WO2002092989A1 - Module de traitement de combustible avec evaporation - Google Patents

Module de traitement de combustible avec evaporation Download PDF

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Publication number
WO2002092989A1
WO2002092989A1 PCT/JP2001/003958 JP0103958W WO02092989A1 WO 2002092989 A1 WO2002092989 A1 WO 2002092989A1 JP 0103958 W JP0103958 W JP 0103958W WO 02092989 A1 WO02092989 A1 WO 02092989A1
Authority
WO
WIPO (PCT)
Prior art keywords
canister
box
solenoid valve
shaped space
power supply
Prior art date
Application number
PCT/JP2001/003958
Other languages
English (en)
Japanese (ja)
Inventor
Takayuki Itou
Takashi Sugimoto
Kenji Suzuki
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Futaba Industrial Co.,Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha, Futaba Industrial Co.,Ltd. filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to JP2002590231A priority Critical patent/JPWO2002092989A1/ja
Priority to PCT/JP2001/003958 priority patent/WO2002092989A1/fr
Priority to US10/311,231 priority patent/US6769416B2/en
Publication of WO2002092989A1 publication Critical patent/WO2002092989A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold

Definitions

  • the present invention relates to an evaporative fuel processing module for absorbing evaporative fuel from a fuel tank or the like of a vehicle and preventing the evaporative fuel from being released into the atmosphere.
  • FIG. 1 is a block diagram showing a configuration of a conventional evaporative fuel processing system.
  • reference numeral 1 denotes a fuel tank
  • reference numeral 2 denotes a connecting pipe for connecting an engine manifold 3 of an engine (not shown) and a fuel tank 1 through a purge solenoid valve 4.
  • the connection pipe 2 is a connection pipe for supplying the evaporated fuel generated from the fuel tank 1 to an engine (not shown), and an adsorbent (activated carbon or the like) for adsorbing the evaporated fuel generated in the fuel tank 1 or the like in the middle thereof.
  • a pressure sensor 6 for measuring the entire pressure of the connection pipe 2 is connected to the canister 5, and a vacuum is introduced from the intake manifold 3 during a leak check of the evaporation system, which is normally open.
  • the canister vent solenoid valve 7, which closes to maintain the pressure, is connected.
  • 'Canis evening vent Solenoid pulp 7 has an intake manifold which is under negative pressure during operation.
  • Air filter 8 was connected to remove dust from the air supplied to the 3 side, and the canister 5 side was opened at positive pressure to pass through the canister 5 to remove evaporated fuel.
  • a one-way valve 9 that exhausts air and closes when negative pressure is connected is connected.
  • a one-way valve 10 is provided in the middle of the connecting pipe 2 between the canister valve 5 and the fuel tank 1, and a branch pipe 11 bypassing the free-way valve 10 is provided with a bypass solenoid valve.
  • an id valve 12 There is provided an id valve 12.
  • the one-way valve 10 has slightly more positive pressure on the fuel tank 1 side. When it becomes low, it is closed to maintain it, and when the fuel tank 1 side becomes the canister 5 side, that is, when it becomes a negative pressure or a more positive pressure than the atmosphere side, it becomes open and the fuel tank 1 becomes Side to return to the atmospheric pressure side.
  • the bypass solenoid valve 12 is normally closed, but is open at the time of the above-described leak check regardless of the state of the bypass valve 10. This is because if leak valve 10 is closed during leak check, the target of leak check is limited to connecting pipe 2 between canister 5 and intake manifold 3, but this is avoided. By opening the bypass solenoid valve 12 as much as possible, the leak check can be expanded to the entire connection pipe 2 and the fuel tank 1.
  • the fuel tank 1 is provided with an inlet pipe 13 for adding fuel, and a cap 14 is detachably attached to an opening of the inlet pipe 13.
  • a leveling valve 15 is attached to one end of the connection pipe 2, and a liquid separator that prevents liquid fuel from moving from the fuel tank 1 to the canister 5 via the connection pipe 2 is connected to the connection pipe 2. There are 16 nights. Next, the operation will be described.
  • a negative pressure is generated in the intake manifold 3 of the engine (not shown).
  • the evaporative fuel adsorbed and held on the adsorbent (such as activated carbon) in the canister 5 is released by the air introduced through the air filter 8 so that the evaporative fuel can be removed from the engine (not shown). Purifies the adsorbent (activated carbon etc.) while supplying to the manifold 3 side.
