JP5410365B2 - Evaporation feeder - Google Patents

Description

  The present invention relates to an evaporation supply device that supplies evaporation, which is evaporated fuel generated in a fuel tank of an internal combustion engine (hereinafter referred to as “engine”), to an intake system.

  Evaporation occurs in the fuel tank of the internal combustion engine. Such evaporation is supplied to the intake system, and improves the startability of the engine, for example. 2. Description of the Related Art Conventionally, there has been proposed an apparatus configured to hold a fuel tank at a positive pressure and supply the fuel tank evaporation to an intake system having a negative pressure (see, for example, Patent Document 1).

JP-A-2005-90281

  However, in the invention described in Patent Document 1, since the evaporation is supplied from the fuel tank disposed at a position relatively far from the intake pipe, there is a possibility that the evaporation supply may be delayed. Further, at the time of starting, there is a possibility that a sufficient negative pressure is not generated in the intake pipe and a sufficient amount of evaporation is not supplied.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an evaporation supply apparatus that can rapidly supply an evaporation and supply a sufficient amount of evaporation.

In the evaporation supply device according to claim 1 or 3 made to achieve the above-described object, the evaporation as the evaporated fuel generated in the fuel tank is guided to the storage pipe and stored in the storage tank. The evaporation stored in the storage tank is supplied to the intake passage through the supply pipe.

  Since the storage tank for storing the evaporation is provided as described above, for example, if the storage tank is arranged at a position close to the intake passage, the evaporation can be supplied more quickly than the configuration in which the evaporation is supplied from the fuel tank or the canister.

In addition, the control unit executes a pipeline shutoff process, a pressure increase process, and a supply process.
In the pipeline shut-off process, the pipeline of the storage pipe is shut off by the storage valve and the pipeline of the supply pipe is shut off by the supply valve. As a result, the evaporation is confined in the storage tank.

The pressure increasing process is to increase the internal pressure of the storage tank by introducing a gas from the pressurizing pipe after the pipe line blocking process.
For example, the inside of the storage tank may be a single room. In this case, the pressure increases in a state where the evaporation and the gas are mixed.

Further, for example, as shown in claim 5 , the interior of the storage tank may be configured such that an evaporation chamber for storing the evaporation and a gas chamber into which gas from the pressurization pipe is introduced are partitioned by a partition wall. In this case, the partition wall swells to the evaporation chamber side due to the pressure increase in the gas chamber, and the pressure in the evaporation chamber increases.

In the supply process, after the pressure increase process, the supply pipe is opened by a supply valve to supply the evaporation to the intake passage using the internal pressure.
If it does in this way, sufficient quantity of evaporation can be supplied by the pressure rise of a storage tank.

Incidentally, pressurizing pipe, for example as shown in claim 1, it is considered to be an exhaust gas pipe which connects the exhaust passage and a reservoir tank. In this case, exhaust gas is introduced into the storage tank to increase the internal pressure of the storage tank. In this way, the pressure in the storage tank can be increased with a simple configuration.

Furthermore, as shown in claim 2 , an exhaust shutter that closes the exhaust passage may be provided on the downstream side of the exhaust gas pipe. In this case, the control unit closes the exhaust passage with the exhaust shutter when the exhaust is introduced from the exhaust gas pipe. In this way, since the exhaust passage is closed downstream of the exhaust gas pipe, most of the exhaust gas flows into the exhaust gas pipe, and the pressure of the storage tank can be quickly increased.

Also, pressurization piping is considered to be a suction pipe which connects the storage tank and upstream of the intake passage from the throttle valve downstream from the example as shown in claim 3, supercharger . In this case, intake air is introduced into the storage tank to increase the internal pressure of the storage tank. In this way, the pressure in the storage tank can be increased with a simple configuration.

In this case, as shown in claim 4 , the control unit may block the intake passage with a throttle valve when introducing the intake air from the intake pipe. In this way, since the intake passage is closed downstream of the intake pipe, most of the intake air flows into the intake pipe, and the pressure of the storage tank can be quickly increased.

By the way, it is effective to supply such evaporation when the engine is started. Therefore, as shown in claim 6 , when the control unit determines that there is a request for starting the engine, it can be considered that the supply process is executed. In this way, a sufficient amount of evaporation can be supplied quickly when the engine is started.

