JP2003314381A - Evaporation fuel recovery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently liquefy vapor collected in a canister and effectively recover it to a fuel tank without improving the pressure resistance of the fuel tank in particular. <P>SOLUTION: This evaporation fuel recovery device is provided with a canister 6 collecting vapor produced in the fuel tank 2, a suction pump 8 sucking the collected vapor from the canister 6, and a liquefaction device 9 liquefying fuel components of the sucked vapor, and this device recovers the fuel components liquefied by the liquefaction device 9 to the fuel tank 2. The liquefaction device 9 is provided with a sealed vessel 17, a separation membrane 18, and a receipt chamber 19 and a liquefaction chamber 20 partitioned by the separation membrane 18. The vapor sucked by the suction pump 8 is received in a receipt chamber 19 of the liquefaction device 9 and separated into air and the fuel components during permeating the separation membrane 18, and the separated fuel components are condensed and liquefied in the liquefaction chamber 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evaporated fuel recovery device for collecting evaporated fuel generated in a fuel tank by a canister, liquefying the collected evaporated fuel and recovering it in a fuel tank.

[0002]

2. Description of the Related Art Conventionally, as one of the devices mounted on a vehicle, there is known an evaporated fuel processing device for processing evaporated fuel (vapor) generated in a fuel tank without releasing it to the atmosphere. This device is provided with a canister for collecting vapor, and the vapor generated in the fuel tank is once adsorbed by the adsorbent inside the canister. Then, when the engine is in operation, the intake negative pressure generated in the intake passage is used to make use of the fuel component (hydrocarbon (H
(C) and the like) are purged into the intake passage through the purge passage to be used for combustion of the engine to process the vapor.

By the way, this type of device is a "purge system" which is constructed on the premise that the vapor collected in the canister is purged into the intake passage. Pressure is an important factor. The generation of such intake negative pressure involves the pumping action of the engine during operation and the throttling action of the throttle valve provided in the intake passage.

However, in recent years, from the viewpoint of reducing fuel consumption and exhaust gas emission, vehicles equipped with an "idling stop system" or a "hybrid system" have been proposed. Opportunity to get is getting less. That is, in the “idling stop system”, when the vehicle stops due to a signal waiting or the like, the engine is forcibly stopped without idling, so that the chance of generating the intake negative pressure is reduced accordingly. On the other hand, in the “hybrid system”, at least one of an engine (internal combustion engine) provided as a drive source of the vehicle and an electric motor is selectively used according to the driving situation of the vehicle. For this reason, the intake negative pressure cannot be obtained when the engine is stopped or when the vehicle is driven only by the electric motor. Therefore, even if this type of vehicle is equipped with the vaporized fuel processing device, the vapor once trapped in the canister is not easily purged into the intake passage, and the amount of vapor immediately exceeds the trapping capacity of the canister. Therefore, it becomes difficult to effectively treat the vapor generated in the fuel tank. Alternatively, some vehicles equipped with an "in-cylinder injection engine" that directly injects fuel into the combustion chamber do not have a throttle valve, and even in this type of vehicle, the vapor collected in the canister is purged into the intake passage. It's difficult to get it done.

Therefore, even if it is mounted on each special vehicle as described above, as a device capable of effectively treating the vapor generated in the fuel tank, the "purgeless system" which does not involve vapor purging is adopted for evaporation. A fuel recovery device is disclosed in JP-A-2000-104630 and JP-A-10-274.
No. 106 publication is proposed. This type of device temporarily collects the vapor generated in the fuel tank with a canister,
The collected vapor is liquefied and collected in the fuel tank.

For example, in the apparatus disclosed in Japanese Patent Laid-Open No. 2000-104630, as shown in FIG. 8, a canister 73 connected to a fuel tank 71 via a vapor introducing pipe 72 and the introducing pipe 72 are provided. Provided valve 74
A condenser 76 connected to the canister 73 via a desorbed gas inflow pipe 75, a suction pump 77 provided in the inflow pipe 75, and a condenser 76 provided between the condenser 76 and the fuel tank 71. A conduit 78 and an electronic element 79 for heating and cooling the canister 73 and cooling the condenser 76 using the Peltier effect for heating and cooling. In this device, the vapor generated in the fuel tank 71 is collected in the canister 73 through the vapor introducing pipe 72 by opening the valve 74. Then, the valve 74 is closed, the canister 73 is heated by the electronic element 79, and the suction pump 77 is operated. As a result, the vapor collected in the canister 73 is desorbed from the canister 73 and flown into the condenser 76 through the desorbed gas inflow pipe 75. Further, by cooling the condenser 76 with the electronic element 79, the vapor flowing into the condenser 76 is cooled and liquefied, and the fuel tank 7 is supplied through the conduit 78.
It is supposed to return to 1.

[0007]

However, in the apparatus of the "purgeless system" of the above-mentioned conventional publication, it is only disclosed that a large number of fins are provided inside the condenser 76. Therefore, the suction pump 7
When the air conditioner 7 is operated, the air discharged by depressurization is also sent to the fuel tank 71 through the condenser 76, and the fuel tank 71 is pressurized.
1 requires high withstand voltage. In contrast,
It may be possible to reduce the suction capacity of the suction pump 77 in order to prevent the pressure applied to the fuel tank 71 from increasing. However, in this case, the efficiency of desorption of vapor from the canister 73 decreases, and the canister 73
Playback will be delayed.

On the other hand, by providing a valve in the conduit 78,
The pressure when the suction pump 77 is operated is the fuel tank 7
It is also possible not to directly join 1. However, in such a case, only the condenser 76 is pressurized so that the vapor is simultaneously liquefied and the fuel tank 7 is liquefied.
It will be difficult to return to 1.

The present invention has been made in view of the above circumstances, and an object thereof is to efficiently liquefy a vapor collected in a canister without the need for particularly enhancing the pressure resistance of a fuel tank or the like as a purgeless system. Another object of the present invention is to provide an evaporated fuel recovery device that enables effective recovery to the fuel tank.

