JP2019203493A - Evaporation fuel treatment device - Google Patents

Abstract

To shorten a waiting time necessary for the reduction of pressure in a fuel tank at oil supply.SOLUTION: An evaporation fuel treatment device comprises a block valve for opening and closing a flow passage of a vapor passage for connecting a fuel tank and a canister to each other, and an opening/closing control part for controlling the opening and closing of the block valve. The evaporation fuel treatment device also comprises a position specifying part for storing map data in which positional information of a fuel supply facility is described, and acquiring information of a current position of an own vehicle. The position specifying part calculates a distance from the current position of the own vehicle up to the fuel supply facility on the basis of the map data and the information of the current position of the own vehicle (step S220). When the fuel supply facility exists within a range not longer than a prescribed distance Z from the current position of the own vehicle, the opening/closing control part performs pressure-reduction processing for opening the block valve (step S230).SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fuel vapor processing apparatus.

  In the evaporative fuel processing apparatus disclosed in Patent Document 1, a vapor passage extends from the inside of a fuel tank that stores fuel for an internal combustion engine. The vapor passage is connected to a canister that adsorbs and collects the evaporated fuel generated in the fuel tank. A purge passage extends from the canister. The purge passage is connected to the intake passage of the internal combustion engine. In the middle of the vapor passage, a blocking valve for opening and closing the flow passage of the vapor passage is provided. A control valve for adjusting the amount of fuel vapor introduced into the intake passage is provided in the middle of the purge passage. The blocking valve and the control valve are controlled by a control device.

  In addition, a fuel pipe extends from the fuel tank, and an opening on one side of the fuel pipe serves as a fuel filler port for fueling. The fuel filler opening is covered with a lid door so that it can be opened and closed. The control device unlocks the lid door according to the input signal of the lid switch operated by the user.

  In the evaporated fuel processing apparatus, the control device closes the block valve while the internal combustion engine is stopped. When the user operates the lid switch for refueling, the control device opens the block valve to release the internal pressure of the fuel tank, lower the internal pressure to near atmospheric pressure, and then lock the lid door. Is released.

JP 2004-156696 A

  In the above evaporative fuel processing device, the waiting time required for decompression in the fuel tank after the user operates the lid switch and before the lid door is unlocked by the control device and the actual refueling operation becomes possible. Will occur. For example, when the internal pressure of the fuel tank is excessively high, the above-described waiting time becomes long, and accordingly, it takes a considerable amount of time before refueling becomes possible.

  An evaporative fuel processing apparatus for solving the above-mentioned problems is characterized in that a vapor passage having one end communicating with a fuel tank, and the other end of the vapor passage are connected, and evaporative fuel generated in the fuel tank is removed. Evaporative fuel processing comprising a canister that is adsorbed and collected, a sealing valve that is provided in the middle of the vapor passage, opens and closes the flow path of the vapor passage, and an opening and closing control unit that controls opening and closing of the sealing valve A device that stores the map data describing the position information of the fuel supply facility, and a lid control unit that unlocks the lid door that covers the fuel filler port for refueling the fuel tank. A position specifying unit that acquires information on a current position of the lid, and the lid control unit receives an input signal from a lid switch operated by a user when the lid door is opened. The lid door is unlocked on the condition that the internal pressure of the fuel tank is reduced to a predetermined value or less, and the position specifying unit is configured to detect the map data and the current position of the host vehicle. Based on the information, the distance from the current position of the host vehicle to the fuel supply facility is calculated, and the opening / closing control unit has the fuel supply facility within a range of a predetermined distance or less from the current position of the host vehicle. In this case, a decompression process for opening the blocking valve is performed.

  According to the above configuration, when the vehicle stops in the fuel supply facility, the pressure reduction in the fuel tank has already started. Therefore, when the user stops the vehicle in the fuel supply facility and operates the lid switch, there is a high probability that the internal pressure of the fuel tank is reduced to a predetermined value or less or close to a predetermined value. Therefore, it is possible to shorten the waiting time from when the user operates the lid switch until the lid door is unlocked.

  In the evaporative fuel processing apparatus, the lid control unit is configured so that the internal pressure of the fuel tank is reduced to a predetermined value or less and the vehicle speed of the host vehicle is less than a determination vehicle speed. May be unlocked.

According to the above configuration, it is possible to prevent the lid door from being inadvertently unlocked when the vehicle speed is high.
In the evaporative fuel processing apparatus, the open / close control unit may close the block valve when the internal pressure of the fuel tank decreases to a predetermined value or less after the decompression process.

  If the valve is kept open after the block valve is opened, the evaporated fuel continues to flow from the fuel tank to the canister, and the remaining capacity of the evaporated fuel adsorption amount in the canister decreases. . In this regard, according to the above-described configuration, the block valve is closed when the internal pressure of the fuel tank is reduced to a predetermined value or less, so that it is possible to suppress a decrease in the remaining capacity of the adsorption amount of the evaporated fuel in the canister.