Assuming that the evaporative supply is performed at such timing, as shown in claim 7 , when the control unit determines that the fuel injection from the injector has been cut, the control unit executes the pipeline shutoff process and the pressure increase process. It is good to do. In this way, it contributes to rapid evaporation supply.

It is explanatory drawing which shows the evaporation supply apparatus of 1st Embodiment. It is a flowchart which shows a canister purge process. It is a flowchart which shows the evaporation supply process of 1st Embodiment. It is explanatory drawing which shows the evaporation supply apparatus of 2nd Embodiment. It is a flowchart which shows the evaporation supply process of 2nd Embodiment.

(First embodiment)
FIG. 1 is an explanatory view schematically showing a gasoline engine. As shown in FIG. 1, the gasoline engine includes an engine body 10, an intake system 20, an exhaust system 30, an evaporation supply device, and the like.

  The engine body 10 has a spark plug 11, a cylinder 12, and a piston 13. The piston 13 is supported by the cylinder 12 so as to be able to reciprocate, and forms a combustion chamber 14 in the upper part thereof. Although the engine body 10 has a plurality of cylinders 12, only one is shown in FIG. 1 for convenience. The engine body 10 has an intake valve 15 and an exhaust valve 16. Furthermore, the engine main body 10 has an injector 17 for injecting fuel into the combustion chamber 14.

  The intake system 20 has an intake pipe 21. The intake pipe 21 has an intake port 22 at one end and is open to the outside air. The other end is connected to the engine body 10. The intake pipe 21 forms an intake passage 23 that connects the intake port 22 and the combustion chamber 14 of the engine body 10. In the intake passage 23, an air cleaner 24, a throttle valve 25, and the like are provided in order from the upstream side. The most downstream side of the intake passage 23 is opened and closed by the intake valve 15 described above.

  The exhaust system 30 has an exhaust pipe 31. One end of the exhaust pipe 31 is connected to the engine body 10. The other end is an exhaust port (not shown), and is open to the outside air. The exhaust pipe 31 forms an exhaust passage 32 that connects the combustion chamber 14 of the engine body 10 and the exhaust port. The exhaust passage 32 is provided with an exhaust shutter 33 for closing the exhaust passage 32.

  The evaporation supply device is for supplying evaporation, which is evaporated fuel generated in the fuel tank 40, to the intake passage 23. The evaporation supply system is provided with a canister 50 that adsorbs the evaporation, and a storage tank 60 is provided downstream of the canister 50. The evaporation supply device is configured around the storage tank 60 and the ECU 70.

  The storage tank 60 has a partition wall 61 and is partitioned by the partition wall 61 into an evaporation chamber 62 in which evaporation is stored and a gas chamber 63 in which exhaust is stored. The partition wall 61 expands due to a pressure difference between the evaporation chamber 62 and the gas chamber 63. FIG. 1 shows a state in which the partition wall 61 swells to the evaporation chamber 62 side. The evaporation chamber 62 is provided with a pressure sensor 64 that detects the fuel vapor pressure.

A storage pipe 81, a supply pipe 82, and an exhaust gas pipe 83 are connected to the storage tank 60.
The storage pipe 81 is a pipe that connects the canister 50 to the evaporation chamber 62, and guides the evaporation to the evaporation chamber 62. A storage valve 84 is provided in the middle of the storage pipe 81.

  The supply pipe 82 is a pipe connecting the evaporation chamber 62 to the intake passage 23, and guides the evaporation in the evaporation chamber 62 to the intake passage 23. A supply valve 85 is provided in the middle of the supply pipe 82.

  The exhaust gas pipe 83 is a pipe connecting the exhaust passage 32 to the gas chamber 63, and guides the exhaust gas in the exhaust passage 32 to the gas chamber 63. In particular, the exhaust gas pipe 83 is provided on the upstream side of the exhaust shutter 33 described above. Thereby, exhaust gas is guided to the gas chamber 63 by the exhaust gas pipe 83 by closing the exhaust shutter 33. A pressure valve 86 is provided in the middle of the exhaust gas pipe 83.

  The ECU 70 is configured as a computer system, and various signals are input to the ECU 70 including the signal from the pressure sensor 64 described above. The ECU 70 executes canister purge processing and evaporation supply processing, and opens and closes the exhaust shutter 33, the storage valve 84, the supply valve 85, and the pressure valve 86.

