JP2008215341A - Canister and evaporated fuel treatment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve mountability of a canister to a vehicle. <P>SOLUTION: The canister 64 is provided with adsorbent 66 adsorbing evaporated fuel generated in a fuel tank of a vehicle and disorbing the adsorbed evaporated fuel by negative pressure generated in an intake passage 31 of an engine 20. The canister 64 is provided as a part of an air cleaner 35 on the air cleaner 35 which is an intake system part of vehicle structure parts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention mainly adsorbs evaporated fuel (also referred to as “vapor”) generated in a fuel tank of a vehicle such as a motorcycle and a small vehicle similar thereto, and the adsorbed evaporated fuel is absorbed in an intake passage of an engine. The present invention relates to a canister and an evaporative fuel processing apparatus including an adsorbent that is desorbed by an intake negative pressure generated in the air.

  As a canister of a vehicle, for example, a motorcycle, there is one described in Patent Document 1. In Patent Document 1, a canister frame having a bulging portion that bulges outward from the center side of the vehicle body frame is provided, and the canister is held inside the bulging portion of the canister frame, whereby an engine of a motorcycle is provided. The canisters are arranged to avoid the auxiliary equipment.

JP-A-6-305469

The canister described in Patent Document 1 must be mounted on the canister frame using mounting parts such as a rubber band and a cushion material, and requires mounting parts and man-hours. There was a problem of being bad. This can be said to be a big problem in, for example, a canister mounted on a motorcycle and a small vehicle similar to the same, in which a canister is attached in a limited space.
The problem to be solved by the present invention is to provide a canister and an evaporative fuel processing apparatus capable of improving the mountability on a vehicle.

The above-described problem can be solved by a canister and an evaporative fuel processing apparatus having the structure described in the claims.
That is, according to the canister according to claim 1 of the scope of claims, the canister is provided as a part of the vehicle component for the vehicle component constituting the vehicle. As a result, the parts and man-hours required for mounting the canister to the vehicle are omitted, and the mountability of the canister to the vehicle can be improved. This can be said to be effective for a motorcycle and a small vehicle similar to this, in which a canister is attached in a limited space. The term “motorcycle and similar small vehicle” as used in this specification corresponds to a vehicle in which the fuel tank is arranged at a higher position than the engine. “Small vehicles similar to motorcycles” include, for example, motorbikes, tricycles, small four-wheeled vehicles, transport vehicles not used for public roads, golf carts, lawn mowers, mowers, and other working vehicles. Equivalent to. In addition, as a vehicle component, there is one that is disposed at a position where the evaporated fuel generated in the fuel tank can reach the adsorbent using its own weight, that is, at a position lower than the evaporated fuel discharge port of the fuel tank. Is preferred.

  According to the canister according to claim 2 of the claims, the vehicle component is an intake system component of the engine. Accordingly, since the canister is provided in the intake system component disposed at a position close to the intake passage, the piping structure related to the desorption of the evaporated fuel can be simplified.

  According to the canister of claim 3, the intake system component is an air cleaner. Therefore, a canister can be provided as a part of the air cleaner.

  Further, according to the canister according to claim 4 of the claims, a part of the intake passage forming member that forms the intake passage in the intake system component is also used as a part of the container that stores the adsorbent. It is. Therefore, the intake system component including the canister can be made compact.

  According to the canister according to claim 5 of the claims, the container for housing the adsorbent is integrally formed with the intake passage forming member forming the intake passage in the intake system component. Therefore, the configuration of the intake system component including the canister can be simplified.

  According to the canister according to claim 6, the vehicle component is a seat for seating. Therefore, a canister can be provided as a part of the seat for seating. In addition, when the vehicle is a saddle type vehicle such as a motorcycle, the canister is provided in the seat for seating disposed near the fuel tank, so that the piping structure for introducing the evaporated fuel can be simplified. Can do.

  Moreover, according to the canister concerning Claim 7 of a claim, it is equipped with the seat for seating. Therefore, the empty space in the seat for seating can be effectively used as the installation space for the canister. Moreover, since the empty space in the seat for seating is easy to take, the capacity of the canister can be increased.

  According to the canister according to claim 8 of the claims, the vehicle component is the vehicle body frame. Therefore, a canister can be provided as a part of the vehicle body frame.

  Further, according to the canister according to claim 9 of the claims, the adsorbent is accommodated in the pipe material constituting the vehicle body frame. Therefore, an empty space in the vehicle body frame can be effectively used as a canister installation space.

  According to the canister according to claim 10, the vehicle component is a vehicle body cover. Therefore, a canister can be provided as a part of the vehicle body cover.

  Moreover, according to the canister concerning Claim 11 of a claim, it is equipped with the step cover part of the vehicle body cover. Therefore, an empty space in the step cover portion of the vehicle body cover can be effectively used as a canister installation space.

  According to the canister of claim 12, the evaporative fuel introduction port provided in the container for accommodating the adsorbent and communicated with the fuel tank is provided on the fuel tank side when the vehicle component is mounted on the vehicle. It is arranged at the position. Thereby, the piping structure concerning introduction of evaporative fuel can be simplified.

  According to the canister according to claim 13 of the claims, the purge port provided in the container for accommodating the adsorbent and communicated with the intake passage is on the intake passage side when the vehicle component is mounted on the vehicle. Placed in position. Thereby, the piping structure concerning the desorption of the evaporated fuel can be simplified.

  According to the canister according to claim 14 of the claims, the evaporative fuel introduction port or the purge port is provided with an on-off valve that opens and closes the port by being controlled by the control device. Thereby, the flow of the evaporated fuel flowing through the evaporated fuel introduction port or the purge port can be controlled.

  Further, according to the canister according to claim 15 of the claims, the purge opening that communicates the inside of the container that stores the adsorbent and the inside of the intake passage of the intake passage forming member that forms the intake passage in the intake system parts. Is provided. Thus, the evaporated fuel in the container can be purged by the intake negative pressure acting in the container from the intake passage of the intake passage forming member through the purge opening. Therefore, the purge passage by the piping for purging the evaporated fuel in the container can be omitted.

  According to the canister of claim 16, the purge opening is formed in the partition wall that partitions the inside of the container and the intake passage of the intake passage forming member. Thereby, the inside of a container and the inside of the intake passage of an intake passage formation member can be connected by the simple structure of forming the opening part for purge in a division wall.