1 is a schematic view of an internal combustion engine to which an evaporative fuel processing apparatus is applied. The flowchart showing the process sequence of the oil supply process. The flowchart showing the process sequence of a preparation process.

Hereinafter, an embodiment of an internal combustion engine to which an evaporated fuel processing apparatus is applied will be described with reference to the drawings.
As shown in FIG. 1, an internal combustion engine 100 that constitutes a part of a drive source of the vehicle is mounted on the hybrid vehicle. Although not shown, the hybrid vehicle is also equipped with a motor generator that constitutes a part of the drive source of the vehicle separately from the internal combustion engine 100. The motor generator receives power supply from the battery and applies driving force (rotational torque) to the driving wheels.

  The internal combustion engine 100 includes a cylinder 12 in which a piston 23 is accommodated so as to be capable of reciprocating. An intake passage 11 for introducing intake air from the outside extends into the cylinder 12 from the cylinder 12. Further, an exhaust passage 13 for exhausting the exhaust in the cylinder 12 to the outside extends from the cylinder 12.

  A throttle valve 21 that adjusts the amount of intake air is provided midway in the extending direction of the intake passage 11. A surge tank 25 for reducing pulsation of intake air is provided on the intake passage 11 downstream of the throttle valve 21 from the intake valve. A fuel injection valve 22 for injecting fuel into an opening on the cylinder 12 side in the intake passage 11 is provided on the intake passage 11 downstream of the surge tank 25 in the intake passage 11.

  The fuel injection valve 22 is connected via a fuel supply passage 38 to a fuel tank 31 in which the fuel of the internal combustion engine 100 is stored. Although not shown, a feed pump is provided inside the fuel tank 31, and when the feed pump is driven, the fuel in the fuel tank 31 is supplied to the fuel injection valve 22 via the fuel supply passage 38. Is done. The fuel tank 31 is provided with an internal pressure sensor 35 of the evaporated fuel processing device 50. The internal pressure sensor 35 detects the internal pressure Ps of the fuel tank 31.

  A fuel pipe 32 extends from the fuel tank 31. An opening at the tip of the fuel pipe 32 serves as a fuel filler port 33 for supplying fuel to the fuel tank 31. A cap 34 is detachably attached to the fuel filler port 33. A lid door 90 is disposed outside the cap 34. The lid door 90 covers the fuel filler port 33 and the cap 34. In a state where the lid door 90 covers the fuel filler 33 and the cap 34, the fuel filler 33 and the cap 34 are not exposed to the outside of the vehicle.

  The lid door 90 can be opened and closed by a door opening / closing mechanism 92. That is, the lid door 90 can be changed from a closed state that covers the fuel filler port 33 and the cap 34 to an open state that opens the fuel filler port 33 and the cap 34 to the outside. Although illustration is omitted, the door opening / closing mechanism 92 includes a biasing member that biases the lid door 90 in the opening direction, and a holding member that holds the lid door 90 in a closed state. Since the lid door 90 is held by the holding member, the lid door 90 is locked in the closed state. When the holding by the holding member is released, that is, when the lock is released, the lid door 90 is opened by the urging force of the urging member. The vehicle is provided with a lid switch 98 for a user to input an instruction to unlock the lid door 90. Although illustration is omitted, the vehicle is provided with a manual opening / closing device for the user to manually unlock the lid door 90.

  A lid sensor 94 is provided in the vicinity of the lid door 90. The lid sensor 94 detects the opening / closing position LS of the lid door 90. The lid sensor 94 detects that the lid door 90 is in the closed position when the lid door 90 is in the position held by the holding member. The lid sensor 94 detects that the lid door 90 is in the open position when the lid door 90 is not in the position held by the holding member.

  A vapor passage 51 of the evaporated fuel processing device 50 is connected to the fuel tank 31. Specifically, a vapor passage 51 that guides the evaporated fuel generated in the fuel tank 31 to the outside of the fuel tank 31 extends from the fuel tank 31. That is, the vapor passage 51 is communicated with the fuel tank 31 at one end thereof. The other end of the vapor passage 51 reaches the outside of the fuel tank 31. A sealing valve 60 for opening and closing the flow path of the vapor passage 51 is provided midway in the extending direction of the vapor passage 51.

  The other end of the vapor passage 51 is connected to a canister 52 that adsorbs and collects evaporated fuel. Inside the canister 52, an adsorbent such as activated carbon is accommodated, and up to a certain amount of evaporated fuel can be adsorbed by the adsorbent.

  A purge passage 55 extends from the canister 52. The purge passage 55 is connected to the surge tank 25 in the intake passage 11. In the middle of the extending direction of the purge passage 55, a purge control valve 65 for opening and closing the flow passage of the purge passage 55 is provided. Further, an atmospheric passage 53 for introducing outside air into the canister 52 extends from the canister 52. The atmospheric passage 53 is open to the atmosphere.

