vehicle capable of minimizing transpiration gas emitted to atmosphere from a leakage portion when leakage of the transpiration gas from a fuel tank is detected.SOLUTION: A bypass passage 42 for bypassing a sealing valve 35 is provided between an upstream portion and a downstream portion of a vapor passage 31 sandwiching the sealing valve 35. A bypass valve 43 for releasing the bypass passage 42 from a closed state when the leakage of transpiration gas from a fuel tank 10 is detected by a leakage detection part 27 is provided on the bypass passage 42. By this constitution, when the leakage of the transpiration gas is detected, the sealing valve remains the same (closed) and the bypass passage is released, and a large portion of the leaked transpiration gs is introduced to a vapor passage (whose passage resistance is small) with a larger passage area than a fine leakage portion via the bypass passage, and reaches a canister 50. Thereby, the transpiration gas emitted from the leakage portion can be minimized.

Description

  The present invention relates to a fuel device for a vehicle, and more particularly to a fuel device that suppresses evaporative gas leaking from the inside of a sealed fuel tank to the outside.

In the fuel system of vehicles, especially vehicles that have few opportunities to operate the engine, such as hybrid vehicles that combine a driving motor and engine, the inside of the fuel tank is sealed to prevent the vaporized gas in the fuel tank from being released into the atmosphere. This system prevents the leakage of transpiration fuel outside the fuel tank.
In such a closed system, the vaporized gas in the fuel tank is processed (burned) using the opportunity of engine operation, but the vaporized gas generated during refueling cannot be processed during refueling. In the fuel system, as a countermeasure for refueling, a dedicated canister (for refueling) is used, a vapor passage that connects the fuel tank and the canister, and a normally closed sealing valve that opens and closes the vapor passage. In this case, the fuel tank is sealed by blocking the sealing valve.When refueling, the vaporized gas in the fuel tank is guided to the canister by opening the sealing valve, and the vaporized gas is adsorbed to the canister. The evaporation gas is prevented from being released into the atmosphere from the oil filler (see Patent Document 1). Incidentally, the vaporized gas adsorbed by the canister is purged to the intake side of the engine during engine operation.

By the way, in such a fuel device, in order to manage the fuel tank, it is detected whether or not the vaporized gas leaks from the sealed fuel tank.
For example, by using a leak detection unit including a pressure sensor that detects the pressure in the fuel tank, a control unit, and the like, an appropriate timing when the vehicle is IG on, for example, when the IG is off such as when the user is absent ( Every predetermined time: for example, every 5 hours, etc., the closed space in the fuel tank (the space above the liquid level in the fuel tank, the passage portion that is closed by the sealing valve, and the passage portion that is closed by the filler cap In a closed space including the mist, the presence or absence of leakage of transpiration gas is determined (see Patent Document 1, etc.). By the way, if it is determined that a leak of transpiration gas has occurred, an indicator on the instrument panel of the vehicle informs the user that there is a leak and prompts the user to take measures.

JP2013-19281A

  However, since the sealing valve continues to be sealed after the detection of the leak in the fuel tank has been completed, if a leak has occurred, the vaporized gas in the fuel tank does not go to the canister, causing a leak. Continue to leak from the leak location. For this reason, at the time of parking or the like, the vaporized gas in the fuel tank may be completely released into the atmosphere without the user's awareness.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fuel device for a vehicle in which when a leak of a transpiration gas is detected from the inside of a fuel tank, the transpiration gas released from the leak portion to the atmosphere is minimized.

According to the first aspect of the present invention, a bypass passage that bypasses the sealing valve is provided between the upstream portion and the downstream portion of the vapor passage that sandwiches the sealing valve, and the leak detection unit leaks the vaporized gas from the fuel tank. When this is detected, a bypass valve that opens the bypass path from the closed state is provided.
According to a second aspect of the present invention, the bypass valve includes a normally-closed electromagnetic on-off valve that opens and opens the bypass passage when energized, and a lock unit that locks the valve member in the open state. It was decided to be done.