  • the fuel in the fuel tank 1 is still high and the fuel evaporates energetically, but the evaporated fuel is used as the adsorbent (activated carbon) in the canister 5. Etc.).
  • the purge solenoid valve 7 disposed on the atmosphere side of the canister 5 is closed and the purge solenoid valve 7 is closed. 4 is opened for a certain period of time, and a negative pressure is introduced and maintained from the intake manifold 3 side.
  • the bypass solenoid valve 12 is opened, and the entire connection pipe 2 is connected to make a negative pressure. If the negative pressure is maintained, there is no leak, but if the pressure increases, there will be a leak somewhere in the entire closed system.
  • the parts such as the pressure sensor 6, the canister nozzle, the solenoid valve 7, the air filter 8, and the one-way valve 9 were all connected by piping around the canister 5.
  • the pipe connection work is inevitable in the mounting work of each part, and there has been a problem that it takes much time and effort.
  • connection part is likely to be disconnected when the vehicle is damaged due to an accident or the like.
  • the evaporative fuel is distributed to the above components. There was a problem that it adhered to the inside of the rubber connection part with the pipe, and gradually permeated into the atmosphere from the inside to the outside.
  • the present invention has been made to solve the above-mentioned problem, and simplifies the work of mounting parts, improves reliability, prevents fuel permeation from a connection part, and prevents a metal part of a part from evaporating fuel.
  • the purpose is to provide a processing module.
  • Examples of such an evaporative fuel processing system include those disclosed in Japanese Patent Application Laid-Open No. 9-25857 and Japanese Utility Model Application No. 5-174131. It does not solve the problem at the same time. Disclosure of the invention
  • the evaporative fuel treatment module includes a first box-shaped space provided in a first box-shaped space provided on the atmosphere side of the canister and adjacent to the canister, wherein the first box-shaped space and the first box-shaped space are provided.
  • An air filter is accommodated in a second box-shaped space provided adjacent to the canister, and the canister and the first gag-shaped space, and the first box-shaped space and the second box-shaped space are deviated from each other.
  • the one-way valve is fixed to the lid of the first box-shaped space, communicating with the opening formed in the wall.
  • the solenoid valve Since the solenoid valve is housed in the first box-shaped space, the canister valve The metal parts of the solenoid valve can be reliably prevented.
  • the lid of the first box-shaped space and the power supply connector of the cantilever vent solenoid valve are integrally formed.
  • the canister vent solenoid pulp is accommodated in the first box-shaped space with the power supply terminal of the canister vent solenoid pulp protruding from an opening of the first box-shaped space, and the power supply connector and The lid is attached to the opening of the first box-shaped space while being connected to the power supply terminal. Accordingly, the operation of attaching the lid to the opening of the first box-shaped space and the operation of connecting the connector and the terminal can be performed at the same time, thereby simplifying the operation.
  • the gap between the power supply terminal of the canister vent solenoid valve and the power supply connector integrally formed on the lid is filled with a port.
  • the fuel vapor treatment module according to the present invention is characterized in that a power supply connector integrally formed on a lid and a power supply terminal of a canister solenoid valve are separated from each other, and the power supply connector and the power supply of the canister solenoid pulp are separated from each other.
  • a connector terminal is provided to communicate with the vicinity of the power terminal, and one end of the connector terminal is connected to the power supply terminal of the cantilever vent solenoid valve and is filled with potting. Thereby, the connector terminal does not interfere with the porting operation, and the operability of the porting can be improved.
  • the lid of the first box-shaped space and the cantilever vent solenoid valve are integrally formed.
  • the components such as the cantilever vent solenoid valve are individually provided. This eliminates the need for the work of attaching to the vehicle, thereby simplifying the work.
  • An evaporative fuel processing module according to the present invention is provided with a
  • the lid of the one box-shaped space and the pressure sensor for detecting the internal pressure of the first box-shaped space are integrally assembled. This eliminates the need for piping equipment between the first box-shaped space and the pressure sensor, thereby simplifying the mounting work.
  • the opening of the first box-shaped space is covered with a cantilever vent solenoid valve. This eliminates the need to provide a lid member that closes the opening of the first box-shaped space, thereby reducing the number of parts and reducing manufacturing costs.
  • An evaporative fuel processing module secures a one-way valve disposed between a fuel tank and a canister, and a path between the fuel tank and the canister when the pair-valve is closed.