  The controller 80 controls the opening and closing of the blocking valve 60 and the purge control valve 65 and the unlocking of the lid door 90. The control device 80 is a computer that includes a nonvolatile ROM storing various programs (software), a CPU that executes various programs, a volatile RAM that temporarily stores data when the programs are executed, and the like. is there. The control device 80 controls the entire internal combustion engine 100 such as the opening degree of the throttle valve 21 and the fuel injection amount of the fuel injection valve 22 in addition to the control of the blocking valve 60, the purge control valve 65, and the lid door 90. It is configured as an electronic control unit (ECU).

  The control device 80 receives signals from various sensors and antennas provided in the vehicle. Specifically, the vehicle is provided with a vehicle speed sensor 72 that detects the traveling speed (vehicle speed SP) of the vehicle. A signal related to the vehicle speed SP detected by the vehicle speed sensor 72 is input to the control device 80. The vehicle is equipped with a GPS antenna 74 that receives a GPS signal G supplied from a GPS satellite. The GPS signal G received by the GPS antenna 74 is input to the control device 80. In addition to the above signals, the control device 80 receives a signal related to the internal pressure Ps of the fuel tank 31 detected by the internal pressure sensor 35 and the opening / closing position LS of the lid door 90 detected by the lid sensor 94. The control device 80 receives an input signal W from a lid switch 98 that is operated by a user when the lid door 90 is opened.

  The control device 80 includes an opening / closing control unit 81 that controls opening / closing of the blocking valve 60 and the purge control valve 65. The opening / closing control unit 81 outputs a signal requesting opening or closing of the closing valve 60 and the purge control valve 65. Based on this signal, the blocking valve 60 and the purge control valve 65 are opened or closed.

  The control device 80 includes a lid control unit 84 that unlocks the lid door 90. The lid control unit 84 outputs a signal for releasing the holding (locking) of the lid door 90 to the holding member of the door opening / closing mechanism 92. Based on this signal, the lid door 90 is unlocked.

  The control device 80 includes a position specifying unit 86 that acquires information on the current position of the vehicle. The position specifying unit 86 acquires information on the current position of the host vehicle by converting the GPS signal G into information on the current position of the host vehicle. The position specifying unit 86 stores map data in which position information of the fuel supply facility is described. The position specifying unit 86 calculates a distance D from the current position of the own vehicle to the fuel supply facility based on the map data and information on the current position of the own vehicle.

  Next, specific opening / closing control of the blocking valve 60 and the purge control valve 65 by the opening / closing controller 81 will be described together with the operation state of the internal combustion engine 100. The opening / closing control unit 81 controls opening / closing of the blocking valve 60 and the purge control valve 65 so that the remaining capacity of the adsorbed amount of the evaporated fuel in the adsorbent of the canister 52 does not decrease.

  While the internal combustion engine 100 is stopped, the open / close control unit 81 closes the block valve 60. The fuel tank 31 is sealed by closing the closing valve 60. Therefore, the evaporated fuel generated in the fuel tank 31 is confined in the fuel tank 31. While the internal combustion engine 100 is stopped, the opening / closing control unit 81 also closes the purge control valve 65.

  During the operation of the internal combustion engine 100, the opening / closing control unit 81 opens the purge control valve 65 when a predetermined purge condition is satisfied, and closes the purge control valve 65 when the purge condition is not satisfied. The purge condition is, for example, that when the intake downstream side of the intake passage 11 is at a negative pressure with respect to the atmospheric pressure, the negative pressure is greater than the reference negative pressure. When the purge control valve 65 is open, the evaporated fuel is desorbed from the adsorbent of the canister 52 by the air flowing into the canister 52 through the atmospheric passage 53, and the desorbed evaporated fuel passes through the purge passage 55. And introduced into the intake passage 11. The evaporated fuel introduced into the intake passage 11 is burned in the cylinder 12.

  During the operation of the internal combustion engine 100, the open / close control unit 81 is a sealing valve in order to keep the internal pressure Ps of the fuel tank 31 in the vicinity of the atmospheric pressure in a situation where the remaining capacity of the adsorbed amount of the evaporated fuel in the adsorbent of the canister 52 does not decrease. 60 is appropriately opened and closed. Specifically, the open / close control unit 81 opens the block valve 60 when the purge control valve 65 is opened and the internal pressure Ps of the fuel tank 31 is equal to or higher than a specified value. The specified value is a value near atmospheric pressure. When the blocking valve 60 is opened with the purge control valve 65 opened as described above, the evaporated fuel flowing into the canister 52 through the vapor passage 51 passes through the canister 52 and is introduced into the intake passage 11. The In addition, the opening / closing control unit 81 closes the closing valve 60 when the purge control valve 65 is open and the internal pressure Ps of the fuel tank 31 is less than the specified value. The open / close control unit 81 also closes the blocking valve 60 even when the purge control valve 65 is closed during operation of the internal combustion engine 100.

