JP2005016406A - Control device for closed fuel tank system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for a closed fuel tank system capable of accurately determining whether or not oiling is performed. <P>SOLUTION: This control device for the closed fuel tank system is applied to the closed fuel tank system provided with a pressure resistant tank 31 storing fuel, a canister 51 adsorbing vaporized fuel inside the pressure resistant tank 31, a vapor passage 52 connecting the pressure resistant tank 31 with the canister 51 and a seal valve 53 selectively opening/closing the vapor passage 52. Basically, a closed state of the pressure resistant tank 31 is secured through closing of the seal valve 53, and the seal valve 53 is opened along with start of oiling work. After start of the oiling work, the seal valve 53 is temporarily closed, and whether or not oiling is performed is determined based on pressure change inside the pressure resistant tank 31 in accordance with the closing operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for a sealed fuel tank system that performs control related to refueling a sealed fuel tank.
[0002]
[Prior art]
In general, a vehicle that supplies volatile fuel such as gasoline to an engine is equipped with a sealed fuel tank system for the purpose of avoiding leakage of vaporized fuel (vapor) into the atmosphere.
[0003]
This sealed fuel tank system generally includes a fuel tank that stores fuel in a sealed state, and a vapor processing device that discharges (purges) vapor generated in the fuel tank to the intake passage of the engine.
[0004]
As a vapor processing apparatus, a canister system having a control valve for switching opening / closing of the passage to a vapor passage connecting the fuel tank and the canister is widely used.
[0005]
In the sealed fuel tank system having such a configuration, basically, while maintaining the control valve in the closed state to ensure the sealed state of the fuel tank, the pressure in the fuel tank (tank pressure) is equal to or higher than a predetermined value. Is detected, the control valve is opened to allow the air containing vapor to flow out of the fuel tank.
[0006]
In order to avoid an excessive increase in tank pressure during refueling, the control valve is opened prior to refueling.
Therefore, in the conventional sealed fuel tank system, in order to close the control valve after completion of refueling, processing for determining completion of refueling is performed.
[0007]
As a sealed fuel tank system that performs such determination processing, for example, an apparatus described in Patent Document 1 is known.
The device opens the control valve when it is determined that refueling has started, and then completes refueling based on the change in the pressure in the fuel tank detected through the sensor exceeding a predetermined determination value. Judgment is made.
[0008]
In addition, as a prior art document concerning this invention, the patent document 2 shown below other than the said patent document 1 is mentioned.
[0009]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-13808
[Patent Document 2]
JP 2001-206081 A
[0010]
[Problems to be solved by the invention]
By the way, when the control valve is in the valve open state, the detected change value of the tank pressure shows a relatively slow fluctuation tendency. On the other hand, the predetermined determination value used when determining the completion of refueling must be set to a larger value including excess in consideration of disturbance and noise.
[0011]
For these reasons, there is a concern about the following when the refueling completion determination is performed in the manner described in Patent Document 1.
That is, it is difficult to obtain sufficient determination accuracy because the determination of the completion of refueling is performed based on the comparison between the change value of the slowly changing tank pressure and a predetermined determination value set large in advance.
[0012]
The present invention has been made in view of such circumstances, and an object thereof is to provide a control device for a sealed fuel tank system that can accurately determine whether or not refueling is being performed. .
[0013]
[Means for Solving the Problems]
In the following, means for achieving the above object and its effects are described.
According to a first aspect of the present invention, a fuel tank that stores fuel, a canister that adsorbs vaporized fuel in the fuel tank, a vapor passage that connects the fuel tank and the canister, and the vapor passage are selectively used. Applied to a sealed fuel tank system having a control valve that opens and closes, and ensures the sealed state of the fuel tank through the closing of the control valve, while the sealed valve opens the control valve with the start of refueling work In the control device of the fuel tank system, whether the control valve is temporarily closed after the refueling operation is started, and refueling is performed based on the pressure change in the fuel tank according to the valve closing operation. The gist is that a control means for determining whether or not is provided.
[0014]
According to the above configuration, after the refueling operation is started, the control valve is temporarily closed, and whether or not refueling is performed based on the pressure change in the fuel tank according to the valve closing operation. Is determined. By the way, when the control valve is closed during refueling (when the fuel is being supplied into the fuel tank), the gas containing vapor is sent to the canister by sealing the fuel tank. Since it is not released, the pressure in the fuel tank rises in response to the closing operation of the control valve. On the other hand, when refueling is stopped (when fuel is not being supplied into the fuel tank), the pressure in the fuel tank and the pressure in the canister are in an almost equilibrium state. Even if the valve closing operation is performed, the pressure in the fuel tank is not affected by the valve closing operation (or the influence degree of the valve closing operation is extremely small compared to that during refueling). Thus, since the change in pressure in the fuel tank due to the closing operation of the control valve is greatly different between the time of refueling and the stop of refueling, based on the pressure change in the fuel tank according to the closing operation of the control valve, By determining whether or not refueling is being performed, the determination can be performed accurately.
[0015]
According to a second aspect of the present invention, there is provided the control device for the sealed fuel tank system according to the first aspect, wherein the control means supplies fuel based on the fact that the amount of increase in pressure in the fuel tank is less than a predetermined amount of increase. The gist is to determine that is not performed.
[0016]
According to the above configuration, it is determined that the fuel supply is not performed based on the increase in the pressure in the fuel tank being less than the predetermined increase. The predetermined increase amount is set sufficiently larger than the increase amount of the pressure in the fuel tank when the control valve closing operation is performed while the fuel supply is stopped. As a result, it is possible to more accurately determine whether or not refueling is being performed based on the pressure change in the fuel tank in response to the valve closing operation of the control valve.
[0017]
The gist of a third aspect of the present invention is that in the control device for the sealed fuel tank system according to the first or second aspect, the control means performs the valve closing operation of the control valve every predetermined execution period.
[0018]
According to the said structure, operation which closes a control valve temporarily is performed for every predetermined | prescribed execution period. Thereby, since the change of the pressure in the fuel tank according to the valve closing operation of the control valve is periodically detected, a more accurate determination result can be obtained.
[0019]
According to a fourth aspect of the present invention, in the control device for a sealed fuel tank system according to the third aspect, the control means is configured to control the control valve when the elapsed time from the start of the fueling operation becomes a predetermined time or more. The gist is to start the valve closing operation.
[0020]
According to the above configuration, when the elapsed time from the start of the refueling operation becomes a predetermined time or more, the valve closing operation of the control valve is started. Note that the predetermined time is set to a time corresponding to a state in which refueling is performed to some extent. As a result, the number of executions of the control valve closing operation can be minimized.
[0021]
According to a fifth aspect of the present invention, in the control device for the sealed fuel tank system according to the fourth aspect, the control means is configured to perform the predetermined time according to a remaining amount of fuel in the fuel tank at the start of the fueling operation. The gist is to variably set.
[0022]
According to the above configuration, the predetermined time is variably set according to the remaining amount of fuel in the fuel tank at the start of the refueling operation. By adopting such a configuration, it becomes possible to start the valve closing operation of the control valve when it is close to the time when the fuel supply is stopped, so that the number of executions of the valve closing operation can be reduced.
[0023]
According to a sixth aspect of the present invention, in the control device for a sealed fuel tank system according to any one of the third to fifth aspects, the control means is configured to perform the predetermined operation according to an elapsed time after the fueling operation is started. The gist is to variably set the execution period.