  According to the canister according to claim 17 of the claims, the purge opening is provided with a filter member having air permeability and restricting the outflow of the adsorbent to the intake passage. As a result, the intake air pressure due to the intake air negative pressure is applied while purging the evaporated fuel in the container by applying the intake air negative pressure to the container from the intake passage of the intake passage forming member through the purge opening due to the air permeability of the filter member. The outflow of the adsorbent to the passage can be restricted.

  In the canister according to claim 18 of the claims, the purge opening is provided with a purge amount control valve that opens and closes the purge opening by being controlled by the control device. As a result, the amount of evaporated fuel that flows through the purge opening can be controlled. Further, by closing the purge amount control valve when the engine is stopped, it is possible to prevent or reduce evaporative fuel leakage (so-called vapor leakage) from the container into the intake passage of the intake passage forming member.

  According to the fuel vapor processing apparatus of the nineteenth aspect of the present invention, a part of the engine exhaust gas is introduced into the container of the canister. Thereby, the purge efficiency can be improved by using exhaust gas (so-called EGR gas) as a medium for purging the evaporated fuel in the container.

  According to the fuel vapor processing apparatus of claim 20, the exhaust gas introduction passage is controlled by the control device so that the exhaust gas introduction passage introduces the exhaust gas into the container of the canister. An exhaust gas amount control valve that opens and closes is provided. Thereby, the amount of exhaust gas flowing through the exhaust gas introduction passage can be controlled.

  According to the fuel vapor processing apparatus of claim 21, the exhaust gas amount control valve switches between a state in which exhaust gas is introduced into the container of the canister and a state in which air is introduced into the container. This is an electromagnetically driven three-way switching valve configured to be possible. Accordingly, it is possible to appropriately switch between a state in which exhaust gas is introduced into the canister vessel and a state in which air is introduced into the vessel according to the operating state of the engine.

  Next, the best mode for carrying out the present invention will be described with reference to examples.

[Example 1]
A first embodiment of the present invention will be described. In this embodiment, a canister mounted on a motorcycle will be exemplified. First, a fuel injection engine system for a motorcycle equipped with a canister will be described. FIG. 1 is a schematic configuration diagram showing a fuel injection type engine system of a motorcycle.

  As shown in FIG. 1, an engine system 10 mounted on a motorcycle (not shown) includes a fuel tank 12 for storing fuel. The fuel pump 13 disposed in the fuel tank 12 sucks and pressurizes the fuel stored in the fuel tank 12 through the fuel filter 14 and passes through the fuel supply passage 15 to a fuel injection valve 38 (described later). Supply. The fuel pump 13 is driven and controlled by an ECU 57 (described later). The pressure of the fuel supplied to the fuel injection valve 38 is adjusted to a predetermined pressure by the pressure regulator 17. The motorcycle corresponds to the “vehicle” in this specification.

  A reciprocating type four-cycle single cylinder engine (simply referred to as “engine”) 20 that is an internal combustion engine is provided with a water temperature sensor 22 that detects the temperature of engine cooling water. Further, the engine 20 is provided with a crank angle sensor 25 for detecting the rotation speed of the crankshaft 24, that is, the engine rotation speed. Further, detection signals from the water temperature sensor 22 and the crank angle sensor 25 are output to the ECU 57 (described later).

  On the intake side of the engine 20, an intake pipe 30 that communicates with the intake port 28 of the cylinder head 27, a throttle body 32 that communicates with the intake pipe 30 and includes a throttle valve 33, and an air cleaner 35 that communicates with the throttle body 32 are disposed. ing. The air cleaner 35 has an air cleaner element 37 incorporated in an air cleaner body 36 that forms an outer shell thereof. The air cleaner body 36 is opened with an air intake port 36 a located upstream of the air cleaner element 37, that is, on the dirty side. Further, in the motorcycle, the air cleaner 35 is disposed at a position lower than the position where the fuel tank 12 is disposed. The intake pipe 30, the throttle body 32, and the air cleaner 35 (specifically, the air cleaner main body 36 that forms the outer shell of the air cleaner 35) form a series of intake passages 31 that communicate with the combustion chamber 39 of the engine 20. This corresponds to “intake system part” in the specification. A fuel injection valve 38 is attached to the intake pipe 30.

  The throttle valve 33 of the throttle body 32 is opened and closed based on the operation of a predetermined accelerator device (not shown), whereby the amount of intake air taken into the combustion chamber 39 of the engine 20 through the intake passage 31 is adjusted. The The throttle body 32 is provided with a throttle position sensor 42 for detecting the opening of the throttle valve 33 and an intake pressure sensor 43 for detecting the intake pressure. The air cleaner body 36 of the air cleaner 35 is provided with an intake air temperature sensor 47 for detecting the intake air temperature on the downstream side of the air cleaner element 37, that is, on the clean side. The detection signals of the throttle position sensor 42, the intake pressure sensor 43, and the intake air temperature sensor 47 are output to the ECU 57 (described later).

  An exhaust pipe 45 communicating with the exhaust port 44 of the cylinder head 27 is communicated with the exhaust side of the engine 20. A three-way catalyst 48 for purifying the exhaust gas is provided in the exhaust passage 46 in the exhaust pipe 45. The cylinder head 27 is provided with a spark plug 50 that faces the combustion chamber 39. The spark plug 50 sparks in response to an ignition signal output from the ignition coil 51 at each ignition timing by an ECU 57 (described later). As a result, the combustible air-fuel mixture supplied to the combustion chamber 39 is ignited.

  The fuel supplied to the fuel injection valve 38 from the fuel tank 12 through the fuel supply passage 15 by the fuel pump 13 is injected into the intake passage 31 in the intake pipe 30 by the operation of the fuel injection valve 38. In addition, air from the outside is taken into the intake passage 31 through the air cleaner element 37 of the air cleaner 35. The air taken into the intake passage 31 and the fuel injected from the fuel injection valve 38 are sucked into the combustion chamber 39 of the engine 20 as a combustible air-fuel mixture, that is, a predetermined air-fuel ratio (A / F) air-fuel mixture. . The combustible air-fuel mixture sucked into the combustion chamber 39 explodes and burns by the spark discharge of the spark plug 50. As a result, the piston 53 moves and the crankshaft 24 rotates, whereby a driving force for running the motorcycle is obtained. Further, the exhaust gas after combustion is discharged to the outside, that is, to the atmosphere through the exhaust passage 46 in the exhaust pipe 45.