[0010]

In order to achieve the above object, the invention as set forth in claim 1 provides a canister for collecting evaporated fuel generated in a fuel tank, and a collected canister. Suction means for sucking out from the canister,
In an evaporative fuel recovery device that includes a liquefying means for liquefying the fuel component of the sucked evaporative fuel and recovers the liquefied fuel component to a fuel tank, the liquefying means includes a closed container and a closed container thereof. A separation membrane provided inside, and a receiving chamber and a liquefaction chamber partitioned by the separation membrane,
By receiving the sucked vaporized fuel in the receiving chamber and permeating the separation membrane, the vaporized fuel is separated into air and fuel components, and the separated fuel components are condensed and liquefied in the liquefaction chamber. The purpose is.

According to the structure of the above invention, the evaporated fuel generated in the fuel tank and collected in the canister is sucked out from the canister by the sucking means and sent to the liquefying means.
In the liquefying means, the fuel component in the evaporated fuel is liquefied and collected in the fuel tank. Here, in the liquefying means, since the inside of the closed container is divided into the receiving chamber and the liquefying chamber by the separation membrane, the evaporated fuel received in the receiving chamber permeates the separation membrane. At this time, the evaporated fuel is separated into air and a fuel component by the separation membrane, and the separated fuel component is condensed and liquefied in the liquefaction chamber. Therefore, even if the evaporated fuel is received in the receiving chamber together with the suction pressure by the suction means, most of the fuel component permeates the separation membrane because the liquefaction chamber and the fuel tank are pressurized by the suction pressure. Less is.

In order to achieve the above object, the invention described in claim 2 is, in the invention described in claim 1, provided in a liquefaction chamber with tank internal pressure detection means for detecting the internal pressure of the fuel tank, Cooling means for cooling the separated fuel component, recovery adjusting means for adjusting the flow of the liquefied fuel component recovered from the liquefaction chamber to the fuel tank, and internal pressure of the fuel tank to be detected are set to predetermined values. When the temperature is lower, the cooling means is controlled to cool the separated fuel component, and the recovery control means is controlled to recover the liquefied fuel component to the fuel tank.

According to the above configuration, when the internal pressure of the fuel tank detected by the tank internal pressure detecting means is lower than a predetermined set value, the cooling means and the recovery adjusting means are controlled by the recovery control means and the liquefaction chamber is operated. The fuel component is cooled by the cooling means, and the liquefied fuel component is flown to the fuel tank by the recovery adjusting means. Therefore, in addition to the action of the invention described in claim 1, the liquefaction of the fuel component is promoted only when the internal pressure of the fuel tank is relatively low, and the liquefied fuel component is flown to the fuel tank. The high internal pressure does not act on the liquefaction chamber to prevent the liquefaction of fuel components and the flow toward the fuel tank.

In order to achieve the above object, the invention according to claim 3 is the invention according to claim 1 or 2, wherein the receiving chamber pressure detecting means for detecting the internal pressure of the receiving chamber is detected. When the internal pressure of the receiving chamber is lower than a predetermined set value, it is intended to include suction control means for controlling the suction means for sucking the evaporated fuel from the canister and receiving it in the receiving chamber.

According to the above configuration, when the internal pressure of the receiving chamber detected by the receiving chamber pressure detecting means is lower than the predetermined set value, the suction control means controls the suction means,
The evaporated fuel is sucked out from the canister and is received in the receiving chamber. Therefore, in addition to the action of the invention described in claim 1 or 2, the internal pressure of the receiving chamber does not become excessively high due to the reception of the evaporated fuel.

According to the structure of the above invention, the invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the fuel concentration for detecting the fuel concentration in the receiving chamber is detected. A detection means, an atmosphere communication adjusting means for adjusting the communication with the atmosphere in the receiving chamber, and an atmosphere communication adjusting means for reducing the internal pressure of the receiving chamber when the detected fuel concentration is lower than a predetermined set value. It is intended to include an atmosphere communication control means for controlling.

According to the structure of the above invention, when the fuel concentration in the receiving chamber detected by the fuel concentration detecting means is low, the atmosphere communication controlling means controls the atmosphere communicating adjusting means so that the internal pressure of the receiving chamber is increased. Decrease to atmospheric pressure. Therefore, in addition to the action of the invention according to any one of claims 1 to 3,
As the internal pressure of the receiving chamber decreases to the atmospheric pressure, the capacity for receiving evaporated fuel in the receiving chamber increases. Also, since the concentration of the evaporated fuel in the receiving chamber is relatively low, the problem of atmospheric pollution due to the evaporated fuel is small.

In order to achieve the above-mentioned object, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the internal pressure of the receiving chamber is introduced into the canister as back pressure. It is intended to include an internal pressure introducing means and an internal pressure introducing control means for controlling the internal pressure introducing means according to the state of the evaporated fuel in the receiving chamber.

According to the structure of the above invention, the internal pressure introducing means is controlled by the internal pressure introducing control means according to the state of the evaporated fuel in the receiving chamber, and the internal pressure of the receiving chamber is introduced into the canister as back pressure. Therefore, in addition to the operation of the invention described in any one of claims 1 to 4, the back pressure introduced into the canister promotes the desorption of the evaporated fuel collected in the canister.

In order to achieve the above object, the invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the return of the evaporated fuel from the receiving chamber to the canister is adjusted. When the evaporative fuel is not sucked out by the return adjusting means and the suction means, the return of the evaporated fuel from the receiving chamber to the canister is permitted, and when the evaporated fuel is sucked out, the receiving chamber is moved to the canister. And a return control means for controlling the return adjusting means so as to regulate the return of the evaporated fuel.

According to the above configuration, when the evaporative fuel is not sucked out by the suction means, the return control means controls the return adjusting means to permit the return of the evaporated fuel from the receiving chamber to the canister. Therefore, claim 1
In addition to the effect of the invention described in any one of 5 to 5, the evaporated fuel remaining in the receiving chamber is returned to the canister and is collected again, and the canister that is in a depressurized state by sucking the evaporated fuel is used. Return to normal pressure.

In order to achieve the above-mentioned object, the invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the heating for heating the vaporized fuel collected in the canister. Means, and a heating control means for controlling the heating means for heating the evaporated fuel when the evaporated fuel is sucked out by the suction means.

According to the above configuration, when the evaporated fuel is sucked out from the canister, the heating means is controlled by the heating control means to heat the evaporated fuel collected in the canister. Therefore, in addition to the operation of the invention described in any one of claims 1 to 6, when the evaporated fuel is sucked out, the heating promotes the desorption of the evaporated fuel from the canister.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the fuel vapor recovery system of the present invention will be described in detail below with reference to the drawings.