[0024]
According to the above configuration, the predetermined execution period is variably set according to the elapsed time after the refueling operation is started. By adopting such a configuration, it is possible to set the execution interval of the valve closing operation of the control valve according to the possibility that the refueling is stopped, so that the number of executions of the valve closing operation can be reduced. become able to.
[0025]
A seventh aspect of the present invention is the control apparatus for a sealed fuel tank system according to any one of the first to sixth aspects, wherein the control means closes the control valve after determining that no fuel is being supplied. The gist is to maintain the valve state.
[0026]
According to the above configuration, the control valve is maintained in the closed state after it is determined that the fuel supply is not performed. As a result, the control valve can be quickly closed when refueling is stopped.
[0027]
According to an eighth aspect of the present invention, in the control device for a sealed fuel tank system according to any one of the first to seventh aspects, the period for temporarily closing the control valve is obstructed to the refueling work by the valve closing operation. The gist is that the period was set so as not to cause any problems.
[0028]
According to the above configuration, the period for temporarily closing the control valve is set to a period that does not hinder the refueling operation (a period that does not cause unnecessary refueling stop or fuel blowback). Thereby, it becomes possible to determine whether or not refueling is being performed while maintaining a suitable refueling state.
[0029]
A ninth aspect of the present invention is the control apparatus for a sealed fuel tank system according to any one of the first to eighth aspects, wherein the control means determines that refueling is not being performed and completes the refueling operation. Until then, the gist is to determine whether or not refueling has been resumed based on the pressure change in the fuel tank.
[0030]
According to the above configuration, it is determined whether or not refueling has been resumed based on the pressure change in the fuel tank from when it is determined that refueling is not performed until the refueling operation is completed. By adopting such a configuration, it becomes possible to reduce the pressure in the fuel tank through the opening of the control valve when refueling is resumed, so that refueling can be suitably continued.
[0031]
According to a tenth aspect of the present invention, in the control device for a sealed fuel tank system according to the ninth aspect, the control means temporarily closes the control valve after determining that refueling has been resumed. The gist is to determine whether or not refueling is being performed based on a change in pressure in the fuel tank in response to a valve closing operation.
[0032]
According to the above configuration, after the resumption of refueling is determined, whether the control valve is temporarily closed and whether refueling is performed based on the pressure change in the fuel tank according to the valve closing operation. It is determined whether or not. Thereby, it becomes possible to accurately determine whether or not refueling is performed after resumption of refueling.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.
[0034]
FIG. 1 schematically shows the configuration of a vehicle equipped with a sealed fuel tank system.
The vehicle according to the present embodiment includes the following elements [a] to [d].
[A] An engine 1 that generates power through combustion of an air-fuel mixture.
[B] A fuel supply device 3 for supplying fuel to the engine 1.
[C] A vapor processing device 5 for discharging (purging) the evaporated fuel (vapor) generated in the fuel supply device 3 into the intake passage of the engine 1.
[D] An electronic control unit (ECU) 7 that comprehensively controls the vehicle including the engine 1, the fuel supply device 3, and the vapor processing device 5.
[0035]
[Engine configuration]
Each element constituting the engine 1 will be described.
The engine body 11 burns a mixture of fuel and air.
[0036]
The intake passage 12 supplies outside air to the engine body 11.
The throttle valve 13 adjusts the amount of air supplied to the engine body 11 according to the opening.
[0037]
The air cleaner 14 removes foreign matter in the air sucked into the intake passage 12.
[Configuration of fuel supply system]
Each element constituting the fuel supply device 3 will be described.
[0038]
The pressure tank 31 stores fuel in a sealed state.
The fuel pump 32 pressurizes and sends the fuel in the pressure tank 31 to the engine body 11.
[0039]
The fuel supply passage 33 distributes the fuel pumped by the fuel pump 32 to the engine body 11.
The oil supply pipe 34 connects the pressure tank 31 and the fuel inlet box 35, and has an oil supply port 36 at the end on the fuel inlet box 35 side.
[0040]
The communication pipe 34 a connects the pressure tank 31 and the fuel filler 36.
The fuel inlet box 35 has a lid 37 for opening / closing the fuel filler opening 36 with respect to the outside of the vehicle.
[0041]
The lid 37 is driven to open and close through a lid actuator 39.
The fuel filler cap 38 is attached to the fuel filler 36 to close the fuel filler 36.
[0042]
The lid actuator 39 is driven according to the operation of the lid switch 40.
The lid switch 40 can be switched “ON / OFF” through the operation of the driver or the like.
[0043]
The ECU 7 opens the lid 37 through the control of the lid actuator 39 when the lid switch 40 is switched “ON”, while the lid through the control of the lid actuator 39 when the lid switch 40 is switched “OFF”. 37 is closed.
[0044]
[Configuration of vapor processing equipment]
Each element which comprises the vapor processing apparatus 5 is demonstrated.
The canister 51 has an adsorbent (e.g., activated carbon) inside, and temporarily collects vapor by adsorbing the evaporated fuel (vapor) generated in the pressure tank 31 to the adsorbent.
[0045]
The vapor passage 52 connects the upper part of the pressure-resistant tank 31 and the canister 51 and includes a blocking valve 53 on the passage.
The blocking valve 53 selectively switches opening / closing of the vapor passage 52. As the blocking valve 53, an electromagnetic valve configured to open when energized and close when deenergized is employed. Further, the closing valve 53 is controlled through the ECU 7 and is basically maintained in a closed (non-energized) state.
[0046]
The outside air introduction passage 54 connects the canister 51 and the fuel inlet box 35 (in the atmosphere) and includes an outside air control valve 55 on the passage.
The outside air control valve 55 selectively switches open / close of the outside air introduction passage 54. As the outside air control valve 55, an electromagnetic valve that can be controlled to open and close through the ECU 7 is employed.
[0047]
The purge passage 56 connects the canister 51 and the intake passage 12 and includes a purge control valve 57 on the passage.
The purge control valve 57 selectively switches opening / closing of the purge passage 56. As the purge control valve 57, an electromagnetic valve that can be controlled to open and close through the ECU 7 is employed.
[0048]
The sealed fuel tank system of the present embodiment includes a pressure tank 31, a vapor processing device 5, and an electronic control device 7. Further, the control means includes an electronic control device 7.
[0049]
[Configuration of detection system]
Each sensor constituting the vehicle detection system will be described. Data detected through the following sensors is input to the ECU 7.
[0050]
The engine water temperature sensor S1 detects the temperature of the cooling water of the engine body 11 (engine water temperature THw).
The tank pressure sensor S2 detects the pressure in the pressure tank 31 (tank pressure Pt).
[0051]
[Purging mode of vapor processing apparatus]
A vapor processing mode by the vapor processing apparatus 5 will be described.
When the tank pressure Pt becomes equal to or higher than a predetermined pressure due to the vaporization of the fuel in the pressure tank 31, the closing valve 53 is opened.
[0052]
As a result, the air containing the vapor in the pressure tank 31 flows into the canister 51 through the vapor passage 52.
The vapor flowing into the canister 51 is collected in the canister 51 by the adsorbent.
[0053]
When a predetermined condition (for example, the engine water temperature THw is equal to or higher than the predetermined temperature) is satisfied after the inflow of air including vapor into the canister 51, the purge control valve 57 is opened.
[0054]
As a result, the air containing the vapor in the canister 51 is purged into the intake passage 12 through the purge passage 56 through the negative pressure in the intake passage 12.
Further, the outside air control valve 55 is opened during the purge.
[0055]
As a result, outside air flows into the canister 51 through the outside air introduction passage 54.