  In addition to the above-described pattern opening / closing control, the opening / closing control unit 81 controls opening / closing of the blocking valve 60 as a preliminary preparation for refueling the fuel tank 31 by the user. Specifically, the opening / closing control unit 81 executes a decompression process for opening the block valve 60 when the fuel supply facility exists within a predetermined distance Z (for example, 20 m) or less from the current position of the host vehicle. Further, the opening / closing control unit 81 determines that the internal pressure Ps of the fuel tank 31 detected by the internal pressure sensor 35 after the execution of the pressure reduction process is a predetermined value Pt that is equal to or lower than a value near atmospheric pressure (for example, 2 kPa). When the pressure is lowered to the maximum, the block valve 60 is closed. Note that the lid switch 98 is operated by the user when refueling. When the lid control unit 84 receives the input signal W from the lid switch 98, the lid control unit 84 confirms that the internal pressure Ps of the fuel tank 31 is less than or equal to a predetermined value P and that the vehicle speed is less than the determination vehicle speed (for example, 4 km / h). Under the condition, the lid door 90 is unlocked.

  As a process for realizing the opening / closing control of the blocking valve 60 related to the fuel supply to the fuel tank 31 and the unlocking of the lid door 90, the control device 80 performs a fuel supply process and a preparation process. In addition, when performing the refueling process and the preparatory process, the control device 80 has priority over the opening / closing control of the block valve 60 associated with the processes other than the refueling process and the preparatory process, and the control valve 80 Open / close control is performed. Hereinafter, the flow of the refueling process and the preparation process will be described. First, the oil supply process will be described with reference to FIG.

  When the lid control unit 84 of the control device 80 receives the input signal W from the lid switch 98 operated by the user, the process proceeds to step S10. In step S10, the opening / closing control unit 81 of the control device 80 determines whether or not the vehicle speed SP is less than the determination vehicle speed SS. When it is determined that the vehicle speed SP is equal to or higher than the determination vehicle speed SS (step S10: NO), the opening / closing control unit 81 ends the refueling process. On the other hand, when the opening / closing control unit 81 determines that the vehicle speed SP is less than the determination vehicle speed SS (step S10: YES), the process proceeds to step S20.

  In step S20, the opening / closing control unit 81 of the control device 80 determines whether or not the internal pressure Ps of the fuel tank 31 detected by the internal pressure sensor 35 is equal to or less than a predetermined value Pt. When the opening / closing control unit 81 determines that the internal pressure Ps of the fuel tank 31 is equal to or less than the predetermined value Pt (step S20: YES), the process proceeds to step S30. In addition, as a situation where it is determined in step S20 that the internal pressure Ps of the fuel tank 31 is equal to or less than the predetermined value Pt, for example, processing from opening to closing of the closing valve 60 in the preparation processing described later is completed. The situation is possible.

  In step S30, the lid control unit 84 of the control device 80 outputs a signal for releasing the lock of the lid door 90 (releases the lock of the lid door 90). As a result, the lid door 90 is opened. In step S40, which is a subsequent process, the opening / closing control unit 81 opens the block valve 60. In addition, since the blocking valve 60 is opened in step S40, when the fueling operation is performed by the user thereafter, the fuel tank 31 is adjusted in accordance with the gradual decrease in the space volume in the fuel tank 31. The gas inside flows out of the fuel tank 31 through the vapor passage 51 and the atmospheric passage 53. At that time, the evaporated fuel is collected in the canister 52 located between the vapor passage 51 and the atmospheric passage 53.

  On the other hand, when the open / close control unit 81 determines in step S20 that the internal pressure Ps of the fuel tank 31 is greater than the predetermined value Pt (step S20: NO), the process proceeds to step S130. In step S130, the opening / closing control unit 81 determines whether or not the blocking valve 60 is being opened. When it is determined that the closing valve 60 is being opened (step S130: YES), the opening / closing control unit 81 advances the process to step S140. In addition, as a situation where it is determined in step S130 that the closing valve 60 is being opened, after the closing valve 60 is opened in the preparation process described later, before the closing valve 60 is closed in the preparation process. It is conceivable that the preparation process is interrupted.

  In step S140, the opening / closing control unit 81 determines whether or not the internal pressure Ps of the fuel tank 31 detected by the internal pressure sensor 35 is equal to or less than a predetermined value Pt. When the internal pressure Ps of the fuel tank 31 is greater than the predetermined value Pt (step S140: NO), the opening / closing control unit 81 executes the process of step S140 again. That is, the open / close control unit 81 waits for the internal pressure Ps of the fuel tank 31 to become equal to or less than the predetermined value Pt. If the opening / closing control unit 81 determines in step S140 that the internal pressure Ps of the fuel tank 31 is equal to or less than the predetermined value Pt (step S140: YES), the process proceeds to step S150. In step S150, the lid control unit 84 of the control device 80 releases the lock of the lid door 90. As a result, the lid door 90 is opened.