The evaporative fuel recovery system of this embodiment is to be mounted on a special vehicle that employs the "idling stop system" or "hybrid system" or a vehicle that employs the "cylinder injection engine". To do.

FIG. 1 shows a schematic block diagram of an evaporated fuel recovery system according to this embodiment. A gasoline engine system for a vehicle includes an engine 1 and a fuel tank 2 for containing fuel supplied to the engine 1. A fuel pump 3 is built in the fuel tank 2. The fuel discharged by the fuel pump 3 is supplied to the engine 1 through the fuel line 4.

This evaporated fuel recovery device is for collecting evaporated fuel (vapor) generated in the fuel tank 2 without releasing it into the atmosphere and recovering it in the fuel tank 2. This apparatus has a canister 6 for collecting the vapor generated in the fuel tank 2 through a vapor line 5, a suction pump 8 for sucking the vapor collected by the canister 6 through a suction line 7, and the suction pump 8 for sucking the vapor. Liquefier 9 for liquefying fuel components (HC etc.) in vapor
And a recovery line 10 for recovering the fuel component liquefied by the liquefier 9 into the fuel tank 2.

The canister 6 is an adsorbent 1 made of activated carbon.
Built-in 1. The interior of the canister 6 is divided into a vapor chamber 12 and an atmosphere chamber 13 with the adsorbent 11 as a boundary. Adsorbent 1
Inside 1, there is provided a heater 14 for heating the vapor collected therein. The heater 14 is composed of a heating element device such as a piezo element and corresponds to the heating means of the present invention. The vapor from the vapor line 5 is received in the vapor chamber 12. Atmosphere chamber 13 is air pipe 15
Can communicate with the atmosphere. An electromagnetic first valve 31 for opening and closing the vapor line 5 is provided in the middle of the vapor line 5. The air pipe 15 is provided with an electromagnetic second valve 32 for opening and closing the passage 15.

The suction pump 8 is an electric pump,
The suction line 7 constitutes the suction means of the present invention together with the suction line 7. In the suction line 7, the bypass passage 1 bypassing the suction pump 8 is provided.
6 is provided. This bypass passage 16 has the same passage 1
An electromagnetic third valve 33 for opening and closing 6 is provided. The suction pump 8 has a built-in check valve (not shown) for restricting the reverse flow of vapor in the suction line 7.

The liquefier 9 corresponds to the liquefying means of the present invention, and includes a closed container 17, a separation membrane 18 provided inside the closed container 17, a receiving chamber 19 partitioned by the separation membrane 18, and And a liquefaction chamber 20. And the liquefier 9
Receives the vapor sucked from the canister 6 in the receiving room 19
The vapor is separated into the air and the fuel component by being received by and permeating the separation membrane 18, and the separated fuel component is condensed and liquefied in the liquefaction chamber 20.

The function of the separation membrane 18 is to dilute the fuel component (H
C) and the like are concentrated so that the permeation rate of the fuel component is higher than that of other gas (air or the like). As the material of the separation membrane 18, for example, HC such as silicone rubber is used.
The one with high solubility is used. The separation membrane 18 may have a flat plate shape, a hollow shape, or a honeycomb shape. In this embodiment, the separation membrane 1 is a ceramic honeycomb porous body coated with silicone rubber.
Used as 8. According to this structure, the silicone rubber having a relatively low pressure resistance is reinforced by the ceramic serving as a support, and the structure becomes strong. Further, according to this structure, since the honeycomb porous structure is adopted, the surface area of the membrane is expanded and the separation speed of the fuel component can be increased. As the support, in addition to the ceramic honeycomb porous body, a base cloth, a resin foam, a metal net, or the like can be used. In order to increase the surface area of the membrane, in addition to the honeycomb porous body, a spiral shape adopted in an oil filter may be used.

The liquefaction chamber 20 is provided with a cooler 21 for cooling the fuel component separated by the separation membrane 18. The cooler 21 is composed of a cooling element device such as a Peltier element and corresponds to the cooling means of the present invention.

In the liquefier 9, the vapor received from the suction line 7 into the receiving chamber 19 is separated into air and fuel components by the separation membrane 18, and only the separated fuel components enter the liquefying chamber 20. However, when the vapor separation speed by the separation membrane 18 is slower than the vapor reception speed in the reception chamber 19, some vapor may remain in the reception chamber 19. Therefore, in this embodiment, when the suction pump 8 is stopped, the vapor remaining in the receiving chamber 19 is returned to the canister 6, and therefore, the bypass line 16 is provided in the suction line 7.
And a third valve 33 is provided. The bypass passage 16 and the third valve 33 correspond to the return adjusting means of the present invention.

The recovery line 10 is provided with a fourth valve 34 which is an electromagnetic valve for opening and closing the line 10. The recovery line 10 and the fourth valve 34 are for adjusting the flow of the liquefied fuel component recovered from the liquefaction chamber 20 to the fuel tank 2, and correspond to the recovery adjusting means of the present invention.

In addition, the fuel tank 2 is provided with a first pressure sensor 41 for detecting the internal pressure (tank internal pressure) Pt of the fuel tank 2. The pressure sensor 41 corresponds to the tank internal pressure detecting means of the present invention. In addition, the liquefier 9
A second pressure sensor 42 for detecting the internal pressure (reception chamber pressure) Pu of the reception chamber 19 is provided. The pressure sensor 42 corresponds to the receiving room pressure detecting means of the present invention.

This evaporative fuel recovery system is an electronic control unit (ECU) for executing the vapor recovery control of this system.
40 is provided. The ECU 40 includes the first to fourth valves 3
1 to 34 are connected. Similarly, the suction pump 8, the heater 11, the cooler 21, and the first and second pressure sensors 41 and 42 are connected to the ECU 40, respectively. Besides this, E
The battery 25 is connected to the CU 40 via an ignition switch 26. By operating this switch 26, turning on / off of power to the ECU 40,
The engine 1 is started and stopped. Furthermore, the ECU 4
0 indicates various sensors for detecting the operating state of the engine 1 (for example, an engine speed sensor or the like (not shown))
Are connected.

The ECU 40 constitutes the recovery control means of the present invention, and when the tank internal pressure Pt detected by the first pressure sensor 41 is lower than a predetermined set value, the fuel components separated by the liquefier 9 are separated. The cooler 21 is operated to cool the fuel, and the fourth valve 34 is opened to recover the liquefied fuel component to the fuel tank 2.