Here, the canister purge process will be described based on the flowchart of FIG.
In the first S100, it is determined whether or not a canister purge guard condition is satisfied. This guard condition is determined based on, for example, the evaporation concentration and the evaporation flow rate. If it is determined that the guard condition is not satisfied (S100: NO), the storage valve 84 and the supply valve 85 are opened in S110, and then the canister purge process is terminated. When the storage valve 84 and the supply valve 85 are opened in S110, the evaporation from the canister 50 is supplied to the intake passage 23 via the evaporation chamber 62. On the other hand, when it is determined that the guard condition is satisfied (S100: YES), the storage valve 84 and the supply valve 85 are closed in S120, and the canister purge process is ended.

  Such a canister purge process is repeatedly performed during operation. Normally, since the guard condition is not satisfied, the evaporation purge from the canister 50 is always performed.

  Next, the evaporation supply process will be described based on the flowchart of FIG. This evaporation supply process is repeatedly executed.

  In first S200, it is determined whether or not the injection is being cut. For example, when the accelerator opening is equal to or smaller than a predetermined opening, the ECU 70 stops fuel injection from the injector 17. If it is determined that the injection is being cut (S200: YES), the process proceeds to S210. On the other hand, if it is determined that the injection is not being cut (S200: NO), the subsequent processing is not executed and the evaporation supply processing is terminated. When the evaporation supply process is thus completed, the evaporation supply process is executed next, and the process is executed from S200.

  In S210, the storage valve 84 and the supply valve 85 are closed. In subsequent S220, the exhaust shutter 33 is closed. In the next S230, the pressure valve 86 is opened. As a result, the exhaust gas is guided from the exhaust passage 32 to the gas chamber 63 via the exhaust gas pipe 83. As a result, the pressure in the gas chamber 63 rises and the partition wall 61 swells toward the evaporation chamber 62, so that the pressure in the evaporation chamber 62 rises.

  In next step S240, it is determined whether or not the fuel vapor pressure is larger than a predetermined value α. The vaporized fuel pressure here is the pressure in the evaporation chamber 62. This evaporated fuel pressure is detected by the pressure sensor 64. If it is determined that the fuel vapor pressure> α (S240: YES), the process proceeds to S250. On the other hand, when it is determined that the fuel vapor pressure ≦ α (S240: NO), the subsequent process is not executed and the evaporation supply process is terminated.

  In S250, the exhaust shutter 33 is opened. In subsequent S260, the pressure valve 86 is closed. Thereby, the pressure of the gas chamber 63 is held. As a result, the pressure in the evaporation chamber 62 is also maintained.

  In S270, it is determined whether or not an engine start request has been made. When the injection cut is performed (S200: YES), in the vehicle that performs idle stop, the engine may be stopped thereafter. On the premise of such an engine stop, it is determined whether or not an engine start request has been made. If it is determined that there is a start request (S270: YES), the supply valve 85 is opened in S280, and the process proceeds to S290. On the other hand, when there is no start request (S270: NO), the subsequent process is not executed and the evaporation supply process is terminated. In this case, once the process is completed, the processes from S200 are repeated.

  In S290 following S280, it is determined whether or not the engine has been started. If it is determined that the engine has been started (S290: YES), the supply valve 85 is closed in S300, and the evaporation supply process is terminated. On the other hand, while it is not started (S290: NO), the determination process of S290 is repeated.

Next, the effect which the evaporation supply apparatus of this embodiment exhibits is demonstrated.
In the present embodiment, the evaporation generated in the fuel tank 40 is guided to the storage pipe 81 and stored in the storage tank 60. The evaporation stored in the storage tank 60 is supplied to the intake passage 23 through the supply pipe 82.

  Since the storage tank 60 for storing the evaporation is provided at a position close to the intake passage 23 as described above, the evaporation can be supplied more quickly than the configuration in which the evaporation is supplied from the fuel tank 40 or the canister 50.

  In this embodiment, when the injection is being cut (S200 in FIG. 3: YES), the storage valve 84 and the supply valve 85 are closed (S210), the exhaust shutter 33 is closed (S220), and the pressure valve 86 is turned on. Open (S230). As a result, the exhaust gas in the exhaust passage 32 is guided to the gas chamber 63 of the storage tank 60 via the exhaust gas pipe 83.