According to a third aspect of the present invention, the lock means includes a lock member that locks the electromagnetic on-off valve, an elastic member that urges the lock member, and an urging lock member when the electromagnetic on-off valve is open. It has a latching part which stops and locks an electromagnetic on-off valve.
The invention according to claim 4 further includes an energization control unit for deenergizing the electromagnetic on-off valve after the electromagnetic on-off valve is locked.

According to the first aspect of the present invention, when the leakage of the transpiration gas is detected in the closed space in the fuel tank, the bypass valve is opened without changing the sealing valve (closed), so that most of the transpiration gas leaking is Through the bypass passage, it is led to a vapor passage (passage resistance: small) having a passage area larger than that of a minute leak portion, and reaches a canister.
Therefore, even if a situation occurs in which the transpiration gas leaks out of the fuel tank, the transpiration gas released from the leak portion can be minimized.

According to the invention of claim 2, even if a leak in the fuel tank is detected while the vehicle is parked, the bypass valve can be kept open.
According to the invention of claim 3, since a simple structure is required, malfunction or the like can be prevented.
According to invention of Claim 4, the electric power of the battery mounted in the vehicle does not need to be consumed unnecessarily.

The figure which shows schematic structure of the fuel apparatus of the vehicle which concerns on the 1st Embodiment of this invention with a bypass path and a bypass valve. Sectional drawing which shows the structure of the bypass valve with a closed state. Sectional drawing which shows the state which the bypass valve opened. The perspective view which shows the structure of the principal part of the bypass valve. The flowchart which shows the control until a bypass path is open | released as a leak arises in the closed space in a fuel tank. The time chart which shows the condition of each part in the control. Sectional drawing which shows the bypass valve used as the principal part of the 2nd Embodiment of this invention. Sectional drawing which shows the state which the bypass valve opened.

The present invention will be described below based on the first embodiment shown in FIGS.
FIG. 1 shows a schematic configuration of a fuel device used in a vehicle to which the present invention is applied, for example, a hybrid vehicle combining a driving motor and an engine. FIGS. 2 to 6 show the structure and operation of each part of the fuel device. And control.
The fuel device shown in FIG. 1 will be described. 1 is a reciprocating engine (corresponding to the engine of the present application), 10 is a fuel tank for storing fuel (liquid fuel such as gasoline), and 30 is a process for the vaporized gas in the fuel tank 10. The transpiration gas processing unit 50 is a dedicated canister (during refueling) provided in the transpiration gas processing unit 30.

Explaining each part, the engine 1 combined with the traveling motor has an intake manifold 2, a surge tank 3, a throttle valve 4, an air cleaner 5 and the like on the intake side (all of which constitute an intake passage of the engine 1). . A fuel injector 6 is attached to the intake manifold 2.
The fuel tank 10 is formed by a flat tank, for example. A fuel cut valve 11 (for example, a float valve) and a leveling valve 13 (for example, a float valve) connected to the valve 11 via a two-way valve 12 are disposed in the upper part of the fuel tank 10. Has been. The vicinity of the position of the opening at the lower part of the leveling valve 13 that is blocked by the fuel level is defined as the full tank position of the fuel tank 10.

  A fuel pump 15 is installed at the bottom of the fuel tank 10. The fuel passage 14 extending from the discharge portion of the fuel pump 15 is connected to the fuel injector 6 so that the fuel in the fuel tank 10 is supplied from the fuel injector 6 to a combustion chamber (not shown) of the engine 1. Yes. Note that the return path from the fuel injector 6 to the fuel tank 10 is not shown. Alternatively, the supply pressure may be regulated in the fuel tank 10 and returned (not shown).