The vapor adsorbed in the canister 51 is purged to the intake passage 12 together with the inflowing outside air.
[0056]
[Fueling aspect of sealed fuel tank system]
A basic fueling mode in the sealed fuel tank system will be described.
When the lid switch 40 is switched to “ON” at the time of refueling, the lid 37 is opened according to this, and the blocking valve 53 is maintained in the open state. By opening the block valve 53, an excessive increase in tank pressure during refueling is avoided.
[0057]
After the lid 37 is opened, refueling is started after the filler cap 38 is removed through the operator.
In this way, in the sealed fuel tank system, the sealing valve 53 is maintained in the open state after the refueling operation is started. Therefore, when refueling is stopped, the sealing valve 53 is closed and the pressure tank 31 is closed. It is required to ensure a sealed state.
[0058]
Therefore, in the present embodiment, in consideration of the above, the fuel supply mode of the sealed fuel tank system is controlled through “fuel supply control” described below.
Here, prior to the description of “oil supply control”, a determination method for determining whether or not oil supply is being performed will be described.
[0059]
[Lubrication judgment method]
In the “oil supply control” of the present embodiment, after the oil supply operation is started, an operation of temporarily closing the closing valve 53 (closing the closing valve 53 for a predetermined minute period ΔTvc) is performed for a predetermined time. It is performed at intervals, and it is determined whether or not refueling is performed based on the change in the tank pressure Pt accompanying this valve closing operation.
[0060]
According to this determination mode, it is possible to accurately determine whether or not refueling is performed for the following reason.
When the closing valve 53 is closed during refueling (when fuel is being supplied to the pressure tank 31), the gas including vapor is sealed on the canister 51 side by sealing the pressure tank 31. Therefore, the tank pressure Pt rises in response to the closing operation of the blocking valve 53.
[0061]
An example of the variation tendency of the tank pressure Pt is shown in FIG.
As shown in FIG. 2 (a), during the refueling, the block valve 53 is closed over a predetermined minute period ΔTvc (time t21 to t22), so that the tank pressure Pt increases momentarily. become.
[0062]
On the other hand, when refueling is stopped (when fuel is not supplied to the pressure tank 31), the pressure in the pressure tank 31 and the pressure in the canister 51 are in an almost equilibrium state. Even when the valve 53 is closed, the tank pressure Pt is not affected by the valve closing operation (or the degree of influence of the valve closing operation of the block valve 53 is extremely small as compared to that during refueling. It will be a thing).
[0063]
An example of the variation tendency of the tank pressure Pt is shown in FIG.
As shown in FIG. 2B, the tank pressure Pt shows a substantially constant value even when the closing valve 53 is closed over a predetermined minute period ΔTvc (time t21 to t22) during refueling stop. (Or the degree of increase is very small compared to when refueling).
[0064]
As described above, the change in the tank pressure Pt due to the instantaneous closing of the closing valve 53 is greatly different between the time of refueling and the stop of the refueling. Therefore, based on the change of the tank pressure Pt according to the closing operation of the closing valve 53. Thus, the determination can be made accurately by determining whether or not refueling is being performed.
[0065]
Hereinafter, “oil supply control” that performs overall control related to oil supply to the pressure tank 31 including such an oil supply determination process will be described.
(Lubrication control)
This control is configured by the following processes [a] to [c] and is performed through the ECU 7.
[A] "Core refueling treatment" (Figure 3)
[B] “Refueling work start process” (FIG. 4)
[C] “Oil supply determination process” (FIG. 5)
The “oil supply control” will be described with reference to FIGS.
[0066]
This control is started when the conditions for performing the refueling operation are satisfied, and after the processes of the following steps S100 to S304 are performed, the control is temporarily ended. Note that the following conditions are adopted as conditions for refueling.
[A] The lid switch 40 is switched to “ON”.
[B] The vehicle is stopped.
[0067]
[Step S100] “Refueling work start processing” for starting the refueling work is executed.
[Step S101] The blocking valve 53 is opened.
[0068]
[Step S102] The lid 37 is opened.
After completing the process of step S102, the process returns to the “main oil supply process”.
[Step S200] It is determined whether or not the elapsed time (lid opening time Tro) after opening the lid 37 is equal to or longer than the predetermined opening time Trox (elapsed time after the refueling operation is started). It is determined whether or not this is the case). That is, the following conditions
Tro ≧ Trox
It is determined whether or not is satisfied.
[0069]
The predetermined opening time Trox is set as a time corresponding to the time when the fuel is supplied to the pressure tank 31 to some extent after the lid 37 is opened. Moreover, it is used as a preset value. The predetermined opening time Trox corresponds to a predetermined time.
[0070]
When the lid opening time Tro is less than the predetermined opening time Trox, the above determination process is executed every predetermined period.
When the lid opening time Tro is equal to or longer than the predetermined opening time Trox, the process proceeds to step S300.
[0071]
[Step S300] “Refueling determination processing” for determining whether or not refueling is being performed is executed.
[Step S301] The blocking valve 53 is instantaneously closed. That is, after closing the closing valve 53 for a predetermined minute period ΔTvc, the closing valve 53 is opened again.
[0072]
The predetermined minute period ΔTvc is set to an appropriate value within a range that does not impede refueling when the blocking valve 53 is closed over the minute period ΔTvc. The predetermined minute period ΔTvc is used as a preset value.
[0073]
[Step S302] It is determined whether or not the increase amount of the tank pressure Pt (tank pressure increase amount ΔPt) according to the closing operation of the blocking valve 53 is equal to or greater than a predetermined increase amount ΔPtx. That is, the following conditions
ΔPt ≧ ΔPtx
It is determined whether or not is satisfied. This determination process is performed based on the detection data of the tank pressure sensor S2.
[0074]
The predetermined increase amount ΔPtx is used as a threshold value for determining whether or not the tank pressure increase amount ΔPt corresponding to the closing operation of the blocking valve 53 corresponds to the pressure increase amount during refueling. Is set to be sufficiently larger than the tank pressure increase ΔPt corresponding to the closing operation of the blocking valve 53. Moreover, it is used as a preset value.
[0075]
When the tank pressure increase amount ΔPt is equal to or greater than the predetermined increase amount ΔPtx, it is determined that refueling is being performed. On the other hand, when the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPtx, refueling is performed. It is determined as an unbroken state.
[0076]
When the tank pressure increase amount ΔPt is equal to or greater than the predetermined increase amount ΔPtx, the process proceeds to step S303.
[Step S303] It is determined whether or not the valve opening period Tvo of the blocking valve 53 is equal to or longer than a predetermined valve opening period Tvox. That is, the following conditions
Tvo ≧ Tvox
It is determined whether or not is satisfied.
[0077]
The predetermined valve opening period Tvox corresponds to a time interval for performing an instantaneous valve closing operation of the block valve 53, and if the valve closing operation of the block valve 53 is performed at the same time interval, the fuel supply is hindered. It is set to an appropriate value within the range. Moreover, it is used as a preset value. The predetermined valve opening period Tvo corresponds to a predetermined execution period.
[0078]
When the valve opening period Tvo is less than the predetermined valve opening period Tvox, the above determination process is executed every predetermined period.
When the valve opening period Tvo is equal to or longer than the predetermined valve opening period Tvox, the process proceeds to step S301, and the processes after step S301 are executed again.
[0079]
When it is determined in step S302 that the tank pressure increase ΔPt is less than the predetermined increase ΔPtx, the process proceeds to step S304.
[0080]
[Step S304] The blocking valve 53 is closed.