  In addition, a motorcycle equipped with the engine 20 includes a battery 55 as a vehicle power source, an ignition switch 56 for starting the engine 20 when operated by a driver, and an electronic control for controlling various actuators of the engine 20. An apparatus (referred to as “ECU”) 57 is provided.

  The battery 55 is connected to the ECU 57 via the ignition switch 56. Therefore, a main relay 58 for supplying and cutting off electric power from the battery 55 to the ECU 57 is provided between the ignition switch 56 and the ECU 57. The main relay 58 includes a contact point and a coil, and performs an on / off operation using a magnetic force generated in the coil when a current flows through the coil when the ignition switch 56 is turned on. That is, the main relay 58 is turned on when a current is passed through the coil, and is turned off when a current is not passed through the coil. When the main relay 58 is turned on, electric power is supplied from the battery 55 to the ECU 57.

  The sensors 22, 25, 42, 43, and 47 provided in the engine 20 detect various operating parameters related to the operating state of the engine 20, and are connected to an ECU 57 (described later). That is, the water temperature sensor 22 detects the temperature (cooling water temperature) of the engine cooling water flowing through the so-called water jacket inside the engine 20 and outputs an electric signal corresponding to the detected value to the ECU 57. The crank angle sensor 25 detects the number of rotations of the crankshaft 24 and outputs an electric signal corresponding to the detected value to the ECU 57. The throttle position sensor 42 detects the opening degree of the throttle valve 33 and outputs an electric signal corresponding to the detected value to the ECU 57. The intake pressure sensor 43 detects the intake pressure in the intake passage 31 on the downstream side of the throttle valve 33 and outputs an electric signal corresponding to the detected value to the ECU 57. The intake air temperature sensor 47 detects the intake air temperature on the downstream side of the air cleaner element 37, that is, the clean side, and outputs an electrical signal corresponding to the detected value to the ECU 57.

  The ECU 57 controls the fuel injection valve 38, the ignition coil 51, and the like in order to execute fuel injection control and ignition timing control based on the electrical signals output from the sensors 22, 25, 42, 43, 47, respectively. Drive control. Here, the fuel injection control is to control the fuel injection amount by the fuel injection valve 38 and the injection timing thereof according to the operating state of the engine 20. The ignition timing control is to control the ignition timing by the spark plug 50 by controlling the ignition coil 51 in accordance with the operating state of the engine 20.

  As is well known, the ECU 57 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), a backup RAM, an external input circuit, an external output circuit, and the like. The ECU 57 constitutes a logical operation circuit in which a CPU, a ROM, a RAM, a backup RAM, an external input circuit, an external output circuit, and the like are connected by a data bus. The ROM stores a predetermined control program related to various controls of the engine 20 in advance. The RAM temporarily stores the calculation results of the CPU. The backup RAM stores data stored in advance. Further, the CPU executes the above-described various controls in accordance with a predetermined control program based on the detection signals of the sensors 22, 25, 42, 43, and 47 input via the input circuit. The ECU 57 constitutes a “control device” in this specification.

  The engine system 10 (see FIG. 1) includes an evaporated fuel processing device 60 for processing the evaporated fuel generated in the fuel tank 12 to prevent the evaporated fuel from flowing out to the atmosphere. The evaporated fuel processing device 60 adsorbs the evaporated fuel generated in the fuel tank 12 through the evaporated fuel introduction passage 62 by the adsorbent 66 of the canister 64 and purges the adsorbed evaporated fuel to the intake passage 31 through the purge passage 68. To do. The canister 64 is provided as a part of the air cleaner 35 with respect to the air cleaner 35. The air cleaner 35 corresponds to a “vehicle component constituting the vehicle” in this specification. The air cleaner body 36 corresponds to an “intake passage forming member” in the present specification.

The canister 64 will be described in detail. FIG. 2 is a sectional view showing the air cleaner.
As shown in FIG. 2, the canister 64 includes a box-shaped container 65 externally attached to one side (right side in FIG. 2) of the air cleaner body 36 so as to be continuous with the air cleaner body 36. And an adsorbent 66 made of activated carbon or the like housed in a container 65. The upper plate portion 65a of the container 65 is provided with an evaporative fuel introduction port 70, a purge port 71, and an atmospheric port 72.

  As shown in FIG. 1, one end of the evaporated fuel introduction passage 62 communicates with the evaporated fuel introduction port 70. The other end of the evaporated fuel introduction passage 62 communicates with the inside of the fuel tank 12 via an evaporated fuel discharge port 74 provided on the upper surface of the fuel tank 12. The purge port 71 communicates with one end of the purge passage 68. The other end of the purge passage 68 communicates with the inside of the intake passage 31 through a purge communication port 75 opened in the intake pipe 30 on the downstream side of the throttle valve 33. Further, it is assumed that the evaporated fuel introduction port 70 is disposed on the upper surface of the container 65 closer to the fuel tank 12 (specifically, the evaporated fuel discharge port 74) than the purge port 71. Further, it is assumed that the purge port 71 is disposed on the upper surface of the container 65 on the intake passage 31 (specifically, the purge communication port 75) side of the evaporated fuel introduction port 70. The atmospheric port 72 is open to the atmosphere. Further, the adsorbent 66 adsorbs the evaporated fuel generated in the fuel tank 12 through the evaporated fuel introduction passage 62. The evaporated fuel adsorbed on the adsorbent 66 is desorbed through the purge passage 68 by the intake negative pressure generated in the intake passage 31 as described above. Since the other configuration of the canister 64 is the same as a known one, its description is omitted.

  The purge port 71 is provided with an electromagnetically driven on-off valve 77. The on-off valve 77 is controlled to be opened and closed by the ECU 57 in accordance with the operating state of the engine 20. When the on-off valve 77 is open, the evaporated fuel in the container 65 (mainly evaporated fuel adsorbed by the adsorbent 66) is introduced into the intake passage 31 through the purge passage 68 using intake negative pressure. Thus, the engine 20 is combusted. At that time, the atmosphere (air) is introduced into the container 65 through the atmosphere port 72. In addition, the atmospheric port 72 relieves pressure fluctuations generated in the container 65 by introducing air into the container 65 from the outside or discharging air from the container 65 to the outside. The pressure fluctuation generated in the container 65 includes, for example, a negative pressure caused by fuel consumption, a temperature drop, a purge, and the like, and a positive pressure caused by the generation of evaporated fuel due to a temperature rise, fuel fluctuation, and the like. The on-off valve 77 only needs to be provided in a passage for purging the evaporated fuel desorbed from the adsorbent 66 into the intake passage 31, and can be provided in the purge passage 68 instead of the purge port 71.