  Further, a fuel pipe 17 and a recirculation pipe 18 are provided on the side wall of the fuel tank 10. The outlet side of the fuel pipe 17 is connected to, for example, the middle stage of the side wall of the fuel tank 10, and the inlet side of the fuel pipe 17 communicates with a fuel box 19 provided at a point above the fuel tank 10, for example, the same point. The fuel filler opening 20 is connected. The fuel filler opening 20 is closed by a fuel cap 21 so as to be opened and closed, and the opening of the fuel box 19 is closed by a rotating fuel lid 23. The fuel lid 23 is releasably locked by the lid actuator 22, and when the fuel cap 21 is opened by releasing the lock, the fuel tank is opened from the fuel filler port 20 by a fuel gun (not shown) of the fuel filler. 10 can be refueled. Incidentally, a pressure sensor 24 for detecting the internal pressure of the fuel tank 10 is provided on the upper wall of the fuel tank 10. Alternatively, a pressure sensor may be provided in the vapor passage 31 between the upper part of the fuel tank 10 and a sealing valve 35 described later (not shown).

  One end of the recirculation pipe 18 is connected in communication with the vicinity of the fuel filler opening 20 of the fuel pipe 17. The other end of the recirculation pipe 18 passes through the upper stage of the side wall of the fuel tank 10. The opening at the tip is arranged near the full tank position defined by the leveling valve 13, for example, slightly below the full tank position, so that the fuel can be smoothly supplied until the full tank position is reached.

  The canister 50 uses a device with a leak check module 51, specifically, a device used for a leak check in the fuel tank 10. Specifically, the canister 50 is composed of a container containing activated carbon (not shown). Although not shown, this container has two inlets and outlets on the side of the transpiration gas and the inlet and outlet on the atmosphere side. The transpiration gas inlet / outlet may be composed of two inlets / outlets on the fuel tank 10 side and the engine 1 side (not shown). Of these, a leak check module 51 is provided at the air-side entrance / exit. The leak check module 51 includes, for example, a fuel tank 10 such as a negative pressure pump 52, a switching valve 54 that switches communication between the negative pressure pump 52 and the vent pipe 53, and a pressure sensor (not shown) that detects the pressure in the canister 50. This is a modularized collection of devices used for leak checking. Incidentally, the vent pipe 53 is provided with a filter 55.

  The transpiration gas processing unit 30 includes, for example, a vapor passage 31 communicating between the leveling valve 13 and the transpiration gas side inlet / outlet of the canister 50, an end portion on the inlet / outlet side of the vapor passage 31, and an intake passage of the engine 1, for example, A purge passage 32 communicating the intake passage portion between the surge tank 3 and the throttle valve 4, a normally closed sealing valve 35 and a barge valve 36, a normally open canister valve provided in each portion of the passages 31, 32. 37 and a control unit 38 (for example, an electronic unit composed of a CPU, a ROM, a RAM, etc.) for controlling these valves are used.

  Specifically, the sealing valve 35 is provided along with the bidirectional safety valve 40 in the middle of the vapor passage 31. The purge valve 36 is provided in the middle of the purge passage 32, and the canister valve 37 is provided at the inlet / outlet of the canister 50 on the vaporized gas side. And the sealing system which seals the inside of the fuel tank 10 under normal conditions is comprised by the characteristic of each valve. Specifically, in the normal state, a region δ surrounded by a one-dot chain line in FIG. 1, that is, a space above the liquid level in the fuel tank 10, a purge passage portion closed by the sealing valve 35, a fuel cap 21 The closed space in the fuel tank 10 including the space up to the fuel pipe portion blocked by the air is kept in a sealed state so that the vaporized gas (gas in which the fuel has evaporated) in the fuel tank 10 does not leak out of the fuel tank 10. ing.

  In order to process the vaporized gas in the fuel tank 10, for example, when the engine 1 is operated under a predetermined condition, the control unit 38 opens the barge valve 36 and the sealing valve 35, and sets the canister valve 37. The function to close is set. With this function, the vaporized gas in the fuel tank 1 is purged to the intake passage of the engine 1 during operation through the fuel cut valve 11, the leveling valve 13, the vapor passage 31, and the purge passage 32, and is processed (combusted) in the engine 1. Is done.

