JP6320947B2 - Evaporative fuel processing equipment - Google Patents

Description

  The present invention relates to an evaporated fuel processing device mounted on a vehicle.

  2. Description of the Related Art Conventionally, a vehicle such as an automobile is equipped with an evaporative fuel processing device that processes evaporative fuel such as gasoline vapor generated in a fuel tank. The evaporative fuel processing apparatus includes a canister that adsorbs and desorbs evaporative fuel, and a blocking valve that blocks an evaporative fuel passage between the fuel tank and the canister (see Patent Document 1). As the block valve, one constituted by an electromagnetic valve is known. Specifically, in the blockade valve, the valve body is moved relative to the valve seat using the magnetic force of the electromagnet, and the evaporated fuel passage is switched between the open state and the closed state.

JP 2013-113197 A

  By the way, in the blocking valve, the hitting sound of the valve body is generated with the valve operation due to the characteristics of the electromagnetic valve. For this reason, in order to prevent such a hit sound from sounding, the sealing valve is required to be installed inside the vehicle separately from the canister. However, when the blocking valve is attached to the inside of the vehicle separately from the canister, the mounting work for mounting the evaporated fuel processing device on the vehicle becomes complicated.

  The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is to provide an evaporative fuel in an evaporative fuel processing apparatus mounted on a vehicle having a canister and a sealing valve. An object of the present invention is to facilitate mounting work when mounting the processing apparatus on a vehicle.

  In order to solve the above-described problems, the evaporated fuel processing apparatus according to the present invention takes the following means. That is, an evaporative fuel processing apparatus according to a first aspect of the present invention includes a canister that adsorbs and desorbs evaporative fuel, an evaporative fuel passage that allows evaporative fuel to flow in and out between the canister and a fuel tank, and the evaporative fuel. A sealing valve that opens and closes the inflow and outflow of evaporated fuel in the fuel passage, and controls the opening and closing of the inflow and outflow of evaporated fuel by moving the relative position of the valve body with respect to the valve seat by a motor. An electric on-off valve is provided, and the electric on-off valve is housed and supported in a valve housing integrated with a canister case forming the exterior of the canister.

  According to the fuel vapor processing apparatus according to the first aspect of the invention, the electric on-off valve is housed and supported in the valve housing integrated with the canister case that forms the exterior of the canister. Therefore, the canister and the electric on-off valve are integrated. Can be treated as a typical one. As a result, when the evaporative fuel treatment device is mounted on the vehicle, the canister and the electric on-off valve can be mounted as a single unit. As a result, it is possible to easily perform an operation when the fuel vapor treatment apparatus is mounted on a vehicle. Furthermore, simplification of piping can be achieved by a single set of configuration of the canister and the electric on-off valve. As a result, the pressure loss due to the piping can be reduced, and the oil supply resistance when supplying fuel to the fuel tank can be reduced.

According to a second aspect of the present invention, there is provided the fuel vapor processing apparatus according to the first aspect, wherein the valve housing is provided with an opening port for allowing the fuel vapor to flow into and out of the canister. The opening port is directly connected to the tank port of the canister. According to the fuel vapor processing apparatus according to the second aspect of the present invention, since the opening port provided in the valve housing is directly connected to the tank port of the canister, it is possible to reduce an extra gap between the sealing valve and the canister. Can do. As a result, when the block valve is closed, the amount of evaporated fuel remaining between the block valve and the canister can be reduced. For this reason, it can lead to the reduction of the passage area of piping, and the miniaturization of the motor which moves a valve body can also be achieved.

  According to a third aspect of the present invention, there is provided the fuel vapor processing apparatus according to the first or second aspect of the present invention, wherein the valve housing serves as the fuel vapor passage bypassing the electric on-off valve. A sub-passage is provided, and the sub-passage is provided with a mechanical on-off valve that controls opening / closing of the inflow / outflow of the evaporated fuel in accordance with the pressure of the evaporated fuel. It is the structure of being accommodated and supported by the housing. According to the fuel vapor processing apparatus according to the third aspect of the invention, the mechanical on-off valve provided in the sub passage is accommodated and supported by the valve housing, so that the canister and the sealing valve having the mechanical on-off valve are integrated. Can be treated as a thing. Thereby, while the mechanical on-off valve can be provided in the blocking valve, it is possible to simplify the operation when the evaporated fuel processing apparatus is mounted on the vehicle.