  When the pressure in the gas chamber 63 increases, the partition wall 61 swells toward the evaporation chamber 62 and the pressure in the evaporation chamber 62 increases. When the fuel vapor pressure exceeds the predetermined value α (S240 in FIG. 3: YES), the exhaust shutter 33 is opened (S250), and the pressure valve 86 is closed (S260). When there is a request for starting the engine (S270: YES), the supply valve 85 is opened (S280). As a result, the evaporation is supplied from the evaporation chamber 62 of the storage tank 60 to the intake passage 23.

  That is, in this embodiment, exhaust gas is introduced into the storage tank 60 to increase the internal pressure of the storage tank 60. Thereby, a sufficient amount of evaporation can be supplied by the pressure increase of the storage tank 60.

  In the present embodiment, the pressure of the storage tank 60 is increased with a relatively simple configuration in which exhaust gas is introduced into the storage tank 60. Further, when exhaust gas is introduced from the exhaust gas pipe 83, the exhaust passage 32 is closed by the exhaust shutter 33. As a result, the exhaust passage 32 is closed on the downstream side of the exhaust gas pipe 83, so that most of the exhaust gas flows into the exhaust gas pipe 83, and the pressure of the storage tank 60 can be quickly increased.

  Furthermore, in this embodiment, when there is a request for starting the engine (S270 in FIG. 3), the supply valve 85 is opened (S280), and the evaporation is supplied when the engine is started. As a result, a sufficient amount of evaporation can be supplied quickly when the engine is started.

  Moreover, when it is determined that the fuel injection by the injector 17 is cut (S200: YES in FIG. 3), the pressure valve 86 is opened (S230), and the evaporated fuel pressure is maintained at a predetermined value α or more (S240). : YES, S260). This contributes to rapid evaporation supply when there is a subsequent engine start request.

  In this embodiment, the storage pipe 81 corresponds to the “storage pipe” described in [Claims], the storage valve 84 corresponds to the “storage valve”, and the storage tank 60 corresponds to the “storage tank”. The partition wall 61 corresponds to the “partition wall”, the evaporation chamber 62 corresponds to the “evaporation chamber”, the gas chamber 63 corresponds to the “gas chamber”, and the supply pipe 82 corresponds to the “supply pipe”. The supply valve 85 corresponds to the “supply valve”, the exhaust gas pipe 83 corresponds to the “pressurization pipe” and the “exhaust gas pipe”, the exhaust shutter 33 corresponds to the “exhaust shutter”, and the pressure valve 86. Corresponds to a “pressure valve”, and the ECU 70 corresponds to a “control unit”.

  Further, the process of S210 in FIG. 3 corresponds to the “pipe line blocking process”, the processes of S230, S240, and S260 correspond to the “pressure increase process”, and the process of S280 corresponds to the “supply process”.

(Second Embodiment)
FIG. 4 is an explanatory view schematically showing a gasoline engine. As shown in FIG. 4, the gasoline engine includes an engine body 10, an intake system 20, an exhaust system 30, an evaporation supply device, and the like. In addition, about the structure similar to the said embodiment, in order to avoid becoming complicated, the same code | symbol is used and description is omitted suitably.

  The engine body 10 includes a spark plug 11, a cylinder 12, and a piston 13 as in the above embodiment. The engine body 10 has an intake valve 15 and an exhaust valve 16. Furthermore, the engine main body 10 has an injector 17 for injecting fuel into the combustion chamber 14.

  The intake system 20 and the exhaust system 30 are basically the same as in the above embodiment. However, the gasoline engine of this embodiment differs from the said embodiment by the point which has the supercharger 90. FIG.

  The intake system 20 has an intake pipe 21. The intake pipe 21 has an intake port 22 at one end and is open to the outside air. The other end is connected to the engine body 10. The intake pipe 21 forms an intake passage 23 that connects the intake port 22 and the combustion chamber 14 of the engine body 10. In the intake passage 23, an air cleaner 24, a throttle valve 25, and the like are provided in order from the upstream side. The most downstream side of the intake passage 23 is opened and closed by the intake valve 15 described above.

  The exhaust system 30 has an exhaust pipe 31. One end of the exhaust pipe 31 is connected to the engine body 10. The other end is an exhaust port (not shown), and is open to the outside air. The exhaust pipe 31 forms an exhaust passage 32 that connects the combustion chamber 14 of the engine body 10 and the exhaust port. In the present embodiment, an exhaust shutter for closing the exhaust passage 32 is not provided.