  In addition, the control unit 38 has a function of preventing the transpiration gas in the fuel tank 1 from being released into the atmosphere from the fuel filler port 20 during refueling. For example, in order to perform refueling, when the lid switch 39 is operated to release the lock of the fuel lid 23, the sealing valve 35 is opened, and the switching valve 54 of the leak check module 51 is switched to the atmosphere opening side. Consists of. Thus, when the fuel tank 10 is refueled, the sealed state is released, and the vaporized gas in the fuel tank 1 is guided to the canister 50 through the fuel cut valve 11, the leveling valve 13, the vapor passage 31, and the canister valve 37. , Prevents the release of transpiration gas from the fuel filler 20 (adsorption of transpiration gas with activated carbon).

Incidentally, the control unit 38 prevents the fuel from flowing out from the fuel filler port 20 (due to an increase in tank internal pressure) during refueling, after the pressure in the fuel tank 10 is sufficiently reduced by the opening operation of the sealing valve 35. A function for opening the lid 23 (unlocking by the lid actuator 22) is set.
In addition, a leak check function for checking the sealing property of the fuel tank 10 is set in the control unit 38 in order to manage the sealing system. For example, the leak check function operates the negative pressure pump 52, for example, at an appropriate time when the vehicle is turned on or off (when parked), and the switching valve 54 is switched to the negative pressure pump 52 side to seal it. A function of opening the valve 35 and lowering the fuel tank 10 to a predetermined pressure value by the negative pressure generated by the negative pressure pump 52; a function of leaving the fuel tank 10 in a sealed state at the same pressure value; a pressure sensor Using the pressure value of 24, from the change in the pressure value in the fuel tank 10 after a predetermined time has elapsed, the region δ in the fuel tank 10 (the space in the fuel tank 10, the passage portion closed by the sealing valve 35, This includes a function for determining whether or not there is a leak of vaporized gas in a closed space including a passage portion to the fuel filler port 20 closed by the fuel cap 21. By the way, if it is determined that there is a leak, the vehicle instrument panel or the like notifies the user that there is a leak (an indicator or the like) and prompts the measure. The leak detection function 27, the leak check module 51, the control unit 38, and the like constitute a leak detection unit 27 that detects leakage of the vaporized gas from the fuel tank 10.

  By the way, since the sealing valve 35 constituting the sealing system continues to be in a sealed state after the leak check is performed, when the transpiration gas leaks from the inside of the fuel tank 10, the transpiration gas leaks only from the leak portion. Therefore, all of the transpiration gas in the fuel tank 10 is released into the atmosphere. In particular, when the user is absent, such as when parking, the vaporized gas in the fuel tank 10 is all released from the leak location to the atmosphere without the user's awareness.

Therefore, as a countermeasure against this leak, the bypass passage 31 bypasses the inside of the fuel tank 10 and the canister 50 when it is determined in the leak check that the vaporized gas leaks (leak detection). 45 is provided.
The bypass structure 45 includes a bypass passage 42 that communicates between an upstream portion and a downstream portion of the vapor passage 31 sandwiching the sealing valve 35, for example, between an upstream portion and a downstream portion immediately before and after the safety valve 40 (in the present application). Equivalent to a bypass passage) and a bypass valve 43 interposed in the bypass passage 42. The entire structure of the bypass valve 43 is shown in FIGS. 2 and 3, and the main part of the bypass valve 43 is shown in FIG.