  The canister 64 described above is provided as a part of the air cleaner 35 with respect to the air cleaner 35 that is a vehicle component constituting the motorcycle (see FIGS. 1 and 2). As a result, parts and man-hours required for mounting the canister 64 to the motorcycle are omitted, so that the mountability of the canister 64 to the motorcycle can be improved. This can be said to be effective for a motorcycle in which the installation work of the canister 64 in a limited space is unavoidable and a small vehicle similar thereto.

  The air cleaner 35 is disposed at a position lower than the fuel tank 12 (specifically, the evaporated fuel discharge port 74) (see FIG. 1). Therefore, the evaporated fuel generated in the fuel tank 12 and flowing through the evaporated fuel introduction passage 62 can reach the adsorbent 66 by using its own weight, and the adsorbability of the evaporated fuel to the adsorbent 66 is improved. Can do.

  The vehicle component provided with the canister 64 is an air cleaner 35 as an intake system component of the engine 20. Accordingly, since the canister 64 is provided in the air cleaner 35 disposed at a position close to the intake passage 31, the piping structure relating to the desorption of the evaporated fuel, that is, the piping structure constituting the purge passage 68 can be simplified. That is, by shortening the piping distance constituting the purge passage 68, the piping trouble due to the auxiliary machinery of the engine 20 can be reduced, and the piping work can be facilitated.

Further, since the intake system component is the air cleaner 35, the canister 64 can be provided as a part of the air cleaner 35. In addition to the air cleaner 35, a canister 64 may be provided as a part of the intake system parts for the intake system parts such as the intake pipe 30, the throttle body 32, and the intake duct (not shown).
Further, since the canister 64 is externally attached to the air cleaner 35 (specifically, the air cleaner body 36), it is possible to avoid an increase in the ventilation resistance of the intake air flowing through the air cleaner body 36.

  An evaporative fuel introduction port 70 provided in the container 65 for accommodating the adsorbent 66 and communicating with the fuel tank 12 is disposed at a position on the fuel tank 12 side when the air cleaner 35 is mounted on the motorcycle. Thereby, the piping structure for introducing the evaporated fuel, that is, the piping structure constituting the evaporated fuel introduction passage 62 can be simplified. That is, by shortening the piping distance that constitutes the evaporated fuel introduction passage 62, it is possible to reduce the failure of the piping due to the auxiliary machinery of the engine 20 and facilitate the piping work.

  Further, a purge port 71 provided in the container 65 for containing the adsorbent 66 and communicating with the intake passage 31 is disposed at a position on the intake passage 31 side when the air cleaner 35 is mounted on the motorcycle. Thereby, the piping structure related to the desorption of the evaporated fuel, that is, the piping structure constituting the purge passage 68 can be simplified. That is, by shortening the piping distance constituting the purge passage 68, the piping trouble due to the auxiliary machinery of the engine 20 can be reduced, and the piping work can be facilitated.

  The purge port 71 is provided with an opening / closing valve 77 that opens and closes the port 71 by being controlled to open and close by the ECU 57. Thereby, the flow of the evaporated fuel flowing through the purge port 71 can be controlled.

[Example 2]
A second embodiment of the present invention will be described. Since this embodiment is obtained by changing a part of the first embodiment, the changed portion will be described in detail, and redundant description will be omitted. In addition, the same description is omitted for the following embodiments. FIG. 3 is a cross-sectional view showing the air cleaner.
In this embodiment, the canister 64 (see FIG. 1) in the first embodiment is modified. That is, as shown in FIG. 3, a container (reference numeral 265) of a canister (reference numeral 264) is an air cleaner body (reference numeral 236) of an air cleaner (reference numeral 235). And an outer shell member 238 surrounding the air cleaner body 236. The adsorbent 66 is accommodated in a space formed between the air cleaner body 236 and the outer shell member 238. Further, the upper plate portion 238a of the outer shell member 238 is provided with an evaporative fuel introduction port (reference numeral 270) and an atmospheric port (reference numeral 272). Further, a purge port (reference numeral 271 is provided) is provided below the side plate portion 238b on the intake passage 31 side (left side in FIG. 3) of the outer shell member 238. In the canister 264 of this embodiment, the air cleaner body 236 of the air cleaner 235 is also used as a part of the container 265. The air intake port (reference numeral 236a) of the air cleaner body 236 is opened to the outside of the outer shell member 238 through a space between the air cleaner body 236 and the outer shell member 238.

The canister 264 according to the present embodiment can provide the same operation and effect as the canister 64 (see FIG. 1) in the first embodiment.
Further, since the air cleaner main body 236 of the air cleaner 235 is also used as a part of the container 265, the air cleaner 235 including the canister 264 can be made compact.
Further, since the canister 264 is externally attached so as to surround the air cleaner 235 (specifically, the air cleaner body 236), it is possible to avoid an increase in the ventilation resistance of the intake air flowing through the air cleaner body 36.

[Example 3]
A third embodiment of the present invention will be described. FIG. 4 is a cross-sectional view showing the air cleaner.
In this embodiment, the canister 64 (see FIG. 1) in the first embodiment is modified. That is, as shown in FIG. 4, a container (reference numeral 365) is attached to a canister (reference numeral 364), and an air cleaner body (reference numeral 336) is attached to an air cleaner (reference numeral 335). Are integrally formed on one side (right side in FIG. 4). Similarly to the first embodiment, the upper plate portion 365a of the container 365 has an evaporative fuel introduction port (reference numeral 370), a purge port (reference numeral 371), and an atmospheric port (reference numeral 372). Attached.) Is provided.

The canister 364 according to the present embodiment can provide the same operation and effect as the canister 64 (see FIG. 1) in the first embodiment.
In addition, the air cleaner body 336 is integrally formed with a container 365 for storing the adsorbent 66. Therefore, the configuration of the air cleaner 335 including the canister 364 can be simplified.
Further, since the canister 64 is externally provided on the air cleaner 35 (specifically, the air cleaner body 336), it is possible to avoid an increase in the ventilation resistance of the intake air flowing through the air cleaner body 336.

[Example 4]
Embodiment 4 of the present invention will be described. FIG. 5 is a side view showing a partially broken main part of the motorcycle, and FIG. 6 is a sectional view taken along line VI-V1 in FIG.
In this embodiment, the canister 64 (see FIG. 1) in the first embodiment is modified. That is, as shown in FIG. 5, a canister (reference numeral 464 is attached) is a part of the seating seat 480 with respect to the seating seat 480 that is a vehicle component constituting the off-road motorcycle 400. Is provided. The seat for seating 480 includes a seat panel 481, a seat cushion 482 provided on the seat panel 481, and a seat skin 483 that covers the seat cushion 482 (see FIG. 6).