After completing the process of step S304, the process returns to the “main oil supply process”. After returning, the “oil supply control” is terminated together with the “core oil supply process”.
[0081]
Thus, according to “oil supply control”, the closing valve 53 is instantaneously closed during refueling, and whether or not refueling is being performed based on the change in the tank pressure Pt according to this valve closing operation. Is determined.
[0082]
Next, the operational effects achieved through “oil supply control” will be described.
In this control, after the refueling operation is started, an operation for instantaneously closing the blocking valve 53 is performed at predetermined time intervals. Then, based on the fact that the tank pressure increase amount ΔPt corresponding to the valve closing operation is less than the predetermined increase amount ΔPtx, it is determined that no fuel is being supplied.
[0083]
In this way, it is determined whether or not refueling is performed based on the change in the tank pressure Pt that causes a clear difference between refueling and when refueling is stopped by opening and closing the sealing valve 53. A high determination result can be obtained.
[0084]
In this control, when it is detected that the refueling is stopped through the above processing, the block valve 53 is closed.
As a result, the amount of electric power consumed to open the closing valve 53 and the amount of vapor flowing into the canister 51 during the stoppage of refueling are reduced.
[0085]
Further, since the shutoff valve 53 is accurately closed while the refueling is stopped, fuel blowback from the fuel supply port 36 and unnecessary stoppage of fueling due to the closing of the shutoff valve 53 during the refueling can be avoided. It becomes like this.
[0086]
In this control, the closing valve 53 is instantaneously closed in the fuel supply determination process. Incidentally, when the closing valve 53 is closed during refueling, the gas in the pressure resistant tank 31 does not flow out to the canister 51 side, which may cause trouble in refueling due to an excessive increase in the tank pressure Pt. Conceivable. In this regard, when the closing operation of the blocking valve 53 is performed instantaneously, an excessive increase in the tank pressure Pt is avoided, so whether or not refueling is in progress without causing unnecessary refueling stop or fuel blow back. Is determined.
[0087]
In this control, when the elapsed time after opening the lid 37 becomes equal to or longer than the predetermined opening time Trox, an instantaneous valve closing operation of the blocking valve 53 is started.
Thereby, the valve closing operation of the blocking valve 53 performed until it is determined that the fuel supply is stopped is reduced as much as possible.
[0088]
Next, with reference to FIG. 6, an example of an oil supply mode by “oil supply control” will be described.
It is assumed that the condition for performing the refueling operation is satisfied at time t61 (FIG. 6: [a]). At this time, the following processing is performed.
[E] “Opening of the blocking valve 53”.
[C] “Open lid 37”.
[0089]
As a result, the gas containing the vapor staying in the pressure-resistant tank 31 flows out of the tank 31, so that the tank pressure Pt decreases.
It is assumed that fuel supply to the pressure tank 31 is started at time t62 (FIG. 6: [b]).
[0090]
At this time, the tank pressure Pt rises due to the inflow of fuel into the pressure tank 31.
Assume that at time t63, the elapsed time (lid opening time Tro) after opening the lid 37 reaches a predetermined time Trox (FIG. 6: [d]). At this time, the following processing is performed.
[E] “Momentary closing of the closing valve 53”.
[0091]
Thereby, since the pressure-resistant tank 31 is in a sealed state, the tank pressure Pt increases in accordance with the closing operation of the blocking valve 53. At this time, since refueling is performed, the tank pressure increase ΔPt is equal to or greater than a predetermined increase ΔPtx (FIG. 6: [b] [f]).
[0092]
After time t63, the closing operation of the closing valve 53 is performed every predetermined valve opening period Tvox until a state in which the tank pressure increase ΔPt is less than the predetermined increase ΔPtx is detected.
[0093]
It is assumed that refueling is stopped at time t64 (FIG. 6: [b]).
If it is detected at time t65 that the tank pressure increase ΔPt is less than the predetermined increase ΔPtx when the closing valve 53 is closed, the blocking valve 53 is closed accordingly. (FIG. 6: [e] [f]).
[0094]
As described above in detail, according to the control device for the sealed fuel tank system according to the first embodiment, the excellent effects listed below can be obtained.
(1) In the present embodiment, after the refueling operation is started, the closing operation of the blocking valve 53 is performed every predetermined valve opening period Tvo, and the tank pressure increase ΔPt corresponding to the valve closing operation is It is determined that refueling is not performed based on being less than the predetermined increase amount ΔPtx. This makes it possible to accurately determine whether or not refueling is being performed.
[0095]
(2) Further, when the refueling is stopped, the blocking valve 53 can be quickly closed.
(3) Further, it becomes possible to avoid fuel blowback and unnecessary refueling stop caused by closing the closing valve 53 during refueling.
[0096]
(4) In the present embodiment, the closing valve 53 is closed when it is determined that refueling is stopped through the processing of (1) above. Thereby, it becomes possible to reduce the amount of electric power consumed to open the closing valve 53 while the refueling is stopped.
[0097]
(5) In addition, the amount of vapor flowing into the canister 51 during refueling stop can be reduced.
(6) In the present embodiment, in the “oil supply determination process”, the blocking valve 53 is instantaneously closed. As a result, it is possible to determine whether or not refueling is in progress without causing unnecessary refueling stop or fuel blowback.
[0098]
(7) In this embodiment, when the elapsed time after opening the lid 37 becomes equal to or longer than the predetermined opening time Trox, an instantaneous valve closing operation of the blocking valve 53 is started. As a result, the number of executions of the closing operation of the blocking valve 53 can be minimized.
[0099]
Note that the first embodiment can be implemented as, for example, the following form, which is appropriately changed.
In the first embodiment, the predetermined opening time Trox is set as a time corresponding to the state in which the fuel is supplied to the pressure tank 31 to some extent after the lid 37 is opened. The setting mode of the predetermined opening time Trox can be changed as appropriate. For example, the predetermined opening time Trox may be set as a time corresponding to the time from when the lid 37 is opened until the supply of fuel into the pressure tank 31 is started. In short, the predetermined opening time Trox can be set to an appropriate value within a range in which the closing operation of the blocking valve 53 is performed after the supply of fuel into the pressure tank 31 is started.
[0100]
(Second Embodiment)
A second embodiment embodying the present invention will be described with reference to FIGS.
[0101]
In this embodiment, a vehicle (FIG. 1) equipped with a system similar to the sealed fuel tank system of the above embodiment is assumed.
By the way, in the refueling operation, the fuel supply may be performed in such a manner that after the fuel supply into the pressure tank 31 is temporarily stopped, the fuel supply is started again. On the other hand, in the “oil supply determination process” (FIG. 5), since it is determined that the fuel supply is stopped, the blockade valve 53 is maintained in the closed state. It is also possible that the subsequent refueling is not performed properly.
[0102]
Therefore, in the present embodiment, in consideration of the above, the “oil supply control” (FIGS. 3 to 5) is changed as follows.
(Lubrication control)
This control is configured by the following processes [a] to [d], and is performed through the ECU 7.
[A] “Core refueling treatment” (FIG. 7)
[B] “Refueling work start process” (FIG. 4)
[C] “Oil supply determination process” (FIG. 5)
[D] “Refueling determination process” (FIG. 8)
The “oil supply control” will be described with reference to FIGS. 7 and 8.
[0103]
This control is started when the conditions for performing the refueling operation are satisfied, and after the processing of the following steps S100 to S406 is performed, it is temporarily terminated.
The processing from steps S100 to S304 is performed in the same manner as in the first embodiment.
[0104]
[Step S400] A “refueling determination process” for determining whether or not refueling is temporarily stopped and restarted is executed.