  And as above-mentioned, the supercharger 90 is provided in this embodiment. The supercharger 90 includes a compressor 91 disposed in the intake passage, and a turbine 92 that rotates integrally with the compressor 91 and disposed in the exhaust passage 32. Here, an intercooler 26 is arranged in the intake passage 23 on the downstream side of the compressor 91.

  Similar to the above-described embodiment, the evaporation supply apparatus is configured around the storage tank 60 and the ECU 70.

  The storage tank 60 has a partition wall 61 and is partitioned by the partition wall 61 into an evaporation chamber 62 in which evaporation is stored and a gas chamber 63 in which exhaust is stored. The partition wall 61 expands due to a pressure difference between the evaporation chamber 62 and the gas chamber 63. FIG. 4 shows a state in which the partition wall 61 swells to the evaporation chamber 62 side. The evaporation chamber 62 is provided with a pressure sensor 64 that detects the fuel vapor pressure.

A storage pipe 81, a supply pipe 82, and an intake pipe 87 are connected to the storage tank 60.
The storage pipe 81 is a pipe that connects the canister 50 to the evaporation chamber 62, and guides the evaporation to the evaporation chamber 62. A storage valve 84 is provided in the middle of the storage pipe 81.

  The supply pipe 82 is a pipe connecting the evaporation chamber 62 to the intake passage 23, and guides the evaporation in the evaporation chamber 62 to the intake passage 23. A supply valve 85 is provided in the middle of the supply pipe 82.

  The intake pipe 87 replaces the exhaust gas pipe 83 (see FIG. 1) of the above embodiment. The intake pipe 87 is a pipe connecting the intake passage 23 to the gas chamber 63, and guides the intake air in the intake passage 23 to the gas chamber 63. In particular, the intake pipe 87 is provided on the upstream side of the throttle valve 25. As a result, the intake valve 87 guides the intake air to the gas chamber 63 by closing the throttle valve. A pressure valve 88 is provided in the middle of the intake pipe 87.

  The ECU 70 is configured as a computer system, and various signals are input to the ECU 70 including the signal from the pressure sensor 64 described above. The ECU 70 performs a canister purge process and an evaporation supply process, and opens and closes the storage valve 84, the supply valve 85, and the pressure valve 88.

Since the canister purge process is the same as that of the above embodiment, the description is omitted.
Next, the evaporation supply process will be described based on the flowchart of FIG. This evaporation supply process is the same process as the evaporation supply process of the above embodiment, and is repeatedly executed.

  In first S400, it is determined whether or not the injection is being cut. If it is determined that the injection is being cut (S400: YES), the process proceeds to S410. On the other hand, when it is determined that the injection is not being cut (S400: NO), the subsequent process is not executed and the evaporation supply process is terminated.

  In S410, the storage valve 84 and the supply valve 85 are closed. In subsequent S420, the throttle valve 25 is closed. In the next S430, the pressure valve 86 is opened. As a result, the intake air is guided from the intake passage 23 to the gas chamber 63 via the intake pipe 87. As a result, the pressure in the gas chamber 63 rises and the partition wall 61 swells toward the evaporation chamber 62, so that the pressure in the evaporation chamber 62 rises.

  In next step S440, it is determined whether or not the fuel vapor pressure is larger than a predetermined value α. The vaporized fuel pressure here is the pressure in the evaporation chamber 62. This evaporated fuel pressure is detected by the pressure sensor 64. If it is determined that the evaporated fuel pressure> α (S440: YES), the process proceeds to S450. On the other hand, when it is determined that the fuel vapor pressure ≦ α (S440: NO), the subsequent process is not executed and the evaporation supply process is terminated.

  In S450, the throttle valve 25 is opened. In subsequent S460, the pressure valve 88 is closed. Thereby, the pressure of the gas chamber 63 is held. As a result, the pressure in the evaporation chamber 62 is also maintained.

  In S470, it is determined whether or not an engine start request has been made. If it is determined that a start request has been made (S470: YES), the supply valve 85 is opened in S480, and the process proceeds to S490. On the other hand, when there is no start request (S470: NO), the subsequent process is not executed and the evaporation supply process is terminated.