  An evaporated fuel processing apparatus according to a fourth aspect of the present invention is the evaporated fuel processing apparatus according to any one of the first to third aspects of the invention, wherein the valve housing supports the motor of the electric on-off valve. The motor support range to be set is set, and the portion of the valve housing connected to the canister case is set to a portion of the valve housing where the motor support range is excluded. According to the fuel vapor processing apparatus according to the fourth aspect of the present invention, the location where the valve housing is coupled to the canister case is set in the portion of the valve housing where the motor support range is removed. As a result, it is possible to make it difficult to transmit sound and vibration generated by the motor to the canister, and it is possible to reduce noise and vibration while enjoying the merits of providing the motor.

It is an external appearance perspective view which shows the external appearance regarding an evaporative fuel processing apparatus. It is a mimetic diagram showing typically an engine system carrying an evaporative fuel processing device. It is a perspective view which shows a blocking valve. It is a left view which shows a blocking valve. It is a top view which shows a blocking valve. It is a bottom view which shows a blocking valve. FIG. 7 is a cross-sectional view taken along line (VII)-(VII) in FIG. 4. FIG. 6 is a cross-sectional view taken along line (VIII)-(VIII) in FIG. 5. It is sectional drawing which shows the valve closing state of a motor operated valve. It is sectional drawing which shows the valve opening state of a motor operated valve.

  Hereinafter, an embodiment for carrying out an evaporative fuel processing apparatus according to the present invention will be described. The external perspective view of FIG. 1 shows the external appearance of the evaporated fuel processing device 30 in which the canister 40 and the blocking valve 50 are integrated. The schematic diagram of FIG. 2 schematically shows the engine system 10 on which the evaporated fuel processing device 30 is mounted. The evaporative fuel processing device 30 is incorporated in an engine system 10 of a vehicle such as an automobile. As shown in FIG. 2, the engine system 10 includes an engine 11 and a fuel tank 12 that stores fuel supplied to the engine 11. The fuel tank 12 is provided with an inlet pipe 13. The inlet pipe 13 is a pipe that introduces fuel into the fuel tank 12 from a fuel filler port at the upper end thereof, and a tank cap 14 is detachably attached to the fuel filler port. The upper end portion of the inlet pipe 13 and the gas layer portion in the fuel tank 12 are communicated by a breather pipe 15.

  A fuel supply device 16 is provided in the fuel tank 12. The fuel supply device 16 includes a fuel pump 17 that sucks and pressurizes and discharges fuel in the fuel tank 12, a sender gauge 18 that detects the liquid level of the fuel, and a tank internal pressure sensor that detects a tank internal pressure as a relative pressure to the atmospheric pressure. 19 etc. The fuel pumped up from the fuel tank 12 by the fuel pump 17 is supplied to the engine 11 through the fuel supply passage 20, specifically, to a delivery pipe 22 having an injector (fuel injection valve) 21 corresponding to each combustion chamber. Then, the fuel is injected from each injector 21 into the intake passage 23. In the intake passage 23, an air cleaner 24, an air flow meter 25, a throttle valve 26, and the like are provided.

  The fuel vapor processing apparatus 30 includes a vapor passage 31, a purge passage 32, and a canister 40, and a sealing valve 50 is integrally attached to the canister 40. This blocking valve 50 is provided in the vapor passage 31 and opens and closes the inflow and outflow of evaporated fuel (for example, gasoline vapor). An upstream end portion of the vapor passage 31 is communicated with an air layer portion in the fuel tank 12. The downstream end of the vapor passage 31 communicates with the inside of the canister 40. The upstream end portion of the purge passage 32 communicates with the inside of the canister 40. A downstream end portion of the purge passage 32 communicates with a passage portion on the downstream side of the throttle valve 26 in the intake passage 23.

  The canister 40 performs adsorption / desorption of the evaporated fuel. The canister 40 includes a canister case 41 that forms an exterior. The canister case 41 is loaded with activated carbon as an adsorbent for adsorbing and desorbing the evaporated fuel. The canister 40 is provided with three ports, a tank port 43, a purge port 44, and an atmospheric port 45, for adsorbing and desorbing the evaporated fuel. These three ports 43, 44 and 45 are set to have a cylindrical port shape communicating with the inside of the canister case 41. The tank port 43 is a port connected to the vapor passage 31 that communicates with the fuel tank 12. The purge port 44 is a port connected to the purge passage 32 that communicates with the engine 11. The atmospheric port 45 is a port connected to the atmospheric passage 36 opened to the atmosphere.