  On the other hand, when it is determined in step S130 that the closing valve 60 is closed (step S130: NO), the opening / closing control unit 81 advances the process to step S135. As a situation where it is determined in step S130 that the closing valve 60 is closed, a situation where the opening of the closing valve 60 in the preparation process described later is not executed is conceivable. In this case, the opening / closing control unit 81 advances the process to step S140 after opening the blocking valve 60 in step S135.

  After the process of step S40 or step S150, the control device 80 advances the process to step S50. In step S50, the lid control unit 84 of the control device 80 determines whether or not the signal input by the lid sensor 94 is an open position signal. If the signal is an open position signal (step S50: YES), the lid controller 84 advances the process to step S70. On the other hand, when the signal is a signal at the closed position (step S50: NO), the lid control unit 84 advances the process to step S60. In this case, the lid control unit 84 turns on a failure lamp for notifying the user of the failure of the lid sensor 94 in step S60, and then advances the process to step S70.

  In step S70, the opening / closing control unit 81 of the control device 80 determines whether or not the user's refueling operation has been completed. The opening / closing control unit 81 determines that the refueling operation by the user has ended when any one of the following three end conditions is satisfied. One of the end conditions is that when an open position signal is detected in step S50, the elapsed time after the signal is changed to the closed position is equal to or longer than the first end determination time (for example, 5 seconds). That is. Another one of the end conditions is that the elapsed time after the closing valve 60 is opened at the latest timing of the process of step S70 is equal to or longer than the second end determination time (for example, 30 minutes). Another one of the end conditions is that the vehicle traveled at a vehicle speed SP equal to or higher than a specified vehicle speed (for example, 50 km / h) for a determination distance (for example, 1 km). When it is determined that the user's refueling operation has not ended (step S70: NO), the opening / closing control unit 81 executes the process of step S70 again. That is, the open / close control unit 81 waits for any one of the above end conditions to be satisfied. When it is determined that the user has finished refueling work (step S70: YES), the opening / closing control unit 81 proceeds to step S80.

  In step S80, the opening / closing control unit 81 closes the blocking valve 60. Then, the open / close control unit 81 advances the process to step S90. In step S90, the lid control unit 84 of the control device 80 determines whether or not the signal input by the lid sensor 94 is a closed position signal. When the signal is a signal at the closed position (step S90: YES), the lid control unit 84 ends the series of processes. On the other hand, if the signal is an open position signal (step S90: NO), the lid controller 84 proceeds to step S100.

  In step S100, the lid control unit 84 determines whether or not the elapsed time after the closing valve 60 is closed in step S80 is equal to or longer than a predetermined closing waiting time (for example, 5 minutes). When the elapsed time is less than the closing waiting time (step S100: NO), the lid control unit 84 returns to the process of step S90. The lid controller 84 repeats the determinations in steps S90 and S100 until the elapsed time reaches the closing waiting time. If the elapsed time reaches the closing waiting time without the determination in step S90 being YES (step S100: YES), the lid controller 84 advances the process to step S110. In step S110, the lid control unit 84 turns on the warning lamp. Thereafter, the lid control unit 84 ends the series of processes.

  When the user who notices that the warning lamp is turned on closes the lid door 90 and the signal of the lid sensor 94 becomes a signal of the closed position, the warning lamp is turned off. If the warning lamp does not turn off even when the user closes the lid door 90, the lid sensor 94 is suspected of malfunctioning. In this case, the user may determine that the lid sensor 94 is out of order.

  Next, the flow of the preparation process will be described with reference to FIG. This preparation process is repeatedly executed on condition that the above-described refueling process is not being executed in a state where the system start switch (also referred to as an ignition switch or a main switch) of the hybrid system is turned on. Is done.

  When the preparation process is started, the control device 80 advances the process to step S210. In step S210, position specifying unit 86 of control device 80 determines whether or not information on the current position of the host vehicle has been acquired. If it is determined that the current position information of the host vehicle has not been acquired (step S210: NO), the position specifying unit 86 executes the process of step S210 again. That is, the position specifying unit 86 waits until information on the current position of the host vehicle is acquired. For example, when the GPS antenna 74 cannot receive the GPS signal G, the determination in step S210 is NO. If the position specifying unit 86 acquires information on the current position of the host vehicle (step S210: YES), the position specifying unit 86 advances the process to step S220.

  In step S220, the position specifying unit 86 calculates a distance D from the current position of the own vehicle to the fuel supply facility based on the map data and the information on the current position of the own vehicle. Then, the position specifying unit 86 determines whether or not the calculated distance D is equal to or less than the predetermined distance Z. That is, the position specifying unit 86 determines whether or not the fuel supply facility exists within a range of the predetermined distance Z or less from the current position of the own vehicle. When the position specifying unit 86 determines that the calculated distance D is greater than the predetermined distance Z, that is, when it is determined that there is no fuel supply facility within the predetermined distance Z from the current position of the vehicle. (Step S220: NO), the process returns to Step S210. On the other hand, if the position specifying unit 86 determines that the calculated distance D is equal to or less than the predetermined distance Z (step S220: YES), that is, the fuel supply facility is within the predetermined distance Z from the current position of the vehicle. If it is determined that it exists, the process proceeds to step S230.