The ECU 40 constitutes the suction control means of the present invention, and when the receiving chamber pressure Pu detected by the second pressure sensor 42 is lower than a predetermined set value, suction is performed to suck the vapor. The pump 8 is operated.

The ECU 40, which constitutes the return control means of the present invention, allows the vapor to be returned from the receiving chamber 19 to the canister 6 when the vapor is not sucked out by the suction pump 8, and the vapor is returned to the canister 6. The third valve 33 is selectively opened and closed so as to regulate the return of the vapor from the receiving chamber 19 to the canister 6 when the suction is performed.

Further, the ECU 40 constitutes the heating control means of the present invention, and the heater 1 is used to heat the vapor when the vapor is sucked by the suction pump 8.
4 can be operated.

The ECU 40 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), a backup RAM, an external input circuit and an external output circuit. The ROM stores in advance a predetermined control program relating to vapor recovery control and the like. RAM
Temporarily stores the calculation result of the CPU. The CPU controls the valves 31 to 34, the suction pump 8, the heater 14, and the cooler 21 in order to execute the vapor recovery control based on the detection signals of the pressure sensors 41 and 42 input via the input circuit. .

Next, the processing contents of the vapor recovery control executed by the ECU 40 will be described in detail. FIG. 2 shows a flow chart of this control routine. The ECU 40 executes this routine by operating the ignition switch 26.
It starts at the same time when the power is turned on to 40.

When the processing shifts to this routine, first,
In step 100, the ECU 40 determines whether the engine 1 is operating. The ECU 40 makes this determination based on the detection value of the engine rotation speed sensor or the like.
If this determination result is affirmative, the ECU 40 shifts the processing to step 110.

At step 110, the ECU 40 determines whether or not the value of the tank internal pressure Pt detected by the first pressure sensor 41 is lower than a predetermined set value P1. If the result of this determination is affirmative, the ECU 40 shifts the processing to step 120 assuming that the amount of vapor generated in the fuel tank 2 is small.

At step 120, the ECU 40 closes the first and second valves 31, 32. As a result, the canister 6 is shut off from the fuel tank 2 and the atmosphere.

Next, at step 130, the ECU 40
The suction pump 8 is operated and the heater 14 is turned on. As a result, the vapor collected in the adsorbent 11 is heated,
The desorption of vapor from the adsorbent 11 is promoted, and the desorbed vapor is sucked from the canister 6 by the suction pump 8 and sent to the liquefier 9 through the suction line 7 and received in the receiving chamber 19. .

Then, in step 131, the ECU 40
Is the receiving chamber pressure Pu detected by the second pressure sensor 42.
It is determined whether the value of is higher than the predetermined set value P2. If the result of this determination is negative, the ECU 40 returns the process to step 130 and repeats the processes of steps 130 and 131, assuming that the acceptance of the vapor into the receiving chamber 19 is permitted. If the result of this determination is affirmative, the ECU 4 is operated to regulate the acceptance of the vapor into the acceptance chamber 19.
0 shifts the processing to step 140.

In step 140, the ECU 40 stops the suction pump 8 and turns off the heater 14. As a result, the heating of the vapor in the adsorbent 11 is stopped, the suction of the vapor from the canister 6 is stopped, and the acceptance of the vapor in the receiving chamber 19 is stopped.

Then, in step 141, the ECU 40
Is the receiving chamber pressure Pu detected by the second pressure sensor 42.
It is determined whether the value of is lower than the predetermined set value P3. If the result of this determination is negative, the ECU 40 determines that the acceptance of vapor into the receiving chamber 19 is to be continued.
The process is returned to step 140, and steps 140 and 141 are executed.
The process of is repeated. If this determination is positive, E
The CU 40 executes the processing in steps 150 and 160.
Then, the series of processing in steps 150 to 152 and the series of processing in steps 160 to 165 are executed in parallel.

The behavior of the receiving chamber pressure Pu is shown in the time chart of FIG. As shown in FIG. 3, at time t1,
When the acceptance of vapor into the receiving chamber 19 is stopped, in the receiving chamber 19, the vapor is separated into the fuel component and the air by the separation membrane 18, and the separated fuel component permeates the separation membrane 18, The receiving chamber pressure Pu decreases with time. Then, at time t2, the acceptance of the vapor into the receiving chamber 19 is stopped until the receiving chamber pressure Pu that decreases with time reaches the set value P3. Therefore, between the times t1 and t2 in FIG. 3, that is, the receiving chamber pressure Pu is set to the set value P.
The separation of the vapor by the separation membrane 18 is performed in the range of 2 to P3.

Then, in step 150, the ECU 40
Opens the third valve 33. As a result, the receiving room 19
The vapor can be returned to the canister 6 through the suction line 7 and the bypass passage 16.

Next, at step 151, the ECU 40
It is determined whether the value of the receiving chamber pressure Pu is equal to the normal pressure value (atmospheric pressure value) P0. If the result of this judgment is negative, E
The CU 40 returns the process to step 150, and returns to step 1
The processing of 50 and 151 is repeated. If the determination result is affirmative, the ECU 40 closes the third valve 33 in step 152. As a result, the return of the vapor from the receiving chamber 19 to the canister 6 is restricted. After that, in order to restart the acceptance of the vapor from the canister 6 into the receiving chamber 19, the ECU 40 returns the process to step 130 and repeats the processes of step 130 and the subsequent steps.

In parallel with the processing of steps 150 to 152, in step 160, the ECU 40 turns on the cooler 21. This cools the inside of the liquefaction chamber 20 of the liquefier 9.

Next, at step 161, the ECU 40
Turn on the time counter.

Next, at step 162, the ECU 40
The cooler 21 is operated for a predetermined time measured by the time counter to cool the fuel component that has entered the liquefaction chamber 20. This promotes the liquefaction of the fuel component.

Next, at step 163, the ECU 40
The fourth valve 34 is opened. As a result, the liquefied fuel component returns to the fuel tank 2 through the recovery line 10.

Next, in step 164, the ECU 40
The opened state of the fourth valve 34 is left for a predetermined time measured by the time counter.