  An ORVR valve (On Board Refueling Vapor Recovery valve) 27 and a fuel cut-off valve (Cut Off Valve) 28 are provided at the upstream end portion of the vapor passage 31 in the air layer portion in the fuel tank 12. The ORVR valve 27 is a full tank regulating valve constituted by a float valve that opens and closes by fuel buoyancy. The fuel tank 12 is opened when the fuel level of the fuel tank 12 is below the full level, and the fuel level is filled by refueling. When the tank level rises, the float valve closes and the vapor passage 31 is shut off. When the vapor passage 31 is blocked by the ORVR valve 27, the fuel is filled up to the inlet pipe 13, the auto-stop mechanism of the fuel gun is operated, and fueling is stopped. The fuel cut-off valve 28 is formed of a float valve that opens and closes by the buoyancy of the fuel, and is normally held in an open state. When the vehicle rolls over, the fuel cut-off valve 28 is closed. Block outflow to 31.

  A purge valve 35 is interposed in the purge passage 32. The purge valve 35 is subjected to so-called purge control with a valve opening amount corresponding to a purge flow rate calculated by an engine control unit (ECU). The purge valve 35 includes a stepping motor, for example, and can adjust the valve opening amount by controlling the stroke of the valve body. Note that the purge valve 35 is provided with an electromagnetic solenoid, and closes in a non-energized state and opens when energized. The canister 40 communicates with an atmospheric passage 36 that is open to the atmosphere. An air filter 37 is interposed in the middle of the atmospheric passage 36.

  When the evaporated fuel in the fuel tank 12 enters the canister 40 through the vapor passage 31, it is adsorbed by the adsorbent (activated carbon) in the canister 40. For example, when the tank internal pressure of the fuel tank 12 becomes higher than the atmospheric pressure while the vehicle is stopped, the electric valve 60 of the blocking valve 50 is opened, and the evaporated fuel in the fuel tank 12 is removed from the canister 40 through the vapor passage 31. Adsorb to the adsorbent inside. Further, when a predetermined purge condition is satisfied while the vehicle is running, the purge valve 35 is opened, and the intake negative pressure of the engine 11 is applied to the canister 40 via the purge passage 32. Then, the evaporated fuel adsorbed by the adsorbent in the canister 40 is desorbed from the adsorbent, and the desorbed evaporated fuel is purged to the intake passage 23 together with the air sucked from the atmospheric passage 36 and burned in the engine 11. Is done.

  The vapor passage 31 corresponds to the evaporated fuel passage according to the present invention. The vapor passage 31 allows the evaporated fuel to flow in and out between the canister 40 and the fuel tank 12. Here, a sealing valve 50 integrated with the canister 40 is provided on the vapor passage 31 side of the canister 40. The blocking valve 50 opens and closes the vapor passage 31 through which vaporized fuel flows into and out of the canister 40 through the vapor passage 31. The sealing valve 50 is integrated with the canister 40 as will be described later. The blocking valve 50 includes an electric valve 60 as an electric on-off valve and a relief valve 80 as a mechanical on-off valve. Here, the motor-operated valve 60 is housed and supported by a first housing tube portion 55 (a motor-operated valve housing tube portion) that forms part of the valve housing 51. The relief valve 80 is housed and supported by a second housing cylinder 56 (relief valve housing cylinder) that forms part of the valve housing 51.

  Next, a specific structure of the blocking valve 50 will be described. FIG. 3 is a perspective view of the blocking valve 50. 4 is a left side view of the blocking valve 50, and FIG. 5 is a plan view of the blocking valve 50. 6 is a bottom view of the blocking valve 50, FIG. 7 is a sectional view taken along line (VII)-(VII) in FIG. 4, and FIG. 8 is a sectional view taken along line (VIII)-(VIII) in FIG. FIG. 9 is a cross-sectional view showing the closed state of the motor-operated valve 60, and FIG. 10 is a cross-sectional view showing the opened state of the motor-operated valve 60. In the following description, the blocking valve 50 will be described based on the front, rear, left, right, top and bottom directions shown in the drawings.