  In step S <b> 230, the opening / closing control unit 81 of the control device 80 executes a decompression process for opening the block valve 60. Thereafter, the opening / closing control unit 81 advances the process to step S240. In step S240, the opening / closing control unit 81 determines whether or not the internal pressure Ps of the fuel tank 31 detected by the internal pressure sensor 35 is equal to or less than a predetermined value Pt. When the internal pressure Ps of the fuel tank 31 is larger than the predetermined value Pt (step S240: NO), the opening / closing control unit 81 executes the process of step S240 again. That is, the open / close control unit 81 waits for the internal pressure Ps of the fuel tank 31 to become equal to or less than the predetermined value Pt. When it is determined in step S240 that the internal pressure Ps of the fuel tank 31 is equal to or less than the predetermined value Pt (step S240: YES), the opening / closing control unit 81 proceeds to step S250.

  In step S250, the opening / closing control unit 81 closes the block valve 60. Then, the open / close control unit 81 finishes a series of processes and returns to the start. Then, the control device 80 repeats the preparation process until the system activation switch of the hybrid system is turned off.

  In addition, when the fuel supply process is started during the execution of the preparation process, the control device 80 forcibly ends the preparation process at that time. And the control apparatus 80 performs a preparation process from the start again at the time of completion | finish of a fuel supply process.

Next, the operation and effect of this embodiment will be described.
At the time of refueling, it is necessary to cause the gas in the fuel tank 31 to flow out of the fuel tank 31 through the vapor passage 51 and the atmospheric passage 53 as the space volume in the fuel tank 31 gradually decreases. When the gas in the fuel tank 31 passes through the canister 52, the evaporated fuel contained in the gas is collected by the adsorbent of the canister 52. Therefore, in the adsorbent of the canister 52, it is necessary to ensure the remaining capacity of the adsorption amount of the evaporated fuel at the time of refueling. In particular, the hybrid vehicle has more opportunities to stop the operation of the internal combustion engine 100 than the vehicle using only the internal combustion engine 100 as a drive source. Therefore, the opportunity to open the purge control valve 65 is reduced, and as a result, the opportunity to cause the evaporated fuel to desorb from the adsorbent of the canister 52 and to combust the evaporated fuel is reduced. Due to these circumstances, in the present embodiment, the blocking valve 60 is used for a period as long as possible, including when the internal combustion engine 100 is stopped or when the purge control valve 65 is closed while the internal combustion engine 100 is in operation. Is closed. In this way, the fuel tank 31 is sealed for as long as possible so that the remaining capacity of the adsorbed amount of the evaporated fuel in the adsorbent of the canister 52 can be secured in preparation for refueling.

  On the other hand, when the period for sealing the fuel tank 31 becomes longer, the internal pressure Ps of the fuel tank 31 may become larger than the atmospheric pressure. Therefore, when the user refuels the fuel tank 31, the internal pressure Ps of the fuel tank 31 may be excessively greater than the atmospheric pressure. If the fuel filler 33 is opened while the internal pressure Ps of the fuel tank 31 is greater than the atmospheric pressure, the evaporated fuel is discharged from the fuel tank 31 to the atmosphere through the fuel filler 33 when the user performs a fueling operation. It is not preferable. Therefore, when the lid control unit 84 of the control device 80 in the present embodiment receives the input signal W from the lid switch 98 operated by the user, the internal pressure Ps of the fuel tank 31 is not more than the predetermined value Pt. The lid door 90 is unlocked on the condition that the decompression process has been executed. That is, the lock of the lid door 90 is not released while the internal pressure Ps of the fuel tank 31 is high. When the lid door 90 is unlocked and the user can access the fuel filler 33, the inside of the fuel tank 31 is sufficiently decompressed. Therefore, when the user performs a refueling operation, the amount of evaporated fuel discharged to the atmosphere through the refueling port 33 is very small.

  By the way, depending on the internal pressure Ps of the fuel tank 31, it may take a relatively long time until the internal pressure Ps of the fuel tank 31 becomes equal to or lower than the predetermined value Pt after the closing valve 60 is opened. In this case, there is a waiting time for the internal pressure Ps of the fuel tank 31 to decrease from when the user operates the lid switch 98 until the lid control unit 84 of the control device 80 unlocks the lid door 90. . For example, when the internal pressure Ps of the fuel tank 31 is excessively high, the above-described waiting time becomes long, so that it takes a certain amount of time before refueling becomes possible.