  As shown in FIG. 5, the seat for seating 480 is supported on a rear frame 485 a of a vehicle body frame 485 in the motorcycle 400. The front part of the seat 480 covers the rear part (right part in FIG. 5) of the fuel tank (reference numeral 412) installed on the front part of the main frame 485b of the vehicle body frame 485. An engine (reference numeral 420 is attached) is mounted on the lower frame 485c of the vehicle body frame 485. The engine 420 is disposed below the fuel tank 412.

  The canister 464 is mounted in the seating seat 480 near the rear of the fuel tank 412 (near the right side in FIG. 5) (see FIG. 6). A box-shaped container (reference numeral 465) accommodating the adsorbent 66 of the canister 464 is fixed on the seat panel 481 of the seat 480. Further, a recess 482a having a lower surface opening for accommodating the container 465 is formed on the lower surface side of the seat cushion 482.

  As shown in FIG. 5, an evaporative fuel introduction port (reference numeral 470) is provided on the side plate portion on the fuel tank 412 side of the container 465, that is, the upper portion of the front plate portion 465b. In addition, a purge port (reference numeral 471 is provided) is provided in a side plate portion on the intake passage 31 side of the container 465, that is, a front portion of the lower plate portion 465c. In addition, an atmospheric port (reference numeral 472) is provided at the rear of the lower plate portion 465c.

The canister 464 according to the present embodiment can obtain the same operation and effect as the canister 64 (see FIG. 1) in the first embodiment.
The vehicle component provided with the canister 464 is a seat 480 for seating. Therefore, the canister 464 can be provided as a part of the seat 480 for seating. In addition, since the motorcycle 400 is a so-called saddle type vehicle, the canister 464 is provided in the seat for seat 480 disposed near the fuel tank 412, so that the piping structure for introducing the evaporated fuel, that is, the evaporated fuel introduction passage is provided. The piping structure constituting 62 can be simplified.

  A canister 464 is housed in the seat 480 for seating. Therefore, the empty space in the seating seat 480 can be effectively used as the installation space for the canister 464. Further, since the empty space in the seat for seating 480 is easy to take, the capacity of the canister 464 can be increased. The canister 464 can be externally attached to the lower side of the seat 480.

[Example 5]
A fifth embodiment of the present invention will be described. 7 is a side view showing the motorcycle, FIG. 8 is a perspective view showing the body frame, and FIG. 9 is a cross-sectional view showing the main part of the body frame.
In this embodiment, the canister 64 (see FIG. 1) in the first embodiment is modified. That is, as shown in FIG. 7, a canister (reference numeral 564) is attached to a vehicle body frame (reference numeral 585) that is a vehicle component constituting a motorcycle (reference numeral 500). This is provided as a part of the body frame 585. The vehicle body frame 585 has a pipe frame structure formed by a combination of pipe materials (see FIG. 8).

  As shown in FIG. 7, the canister 564 is a pipe member 586 that extends in the longitudinal direction and is located in front of the engine (reference numeral 520) in the lower frame (reference numeral 585 c) of the vehicle body frame 585. Is provided as part of a container (reference numeral 565) (see FIG. 8). That is, as shown in FIG. 9, a pair of upper and lower cover plates 588 and 589 for closing the inside of the pipe material 586 are fixedly provided in the pipe material 586. Therefore, a hollow container 565 is constituted by the pipe material 586 and the two cover plates 588 and 589. The adsorbent 66 is accommodated in the container 565, that is, in a space formed between the pipe member 586 and the two cover plates 588 and 589.

  An evaporative fuel introduction port (reference numeral 570) is provided on the side of the fuel tank (reference numeral 512, refer to FIG. 7) in the container 565, that is, the upper cover plate 588. A purge port (reference numeral 571 is provided) is provided on the side of the intake passage 31 in the container 565, that is, on the engine 520 side (right side in FIG. 9) of the pipe material 586 of the lower frame 585c. The lower lid plate 589 is provided with an atmospheric port (reference numeral 572). The atmosphere port 572 is open to the atmosphere through a hole (not shown) opened on the lower surface side of the pipe material 586 with the inside of the pipe material 586 as an atmosphere passage.

The canister 564 according to the present embodiment can provide the same operations and effects as the canister 64 (see FIG. 1) in the first embodiment.
A vehicle component provided with the canister is a vehicle body frame 585. Therefore, the canister 564 can be provided as a part of the vehicle body frame 585.

  Further, an adsorbent 66 is accommodated in a pipe member 586 constituting the body frame 585. Therefore, an empty space in the vehicle body frame 585 can be effectively used as an installation space for the canister 564.

[Example 6]
Embodiment 6 of the present invention will be described. FIG. 10 is a side view showing the motorcycle, and FIG. 11 is a cross-sectional view showing the step cover portion of the vehicle body cover.
In this embodiment, the canister 64 (see FIG. 1) in the first embodiment is modified. That is, as shown in FIG. 10, a canister (reference numeral 664) is attached to a vehicle body cover 690 which is a vehicle component constituting a motorcycle (reference numeral 600). It is provided as a part. In the motorcycle 600 of this embodiment, the driver sits on a seat for seating (reference numeral 680), and the left and right of the body frame (reference numeral 685) (only one is shown in FIG. 10). This is a scooter type in which driving is performed by grasping the handle 684 in a posture in which the legs are placed on both step portions 685d and the spine is extended. Further, a fuel tank (reference numeral 612) is installed below the seat 680, and an engine (reference numeral 620) is mounted on the upper side between both step portions 685d. Yes.

  A vehicle body including the vehicle body frame 685, the fuel tank 612, the engine 620, and the like is covered with a vehicle body cover 690. As is well known, the vehicle body cover 690 is configured by combining a predetermined number of cover portions that cover the front side, the left and right side portions, and the like. Thus, the vehicle body cover 690 includes left and right (only one is shown in FIG. 10) step cover portions 691 that cover the periphery of each step portion 685d of the vehicle body frame 685, that is, the lower and outer portions.