Then, in step 165, the ECU 40
Turns off the cooler 21 and causes the fourth valve 3 to
Close 4

Through the series of processes in steps 160 to 165, the fuel component liquefied in the liquefaction chamber 20 is returned to the fuel tank 2 through the recovery line 10 and recovered.

On the other hand, when the determination result of step 100 is negative (when the engine 1 is not in operation) or when the determination result of step 110 is negative (when the tank internal pressure Pt is not lower than the predetermined set value P1). , The ECU 40
The process proceeds to step 170. And step 1
At 70, the ECU 40 causes the first and second valves 31, 3 to
2 is opened, and the third and fourth valves 33 and 34 are closed to initialize the valves 31 to 34.

According to the fuel vapor recovery system of the present embodiment described above, the vapor generated in the fuel tank 2 is introduced into the canister 6 through the vapor line 5 and collected in the adsorbent 11 thereof. The collected vapor is the suction pump 8
Is sucked from the canister 6 and sent to the liquefier 9 through the suction line 7. The fuel component of the vapor sent to the liquefier 9 is liquefied and is recovered in the fuel tank 2 through the recovery line 10.

Since this device is of the type in which the vapor is collected as described above and then recovered in the fuel tank 2, that is, the "purgeless system", unlike the conventional evaporated fuel processing device, the intake negative pressure is reduced. It is not necessary to purge the intake passage with vapor, and the vapor collected in the canister 6 can be processed without depending on the presence or absence of intake negative pressure. Therefore, even in a vehicle equipped with an "idling stop system" or a "hybrid system", a vehicle equipped with a "cylinder injection engine", or the like, this vaporized fuel recovery device is applied to generate vapor in the fuel tank 2. Can be effectively processed.

Here, in the liquefier 9, the inside of the closed container 17 is divided into the receiving chamber 19 and the liquefying chamber 20 by the separation membrane 18, and the receiving chamber 19 receives the vapor. Therefore, the vapor sucked from the canister 6 by the suction pump 8 is received in the receiving chamber 19 and permeates the separation membrane 18. At this time, the vapor is separated into air and a fuel component by the separation membrane 18, and the separated fuel component is condensed and liquefied in the liquefaction chamber 20. Therefore, in the vapor received in the receiving chamber 19 together with the suction pressure by the suction pump 8, most of the permeation through the separation membrane 18 is the fuel component, so that the liquefaction chamber 20 and the fuel tank 2 are sucked by the suction pressure. Less likely to be pressurized. Further, since it is not necessary to reduce the suction capacity of the suction pump 8 in order to prevent the pressure applied to the fuel tank 2 from increasing, the efficiency of desorption of vapor from the canister 6 does not decrease, and desorption of vapor does not occur. The regeneration of the accompanying canister 6 can be promoted. Therefore, in this device, it is not necessary to particularly enhance the pressure resistance of the fuel tank 2 in consideration of the suction pressure as a purgeless system, and the vapor trapped in the canister 6 is efficiently liquefied and effectively transferred to the fuel tank 2. The canister 6 can be recovered, and at the same time, the regeneration capability of the canister 6 can be enhanced.

According to the evaporated fuel recovery system of this embodiment, in the liquefier 9, the fuel component separated from the vapor by the separation membrane 18 is cooled by the cooler 21 in the liquefaction chamber 20 to promote liquefaction. Therefore, the separated fuel component can be liquefied in a relatively short time, which can promote the acceptance of new vapor into the receiving chamber 19. Further, the liquefied fuel component accumulated in the liquefaction chamber 20 flows from the liquefaction chamber 20 to the fuel tank 2 through the recovery line 10 and the fourth valve 34, and the flow is adjusted by opening / closing the fourth valve 34. here,
Tank internal pressure pt detected by the first pressure sensor 41
When the value of is lower than the predetermined set value P1, the ECU 40 turns on the cooler 21 and opens the fourth valve 34. As a result, the fuel component separated by the separation membrane 18 is cooled by the cooler 21 and quickly liquefied, and flows into the fuel tank 2 through the recovery line 10 and is recovered. Therefore, only when the tank internal pressure Pt is relatively low,
The liquefaction chamber 20 and the fuel tank 2 communicate with each other,
Since the fuel component is caused to flow from the fuel tank 2 to the fuel tank 2, the high internal pressure of the fuel tank 2 does not act on the recovery line 10 and the liquefaction chamber 20 to hinder the liquefaction of the fuel component and the flow of the fuel component toward the fuel tank 2. . Therefore, the fuel component in the vapor can be efficiently liquefied by the liquefier 9, and the liquefied fuel component can be promptly recovered in the fuel tank 2.

According to the fuel vapor recovery system of this embodiment, the vapor is sucked from the canister 6 only when the value of the receiving chamber pressure Pu detected by the second pressure sensor 42 is lower than the predetermined set value P2. Receiving room 1 for liquefier 9
Accepted by 9. Therefore, the receiving chamber pressure Pu does not become higher than necessary by receiving the vapor. For this reason, it is not necessary to design the pressure resistance of the closed container 17 including the receiving chamber 19 to be higher than necessary, and the pressure resistant structure of the closed container 17 can be simplified.

According to the fuel vapor recovery system of this embodiment, when the suction pump 8 does not suck the vapor, the ECU 40 opens the third valve 33 to move the receiving chamber 19 toward the canister 6. Vapor return is allowed through the suction line 7. Therefore, the vapor remaining in the receiving chamber 19 is returned to the canister 6 and is again collected by the adsorbent 11, and the canister 6 that has been depressurized by the suction of the vapor is returned to the normal pressure state. Therefore, the vapor remaining in the receiving chamber 19 is prevented from accidentally leaking to the outside, and the canister 6 can be prepared for collecting new vapor.

According to the evaporated fuel recovery system of this embodiment, when the suction pump 8 sucks vapor from the canister 6, the ECU 40 turns on the heater 14 to heat the vapor trapped in the adsorbent 11. To be done.
Therefore, when the vapor is sucked out from the canister 6, the heating promotes the desorption of the vapor from the adsorbent 11. Therefore, the amount of vaporization from the canister 6 can be accelerated by the amount of heating by the heater 14, and the regeneration of the canister 6 can be promoted.

[Second Embodiment] A second embodiment of the fuel vapor recovery system of the present invention will be described below with reference to the drawings.

In each of the following embodiments including the present embodiment, the same components as those described in the first embodiment will be designated by the same reference numerals. The description will be omitted, and different points will be mainly described below.