  Specifically, in the above embodiment, the opening / closing control unit 81 of the control device 80 appropriately opens the closing valve 60 when the internal combustion engine 100 is in operation and the purge control valve 65 is opened. However, for example, the state where the purge condition is not satisfied continues for a long period of time, or immediately after the system start switch of the hybrid system is turned on and before the purge condition is satisfied, the vehicle reaches the fuel supply facility. In such a case, the opening / closing control unit 81 cannot execute the opening of the blocking valve 60, and the internal pressure Ps of the fuel tank 31 can be increased.

  In this embodiment, when the position specifying unit 86 of the control device 80 can acquire information on the current position of the host vehicle, the opening / closing control unit 81 of the control device 80 is within a predetermined distance Z from the current position of the host vehicle. When it is detected that the fuel supply facility exists (when the distance D from the current position of the vehicle to the fuel supply facility becomes equal to or less than the predetermined distance Z), the block valve 60 is opened. Therefore, when the vehicle reaches the fuel supply facility and the vehicle is stopped, decompression in the fuel tank 31 has already started. Therefore, when the user operates the lid switch 98, the internal pressure Ps of the fuel tank 31 is less than or equal to the predetermined value Pt, or the internal pressure Ps is likely to reach a value relatively close to the predetermined value Pt. . Therefore, the time from when the user operates the lid switch 98 until the lid door 90 is unlocked is very short. Therefore, the user can move to the refueling operation with almost no waiting time after operating the lid switch 98.

  Even when the vehicle reaches the fuel supply facility, refueling may not be performed. In some cases, the vehicle is brought to the vicinity of the fuel supply facility, but eventually the fuel supply facility is not stopped. In such a case, if it is detected that there is a fuel supply facility within a predetermined distance Z from the current position of the vehicle and the blockade valve 60 is opened, the fuel tank will continue to open. The evaporated fuel continues to flow into the canister 52 from the inside 31, and the remaining capacity of the adsorbed amount of the evaporated fuel in the adsorbent of the canister 52 decreases. In this regard, in the present embodiment, the blocking valve 60 is closed when the internal pressure Ps of the fuel tank 31 decreases to a predetermined value Pt or less. Therefore, it is possible to suppress a decrease in the remaining capacity of the evaporated fuel adsorption amount in the adsorbent of the canister 52.

  In the present embodiment, the lid door 90 is locked on condition that the internal pressure Ps of the fuel tank 31 is reduced to a predetermined value Pt or less and that the vehicle speed of the host vehicle is less than the determination vehicle speed SS. To release. Therefore, the lid door 90 is not inadvertently unlocked when the vehicle speed is high.

In addition, this embodiment can be implemented with the following modifications. The present embodiment and the following modifications can be implemented in combination with each other within a technically consistent range.
The magnitude of the predetermined value Pt used for comparison with the internal pressure Ps of the fuel tank 31 in step S240 of the preparation process or in steps S20 and S140 of the fuel supply process may be larger than a value near atmospheric pressure. Even in this case, the pressure in the fuel tank 31 can be reduced.

  As a method for determining that the internal pressure Ps of the fuel tank 31 has become equal to or less than the predetermined value Pt in step S240 of the preparation process, for example, the elapsed time after opening the closing valve 60 in step S230 is adopted. Good. Specifically, the internal pressure Ps of the fuel tank 31 becomes equal to or less than a predetermined value Pt when the elapsed time since the closing valve 60 is opened in step S230 exceeds a predetermined valve closing determination time. It may be determined that The valve closing determination time may be determined based on the volume of the fuel tank 31 and the like. In step S20 and step S140 of the refueling process, the elapsed time after opening the closing valve 60 may be adopted in the same manner as described above.

  -The magnitude | size of the predetermined distance Z utilized by determination of step S220 of a preparation process can be changed suitably. The predetermined distance Z only needs to be large enough to determine that the vehicle has reached the vicinity of the fuel supply facility.

  -The conditions for starting the refueling process may be changed. As a condition for starting the refueling process, for example, a condition in which the distance D from the current position of the vehicle to the fuel supply facility is close to 0 and the vehicle is stopped may be employed. In this case, the user may operate the lid switch 98 after the refueling process is started.

  -The magnitude | size of the determination vehicle speed SS utilized by the process of step S10 of an oil supply process can be changed suitably. The determination vehicle speed SS only needs to be large enough to determine that the vehicle has stopped or that the vehicle is likely to stop.

  The end condition used in the process of step S70 of the oil supply process can be changed as appropriate. The end condition may be any as long as it can be determined that the refueling operation by the user has ended. For example, the first determination time or the second determination time may be changed. Further, instead of or in addition to the termination condition of the above embodiment, other conditions may be adopted. For example, when the elapsed time since the lid switch 98 is operated exceeds a predetermined specified time, it may be determined that the refueling operation by the user is completed. In the determination of step S70, it may be determined that the refueling operation has ended when all of the plurality of end conditions are satisfied or when some of the plurality of end conditions are satisfied together. .