As shown in FIGS. 2 and 3, the bypass valve 43 has a structure in which a normally closed electromagnetic on-off valve 60 is combined with a lock unit 61 that can be changed to a normally open state.
Specifically, for example, the electromagnetic on-off valve 60 is provided with an annular coil 63 around a cylindrical portion 62 formed of an elongated cylindrical yoke, and a return spring 65 and a plunger 66 are accommodated in the cylindrical portion 62 so as to be able to advance and retract. A solenoid 67 configured as described above, and a valve portion 68 provided at the tip of the cylindrical portion 62. The valve portion 68 includes a valve main body 70 in which an I-shaped valve chamber 70a is formed, a pair of inlet / outlet portions 71a and 71b provided at the center and side walls of the valve chamber 70a, and a valve chamber 70a of the valve main body 70. The bottomed cylindrical valve member 73 is slidably accommodated therein, and the flow passage 69 between the inlets 71a and 71b can be opened and closed by the movement of the valve member 73. Specifically, the peripheral side wall 73a of the valve member 73 is in sliding contact with the inner peripheral surface of the valve chamber 70a. Further, the front wall 73b of the valve member 73 includes a plurality of arc-shaped through holes 72a formed on the outer peripheral side as shown in FIG. 4, and a circular seat portion 72b provided in the center portion (rather than the opening of the doorway 71a). Large). The entrance / exit portions 71 a and 71 b are interposed in the middle of the bypass passage 42.

  The plunger 66 and the valve member 73, here, the central portion of the front wall 73b are connected via a connecting rod 74, and the front side of the solenoid member 67 is displaced by the non-energized state and the energized state of the solenoid 67. The doorway 71a is opened and closed. That is, the front-side entrance / exit 71a is blocked by the seat portion 72b of the valve member 73 urged by the return spring 65 when the coil 63 is not energized (de-energized) (FIG. 2). When energized (excitation), the valve member 73 is opened by retraction of the seat portion 72b as the valve member 73 retreats, and communicates between the entrances 71a and 71b (FIG. 3). Thereby, the electromagnetic on-off valve 60 is normally closed that closes the bypass passage 42 when not energized and opens the bypass passage 42 when energized.

  The locking means 61 includes, for example, a lock mechanism 80 provided on the side wall of the valve body 70 as shown in FIGS. 2 to 4 and a solenoid energization control function set in the control unit 38 (corresponding to the energization control unit of the present application). And is configured. The lock mechanism 80 includes, for example, a pin hole 81 provided in a side wall of the valve main body 70 as shown in FIGS. 2 to 4 and penetrating in the diametrical direction, and a pin member slidably inserted into the pin hole 81. 82 (corresponding to the lock member of the present application), an urging spring 83 (corresponding to the elastic member of the present application) for urging the pin member 82 toward the inside of the valve body 70, and an open state by the urged pin member 82 A structure in combination with a locking structure for locking the valve member 73 is used. Further, the urging spring 83 and the pin member 82 outside the valve body 70 are covered with a cover member 85 so that the urging spring 83 is supported.

  That is, when the valve member 73 is in the closed position as shown in FIGS. 2 and 3, the pin hole 81 is closed at the end of the pin hole 82 by the peripheral side wall 73a of the valve member 73. When in the open position, the end of the pin hole 82 is set to the open position. Thereby, when the coil 63 is not energized, that is, when the valve member 73 is in the closed state, the pin member 82 stands by on the peripheral side wall 73a of the valve member 73, the coil 63 is energized, and the valve member 73 is opened. When the state is reached, the pin member 82 protrudes into the valve chamber 70a. The distal end portion of the pin member 82 is engaged with an engaging portion (corresponding to an engaging portion of the present application) formed on the valve member 73 in the open state, here, the end of the peripheral side wall 73a (including the front wall 73b) of the valve member 73. The valve member 73 is locked in the open state.