FIG. 4 shows a schematic configuration diagram of the evaporated fuel recovery device according to the present embodiment. In the present embodiment, the bypass passage 16 and the third valve 33 are eliminated, and the fuel concentration sensor 43, the air pipe 22 and the fifth valve 35 are provided in the receiving chamber 19 of the liquefier 9, and the first valve is provided. The configuration is different from that of the embodiment.

Here, the fuel concentration sensor 43 is provided in the receiving chamber 1
It is for detecting the vapor concentration in 9, that is, the fuel concentration Df, and corresponds to the fuel concentration detecting means of the present invention. The air pipe 22 connects the receiving chamber 19 to the atmosphere, and the electromagnetic fifth valve 35 is for selectively opening and closing the pipe 22. Both 2
Reference numerals 2 and 35 constitute the atmosphere communication adjusting means of the present invention. E
When the value of the fuel concentration Df detected by the fuel concentration sensor 43 is lower than a predetermined set value, the CU 40 receives the receiving chamber pressure P.
The fifth valve 35 is designed to be opened to reduce u. The ECU 40 that executes this control corresponds to the atmosphere communication control means of the present invention.

Next, the processing contents of the vapor recovery control executed by the ECU 40 will be described with reference to the flowchart of FIG. In the flowchart of FIG. 5, step 141 in FIG. 2 is replaced with step 241, step 150 is replaced with step 250, step 152 is replaced with step 252, and step 170 is replaced with step 270. The contents are different.

That is, in the flowchart of FIG. 5, when the value of the receiving room pressure Pu is higher than the predetermined set value P2 in step 131, the ECU 40 stops the suction pump 8 and turns off the heater 14 in step 140. After that, in step 241, the ECU 40 determines whether or not the value of the fuel concentration Df detected by the fuel concentration sensor 43 is lower than a predetermined set value D1. Here, the predetermined set value D1 corresponds to a fuel concentration Df at which air pollution does not pose a problem even if it is released into the atmosphere as vapor. If the determination result is negative, the ECU 40 returns the process to step 140 and repeats the processes of steps 140 and 241. If the result of this determination is affirmative, the ECU 40 shifts the processing to steps 250 and 160, and step 25
0, 151, 252 and a series of steps 160 to 160
A series of processing of 165 is executed in parallel.

Here, in step 250, the ECU 40
Opens the fifth valve 35. As a result, the receiving room 19
Communicate with the atmosphere, the internal pressure of the receiving chamber 19 is released to the atmosphere,
The receiving chamber pressure Pu decreases.

Then, in step 151, the ECU 40
Determines whether the value of the receiving room pressure Pu is equal to the normal pressure value (atmospheric pressure value) P0. If the determination result is negative, the ECU 40 returns the process to step 250 and repeats the processes of steps 250 and 151. If the determination result is affirmative, the ECU 40 closes the fifth valve 35 in step 252. As a result, the release of the internal pressure of the receiving chamber 19 to the atmosphere is stopped. Then canister 6
In order to restart the acceptance of the vapor into the receiving chamber 19 from the ECU 40, the ECU 40 returns the process to step 130 and repeats the processes of step 130 and the subsequent steps.

On the other hand, in step 270 after shifting from steps 100 and 110, the ECU 40 opens the first and second valves 31 and 32 and opens the fourth and fifth valves 34 and
By closing 35, each valve 31, 32, 34,
35 is initialized.

According to the fuel vapor recovery apparatus of the present embodiment described above, when the fuel concentration Df in the receiving chamber 19 detected by the fuel concentration sensor 43 is lower than the predetermined set value D1, the ECU 40 causes the fifth The valve 35 is opened, the receiving chamber 19 communicates with the atmosphere through the air pipe 22, and the internal pressure of the receiving chamber 19 decreases to atmospheric pressure. Therefore,
Receiving room 1 as much as the internal pressure of receiving room 19 drops to atmospheric pressure
The vapor receiving capacity at 9 is increased. Therefore, when the receiving chamber 19 is closed again, a large amount of vapor can be received in the receiving chamber 19 again, and the vapor collecting capability of this device can be enhanced. In addition, as the vapor receiving capacity of the receiving chamber 19 increases as described above,
The removability of vapor from the canister 6 is improved. Also in this sense, the regeneration of the canister 6 can be speeded up, and the canister 6 can be downsized.

Here, when the receiving chamber 19 communicates with the atmosphere through the air pipe 22, there is a problem that the vapor in the receiving chamber 19 escapes to the outside. However, in this device, when the fuel concentration Df in the receiving chamber 19 is monitored by the fuel concentration sensor 43 as described above, when the fuel concentration Df is lower than a level (set value D1) at which air pollution does not pose a problem. Only the receiving chamber 19 is in communication with the atmosphere. Therefore, even if the internal pressure of the receiving chamber 19 is released to the atmosphere, the vapor concentration in the atmosphere is sufficiently low, so that air pollution does not pose a problem.

Besides, according to the evaporated fuel recovery apparatus of the present embodiment, it is possible to obtain the same operation and effect as the evaporated fuel recovery apparatus of the first embodiment.

[Third Embodiment] A third embodiment of the fuel vapor recovery system of the present invention will be described below with reference to the drawings.

FIG. 6 shows a schematic block diagram of an evaporated fuel recovery system according to the present embodiment. In this embodiment, the bypass passage 16 and the third valve 33 are eliminated, and an internal pressure introducing pipe 23 is provided between the receiving chamber 19 of the liquefier 9 and the atmosphere chamber 13 of the canister 6, and the pipe 23 is of an electromagnetic type. The sixth valve 36 is provided, and the fuel concentration sensor 43 is provided in the receiving chamber 19, which is a difference from the first embodiment. Here, the internal pressure introducing pipe 23 is for introducing the internal pressure of the receiving chamber 19 into the atmosphere chamber 13 of the canister 6 as a back pressure, and the sixth valve 36 selectively opens and closes the pipe 23. Is. Both 23 and 36 constitute the internal pressure introducing means of the present invention. The ECU 40 opens the sixth valve 36 according to the state of the vapor in the receiving chamber 19 (here, according to the difference in the fuel concentration Df reflecting the vapor amount). ECU 40 that executes this control
Corresponds to the internal pressure introduction control means of the present invention.