[Step S401] It is determined whether or not the lid 37 is closed (determining whether or not the refueling operation is completed). The lid 37 is closed when it is detected through a separate process that the lid switch 40 is switched to “OFF”.
[0105]
When the lid 37 is opened, the process proceeds to step S402.
[Step S402] It is determined whether or not the increase amount of the tank pressure Pt (tank pressure increase amount ΔPt) is equal to or greater than a predetermined increase amount ΔPty. That is, the following conditions
ΔPt ≧ ΔPty
It is determined whether or not is satisfied.
[0106]
The predetermined increase amount ΔPty is set as a threshold value for determining whether or not the tank pressure increase amount ΔPt corresponds to the pressure increase amount at the start of refueling. Further, the predetermined amount of increase ΔPtx is set to a different value and used as a preset value.
[0107]
When the tank pressure increase amount ΔPt is equal to or greater than the predetermined increase amount ΔPty, it is determined that refueling has been resumed. On the other hand, when the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPty, refueling is stopped. It is determined as a state.
[0108]
When the tank pressure increase amount ΔPt is equal to or greater than the predetermined increase amount ΔPty, the process proceeds to step S403.
When the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPty, the process of step S401 is executed again.
[0109]
[Step S403] The blocking valve 53 is opened.
In the processing of steps S401 to S403, it is determined whether or not the refueling has been resumed after the refueling is stopped until the lid 37 is closed. And when refueling is restarted, the blocking valve 53 is opened.
[0110]
[Step S404] It is determined whether or not the valve opening period Tvo of the blocking valve 53 is equal to or longer than a predetermined valve opening period Tvox. That is, the following conditions
Tvo ≧ Tvox
It is determined whether or not is satisfied.
[0111]
When the valve opening period Tvo is less than the predetermined valve opening period Tvox, the above determination process is executed every predetermined period.
When the valve opening period Tvo is equal to or longer than the predetermined valve opening period Tvox, the process proceeds to step S405.
[0112]
[Step S405] The blocking valve 53 is instantaneously closed.
[Step S406] It is determined whether or not the increase amount of the tank pressure Pt (tank pressure increase amount ΔPt) corresponding to the closing operation of the blocking valve 53 is equal to or greater than a predetermined increase amount ΔPtx. That is, the following conditions
ΔPt ≧ ΔPtx
It is determined whether or not is satisfied.
[0113]
When the tank pressure increase amount ΔPt is equal to or greater than the predetermined increase amount ΔPtx (during refueling), the process of step S404 is executed again.
When the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPtx (while refueling is stopped), the process proceeds to step S407.
[0114]
[Step S407] The blocking valve 53 is closed. Thereafter, the process of step S401 is executed again.
In the processing of steps S404 to S407, it is determined whether or not refueling is performed based on the change in the tank pressure Pt according to the temporary closing of the closing valve 53. When it is determined that refueling is stopped, the blocking valve 53 is maintained in the closed state.
[0115]
When it is determined through the determination process in step S401 that the lid 37 is closed, the process returns to the “main oil supply process”. After returning, the “oil supply control” is terminated together with the “core oil supply process”.
[0116]
Next, the operational effects achieved through “oil supply control” will be described.
In this control, it is determined whether or not refueling has been resumed after the refueling is stopped until the lid 37 is closed (until the completion of the refueling operation is determined after the fuel supply is stopped). In addition, when it is determined that refueling is to be resumed, the blocking valve 53 is opened.
[0117]
Thereby, even when the supply of fuel into the pressure tank 31 is temporarily stopped, the refueling is promptly resumed.
In this control, after refueling is resumed, when it is determined that refueling is not being performed based on a change in the tank pressure Pt according to the temporary closing of the closing valve 53, the closing valve 53 is closed. I try to speak.
[0118]
Thereby, when refueling is stopped, the closing valve 53 is closed accurately.
Next, with reference to FIG. 9, an example of an oil supply mode by “oil supply control” will be described.
[0119]
It is assumed that the condition for performing the refueling operation is satisfied at time t91 (FIG. 9: [a]). At this time, the following processing is performed.
[E] “Opening of the blocking valve 53”.
[C] “Open lid 37”.
[0120]
It is assumed that supply of fuel to the pressure tank 31 is started at time t92 (FIG. 9: [b]).
Assume that the elapsed time (lid opening time Tro) after opening the lid 37 reaches a predetermined time Trox at time t93 (FIG. 9: [d]). At this time, the following processing is performed.
[E] “Momentary closing of the closing valve 53”.
[0121]
Thereby, since the pressure-resistant tank 31 is in a sealed state, the tank pressure Pt increases in accordance with the closing operation of the blocking valve 53. At this time, since refueling is being performed, the tank pressure increase ΔPt is equal to or greater than the predetermined increase ΔPtx (FIG. 9: [b] [f]).
[0122]
After time t93, the closing operation of the closing valve 53 is performed every predetermined valve opening period Tvo until the state where the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPtx is detected.
[0123]
It is assumed that refueling is temporarily stopped at time t94 (FIG. 9: [b]).
If it is detected at time t95 that the tank pressure increase ΔPt is less than the predetermined increase ΔPtx when the closing valve 53 is closed, the blocking valve 53 is closed accordingly. (FIG. 9: [e] [f]).
[0124]
It is assumed that refueling is resumed at time t96 (FIG. 9: [b]). At this time, the following processing is performed.
[E] “Opening of the blocking valve 53”.
[0125]
After time t96, the closing operation of the closing valve 53 is performed every predetermined valve opening period Tvox until a state in which the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPtx is detected.
[0126]
It is assumed that refueling is stopped at time t97 (FIG. 9: [b]).
If it is detected that the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPtx when the closing valve 53 is closed at time t98, the sealing valve 53 is closed accordingly. (FIG. 9: [e] [f]).
[0127]
If the lid 37 is closed at time t99, the “oil supply control” is terminated accordingly (FIG. 9: [c]).
As described above in detail, according to the control device for the sealed fuel tank system according to the second embodiment, in addition to the effects (1) to (7) according to the first embodiment, Furthermore, the effects listed below can be obtained.
[0128]
(8) In the present embodiment, it is determined whether or not the refueling has been resumed until the lid 37 is closed after the refueling is stopped, and when the resumption of the refueling is determined, the blocking valve 53 is set. The valve is opened. As a result, even when the fuel supply is temporarily stopped, the refueling operation can be suitably continued.
[0129]
(9) In the present embodiment, after the refueling is resumed, it is determined whether or not the refueling is performed based on the change in the tank pressure Pt according to the temporary closing of the closing valve 53. ing. Thereby, even after refueling is resumed, the closing valve 53 can be accurately closed when the refueling is stopped.
[0130]
In addition, the said 2nd Embodiment can also be implemented as the following forms which changed this suitably, for example.
In the second embodiment, the “refueling determination process” having the configuration illustrated in FIG. 8 is performed. However, the “refueling determination process” illustrated in the same embodiment is appropriately changed. It is also possible. In short, as long as the following processes are performed, the configuration of the “refueling determination process” can be changed as appropriate.
[A] It is determined whether or not refueling has been resumed based on the change in the tank pressure Pt from when it is determined that refueling is not performed until the refueling operation is completed.
[B] After determining that the refueling has been resumed, it is determined whether or not the refueling is being performed based on the change in the tank pressure Pt according to the instantaneous valve closing operation of the blocking valve 53.