  The solenoid energization control function performs a leak check of the fuel tank 10, and when it is detected that the vaporized gas has leaked from the inside of the fuel tank 10, the solenoid 67 is energized once, and then the solenoid 67 is turned off. It is set to energize. That is, when the leakage of the transpiration gas occurs, the valve member 73 is opened by energization of the solenoid 67. Thereby, the valve member 73 is locked in the open state by the protruding pin member 82. Then, the valve member 73 is maintained in the open state by the subsequent non-energization control by the continuation of the locked state by the elastic force of the urging spring 83 and the elastic force of the return spring 65 (normally open state). ). By this control, leakage of the transpiration gas from the leak location is suppressed.

Control for suppressing leakage of the transpiration gas is shown in the flowchart of FIG. 5 and the chart time of FIG.
Referring to FIGS. 2, 3, 5, and 6, the technology for suppressing the leakage of the vaporized gas will be described. In step S <b> 1 in FIG. 5, in the closed system, when the IG switch is turned on, the IG A leak check in the fuel tank 10 is performed at an appropriate time of switch-off.

  In the leak check, the negative pressure generated in the negative pressure pump 52 is supplied into the fuel tank 10 by the operation of the negative pressure pump 52, the switching operation of the switching valve 54, and the opening operation of the sealing valve 35. The pressure is lowered to a predetermined pressure value, the fuel tank 10 is left in a sealed state at the same pressure value, and the vaporized gas in the region δ in the fuel tank 10 is changed from the change in the pressure value in the fuel tank 10 after a predetermined time has elapsed. This is done by determining whether there is a leak.

  At this time, when a change in the pressure in the fuel tank 10 is observed, there is a portion where the vaporized gas leaks to the outside in the region δ of the fuel tank 10 as seen in “leak detection” in FIG. 6. Is determined. Then, the process proceeds from step S2 to step S3, and energization of the solenoid 67 is performed. Then, the plunger 66 is retracted, the valve member 73 is retracted to the open position, and the seat portion 72b is separated from the entrance / exit 71a (FIG. 3). Then, the entrance / exit 71a is opened and communicated with the entrance / exit 71b. Thereby, the bypass path 42 is opened.

  At this time, since the pin hole 81 is opened as the valve member 73 is displaced to the open position, the pin member 82 that has been waiting protrudes to the front of the front wall 73a of the valve member 73, and the valve member 73 is moved away. Blocking and restricting the valve member 73 from being closed. That is, the valve member 73 is locked in the open state. Next, the process proceeds to step S4, and the solenoid 67 is deenergized. As a result, the valve member 73 continues to be locked in the open state under normal conditions. That is, the bypass valve 43 is changed from the normally closed state to the normally open state. The bypass passage 42 continues to be opened in the normally open bypass valve 43.

  Thereby, most of the transpiration gas leaking from the inside of the fuel tank 10 is led from the bypass passage 42 bypassing the sealing valve 35 to the vapor passage 31 (passage resistance: small) having a passage area larger than that of the fine leak portion, The canister 50 is reached. That is, the transpiration gas is adsorbed on the activated carbon of the canister 50. Note that the switching valve 54 of the leak check module 51 is switched to the open side so that the transpiration gas is easily adsorbed.

Therefore, even if a situation occurs in which the transpiration gas leaks out of the fuel tank 10, most of the transpiration gas is adsorbed by the canister, so that the transpiration gas released from the leak portion of the fuel tank 10 is minimized. Can be suppressed.
In addition, since the bypass valve 43 is provided with the lock means 61 that locks the valve member 73 of the electromagnetic on-off valve 60 in the open state, even if a leak in the fuel tank 10 is detected while the vehicle is parked, The valve 43 can be kept open. In particular, by controlling the electromagnetic on / off valve 60 to be in a non-energized state, the power of the battery mounted on the vehicle is not consumed unnecessarily.

In addition, the lock means 61 controls the pin member 82, the urging spring 83, and the latching portion (end of the peripheral side wall 73) that engages with the urged pin member 82, or the solenoid 67 is deenergized. All that is required is a simple structure. Moreover, since it is simple, malfunctions can be prevented.
7 and 8 show a second embodiment of the present invention.