Next, the processing contents of the vapor recovery control executed by the ECU 40 will be described with reference to the flowchart of FIG. In the flowchart of FIG. 7, step 141 in FIG. 2 is replaced with step 241, step 150 is replaced with step 350, step 152 is replaced with step 352, and step 170 is replaced with step 370. The contents are different.

That is, in the flowchart of FIG. 7, when the value of the receiving room pressure Pu is higher than the predetermined set value p2 in step 131, the ECU 40 stops the suction pump 8 and turns off the heater 14 in step 140. After that, in step 241, the ECU 40 determines whether the fuel concentration Df detected by the fuel concentration sensor 43 is lower than a predetermined set value D1. Here, as the predetermined set value D1, a value of the fuel concentration Df at which the air pollution does not pose a problem even if the vapor is discharged to the atmosphere may be applied. If the determination result is negative, the ECU 40 proceeds to step 140
Then, the processing of steps 140 and 241 is repeated. If the determination result is affirmative, the ECU 40 shifts the processing to steps 350 and 160, and performs a series of processing of steps 350, 151, and 352, and step 16
A series of processing from 0 to 165 is executed in parallel.

Here, in step 350, the ECU 40
Opens the sixth valve 36. As a result, the receiving room 19
Is introduced into the atmosphere chamber 13 of the canister 6 through the internal pressure introducing pipe 23, and the receiving chamber pressure Pu decreases.

Then, in step 151, the ECU 40
Determines whether the value of the receiving room pressure Pu is equal to the normal pressure value (atmospheric pressure value) P0. If the determination result is negative, the ECU 40 returns the process to step 350 and repeats the processes of steps 350 and 151. If the determination result is affirmative, the ECU 40 closes the sixth valve 36 in step 352. As a result, the introduction of the internal pressure of the receiving chamber 19 into the canister 6 is stopped. After that, in order to restart the acceptance of the vapor from the canister 6 into the receiving chamber 19, the ECU 40 returns the process to step 130 and repeats the processes of step 130 and the subsequent steps.

On the other hand, in step 370 after shifting from steps 100 and 110, the ECU 40 opens the first and second valves 31 and 32 and opens the fourth and sixth valves 34 and 34.
By closing 36, each valve 31, 32, 34,
Initialize 36.

Here, the internal pressure of the receiving chamber 19 is set to the canister 6
It was introduced into the atmosphere chamber 13 instead of the vapor chamber 12 for the following reason. That is, the vapor adsorption concentration in the adsorbent 11 of the canister 6 is higher in the portion closer to the vapor chamber 12 side than in the portion closer to the atmosphere chamber 13 side. Here, reception room 1
When the internal pressure of 9 is introduced into the vapor chamber 12, the adsorbent 11
The vapor adsorbed on is moved toward the atmosphere chamber 13 side by the action of the internal pressure introduced, and is separated from the vapor chamber 12. For this reason, when the vapor is sucked out of the canister 6 by the action of the suction pump 8, the desorption efficiency of the vapor from the adsorbent 11 tends to deteriorate. On the contrary,
When the internal pressure of the receiving chamber 19 is introduced into the atmospheric chamber 13, the vapor adsorbed by the adsorbent 11 moves to the vapor chamber 12 side due to the action of the introduced internal pressure, and approaches the vapor chamber 12. Therefore, when the vapor is sucked from the canister 6 by the operation of the suction pump 8, the efficiency of desorbing the vapor from the adsorbent 11 is improved. For this reason, the internal pressure in the receiving chamber 19 of the liquefaction device 9 is reduced to the atmospheric chamber 1 of the canister 6.
It is introduced in 3.

According to the fuel vapor recovery apparatus of the present embodiment described above, when the fuel concentration Df in the receiving chamber 19 detected by the fuel concentration sensor 43 becomes lower than the predetermined set value D1, the ECU 40 As a result, the sixth valve 36 is opened, the internal pressure of the receiving chamber 19 is introduced as a back pressure into the atmospheric chamber 13 of the canister 6 through the internal pressure introducing pipe 23, and the internal pressure of the receiving chamber 19 decreases. Therefore, the vapor collected in the adsorbent 11 is pushed by the back pressure introduced into the atmosphere chamber 13 and moves toward the vapor chamber 12, and the desorption from the adsorbent 11 is promoted. Therefore, the canister 6
Can be easily regenerated, and the vapor collecting ability of the canister 6 can be enhanced. In this sense, the canister 6 can be downsized. Also, the reception room 19
The vapor receiving capacity of the receiving chamber 19 increases as much as the internal pressure of the above is introduced into the canister 6. Therefore, the vapor recovery capacity of this device can be enhanced.

In addition to this, the evaporated fuel recovery apparatus of the present embodiment can also obtain the same operation and effect as the evaporated fuel recovery apparatus of the first embodiment.

The present invention is not limited to the above-mentioned embodiments, but can be carried out as follows within the scope of the invention.

(1) In each of the above-described embodiments, the heater 14 is provided in the canister 6 so that the heater 1 can be used when sucking vapor.
Although the heater 4 is operated to heat the adsorbent 11, the heater 14 may be omitted.

(2) In the third embodiment, the fuel concentration sensor 4 is operated at step 241 in the flowchart of FIG.
After waiting for the fuel concentration Df detected by 3 to become lower than the predetermined set value D1, the sixth valve 36 is opened in step 350, and the receiving chamber pressure Pu is changed to the normal pressure P in step 151.
The sixth valve 36 was closed after it reached 0. On the other hand, the sixth valve 36 is opened after waiting for the receiving chamber pressure Pu to reach a predetermined set value or for waiting a predetermined time after stopping the suction pump 8.
After that, the sixth valve 36 may be closed after waiting a predetermined time.

[0093]

According to the configuration of the invention described in claim 1,
The purgeless system does not need to particularly enhance the pressure resistance of the fuel tank, and the evaporated fuel collected in the canister can be efficiently liquefied and effectively collected in the fuel tank. At the same time, the regeneration capacity of the canister associated with the separation of the evaporated fuel can be increased.

According to the configuration of the invention described in claim 2, in addition to the effect of the invention described in claim 1, the separated fuel component can be liquefied in a relatively short time and can be fed to the receiving chamber. The acceptance of new evaporated fuel can be promoted. At the same time, the fuel component in the evaporated fuel can be efficiently liquefied by the liquefying means, and the liquefied fuel component can be promptly recovered in the fuel tank.