  In S490 following S480, it is determined whether or not the engine has been started. If it is determined that the engine has started (S490: YES), the supply valve 85 is closed in S500, and the evaporation supply process is terminated. On the other hand, while the engine is not started (S490: NO), the determination process of S490 is repeated.

Next, the effect which the evaporation supply apparatus of this embodiment exhibits is demonstrated.
Also in this embodiment, the same effect as the above-mentioned embodiment is produced. For example, the evaporation generated in the fuel tank 40 is guided to the storage pipe 81 and stored in the storage tank 60. The evaporation stored in the storage tank 60 is supplied to the intake passage 23 through the supply pipe 82. Since the storage tank 60 for storing the evaporation is provided at a position close to the intake passage 23 as described above, the evaporation can be supplied more quickly than the configuration in which the evaporation is supplied from the fuel tank 40 or the canister 50.

  In this embodiment, when the injection is being cut (S400 in FIG. 5: YES), the storage valve 84 and the supply valve 85 are closed (S410), the throttle valve 25 is closed (S420), and the pressure valve 88 is turned on. Open (S430). As a result, the intake air in the intake passage 23 is guided to the gas chamber 63 of the storage tank 60 via the intake pipe 87.

  When the pressure in the gas chamber 63 increases, the partition wall 61 swells toward the evaporation chamber 62 and the pressure in the evaporation chamber 62 increases. When the fuel vapor pressure exceeds the predetermined value α (S440 in FIG. 5: YES), the throttle valve 25 is opened (S450) and the pressure valve 88 is closed (S460). When there is a request for starting the engine (S470: YES), the supply valve 85 is opened (S480). As a result, the evaporation is supplied from the evaporation chamber 62 of the storage tank 60 to the intake passage 23.

  That is, in the present embodiment, the intake air is introduced into the storage tank 60 by using the supercharger 90, and the internal pressure of the storage tank 60 is increased. Thereby, a sufficient amount of evaporation can be supplied by the pressure increase of the storage tank 60.

  In the present embodiment, the pressure in the storage tank 60 is increased with a relatively simple configuration in which the intake air is introduced into the storage tank 60. Further, when intake air is introduced from the intake pipe 87, the intake passage 23 is closed by the throttle valve 25. As a result, the intake passage 23 is closed on the downstream side of the intake pipe 87, so that most of the intake air flows into the intake pipe 87, and the pressure in the storage tank 60 can be quickly increased.

  Furthermore, in the present embodiment, when there is a request for starting the engine (S470 in FIG. 5), the supply valve 85 is opened (S480), and the evaporation is supplied when the engine is started. As a result, a sufficient amount of evaporation can be supplied quickly when the engine is started.

  Moreover, when it is determined that the fuel injection by the injector 17 is cut (S400: YES in FIG. 5), the pressure valve 86 is opened (S430), and the fuel vapor pressure is maintained at a predetermined value α or more (S440). : YES, S460). This contributes to rapid evaporation supply when there is a subsequent engine start request.

  In this embodiment, the storage pipe 81 corresponds to the “storage pipe” described in [Claims], the storage valve 84 corresponds to the “storage valve”, and the storage tank 60 corresponds to the “storage tank”. The partition wall 61 corresponds to the “partition wall”, the evaporation chamber 62 corresponds to the “evaporation chamber”, the gas chamber 63 corresponds to the “gas chamber”, and the supply pipe 82 corresponds to the “supply pipe”. The supply valve 85 corresponds to the “supply valve”, the intake pipe 87 corresponds to the “pressurization pipe” and the “intake pipe”, the throttle valve 25 corresponds to the “throttle valve”, and the pressure valve 88. Corresponds to a “pressure valve”, and the ECU 70 corresponds to a “control unit”.

  Further, the process of S410 in FIG. 3 corresponds to the “pipe line blocking process”, the processes of S430, S440, and S460 correspond to the “pressure increase process”, and the process of S480 corresponds to the “supply process”.

  As mentioned above, this invention is not limited to the said embodiment at all, In the range which does not deviate from the meaning of invention, it can implement with a various form.

  In the above embodiment, the partition wall 61 is provided in the storage tank 60, but a storage tank without the partition wall 61 may be adopted. In this case, the exhaust introduced from the exhaust gas pipe 83 or the intake air introduced from the intake pipe 87 is mixed with the evaporation.