This embodiment is a modification of the first embodiment, and the lock mechanism 80 is not provided in the valve body 70 as in the first embodiment, but is provided in the valve member 73.
Specifically, for example, a pin module 94 is provided on the peripheral side wall 73a of the valve member 73 so that the urging spring 90 and the pin member 91 are accommodated in the holder 89 so that the pin member 91 can protrude and retract. An engagement hole 95 that can be engaged with the tip of the pin member 91 is provided on the peripheral surface. When the valve member 73 is displaced (retracted) to the open position, the pin member 91 comes out and engages with the engagement hole 95. The valve member 72 in the open state is stopped and locked (FIG. 8).

Even if such a lock mechanism 80 is used, the vaporized gas from the leaked portion of the fuel tank can be minimized with a simple structure as in the first embodiment.
Further, as shown by the two-dot chain line in FIGS. 7 and 8, a through-hole penetrating the valve main body 70 is used for the locking hole 95, and the inlet / outlet port 70b on the side of the valve chamber 70a is closed. The position may be changed to a position that is closed by the peripheral side wall 73a of the member 73. In this way, after repairing the leaked portion of the fuel tank, a tool, for example, the tip of a driver tool is inserted into the through hole from the outside. When the pin member 91 is pushed in, the bypass 43 returns to normally closed again, and the bypass 43 can be reused any number of times. Of course, the opening end that opens to the outside of the through hole (locking hole 95) is closed with a lid member 97 to suppress waterproofing and permeation from the canister.

However, in FIG. 7 and FIG. 8, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The present invention is not limited to the above-described embodiments, and may be implemented in various ways without departing from the spirit of the present invention. For example, in the above-described embodiment, the structure in which the bypass valve is locked in the open state by using the pin member has been described. However, when the vaporized gas leaks, the bypass valve is locked in the open state by using another structure to bypass the bypass valve. The passage may be kept open. Moreover, although the sealing system using a canister valve was mentioned in the above-described embodiment, the present invention is not limited to this, and a sealing system that does not use a canister valve may be used.

DESCRIPTION OF SYMBOLS 10 Fuel tank 27 Leak detection part 31 Vapor path 35 Sealing valve 38 Control part (energization control part)
42 Bypass passage (bypass)
43 Bypass valve 50 Canister 60 Electromagnetic on-off valve 61 Locking means 73a Peripheral side wall (locking portion)
80 Lock mechanism 82 Pin member (lock member)
83 Biasing spring (elastic member)

Claims (4)

A fuel tank for storing fuel;
A canister that adsorbs fuel evaporative gas generated in the fuel tank;
A vapor passage that communicates the inside of the fuel tank and the canister and guides the evaporated gas in the fuel tank to the canister;
A sealing valve provided in the vapor passage, sealing the vapor passage and sealing the inside of the fuel tank;
A bypass passage that bypasses the sealing valve by communicating an upstream portion and a downstream portion of the vapor passage sandwiching the sealing valve;
A leak detection unit for detecting a leak of fuel vaporized gas from the closed space in the sealed fuel tank to the outside;
A fuel device for a vehicle, comprising: a bypass valve that opens the bypass path from a closed state when a leak of transpiration gas is detected from the fuel tank by the leak detection unit. The bypass valve is
A normally closed electromagnetic on-off valve that closes the bypass path in a non-energized state and opens the bypass path in an energized state;
The vehicle fuel device according to claim 1, further comprising: a lock unit that locks the electromagnetic on-off valve in the open state. The locking means is
A locking member for locking the electromagnetic on-off valve;
An elastic member for biasing the lock member;
The fuel device for a vehicle according to claim 2, further comprising: a locking portion that locks the electromagnetic open / close valve by locking with the biased lock member when the electromagnetic open / close valve is opened.   The vehicle fuel device according to claim 3, further comprising an energization control unit configured to deenergize the electromagnetic on-off valve after the electromagnetic on-off valve is locked.

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