  • a bypass solenoid valve wherein a one-way valve is housed in a third box-shaped space provided on the fuel tank side of the canister and adjacent to the canister, and the third box-shaped space and A bypass solenoid valve is accommodated in a fourth box-shaped space provided adjacent to the canister, and the canister and the third box-shaped space, and the third box-shaped space and the fourth box-shaped space are accommodated.
  • the installation work can be completed simply by installing the above module on the vehicle, simplifying the installation work on the vehicle, and eliminating the need for pipe connection work. And adheres to the inside of the rubber pipes, etc., which had been used to prevent the permeation to the atmosphere side, and the bypass solenoid valve is housed in the fourth box-shaped space. Metal parts of the valve can be reliably prevented.
  • the lid of the fourth box-shaped space and the power supply connector of the bypass solenoid valve are integrally formed, and the power supply terminal of the bypass solenoid valve is opened in the opening of the fourth box-shaped space.
  • the bypass solenoid valve is housed in the fourth box-shaped space in a state where it is projected from the opening, and the opening of the fourth box-shaped space in a state where the power supply connector and the power supply terminal are connected.
  • the above-mentioned lid is attached to the above.
  • the third box-shaped space and the fourth box-shaped space are integrated and integrated, and the opening of the integrated space is covered with a two-way valve and a bypass solenoid valve.
  • the one-way valve and the bypass solenoid valve are integrally formed, and the opening and closing diaphragm of the one-way valve is opened and closed by a magnetic drive unit of the bypass solenoid valve. This eliminates the need for the mounting work for each valve, so that the mounting work can be simplified and the space can be saved.
  • FIG. 1 is a block diagram showing a configuration of a conventional fuel vapor processing system.
  • FIG. 2 is a block diagram of a fuel vapor processing module according to a first embodiment of the present invention.
  • FIG. 3 is a plan view partially showing the configuration.
  • FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 5 is a cross-sectional view showing Modification Examples 1 to 3 of Embodiment 1 of the evaporated fuel processing module according to the present invention.
  • FIG. 6 (a) is a cross-sectional view showing Modification 4 of Embodiment 1 of the evaporative fuel treatment module according to the present invention.
  • FIG. 6 (b) is a view taken along line BB in FIG. 6 (a).
  • FIG. 7 is a cross-sectional view showing a fifth modification of the first embodiment of the evaporated fuel processing module according to the present invention.
  • FIG. 8 is a sectional view showing a modified example 6 of the embodiment 1 of the evaporated fuel processing module according to the present invention.
  • FIG. 9 is a plan view partially showing a configuration of a second embodiment of the evaporated fuel processing module according to the present invention.
  • FIG. 10 is a sectional view taken along line XX of FIG.
  • FIG. 11 is a sectional view taken along the line XI—XI of FIG.
  • FIG. 12 is a cross-sectional view showing a first modification of the second embodiment of the evaporated fuel processing module according to the present invention.
  • FIG. 13 is a cross-sectional view showing a second modification of the second embodiment of the evaporated fuel processing module according to the present invention.
  • FIG. 2 is a diagram showing a fuel vapor processing module according to Embodiment 1 of the present invention.
  • FIG. 3 is a plan view partially showing the configuration
  • FIG. 3 is a sectional view taken along line III-III of FIG. 2
  • FIG. 4 is a sectional view taken along line IV-IV of FIG. Note that, among the components of the first embodiment, components that are common to the components in the conventional evaporative fuel processing system are given the same reference numerals even if they do not have the same shape, and the description of those portions will be omitted.
  • reference numeral 20 denotes an evaporated fuel processing module.
  • This evaporative fuel processing module 20 is a united construction of the canister 5, the pressure sensor 6, the canister vent solenoid pulp 7, the air filter 8, and the one-way valve 9 surrounded by the broken line A in FIG. It was done.
  • the canister 5 is connected to a large-capacity first container 21 and a small container disposed on the atmosphere side in communication with the first container 21 via a gap 22.
  • the second container 23 has a capacity, and an adsorbent (eg, activated carbon) 24 filled in both containers 21 and 23 and adsorbing the evaporated fuel generated in the fuel tank 1 shown in FIG. It is schematically configured.
  • a front chamber 25 for receiving steam from the fuel tank 1 is provided outside the wall 21 a of the first container 21, and the front chamber 25 and the first container 21 communicate with each other through an opening 26. ing.