[0131]
In the second embodiment, the predetermined increase amount ΔPtx and the predetermined increase amount ΔPty are set to different values, but the predetermined increase amount ΔPty is the same as the predetermined increase amount ΔPtx. It can also be set to a value.
[0132]
In the second embodiment, the completion of the refueling operation is determined when the lid 37 is closed. However, for example, it can be changed to any of the following [A] and [B].
[A] The completion of the refueling operation is determined when the refueling port cap 38 is attached to the refueling port 36.
[B] Completion of the refueling operation is determined when the lid switch 40 is switched to “OFF”.
[0133]
In short, as long as it is configured to determine the completion of the work by performing an appropriate operation for completion of the fueling work as exemplified above, the determination mode of the completion of the fueling work is the same as the above embodiment However, the present invention is not limited to the configuration exemplified above, and can be changed as appropriate.
[0134]
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS.
[0135]
In this embodiment, a vehicle (FIG. 1) equipped with a system similar to the sealed fuel tank system of the above embodiment is assumed.
By the way, in the “oil supply control”, it can be said that it is preferable in order to improve the oil supply performance to reduce the instantaneous valve closing operation of the blocking valve 53 performed until it is determined that the fuel supply is stopped. .
[0136]
Therefore, in the present embodiment, in consideration of the above, the “oil supply control” (FIGS. 3 to 5) is changed as follows.
(Lubrication control)
This control is configured by the following processes [a] to [c] and is performed through the ECU 7.
[A] "Main oil supply process" (Fig. 10)
[B] “Refueling work start process” (FIG. 4)
[C] “Oil supply determination process” (FIG. 5)
The “fuel supply control” will be described with reference to FIGS. 10 and 11.
[0137]
This control is started when the conditions for refueling are satisfied, and after the following steps S100 to S304 are performed, the control is temporarily terminated.
The processing from step S100 to S102 is performed in the same manner as in the first embodiment.
[0138]
[Step S200a] The timing (predetermined opening time Troy) for starting the closing operation of the blocking valve 53 is set based on the remaining amount of fuel (fuel amount Qf) in the pressure-resistant tank 31 at the start of the refueling operation. The fuel amount Qf can be detected through a sensor provided in the tank.
[0139]
FIG. 11 shows an example of a map that defines the relationship between the fuel amount Qf and the predetermined opening time Troy.
The predetermined opening time Troy is set to a larger value as the fuel amount Qf becomes smaller. Further, it is set as a time corresponding to a state in which the fuel is supplied to the pressure tank 31 to some extent after the lid 37 is opened. The predetermined opening time Troy corresponds to a predetermined time.
[0140]
[Step S200] It is determined whether or not the elapsed time (lid opening time Tro) after opening the lid 37 is equal to or longer than a predetermined opening time Troy set based on the fuel amount Qf. That is, the following conditions
Tro ≧ Troy
It is determined whether or not is satisfied.
[0141]
When the lid opening time Tro is less than the predetermined opening time Troy, the above determination process is executed every predetermined period.
When the lid opening time Tro is equal to or longer than the predetermined opening time Troy, the process proceeds to step S300.
[0142]
The processes after step S300 are performed in the same manner as in the first embodiment.
Next, the operational effects achieved through “oil supply control” will be described.
[0143]
In this control, the predetermined opening time Troy is set to a smaller value as the fuel amount Qf increases.
Incidentally, the time from when refueling is started until it is stopped basically becomes shorter as the fuel amount Qf is larger.
[0144]
Therefore, by setting the predetermined opening time Troy with the above-described mode, the closing operation of the blocking valve 53 is started when it is closer to the stop of refueling, so that the number of executions of the closing operation is reduced. .
[0145]
Next, an example of an oil supply mode by “oil supply control” will be described with reference to FIG.
It is assumed that the conditions for performing the refueling operation are satisfied at time t121 (FIG. 12: [a]). At this time, the following processes are performed.
[E] “Opening of the blocking valve 53”.
[C] “Open lid 37”.
Further, a predetermined opening time Troy is set according to the fuel amount Qf.
[0146]
It is assumed that fuel supply to the pressure tank 31 is started at time t122 (FIG. 12: [b]).
Assume that the elapsed time (lid opening time Tro) after opening the lid 37 reaches a predetermined time Troy at time t123 (FIG. 12: [d]). At this time, the following processing is performed.
[E] “Momentary closing of the closing valve 53”.
[0147]
It is assumed that oil supply to the pressure tank 31 is stopped at time t124 (FIG. 12: [b]).
If it is detected that the tank pressure increase ΔPt is less than the predetermined increase ΔPtx when the closing valve 53 is closed at time t125, the blocking valve 53 is closed accordingly. (FIG. 12: [e] [f]).
[0148]
As described above in detail, according to the control device for the sealed fuel tank system according to the third embodiment, in addition to the effects (1) to (7) according to the first embodiment, Furthermore, the effects listed below can be obtained.
[0149]
(10) In the present embodiment, the predetermined opening time Troy is set to a larger value as the fuel amount Qf becomes smaller. As a result, the number of executions of the closing operation of the blocking valve 53 can be further reduced.
[0150]
(11) Further, the oil supply property can be further improved.
Note that the third embodiment can be implemented as an appropriate modification of the above, for example, as follows.
[0151]
In the third embodiment, the relationship between the fuel amount Qf and the predetermined release time Troy is set to the relationship illustrated in FIG. 11, but the relationship between the fuel amount Qf and the predetermined release time Troy is illustrated as an example. The present invention is not limited to this and can be changed as appropriate.
[0152]
In the third embodiment, the “basic refueling process” having the configuration illustrated in FIG. 10 is performed. However, appropriate changes may be made to the “core refueling process” illustrated in each embodiment. Is possible.
[0153]
The third embodiment can be applied to the second embodiment. That is, the “processing for setting the predetermined opening time Troy based on the fuel amount Qf” and the “refueling determination processing” (FIG. 8) can be performed together.
[0154]
(Fourth embodiment)
A fourth embodiment embodying the present invention will be described with reference to FIGS.
[0155]
In the present embodiment, the number of executions of the valve closing operation is reduced as in the third embodiment. Since the configuration of the vehicle including the sealed fuel tank system is the same as that of the first embodiment (FIG. 1), duplicate description is omitted.
[0156]
Hereinafter, “oil supply control” of the present embodiment will be described.
(Lubrication control)
This control is configured by the following processes [a] to [c] and is performed through the ECU 7.
[A] "Core refueling treatment" (Figure 3)
[B] “Refueling work start process” (FIG. 4)
[C] “Oil supply determination process” (FIGS. 5 and 13)
With reference to FIG. 13, “oil supply control” will be described.
[0157]
This control is started when the conditions for refueling are satisfied, and after the following steps S100 to S304 are performed, the control is temporarily terminated.
The processing from step S100 to S302 is performed in the same manner as in the first embodiment.
[0158]
[Step S303a] Based on the elapsed time after opening the lid 37 (lid opening time Tro), a time interval (predetermined valve opening period Tvoy) for executing an instantaneous valve closing operation of the blocking valve 53 is set. Set.
[0159]
FIG. 14 shows an example of a map in which the relationship between the lid opening time Tro and a predetermined valve opening period Tvoy is set.
The predetermined valve opening period Tvoy is set to a smaller value as the lid opening time Tro becomes longer. Further, when the closing operation of the blocking valve 53 is performed in the predetermined valve opening period Tvoy, the value is set so as not to hinder the fuel supply. Note that the predetermined valve opening period Tvoy corresponds to a predetermined execution period.