  The canister 664 is housed in one step cover portion 691 of the vehicle body cover 690. As shown in FIG. 11, a box-shaped container (denoted by reference numeral 665) accommodating the adsorbent 66 of the canister 664 is formed between the step portion 685d of the vehicle body frame 685 and the step cover portion 691 of the vehicle body cover 690. In the space part formed between them, it is fixed to the step cover part 691 side.

  An evaporative fuel introduction port (reference numeral 670) is provided on the fuel tank 612 side of the upper plate portion 665a of the container 665, that is, the rear portion. Further, a purge port (reference numeral 671) is provided in a side plate portion on the side of the intake passage 31 in the container 665, that is, the front plate portion 665b. The lower plate portion 665c of the container 665 is provided with an atmospheric port (reference numeral 672).

The canister 664 according to the present embodiment can provide the same operations and effects as the canister 64 (see FIG. 1) in the first embodiment.
A vehicle component provided with the canister 664 is a vehicle body cover 690. Therefore, the canister 664 can be provided as a part of the vehicle body cover 690.

  A canister 664 is housed in the step cover portion 691 of the vehicle body cover 690. Therefore, an empty space in the step cover portion 691 of the vehicle body cover 690 can be effectively used as an installation space for the canister 664. The canister 664 can also be installed in a cover portion other than the step cover portion 691 of the vehicle body cover 690. The canister 664 can also be provided as a part of the step portion 685d in the step cover portion 691 of the vehicle body cover 690 with respect to the step portion 685d of the vehicle body frame 685 that is a vehicle component constituting the motorcycle 600. .

[Example 7]
A seventh embodiment of the present invention will be described. In addition, FIG. 12 is sectional drawing which shows an air cleaner.
In this embodiment, the air cleaner 235 (see FIG. 3) in the second embodiment is modified. That is, as shown in FIG. 12, the purge port 271 provided with the on-off valve 77 in the air cleaner 235 (see FIG. 3) is omitted in the air cleaner (reference numeral 735) of this embodiment. Accordingly, the purge passage 68 and the purge communication port 75 (see FIG. 1) are also omitted.

  In the air cleaner 735, the air cleaner body 236 that also serves as a part of the container 265 of the canister 264 is a partition wall that partitions the container 265 and the intake passage 31 of the air cleaner body 236. A cylindrical portion 774 having a hollow cylindrical shape is provided on a clean wall portion (for example, a lower wall portion (reference numeral 237)) of the air cleaner body 236 that is a partition wall. The cylindrical part 774 protrudes on the lower wall part 237 of the air cleaner body 236. The hollow portion in the cylindrical portion 774 serves as a purge opening 773 that communicates the inside of the container 265 with the inside of the intake passage 31 of the air cleaner body 236. The purge opening 773 is opened with a passage area (opening area) substantially the same as the opening area of the air intake port 236a.

  A filter member 776 for closing the purge opening 773 is provided in the proximal end portion of the cylindrical portion 774. The filter member 776 is formed of a non-woven fabric, filter paper, mesh material, porous material, or the like that has air permeability and can restrict the outflow of the adsorbent 66 to the intake passage 31.

  A purge amount control valve 780 is provided in the purge opening 773. The purge amount control valve 780 rotationally drives a butterfly valve body 781 that opens and closes the purge opening 773 and a pivot shaft 782 that is rotatably supported by the cylindrical portion 774 and has the valve body 781. And a drive motor 783. The drive motor 783 is controlled to be opened and closed by the ECU 57 in accordance with the operating state of the engine 20. The ECU 57 (see FIG. 1) controls driving of the drive motor 783 based on signals from the throttle position sensor 42, the intake pressure sensor 43, and the like. By opening and closing the valve body 781 by driving the drive motor 783, the passage area of the purge opening 773 is increased or decreased. As a result, the amount of evaporated fuel, that is, the purge amount from the container 265 to the intake passage 31 in the operating state of the engine 20 (see FIG. 1) is controlled.

The canister 264 provided in the air cleaner 735 according to the present embodiment can provide the same operations and effects as the canister 264 (see FIG. 3) in the second embodiment.
In addition, a purge opening 773 is provided that communicates the inside of the container 265 that accommodates the adsorbent 66 of the canister 264 and the inside of the intake passage 31 of the air cleaner body 236 that forms the intake passage 31 in the air cleaner 735. Thereby, the evaporated fuel in the container 265 can be purged by the intake negative pressure acting on the container 265 from the intake passage 31 of the air cleaner body 236 through the purge opening 773. Therefore, the purge passage 68 (see FIG. 1) by the piping for purging the evaporated fuel in the container 265 can be omitted.

  Further, when setting the purge passage 68 (see FIG. 1) by piping, since the passage diameter of the piping is generally limited to several millimeters, purging due to insufficient purge amount due to ventilation resistance, insufficient differential pressure, etc. In contrast to the shortage problem, according to the present embodiment, the passage diameter of the purge opening 773 is substantially the same as the passage diameter of the air intake port 236a (for example, about 3 to 5 centimeters). Can be set large. Therefore, the ventilation resistance in the purge opening 773 is small, and the aeration amount (air amount) can be increased and the purge amount can be increased without requiring a large intake negative pressure for the purge. For this reason, even when the throttle valve 33 (see FIG. 1) is in a fully open state or close to a fully open state, the evaporated fuel can be purged using the small intake negative pressure generated in the engine 20, and the purge is insufficient. The problem can be improved.

  Further, when the engine 20 is idling, the amount of intake air is small, and the evaporated fuel in the container 265 of the canister 264 is hardly purged from the purge opening 773, so that the evaporated fuel has an influence on the air-fuel ratio (A / F). It can be said that it is small. Incidentally, since the ventilation resistance in the canister 264 is several times larger than the ventilation resistance of the air cleaner element 37 of the air cleaner 735, it can be said that the purge opening 773 is hardly purged when the intake air amount is small.

  A purge opening 773 is formed in a partition wall (lower wall portion 237) that partitions the inside of the container 265 and the inside of the intake passage 31 of the air cleaner body 236. Thereby, the inside of the container 265 and the inside of the intake passage 31 of the air cleaner body 236 can be communicated with each other by a simple configuration in which the purge opening 773 is formed in the lower wall portion 237 of the air cleaner body 236.

  The purge opening 773 is provided with a filter member 776 that has air permeability and restricts the outflow of the adsorbent to the intake passage. As a result, due to the air permeability of the filter member 776, the intake air negative pressure is applied from the intake passage 31 of the air cleaner body 236 through the purge opening 773 into the container 265 to purge the evaporated fuel in the container 265, The outflow of the adsorbent to the intake passage due to the negative pressure can be restricted.