  The valve housing 51 is a molded product made of resin. The valve housing 51 generally includes a first tube portion 53, a second tube portion 54, a first housing tube portion 55, and a second housing tube portion 56, and is integrally formed. The 1st pipe part 53 and the 2nd pipe part 54 are formed in the inside of a hollow circular tube. The 1st pipe part 53 and the 2nd pipe part 54 are formed by the same pipe diameter or substantially the same pipe diameter. The first pipe portion 53 is a pipe portion connected to the vapor passage 31 that communicates with the fuel tank 12. Therefore, the upstream end portion of the first pipe portion 53 is set as a vapor opening port 57. The vapor opening port 57 is connected to the vapor passage 31.

The second pipe portion 54 is a pipe portion connected to the tank port 43 of the canister 40. Therefore, the downstream end portion of the second pipe portion 54 is set as a canister opening port 58. The canister opening port 58 corresponds to the opening port according to the present invention. The canister opening port 58 allows the evaporated fuel to flow from the vapor passage 31 toward the canister 40. The canister opening port 58 is formed as a downstream end portion of the second pipe portion 54. For this reason, the canister opening port 58 is formed integrally with the other components of the valve housing 51. The canister opening port 58 is directly connected to the tank port 43 of the canister 40. This direct connection is based on a well-known connection technique such as screwing of the canister opening port 58 to the tank port 43 or press fitting of the canister opening port 58 to the tank port 43. That is, the sealing valve 50 is directly and integrally connected to the tank port 43 of the canister 40 without an appropriate passage.

  As shown in FIG. 7, a first valve chamber 61 is formed in the rear end portion of the first housing cylinder portion 55. Further, the insides of both pipe portions 53 and 54 are in communication with each other via the first valve chamber 61. The opening on the first valve chamber 61 side of the first pipe portion 53 is a first valve port 63. The first valve port 63 is formed with an inner diameter that is slightly smaller than the inner diameter of the first pipe portion 53. The edge of the first valve port 63 is a valve seat 64. The inside of the first pipe portion 53 is a first passage portion 65 that extends along the same direction as the axial direction of the first valve port 63 and bends to the left. The inside of the second pipe portion 54 is on the opposite side to the first passage portion 65 side (rear side) of the first valve port 63, that is, the front side, along a right direction different from the axial direction (front-rear direction) of the first passage portion 65. The second passage portion 66 extends. An elbow-shaped main passage 67 is formed by the first passage portion 65 and the second passage portion 66.

  As shown in FIG. 8, a stepped portion 68 having a smaller inner diameter is formed concentrically at the lower end portion of the second housing cylinder portion 56. A hollow portion in the stepped portion 68 serves as a second valve port 69 that communicates with the second valve chamber 62 in the second housing cylinder portion 56. The second valve port 69 is communicated by a first passage portion 65 between the first pipe portion 53 and the second housing cylinder portion 56. On the end surface of the stepped portion 68 on the second valve chamber 62 side, a metal annular plate-like valve seat 72 is disposed concentrically.

  The inner diameter of the valve seat 72 is formed to be the same diameter or substantially the same diameter as the inner diameter of the stepped portion 68. The outer peripheral portion of the valve seat 72 is embedded in the second accommodating cylinder portion 56. A vertical passage portion 701 extending in the up-down direction is formed at the front end portion of the second housing cylinder portion 56. An upper end portion of the vertical passage portion 701 is communicated with the second valve chamber 62. The vertical passage portion 701 passes through the valve seat 72. A lateral passage portion 702 extending in the front-rear direction is formed at the left end portion of the first housing cylinder portion 55. A front end portion of the lateral passage portion 702 is communicated with the first valve chamber 61. The rear end portion of the horizontal passage portion 702 is communicated with the lower end portion of the vertical passage portion 701. That is, the second valve port 69, the second valve chamber 62, the vertical passage portion 701, the horizontal passage portion 702, and the first valve chamber 61 constitute a sub passage 70 that bypasses the first valve port 63. The sub passage 70 is provided inside the valve housing 51 and serves as an evaporative fuel passage that leads to the relief valve 80 so as to bypass the electric valve 60.

  The motor-operated valve 60 is configured in detail as shown in FIGS. 9 and 10. The motor-operated valve 60 is housed and supported in a first housing cylinder 55 that is a part of the valve housing 51. For this reason, the 1st accommodating cylinder part 55 is set as a motor support range which supports the stepping motor 73 of the motor operated valve 60 in the valve housing 51. That is, the sealing valve 50 is integrated with the canister 40 by connecting the canister opening port 58 of the second pipe portion 54 except the first accommodating cylinder portion 55 that is a motor support range to the canister case 41. Yes.