[0160]
[Step S303] It is determined whether or not the opening period Tvo of the closing valve 53 after the closing operation of the closing valve 53 is equal to or longer than a predetermined opening period Tvoy set based on the lid opening time Tro. That is, the following conditions
Tvo ≧ Tvoy
It is determined whether or not is satisfied.
[0161]
When the valve opening period Tvo is less than the predetermined valve opening period Tvox, the process proceeds to step S303a, and the processes after step S303a are executed again.
When the valve opening period Tvo is equal to or longer than the predetermined valve opening period Tvox, the process proceeds to step S301 (FIG. 5), and the processes after step S301 are executed again.
[0162]
The processing after step S304 is performed in the same manner as in the first embodiment.
Next, the operational effects achieved through “oil supply control” will be described.
[0163]
In this control, the predetermined valve opening period Tvoy is set to a smaller value as the lid opening time Tro becomes longer.
Incidentally, in a normal refueling operation, the time during which fuel is supplied becomes longer according to the lid opening time Tro. That is, as the lid opening time Tro becomes longer, the possibility that the fuel supply is stopped increases.
[0164]
Therefore, by setting the predetermined valve opening period Tvoy in the above-described manner, the number of times of performing the closing operation of the closing valve 53 when the lid opening time Tro is short, that is, when the possibility of stopping the fuel supply is low is reduced. The Thereby, the number of executions of the valve closing operation until it is determined that the fuel supply is stopped is reduced.
[0165]
Next, with reference to FIG. 15, an example of an oil supply mode by “oil supply control” will be described.
It is assumed that the conditions for performing the refueling operation are satisfied at time t151 (FIG. 15: [a]). At this time, the following processes are performed.
[E] “Opening of the blocking valve 53”.
[C] “Open lid 37”.
[0166]
It is assumed that fuel supply to the pressure tank 31 is started at time t152 (FIG. 15: [b]).
Assume that the elapsed time (lid opening time Tro) after opening the lid 37 reaches a predetermined time Troy at time t153 (FIG. 15: [d]). At this time, the following processing is performed.
[E] “Momentary closing of the closing valve 53”.
[0167]
After time t153, a predetermined valve opening period Tvoy is set and set based on the lid opening time Tro until it is detected that the tank pressure increase ΔPt is less than the predetermined increase ΔPtx. The closing operation of the blocking valve 53 is performed every period. Note that the predetermined valve opening period Tvoy is set shorter as the lid opening time Tro increases.
[0168]
It is assumed that oil supply to the pressure tank 31 is stopped at time t154 (FIG. 15: [b]).
If it is detected that the tank pressure increase amount ΔPt is less than the predetermined increase amount ΔPtx when the closing valve 53 is closed at time t155, the blocking valve 53 is closed accordingly. (FIG. 15: [e] [f]).
[0169]
As described above in detail, according to the control device for the sealed fuel tank system according to the fourth embodiment, in addition to the effects (1) to (7) according to the first embodiment, Furthermore, the effects listed below can be obtained.
[0170]
(12) In the present embodiment, the predetermined valve opening period Tvoy is set to a smaller value as the lid opening time Tro becomes longer. As a result, the number of executions of the closing operation of the blocking valve 53 can be further reduced.
[0171]
In addition, the said 4th Embodiment can also be implemented as the following forms which changed this suitably, for example.
In the fourth embodiment, the relationship between the lid opening time Tro and the predetermined valve opening period Tvoy is set to the relationship illustrated in FIG. 14, but the relationship between the lid opening time Tro and the predetermined valve opening period Tvoy is set. Is not limited to the relationship illustrated in the above embodiment, and can be changed as appropriate.
[0172]
In the fourth embodiment, the “oil supply determination process” having the structure illustrated in FIG. 13 is performed. However, an appropriate change may be made to the “oil supply determination process” illustrated in each embodiment. Is possible.
[0173]
The fourth embodiment can be applied to the second embodiment. That is, the “processing for setting the predetermined valve opening period Tvoy based on the lid opening time Tro” and the “refueling determination processing” (FIG. 8) can be performed together.
[0174]
The fourth embodiment can be applied to the third embodiment. That is, the “processing for setting the predetermined valve opening period Tvoy based on the lid opening time Tro” and the “process for setting the predetermined opening time Troy based on the fuel amount Qf” may be performed together.
[0175]
In addition, this modified embodiment can be applied to the second embodiment. That is, “a process for setting the predetermined valve opening period Tvoy based on the lid opening time Tro”, “a process for setting the predetermined opening time Troy based on the fuel amount Qf”, and “a refueling determination process” (FIG. 8) can also be performed.
[0176]
(Other embodiments)
Other elements that can be changed in common with each of the above embodiments are listed below.
[0177]
In the above embodiments, as a condition for refueling,
[A] The lid switch 40 is switched to “ON”.
[B] The vehicle is stopped.
Although the above conditions [A] and [B] are employed, the conditions for refueling are not limited to these conditions, and appropriate conditions can be employed.
[0178]
In each of the above embodiments, the lid 37 is opened and the closing valve 53 is opened on the basis that the condition for performing the refueling operation is satisfied. However, the lid 37 opening operation and the closing valve are performed. It is also possible to execute the valve opening operation 53 at different timings.
[0179]
In each of the above embodiments, in the “oil supply control”, the valve closing operation of the blocking valve 53 is started when the time after the lid 37 is opened becomes equal to or longer than the predetermined opening time Trox. For example, it can be changed to any of the following [A] to [C].
[A] The closing operation of the closing valve 53 is started when the elapsed time after the filler cap 38 is removed from the filler port 36 becomes equal to or greater than a predetermined determination value.
[B] When the elapsed time after the closing valve 53 is opened (step S102) becomes equal to or greater than a predetermined determination value, the closing operation of the closing valve 53 is started.
[C] The closing operation of the closing valve 53 is started when the elapsed time after the lid switch 40 is switched to “ON” becomes equal to or greater than a predetermined determination value.
[0180]
In short, if the elapsed time since the start of the refueling operation is equal to or longer than a predetermined time, if the closing operation of the closing valve 53 is started, the setting mode of the start timing of the closing operation is appropriately set It can be changed. Moreover, if it is the structure which determines the start of the said operation | work when the appropriate operation concerning the start of the oil supply operation | work which was illustrated above was performed, the determination aspect of the start of the oil supply operation | work is in the said embodiment. The configuration is not limited to the exemplified configuration, and an appropriate configuration can be adopted.
[0181]
In each of the above embodiments, the “basic refueling process” having the configuration illustrated in FIG. 3 (FIGS. 7 and 10) is performed. It is also possible to make changes.
[0182]
In each of the above embodiments, the “refueling work start process” having the configuration illustrated in FIG. 4 is performed. However, an appropriate change may be added to the “refueling work start process” illustrated in each embodiment. Is possible.
[0183]
In each of the above embodiments, the “refueling determination process” having the configuration illustrated in FIG. 5 is performed. However, it is possible to appropriately change the “refueling determination process” illustrated in each embodiment. is there.
[0184]
In each of the above embodiments, it is configured to determine whether or not refueling is performed through the “refueling determination process”, but the determination mode in the same process is not limited to the configuration illustrated in each embodiment, and may be changed as appropriate. Is possible. In short, after the refueling operation is started, the blockade valve 53 is temporarily closed, and it is determined whether or not refueling is performed based on the change in the tank pressure Pt according to the valve closing operation. If there is, an arbitrary configuration can be adopted as the “oil supply determination process”.