  The purge opening 773 is provided with a purge amount control valve 780 that opens and closes the purge opening 773 by being controlled by the ECU 57. As a result, the amount of evaporated fuel that flows through the purge opening 773, the so-called purge amount, can be controlled. Further, by closing the purge amount control valve 780 when the engine is stopped, it is possible to prevent or reduce the leakage of evaporated fuel (so-called vapor leakage) from the container 265 into the intake passage 31 of the air cleaner body 236. The purge amount control valve 780 may be provided as necessary, and may be omitted.

[Example 8]
Embodiment 8 of the present invention will be described. FIG. 13 is a schematic configuration diagram showing the engine system.
In this embodiment, a change is made to the evaporated fuel processing device 60 in the engine system 10 (see FIG. 1) of the first embodiment. That is, as shown in FIG. 13, a part of the exhaust gas of the engine 20 is introduced into the container 65 of the canister 64. In FIG. 13, the canister 64 is shown separately from the air cleaner 35 for convenience. The on-off valve 77 is provided in the purge passage 68.

  Specifically, the exhaust pipe 45 is provided with an exhaust gas outlet 80 located near the engine 20. One end of an exhaust gas introduction passage 82 for introducing the exhaust gas of the exhaust passage 31 is communicated with the exhaust gas outlet 80. The exhaust gas introduction passage 82 communicates with the atmospheric port 72 of the canister 64. Thereby, a part of the exhaust gas of the exhaust passage 31 can be introduced into the container 65 of the canister 64. When the engine 20 is provided with an EGR device, the exhaust gas outlet 80 may be shared with the EGR port or may be provided separately from the EGR port.

  An electromagnetically driven exhaust gas amount control valve 84 is provided in the middle of the exhaust gas introduction passage 82, that is, between the upstream passage portion 82a and the downstream passage portion 82b. The exhaust gas amount control valve 84 is controlled to be opened and closed by the ECU 57 in accordance with the operating state of the engine 20.

  Therefore, a vacuum switching valve (VSV) comprising three types of electromagnetic valves is used for the exhaust gas amount control valve 84. An upstream side passage portion 82a of the exhaust gas introduction passage 82 is communicated with the first port 84a of the exhaust gas amount control valve 84, and a downstream side of the exhaust gas introduction passage 82 is communicated with the second port 84b. The side passage part 82b is connected. In addition, one end portion of the air introduction passage 86 communicates with the third port 84 c of the exhaust gas amount control valve 84. The other end portion of the air introduction passage 86 communicates with the inside of the intake passage 31 via an air introduction port 88 opened in a clean wall portion (for example, a side wall portion) of the air cleaner body 36 of the air cleaner 35.

  The exhaust gas amount control valve 84 is controlled to be switched between the first state and the second state by the ECU 57 in accordance with the operating state of the engine 20. In the first state (for example, energized state) of the exhaust gas amount control valve 84, the first port 84a and the second port 84b are electrically connected, so that the upstream side passage portion 82a and the downstream side of the exhaust gas introduction passage 82 are connected. The exhaust gas is introduced into the container 65 of the canister 64 through the passage portion 82b. Further, in the second state (for example, the non-energized state) of the exhaust gas amount control valve 84, the second port 84b and the third port 84c are electrically connected to each other, whereby the air introduction passage 86 and the exhaust gas introduction passage 82 are connected. The air (air) is introduced into the container 65 of the canister 64 through the downstream passage portion 82b.

  Although not shown, the throttle body 32 is provided with a bypass passage (not shown) that bypasses the throttle valve 33. The bypass passage is provided with an idle speed control valve (ISC valve) 90 for controlling the amount of idle air flowing through the bypass passage. The ISC valve 90 is controlled to be opened and closed by the ECU 57 in accordance with the operating state of the engine 20.

  According to the evaporative fuel processing device 60, a part of the exhaust gas of the engine 20 is introduced into the container 265 of the canister 64. Thereby, the purge efficiency can be improved by using exhaust gas (so-called EGR gas) as a medium for purging the evaporated fuel in the container 265.

  Further, by using the exhaust gas as a medium for purging the evaporated fuel in the container 265 of the canister 64 and performing the purging, purging can be performed more efficiently than when the atmosphere is used as the purging medium. Therefore, the canister 64 is also effective for downsizing. In other words, the evaporated fuel adsorbed on the adsorbent 66 in the container 65 of the canister 64 is purged by being desorbed by being vaporized together with the air. However, when purging with the atmosphere, purging the evaporated fuel is endothermic. This is a reaction, and the temperature is lowered, and the evaporated fuel is less likely to be vaporized, so that the purge efficiency is lowered. On the other hand, when purging with exhaust gas, the canister 64 can be heated by the heat of the exhaust gas without using a special heating device. Therefore, the evaporated fuel is easily vaporized, and the purge efficiency can be improved. Further, by performing the purge using the exhaust gas, the pressure difference between the exhaust gas pressure and the intake pressure is increased, so that the purge amount can be increased.

  Further, an exhaust gas amount control valve 84 that opens and closes the exhaust gas introduction passage 82 by being opened and closed by the ECU 57 is provided in the exhaust gas introduction passage 82 that introduces the exhaust gas into the container 265 of the canister 64. As a result, the amount of exhaust gas flowing through the exhaust gas introduction passage 82 can be controlled.

  The exhaust gas amount control valve 84 is an electromagnetically driven three-way switching valve configured to be switchable between a state in which exhaust gas is introduced into the container 265 of the canister 64 and a state in which air is introduced into the container 265. . Thereby, according to the operating state of the engine 20, it is possible to appropriately switch between a state in which exhaust gas is introduced into the container 265 of the canister 64 and a state in which air is introduced into the container 265.

  For example, in an operating state such as when the engine 20 is idling, decelerating, or fully opened, problems such as misfire and insufficient output are more likely to occur as exhaust gas is taken into the container 65 of the canister 64 and thus into the intake passage 31. By introducing the atmosphere into the container 65 of the canister 64 instead of the exhaust gas, the above problem can be improved. Further, by controlling the engine output by controlling the exhaust gas amount control valve 84 to change the ratio of air and exhaust gas, the pumping loss (loss due to the intake negative pressure generated when the engine 20 takes in air) is reduced. It is possible to reduce and improve fuel consumption.

  Further, by introducing the air (air) on the clean side of the air cleaner body 36 of the air cleaner 35 into the container 65 of the canister 64, the intrusion of dust into the container 65 of the canister 64 can be prevented or reduced.