DESCRIPTION OF SYMBOLS 10 ... Engine main body 11 ... Spark plug 12 ... Cylinder 13 ... Piston 14 ... Combustion chamber 15 ... Intake valve 16 ... Exhaust valve 17 ... Injector 20 ... Intake System 21 ... Intake pipe 22 ... Intake port 23 ... Intake passage 24 ... Air cleaner 25 ... Throttle valve 26 ... Intercooler 30 ... Exhaust system 31 ... Exhaust pipe 32 .... Exhaust passage 33 ... Exhaust shutter 40 ... Fuel tank 50 ... Canister 60 ... Storage tank 61 ... Partition wall 62 ... Evaporation chamber 63 ... Gas chamber 64 ... Pressure Sensor 70 ... ECU
81 ... Storage pipe 82 ... Supply pipe 83 ... Exhaust gas pipe 84 ... Storage valve 85 ... Supply valve 86 ... Pressure valve 87 ... Intake pipe 88 ... Pressure valve 90 ... supercharger 91 ... compressor 92 ... turbine

Claims (7)

A storage pipe that guides the evaporative fuel generated in the fuel tank;
A storage valve capable of blocking the pipeline of the storage pipe;
A storage tank for storing the evaporation guided by the storage pipe;
A supply pipe for supplying the evaporation from the storage tank to the intake passage;
A supply valve capable of blocking a pipe line of the supply pipe;
A pressurizing pipe connected to the storage tank;
A pressure valve capable of blocking a line of the pressurizing pipe;
A pipeline shut-off process for shutting off the pipeline of the storage pipe at the storage valve and shutting off the pipeline of the supply pipe at the supply valve;
A pressure increasing process for increasing the internal pressure of the storage tank by introducing gas from the pressurizing pipe after the pipe line blocking process;
And, after the pressure increase process, a supply process for supplying the evaporation to the intake passage using the internal pressure by opening a pipe line of the supply pipe at the supply valve,
A control unit for executing
Equipped with a,
The evaporation supply device according to claim 1, wherein the pressurization pipe is an exhaust gas pipe connecting the exhaust passage and the storage tank . The evaporation supply apparatus according to claim 1 ,
An exhaust shutter for closing the exhaust passage is provided on the downstream side of the exhaust gas pipe,
The evaporator supply device, wherein the control unit closes the exhaust passage by the exhaust shutter when introducing exhaust gas from the exhaust gas pipe. A storage pipe that guides the evaporative fuel generated in the fuel tank;
A storage valve capable of blocking the pipeline of the storage pipe;
A storage tank for storing the evaporation guided by the storage pipe;
A supply pipe for supplying the evaporation from the storage tank to the intake passage;
A supply valve capable of blocking a pipe line of the supply pipe;
A pressurizing pipe connected to the storage tank;
A pressure valve capable of blocking a line of the pressurizing pipe;
A pipeline shut-off process for shutting off the pipeline of the storage pipe at the storage valve and shutting off the pipeline of the supply pipe at the supply valve;
A pressure increasing process for increasing the internal pressure of the storage tank by introducing gas from the pressurizing pipe after the pipe line blocking process;
And, after the pressure increase process, a supply process for supplying the evaporation to the intake passage using the internal pressure by opening a pipe line of the supply pipe at the supply valve,
A control unit for executing
With
The evaporation supply device according to claim 1, wherein the pressurization pipe is an intake pipe that connects the intake passage downstream of the turbocharger and upstream of the throttle valve to the storage tank. In the evaporation supply apparatus according to claim 3 ,
The evaporator supply device, wherein the control unit closes the intake passage by the throttle valve when introducing intake air from the intake pipe. In the evaporation supply device according to any one of claims 1 to 4 ,
In the storage tank, an evaporation chamber for storing the evaporation and a gas chamber into which gas from the pressurizing pipe is introduced are partitioned by a partition wall,
The evaporation supply apparatus, wherein the partition wall bulges toward the evaporation chamber side due to the pressure increase in the gas chamber, and the pressure in the evaporation chamber increases. In the evaporation supply apparatus as described in any one of Claims 1-5 ,
When the control unit determines that the fuel injection from the injector is cut, the control unit executes the pipe line shutoff process and the pressure increase process. In the evaporation supply device according to any one of claims 1 to 6 ,
The evaporation supply device according to claim 1, wherein the control unit executes the supply process when determining that there is a request for starting the engine.

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