[0185]
In each of the above embodiments, an open / close electromagnetic valve is employed as the blocking valve 53. However, for example, an electromagnetic valve capable of continuously adjusting the opening degree may be employed. In short, a control valve having an appropriate configuration can be adopted as the blocking valve 53 as long as the vapor passage 52 can be selectively switched to at least one of open / closed.
[0186]
In each of the above embodiments, an open / close electromagnetic valve is employed as the outside air control valve 55. However, the present invention is not limited to an electromagnetic valve having such a configuration, and an appropriate valve can be employed as the outside air control valve 55.
[0187]
In each of the above embodiments, an open / close electromagnetic valve is employed as the purge control valve 57. However, the purge control valve 57 is not limited to the electromagnetic valve having such a configuration, and a valve having an appropriate configuration can be employed as the purge control valve 57.
[0188]
In each of the above embodiments, the electric lid 37 driven through the actuator is assumed, but a mechanical lid can also be adopted. When such a configuration is adopted, the opening of the lid is detected through a sensor.
[0189]
In each of the above embodiments, the vapor processing apparatus 5 having the configuration illustrated in FIG. 1 is assumed. However, the configuration of the vapor processing apparatus 5 is not limited to the configuration illustrated in each embodiment, and an appropriate configuration is adopted. Can do.
[0190]
In each of the above embodiments, the sealed fuel tank system having the configuration illustrated in FIG. 1 is assumed. However, the configuration of the sealed fuel tank system is not limited to the configuration illustrated in each embodiment, and an appropriate configuration should be adopted. Can do. in short,
[I] "Fuel tank for storing fuel in a sealed state"
[B] “Canister that absorbs vapor”
[C] “Vapor passage connecting fuel tank and canister”
[D] “Control valve capable of selectively switching the vapor passage to at least open / close”
If it is the structure provided with these each element, it is possible to employ | adopt a suitable structure as a sealed fuel tank system.
[0191]
In each of the above embodiments, the present invention has been embodied assuming a sealed fuel tank system mounted on a vehicle. However, the present invention is not limited to a sealed fuel tank system for a vehicle, and the sealed fuel of an appropriate transportation means. Can be applied to tank system. Even when such a configuration is adopted, it is possible to obtain operational effects in accordance with the operational effects of the above-described embodiments.
[Brief description of the drawings]
FIG. 1 is a schematic diagram schematically showing the overall configuration of a sealed fuel tank system according to a first embodiment that embodies a sealed fuel tank system according to the present invention.
FIG. 2 is a diagram showing a variation tendency of tank pressure during refueling and during refueling stop.
FIG. 3 is a flowchart showing “main oil supply processing” performed as part of “oil supply control” in the same embodiment;
FIG. 4 is a flowchart showing a “oil supply work start process” performed as part of “oil supply control” in the embodiment.
FIG. 5 is a flowchart showing “oil supply determination processing” performed as part of “oil supply control” in the embodiment;
FIG. 6 is a timing chart showing an example of an oil supply mode by “oil supply control” in the embodiment;
FIG. 7 is a flowchart showing “main fuel supply processing” performed as part of “fuel supply control” in the second embodiment, which embodies a sealed fuel tank system according to the present invention.
FIG. 8 is a flowchart showing “refueling determination processing” performed as part of “oiling control” in the embodiment;
FIG. 9 is a timing chart showing an example of an oil supply mode by “oil supply control” in the embodiment;
FIG. 10 is a flowchart showing a “main fuel supply process” performed as part of “fuel supply control” in the third embodiment that embodies a sealed fuel tank system according to the present invention;
FIG. 11 is a graph showing an example of how to set a fuel amount and a predetermined opening time.
FIG. 12 is a timing chart showing an example of an oil supply mode by “oil supply control” of the same embodiment;
FIG. 13 is a flowchart showing a “fuel supply determination process” performed as part of “fuel supply control” in the fourth embodiment, which embodies a sealed fuel tank system according to the present invention.
FIG. 14 is a graph showing an example of how the lid opening time and the predetermined valve opening period are set.
FIG. 15 is a timing chart showing an example of an oil supply mode by “oil supply control” of the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Engine, 11 ... Engine main body, 12 ... Intake passage, 13 ... Throttle valve, 14 ... Air cleaner, 3 ... Fuel supply device, 31 ... Pressure-resistant tank, 32 ... Fuel pump, 33 ... Fuel supply passage, 34 ... Fuel supply pipe, 34a ... Communication pipe, 35 ... Fuel inlet box, 36 ... Filling port, 37 ... Lid, 38 ... Filling port cap, 39 ... Lid actuator, 40 ... Lid switch, 5 ... Vapor processing device, 51 ... Canister, 52 ... Vapor passage 53 ... Sealing valve, 54 ... Outside air introduction passage, 55 ... Outside air control valve, 56 ... Purge passage, 57 ... Purge control valve, 7 ... Electronic control unit (ECU), S1 ... Engine water temperature sensor, S2 ... Tank pressure sensor.

Claims (10)

A fuel tank that stores fuel; a canister that adsorbs vaporized fuel in the fuel tank; a vapor passage that connects the fuel tank and the canister; and a control valve that selectively opens and closes the vapor passage. In a control apparatus for a sealed fuel tank system, which is applied to a sealed fuel tank system and ensures the sealed state of the fuel tank through the closing of the control valve, while opening the control valve when a fueling operation is started.
Control means for temporarily closing the control valve after the start of the refueling operation and determining whether or not refueling is performed based on a pressure change in the fuel tank according to the valve closing operation. A control device for a sealed fuel tank system, comprising: The control device for a sealed fuel tank system according to claim 1,
The control device of the sealed fuel tank system, wherein the control means determines that refueling is not performed based on an increase in pressure in the fuel tank being less than a predetermined increase. The control device for a sealed fuel tank system according to claim 1 or 2,
The said control means performs the valve closing operation of the said control valve for every predetermined | prescribed execution period, The control apparatus of the sealed fuel tank system characterized by the above-mentioned. The control device for a sealed fuel tank system according to claim 3,
The control device of the sealed fuel tank system, wherein the control means starts a closing operation of the control valve when an elapsed time from the start of the fueling operation becomes a predetermined time or more. The control device for a sealed fuel tank system according to claim 4,
The control device of the sealed fuel tank system, wherein the control means variably sets the predetermined time according to a remaining amount of fuel in the fuel tank at the start of the fueling operation. In the control apparatus of the sealed fuel tank system according to any one of claims 3 to 5,
The control device of the sealed fuel tank system, wherein the control means variably sets the predetermined execution period according to an elapsed time after the refueling operation is started. In the control apparatus of the sealed fuel tank system according to any one of claims 1 to 6,
The said control means maintains the said control valve in a valve-closed state, after determining that the fuel supply is not performed, The control apparatus of the sealed fuel tank system characterized by the above-mentioned. In the control apparatus of the sealed fuel tank system according to any one of claims 1 to 7,
An apparatus for controlling a sealed fuel tank system, wherein a period for temporarily closing the control valve is set to a period in which the valve closing operation does not interfere with a fuel supply operation. In the control apparatus of the sealed fuel tank system according to any one of claims 1 to 8,
The control means determines whether or not refueling has been resumed based on a change in pressure in the fuel tank from when it is determined that refueling is not performed to when the refueling operation is completed. Control device for sealed fuel tank system. The control device for a sealed fuel tank system according to claim 9,
After determining that refueling has been resumed, the control means temporarily closes the control valve, and refueling is performed based on a pressure change in the fuel tank in response to the valve closing operation. A control device for a sealed fuel tank system, characterized by determining whether or not there is.

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