The electric valve 60 includes a stepping motor 73, a valve guide 74, a valve body 75, and a valve spring 76 . The stepping motor 73 is installed in the first housing cylinder portion 55 with its axial direction as the front-rear direction. The stepping motor 73 has an output shaft 77 that can rotate forward and backward. The output shaft 77 is directed rearward and is concentrically disposed in the first valve chamber 61 of the first housing cylinder portion 55. A male screw is formed on the outer peripheral surface of the output shaft 77. The stepping motor 73 corresponds to the motor according to the present invention. The stepping motor 73 is configured by a brushless motor. The valve body 75 corresponds to a valve body according to the present invention. In other words, the motor-operated valve 60 is a valve that controls the opening and closing of the evaporated fuel by moving the relative position of the valve body 75 with respect to the valve seat 64 by the stepping motor 73.

  The valve guide 74 is disposed so as to be movable in the axial direction, that is, the front-rear direction with respect to the first valve chamber 61. The valve guide 74 is prevented from rotating in the direction around the shaft by a non-rotating means (not shown) with respect to the peripheral wall portion (first housing cylinder portion 55) of the first valve chamber 61. The overhang portion 743 of the valve guide 74 is fitted to the inner wall surface of the first valve chamber 61 with a predetermined gap. The female screw on the inner peripheral surface of the cylindrical shaft portion 744 is screwed into the male screw of the output shaft 77 of the stepping motor 73. For this reason, the valve guide 74 is moved in the axial direction (front-rear direction) based on forward and reverse rotation of the output shaft 77. A feed screw mechanism 78 is constituted by the male screw of the output shaft 77 and the female screw on the inner peripheral surface of the valve body 75.

  Further, an auxiliary spring 79 made of a coil spring is interposed between the valve seat 64 and the overhang portion 743 of the valve guide 74. The auxiliary spring 79 suppresses backlash of the feed screw mechanism 78 by constantly urging the valve guide 74 forward. The valve body 75 includes a cylindrical tubular portion 751 and a valve plate portion 752 that closes the rear end opening of the tubular portion 751. An annular first seal member 753 made of a rubber-like elastic material is attached to the valve plate portion 752. The valve body 75 is disposed in the valve guide 74 so as to be concentric and movable in the front-rear direction. The first seal member 753 is opposed to the valve seat 64 so as to be able to come into contact therewith. The valve body 75 is connected to the valve guide 74 so as to be movable within a predetermined range in the axial direction (front-rear direction) while being prevented from rotating in the circumferential direction by the valve guide 74. The valve spring 76 is a coil spring, and always biases the valve body 75 in the closing direction with respect to the valve guide 74.

  In the open state of the electric valve 60, when the stepping motor 73 is closed, the output shaft 77 is rotated in the valve closing direction, and the valve guide 74 and the valve body 75 are moved backward via the feed screw mechanism 78. Moved. Then, the valve body 75 is seated on the valve seat 64 and is in a closed state. When the valve guide 74 is further moved rearward, the connection between the valve guide 74 and the valve body 75 is released. On the other hand, in the closed state of the electric valve 60, when the stepping motor 73 is opened, the output shaft 77 is rotated in the valve opening direction, and the valve guide 74 is moved forward via the feed screw mechanism 78. The Then, the valve body 75 is separated from the valve seat 64 and is opened.

  As shown in FIG. 8, the relief valve 80 is housed and supported in a second housing cylinder portion 56 that is a part of the valve housing 51. The relief valve 80 controls the opening and closing of the evaporative fuel flow through the sub passage 70. The opening / closing control of the flow of evaporative fuel by the relief valve 80 is in accordance with the pressure of the evaporative fuel. Although not shown in detail, the relief valve 80 has a positive pressure relief valve mechanism and a negative pressure relief valve mechanism concentrically. These valve mechanisms are arranged concentrically and vertically movable in the second valve chamber 62 of the second housing cylinder portion 56. That is, the relief valve 80 has a valve member 81 that can be moved up and down in the second valve chamber 62 of the second housing cylinder portion 56. When the valve member 81 moves downward, the valve member 81 presses the seal member 82 downward while being disposed below the valve member 81. The seal member 82 pressed downward is brought into close contact with the valve seat 83 and is closed. A coil spring 84 is disposed above the valve member 81. The coil spring 84 biases the valve member 81 downward in the valve closing direction. A cap member 85 that is prevented from being detached by a peripheral member 86 is provided on the upper side of the coil spring 84.