According to the structure of the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is not necessary to design the closed container including the receiving chamber to have a pressure resistance higher than necessary. It is possible to simplify the pressure resistant structure related to the closed container.

According to the configuration of the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3,
When the receiving chamber is closed again, a large amount of evaporated fuel can be received again in the receiving chamber, and the ability to collect evaporated fuel can be improved. In this sense, regeneration of the canister can be speeded up, and the canister can be downsized.

According to the configuration of the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4,
The canister can be easily regenerated, and the ability of the canister to collect evaporated fuel can be enhanced. In this sense, the canister can be downsized. At the same time, the ability to recover evaporated fuel can be improved.

According to the configuration of the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5,
The evaporative fuel remaining in the receiving chamber is prevented from accidentally leaking to the outside, and the canister can be prepared for collecting new evaporative fuel.

According to the configuration of the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6,
The evaporative fuel can be sucked out from the canister as much as the amount heated by the heating means, and the regeneration of the canister can be promoted.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an evaporated fuel recovery device according to a first embodiment.

FIG. 2 is likewise a flow chart showing the processing contents of vapor recovery control.

FIG. 3 is likewise a time chart showing the behavior of the receiving chamber pressure.

FIG. 4 is a schematic configuration diagram showing an evaporated fuel recovery device according to a second embodiment.

FIG. 5 is a flowchart showing the processing details of vapor recovery control.

FIG. 6 is a schematic configuration diagram showing an evaporated fuel recovery device according to a third embodiment.

FIG. 7 is a flowchart showing the processing content of vapor recovery control in the same manner.

FIG. 8 is a schematic configuration diagram showing a conventional evaporated fuel recovery device.

[Explanation of symbols]

2 fuel tank 6 canisters 7 Suction line 8 suction pump 9 liquefier 10 collection line 11 Adsorbent 12 Vapor room 13 atmosphere room 14 Heater (heating means) 16 bypass passage 17 Airtight container 18 Separation membrane 19 Reception room 20 Liquefaction chamber 21 Cooler (cooling means) 22 Air pipe 23 Internal pressure introduction pipe 33 Third valve 34 Fourth Valve 35 Fifth Valve 36 6th valve 40 ECU 41 first pressure sensor (tank internal pressure detection means) 42 Second pressure sensor (receiving room pressure detection means) 43 Fuel concentration sensor (fuel concentration detection means)

[Procedure amendment]

[Submission date] May 23, 2002 (2002.5.2)
3)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

The canister 6 is an adsorbent 1 made of activated carbon.
Built-in 1. The interior of the canister 6 is divided into a vapor chamber 12 and an atmosphere chamber 13 with the adsorbent 11 as a boundary. Adsorbent 1
Inside 1, there is provided a heater 14 for heating the vapor collected therein. The heater 14 is composed of pressurized heat element device, which corresponds to the heating means of the present invention. The vapor from the vapor line 5 is received in the vapor chamber 12. The atmosphere chamber 13 can communicate with the atmosphere via an air pipe 15. In the middle of the vapor line 5, the same line 5
An electromagnetic first valve 31 for opening and closing is provided. The air pipe 15 is provided with an electromagnetic second valve 32 for opening and closing the passage 15.

Claims (7)

[Claims] 1. A canister for collecting evaporated fuel generated in a fuel tank, a suction means for sucking the collected evaporated fuel from the canister, and a fuel component of the sucked evaporated fuel. In an evaporative fuel recovery device that includes a liquefying means for liquefying and recovers the liquefied fuel component to the fuel tank, the liquefying means includes a closed container and a separation membrane provided inside the closed container. A receiving chamber and a liquefying chamber that are partitioned by the separation membrane, and the evaporative fuel is sucked into the receiving chamber and is allowed to pass through the separation membrane, thereby converting the evaporative fuel into air and fuel components. An evaporated fuel recovery device, characterized in that it is separated and the separated fuel component is condensed and liquefied in the liquefaction chamber. 2. A tank internal pressure detecting means for detecting an internal pressure of the fuel tank, a cooling means provided in the liquefaction chamber for cooling the separated fuel component, and the fuel tank from the liquefaction chamber. Recovery adjusting means for adjusting the flow of the liquefied fuel component recovered to the cooling means, and the cooling means for cooling the separated fuel component when the detected internal pressure of the fuel tank is lower than a predetermined set value. And a recovery control means for controlling the recovery adjusting means for recovering the liquefied fuel component to the fuel tank, the evaporated fuel recovery device according to claim 1. 3. Receiving chamber pressure detecting means for detecting the internal pressure of the receiving chamber, and when the detected internal pressure of the receiving chamber is lower than a predetermined set value, the evaporated fuel is sucked out from the canister and the receiving chamber is received. The evaporative fuel recovery system according to claim 1 or 2, further comprising: an evacuation control means for controlling the evacuation means to be received in the chamber. 4. A fuel concentration detecting means for detecting the fuel concentration in the receiving chamber, an atmosphere communication adjusting means for controlling the communication of the receiving chamber with the atmosphere, and the detected fuel concentration. When lower than the preset value,
4. The evaporated fuel recovery apparatus according to claim 1, further comprising an atmosphere communication control unit that controls the atmosphere communication adjusting unit to reduce the internal pressure of the receiving chamber. 5. An internal pressure introducing means for introducing the internal pressure of the receiving chamber into the canister as a back pressure, and an internal pressure introducing control means for controlling the internal pressure introducing means according to the state of evaporated fuel in the receiving chamber. The evaporated fuel recovery apparatus according to any one of claims 1 to 4, further comprising: 6. A return adjusting means for adjusting the return of the evaporated fuel from the receiving chamber to the canister, and the canister from the receiving chamber when the evaporated fuel is not sucked out by the sucking means. Return control means for controlling the return adjusting means so as to restrict the return of the evaporated fuel from the receiving chamber to the canister when sucking the evaporated fuel is permitted. The evaporated fuel recovery apparatus according to any one of claims 1 to 5, further comprising: 7. A heating means for heating the vaporized fuel collected in the canister, and a heating means for heating the vaporized fuel when the vaporized fuel is sucked out by the suction means. The evaporated fuel recovery apparatus according to any one of claims 1 to 6, further comprising: a heating control unit that controls the evaporated fuel.