  -It is not necessary to light a failure lamp in step S60 of refueling processing. Instead, for example, information indicating that the lid sensor 94 has failed may be stored in the nonvolatile ROM. In this case, the information can be read out at a maintenance factory or the like. The same applies to the warning lamp in step S110 of the refueling process.

  -The length of the closing waiting time used in the process of step S100 of the refueling process can be changed as appropriate. The closing waiting time only needs to be long enough to determine whether the lid door 90 has been forgotten to be closed or the lid sensor 94 has failed.

  The biasing means may be eliminated in the door opening / closing mechanism 92. And after releasing the lock | rock of the lid door 90 by step S30 and step S150 of an oil supply process, you may open the lid door 90 manually, for example.

  -While the purge control valve 65 is open, the specified value used for the determination when the opening / closing control unit 81 opens the block valve 60 may be larger than the value near atmospheric pressure. Even in this case, the inside of the fuel tank 31 can be reduced in pressure while the purge control valve 65 is opened.

  -If the shutoff valve 60 is opened while the purge control valve 65 is open, then when the shutoff valve 60 is closed, the shutoff valve 60 is closed based on the elapsed time since the shutoff valve 60 was opened. You may speak.

  -While the purge control valve 65 is open, the closing and closing of the block valve 60 may be alternately repeated at predetermined time intervals. In this way, the opening and closing of the blocking valve 60 is controlled during the opening of the purge control valve 65, and further, the elapsed time is set in step S240 of the preparatory process and in steps S20 and S140 of the refueling process as in the above modified example. When making the determination based on the internal pressure sensor 35, the internal pressure sensor 35 may be eliminated.

  The position specifying unit 86 may be an in-vehicle device that is different from the control device 80 and includes a computer including a CPU, a ROM, a RAM, and the like. The position specifying unit 86 only needs to acquire the current position information of the own vehicle by converting the GPS signal G into the current position information of the own vehicle. The position specifying unit 86 stores map data describing the position information of the fuel supply facility, and supplies fuel from the current position of the own vehicle based on the map data and information on the current position of the own vehicle. It suffices if the distance D to the facility can be calculated.

In addition to the control device 80, a control device that controls the operation of each part other than the evaporated fuel processing device 50 in the internal combustion engine 100 may be provided.
The evaporated fuel processing device 50 may be applied to an internal combustion engine of a vehicle that uses only the internal combustion engine as a drive source.

  -The evaporative fuel processing apparatus 50 in the said embodiment is illustrated schematically only to the last, and the structure of the said evaporative fuel processing apparatus 50 can be changed suitably. For example, a valve member that opens and closes the flow path of the atmospheric passage 53 may be provided midway in the extending direction of the atmospheric passage 53. For example, the opening / closing controller 81 may control the opening / closing of the valve member. Further, a pump for accelerating the introduction of the evaporated fuel into the intake passage 11 may be provided midway in the extending direction of the purge passage 55. For example, the operation of the pump may be controlled by the open / close control unit 81.

DESCRIPTION OF SYMBOLS 31 ... Fuel tank, 33 ... Refueling port, 35 ... Internal pressure sensor, 50 ... Evaporative fuel processing apparatus, 51 ... Vapor passage, 52 ... Canister, 60 ... Sealing valve, 81 ... Opening / closing control part, 84 ... Lid control part, 86 ... Position specifying unit, 90 ... lid door, 98 ... lid switch, 100 ... internal combustion engine.

Claims (3)

A vapor passage having one end communicating with the inside of the fuel tank, a canister for adsorbing and collecting evaporated fuel generated in the fuel tank, connected to the other end of the vapor passage, and the vapor passage An evaporative fuel processing device provided in the middle, comprising a block valve that opens and closes the flow path of the vapor passage, and an open / close control unit that controls opening and closing of the block valve,
The lid control unit that unlocks the lid door that covers the fuel filler for refueling the fuel tank, and map data that describes the position information of the fuel supply facility are stored, and information on the current position of the vehicle And a position specifying unit for acquiring
When the lid control unit receives an input signal from a lid switch operated by a user when opening the lid door, the internal pressure of the fuel tank is reduced to a predetermined value or less. To unlock the lid door,
The position specifying unit calculates a distance from the current position of the host vehicle to the fuel supply facility based on the map data and information on the current position of the host vehicle.
The evaporative fuel processing device, wherein when the fuel supply facility exists within a predetermined distance or less from the current position of the host vehicle, the open / close control unit performs a decompression process to open the block valve. The lid control unit unlocks the lid door on the condition that the internal pressure of the fuel tank is reduced to a predetermined value or less and the vehicle speed of the host vehicle is lower than a determination vehicle speed. Item 2. The fuel vapor processing apparatus according to Item 1. 3. The evaporated fuel according to claim 1, wherein the open / close control unit closes the block valve when the internal pressure of the fuel tank decreases to a predetermined value or less after execution of the decompression process. Processing equipment.