  According to the evaporated fuel processing device 30 described above, the following effects can be obtained. That is, according to the fuel vapor processing apparatus 30 described above, the motor-operated valve 60 is housed and supported by the valve housing 51 integrated with the canister case 41 that forms the exterior of the canister 40, so that the canister 40 and the motor-operated valve 60 are integrated. Can be treated as a typical one. As a result, when the fuel vapor processing apparatus 30 is mounted on a vehicle, the canister 40 and the motor-operated valve 60 can be mounted as an integral set. As a result, it is possible to easily perform the work when the evaporated fuel processing device 30 is mounted on the vehicle. Furthermore, simplification of piping such as the purge passage 32 can be achieved with a single set of the canister 40 and the motor-operated valve 60. As a result, the pressure loss due to the piping can be reduced, and the oil supply resistance when supplying fuel to the fuel tank 12 can be reduced.

  According to the fuel vapor processing apparatus 30 described above, the canister opening port 58 provided in the valve housing 51 is directly connected to the tank port 43 of the canister 40, so that an extra space between the sealing valve 50 and the canister 40 can be obtained. The gap can be reduced. As a result, when the blocking valve 50 is closed, the amount of evaporated fuel remaining between the blocking valve 50 and the canister 40 can be reduced. For this reason, it is possible to reduce the passage area of the piping such as the second pipe portion 54 and to reduce the size of the stepping motor 73 that moves the valve body 75.

  According to the fuel vapor processing apparatus 30 described above, the relief valve 80 provided in the sub passage 70 is accommodated and supported by the valve housing 51, so that the canister 40 and the closing valve 50 having the relief valve 80 are integrated. Can be handled. Thereby, while the relief valve 80 can be provided in the blockade valve 50, the operation | work at the time of mounting the evaporative fuel processing apparatus 30 in a vehicle can be achieved. Further, according to the fuel vapor processing apparatus 30 described above, the location where the valve housing 51 is coupled to the canister case 41 is the second pipe of the valve housing 51 excluding the first housing cylinder 55 which is the motor support range. The canister opening port 58 of the portion 54 is set. Thereby, it is possible to make it difficult to transmit the sound and vibration generated by the stepping motor 73 to the canister 40. This makes it possible to reduce noise and vibration while providing the stepping motor 73.

Incidentally, in the present invention, even those composed by changing and internal configuration of the fuel vapor processing apparatus is not limited to the configuration of the 30, for example, a canister 40 of the above-described embodiment Good. Further, the engine system 10 may also be configured by changing places as appropriate.

DESCRIPTION OF SYMBOLS 10 Engine system 11 Engine 12 Fuel tank 13 Inlet pipe 14 Tank cap 15 Breather pipe 16 Fuel supply device 17 Fuel pump 18 Sender gauge 19 Tank internal pressure sensor 20 Fuel supply passage 21 Injector 22 Delivery pipe 23 Intake passage 24 Air cleaner 25 Air flow meter 26 Throttle valve 27 ORVR valve 28 Fuel cut-off valve 30 Evaporated fuel processing device 31 Vapor path (evaporated fuel path)
32 Purge passage 35 Purge valve 36 Atmosphere passage 37 Air filter 40 Canister 41 Canister case 43 Tank port 44 Purge port 45 Atmosphere port 50 Sealing valve 51 Valve housing 53 First pipe portion 54 Second pipe portion 55 First housing cylinder portion 56 2 accommodating cylinder portion 57 vapor opening port 58 canister opening port 60 motorized valve (motorized on-off valve)
61 First valve chamber 62 Second valve chamber 63 First valve port 64 Valve seat 65 First passage portion 66 Second passage portion 67 Main passage 68 Stepped portion 69 Second valve port 70 Sub passage 701 Vertical passage portion 702 Horizontal passage Part 72 valve seat 73 stepping motor 74 valve guide 743 overhang part 744 cylinder shaft part 75 valve body ( valve body )
751 Cylindrical part 752 Valve plate part 753 Seal member 76 Valve spring 77 Output shaft 78 Feed screw mechanism 80 Relief valve (mechanical on-off valve)
81 Valve member 82 Seal member 83 Valve seat 84 Coil spring 85 Cap member 86 Peripheral member