  The canister 64 in the evaporative fuel processing apparatus 60 in this embodiment is provided in the air cleaner 35 as in the first embodiment (see FIGS. 1 and 2), but is provided separately from the air cleaner 35. You can also.

  The present invention is not limited to the above-described embodiments, and modifications can be made without departing from the gist of the present invention. For example, the present invention can be applied not only to a canister of a fuel injection type engine system but also to a canister of a carburetor type engine system. Further, the present invention is not limited to a canister in a motorcycle, and is preferably applied as a canister of a vehicle in which a fuel tank is disposed at a higher position than the engine, but the fuel tank is disposed at a position lower than the engine. It can also be applied to canisters of other vehicles. Further, the vehicle component parts are not limited to the intake system parts such as an air cleaner, the seat for seating, the vehicle body frame, and the vehicle body cover, but may be other vehicle component parts. Further, the container shape of the canister, the internal structure, the arrangement of each port, the attachment form of the container, and the like can be appropriately changed according to the installation site of the canister.

1 is a schematic configuration diagram illustrating a fuel injection type engine system for a motorcycle according to a first embodiment of the present invention. It is sectional drawing which shows an air cleaner. It is sectional drawing which shows the air cleaner concerning Example 2 of this invention. It is sectional drawing which shows the air cleaner concerning Example 3 of this invention. FIG. 6 is a side view showing a partially broken main part of a motorcycle according to a fourth embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line VI-V1 in FIG. 5. It is a side view which shows the motorcycle concerning Example 5 of this invention. It is a perspective view which shows a vehicle body frame. It is sectional drawing which shows the principal part of a vehicle body frame. It is a side view which shows the motorcycle concerning Example 6 of this invention. It is sectional drawing which shows the step cover part of a vehicle body cover. It is sectional drawing which shows the air cleaner concerning Example 7 of this invention. It is a schematic block diagram which shows the engine system concerning Example 8 of this invention.

Explanation of symbols

12, 412, 512, 612 Fuel tank 20, 420, 520, 620 Engine 35, 235, 335 Air cleaner (vehicle components, intake system components)
36,236,336 Air cleaner body (intake passage forming member)
57 ECU (control device)
66 Adsorbent 64,264,364,464,564,664 Canister 65,265,365,465,565,665 Container 70,270,370,470,570,670 Evaporative fuel introduction port 71,271,371,471 571,671 Purge port 77 On-off valve 400,500,600 Motorcycle (vehicle)
480, 680 Seat for seat (vehicle component)
485, 585, 685 Body frame (vehicle component)
586 Pipe material 690 Body cover (vehicle component)
691 Step cover portion 82 Exhaust gas introduction passage 84 Exhaust gas amount control valve 86 Air introduction passage 237 Lower wall portion (partition wall)
735 Air cleaner 773 Purge opening 776 Filter member 780 Purge amount control valve (Electromagnetically driven three-way switching valve)

Claims (21)

A canister comprising an adsorbent that adsorbs evaporated fuel generated in a fuel tank of a vehicle and desorbed by the intake negative pressure generated in the intake passage of the engine of the vehicle,
A canister characterized by being provided as a part of a vehicle component constituting the vehicle. The canister according to claim 1,
The canister is characterized in that the vehicle component is an intake system component of the engine. The canister according to claim 2, wherein
A canister characterized in that the intake system component is an air cleaner. The canister according to claim 2 or 3,
A canister characterized in that a part of an intake passage forming member that forms an intake passage in the intake system part is also used as a part of a container that houses the adsorbent. The canister according to claim 2 or 3,
A canister characterized in that a container for housing the adsorbent is formed integrally with an intake passage forming member forming an intake passage in the intake system component. The canister according to claim 1,
A canister characterized in that the vehicle component is a seat for seating. The canister according to claim 6, wherein
A canister characterized in that it is built in the seat for seating. The canister according to claim 1,
A canister characterized in that the vehicle component is a body frame. The canister according to claim 8, wherein
A canister characterized in that the adsorbent is accommodated in a pipe material constituting the body frame. The canister according to claim 1,
A canister characterized in that the vehicle component is a vehicle body cover. The canister according to claim 10, wherein
A canister is provided in a step cover portion of the vehicle body cover. A canister according to any one of claims 1 to 11,
An evaporative fuel introduction port that is provided in a container that accommodates the adsorbent and communicates with the fuel tank is disposed at a position on the fuel tank side when the vehicle component is mounted on the vehicle. Canister. A canister according to any one of claims 1 to 12,
A purge port that is provided in a container that accommodates the adsorbent and communicates with the intake passage is disposed at a position on the intake passage side when the vehicle component is mounted on the vehicle. Canister. The canister according to claim 13 or 14,
A canister characterized in that an opening / closing valve for opening / closing the evaporative fuel introduction port or the purge port is opened / closed by being controlled by a control device. A canister according to any one of claims 2 to 5,
A canister having a purge opening communicating between the inside of the container for containing the adsorbent and the inside of the intake passage of the intake passage forming member that forms the intake passage in the intake system component. The canister according to claim 15, wherein
The canister, wherein the purge opening is formed in a partition wall that partitions the inside of the container and the inside of the intake passage of the intake passage forming member. The canister according to claim 15 or 16,
A canister characterized in that the purge opening is provided with a filter member having air permeability and restricting the outflow of the adsorbent to the intake passage. The canister according to any one of claims 15 to 17,
A canister having a purge amount control valve for opening and closing the purge opening by opening and closing the purge opening by a control device. A canister according to any one of claims 1 to 18,
An evaporative fuel processing apparatus that adsorbs evaporative fuel generated in the fuel tank with an adsorbent of the canister and purges the adsorbed evaporative fuel into the intake passage;
An evaporative fuel processing apparatus characterized in that a part of the exhaust gas of the engine is introduced into a container of the canister. The evaporated fuel processing apparatus according to claim 19,
Evaporation characterized in that an exhaust gas amount control valve for opening and closing the exhaust gas introduction passage is provided in the exhaust gas introduction passage for introducing exhaust gas into the container of the canister by being controlled to be opened and closed by a control device. Fuel processor. The evaporated fuel processing device according to claim 20,
The exhaust gas amount control valve is an electromagnetically driven three-way switching valve configured to be switchable between a state in which exhaust gas is introduced into a container of the canister and a state in which air is introduced into the container. Evaporative fuel processing device.

Images