Claims (7)

A canister that adsorbs and desorbs evaporated fuel;
An evaporative fuel passage for flowing evaporative fuel between the canister and the fuel tank;
A sealing valve that opens and closes the evaporative fuel flow in and out of the evaporative fuel passage,
The blocking valve is provided with an electric on-off valve that controls the opening and closing of the evaporative fuel flow by moving the relative position of the valve body with respect to the valve seat by a motor.
The electric on-off valve is housed and supported in a valve housing integrated with a canister case forming the exterior of the canister ,
The valve housing is provided with a vapor opening port connected to the evaporative fuel passage, and a canister opening port connected to the tank port of the canister,
The opening port for the canister is directly connected to the tank port of the canister,
The vaporized fuel processing apparatus , wherein the vapor opening port and the purge port of the canister are arranged in parallel . A canister that adsorbs and desorbs evaporated fuel;
An evaporative fuel passage for flowing evaporative fuel between the canister and the fuel tank;
A sealing valve that opens and closes the evaporative fuel flow in and out of the evaporative fuel passage,
The blocking valve is provided with an electric on-off valve that controls the opening and closing of the evaporative fuel by moving the relative position of the valve body with respect to the valve seat in the axial direction by a motor.
The electric on-off valve is housed and supported in a valve housing integrated with a canister case forming the exterior of the canister,
The canister is provided with a tank port and a purge port,
The evaporative fuel processing apparatus, wherein an axial direction of the motor is a direction along a longitudinal direction of a cross section of the canister case along an arrangement direction of the tank port and the purge port. A canister that adsorbs and desorbs evaporated fuel;
An evaporative fuel passage for flowing evaporative fuel between the canister and the fuel tank;
A sealing valve that opens and closes the evaporative fuel flow in and out of the evaporative fuel passage,
The blocking valve is provided with an electric on-off valve that controls the opening and closing of the evaporative fuel by moving the relative position of the valve body with respect to the valve seat in the axial direction by a motor.
The electric on-off valve is housed and supported in a valve housing integrated with a canister case forming the exterior of the canister,
The valve housing is provided with a sub-passage that bypasses the electric on-off valve and becomes the evaporated fuel passage,
The sub-passage is provided with a mechanical on-off valve having a valve mechanism for controlling the opening and closing of the inflow and outflow of the evaporated fuel according to the pressure of the evaporated fuel,
The canister is provided with a tank port and a purge port,
The evaporative fuel processing apparatus, wherein an axial direction of the valve mechanism is a direction along a short direction of a cross section of the canister case along an arrangement direction of the tank port and the purge port. A canister that adsorbs and desorbs evaporated fuel;
An evaporative fuel passage for flowing evaporative fuel between the canister and the fuel tank;
A sealing valve that opens and closes the evaporative fuel flow in and out of the evaporative fuel passage,
The blocking valve is provided with an electric on-off valve that controls the opening and closing of the evaporative fuel flow by moving the relative position of the valve body with respect to the valve seat by a motor.
The electric on-off valve is housed and supported in a valve housing integrated with a canister case forming the exterior of the canister,
In the valve housing, a motor support range for supporting the motor of the electric on-off valve is set,
The evaporated fuel processing apparatus, wherein a portion of the valve housing coupled to the canister case is set in a portion of the valve housing where the motor support range is excluded. In the evaporative fuel processing apparatus according to any one of claims 2, 3, and 4 ,
The valve housing is provided with an opening port for allowing the fuel vapor to flow into and out of the canister,
The evaporative fuel processing apparatus, wherein the opening port is directly connected to a tank port of the canister. The evaporative fuel processing apparatus according to any one of claims 1, 2, and 4 ,
The valve housing is provided with a sub-passage that bypasses the electric on-off valve and serves as the evaporated fuel passage.
The sub passage is provided with a mechanical on-off valve that controls opening / closing of the inflow / outflow of the evaporated fuel in accordance with the pressure of the evaporated fuel,
The evaporative fuel processing apparatus, wherein the mechanical on-off valve is accommodated and supported by the valve housing. In the evaporative fuel processing apparatus according to any one of claims 1, 2, and 3 ,
In the valve housing, a motor support range for supporting the motor of the electric on-off valve is set,
The evaporated fuel processing apparatus, wherein a portion of the valve housing coupled to the canister case is set in a portion of the valve housing where the motor support range is excluded.

Images