  • a pressure sensor 6 for detecting the pressure in the front chamber 25 is attached to the front chamber 25 as shown in FIG.
  • the pressure sensor 6 is connected to the canister 5 via the front chamber 25.
  • a connecting portion 27 for connecting to the connecting pipe 2 on the fuel tank 1 side and a connecting portion 28 for connecting to the connecting pipe 2 on the side of the purge solenoid valve 4 are formed.
  • the second container 23 of the canister 5 is integrally formed on the outside of the wall 21b so as to share a part of the wall 21b of the large-capacity first container 21.
  • the gap 22 formed between the end of the wall 21b shared by the containers 21 and 23 and the wall 5a of the canister 5 facing the end is the evaporated fuel in the canister 5.
  • a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room 29, a canister vent solenoid valve 7 is provided inside the middle room
  • the cantilever vent solenoid valve 7 is generally composed of a magnetic drive unit 31 and a valve body 32, for example, formed by covering the PPS material, and both of them have a ⁇ ring (not shown). Are connected via The magnetic drive unit 31 has a cover 33 and a coil wound in the cover 33.
  • the cover 33 supports the terminal 37 so as to protrude outward from the opening 29 a of the middle chamber 29.
  • the valve body 32 has a first opening 38 a communicating with the second container 23 via the opening 30 and a second opening 38 b communicating with the internal space of the inner chamber 29. 8, a valve element 39 fixed to the tip of the plunger 36, and the valve element 39 always communicate with the first opening 38a and the second opening 38b of the valve sheet 38.
  • the spring 40 that urges in the direction.When the magnet is magnetized, the valve element 39 moves against the urging force of the spring 40 and the first opening 38 a of the valve seat 38. And the second opening 38b. 41 is interposed between the communicating portion 29b of the middle chamber 29 and the first opening 38a, and when the canister vent solenoid valve 7 is closed at the time of the above leak check, the canister 5 is closed. 0-ring to seal the side.
  • a lid 44 integrally formed with a connector 43 for connecting the terminal 37 is fixed to the opening 29 a of the middle chamber 29.
  • the waterproofness of the canister vent solenoid valve 7 installed in the middle room 29 is required.
  • a method such as vibration welding, bonding, or two-layer molding is suitably selected.
  • a potting agent is filled between the terminal 37 and the connector 43 to ensure the airtightness of the inner chamber 29.
  • a one-way valve 9 is formed in the opening 44 a of the lid 44. 4 5 is an exhaust pipe from the one-way valve 9.
  • a rear chamber (a second box-shaped space) 46 for accommodating the air filter 8 is fixed outside the wall 23 b of the second container 23 and the wall 29 b of the middle chamber 29.
  • the chamber 29 and the rear chamber 46 communicate with each other through an opening 29c.
  • Reference numeral 47 denotes an air communication pipe for introducing and discharging air passing through the air filter 8, and an air filter 8 is interposed between the air communication pipe 47 and the opening 29c of the middle chamber 29. It is configured to purify air.
  • the fuel in the fuel tank 1 is still high and the fuel evaporates energetically, but the evaporated fuel is used as the adsorbent (activated carbon) in the canister 5. Etc.).
  • the intake manifold 2 is under negative pressure while the engine is running, it is adjacent to Canis Evening 5 without piping.
  • the vent solenoid valve 7 is closed and the purge solenoid valve 4 is opened for a certain period of time, and a negative pressure is introduced from the index manifold 3 to maintain the pressure. If the negative pressure is maintained, there is no leakage, but if the pressure rises, there will be a leak somewhere in the entire sealed connection pipe 2.
  • each component indicated by the broken line A shown in FIG. 1, that is, the canister 5 and the pressure sensor 6, the canister pen and the solenoid valve 6, the air filter 8, and the one-way By unifying the valve 9 into one module without pipe connection, the installation work can be completed simply by mounting the module on the vehicle, so that the installation work on the vehicle can be simplified and However, it can be fundamentally prevented from adhering to the inside of a rubber pipe or the like which has been used conventionally and gradually permeating to the atmosphere side.
  • the connector 43 and the lid 44 are integrally formed, the operation of attaching the lid 43 to the opening 29 a of the middle chamber 29 of the lid 44 and the connector 4 3 And the connection work with the terminal 37 can be performed simultaneously, so that the work can be simplified.
  • the canister evening solenoid valve 7 since the canister evening solenoid valve 7 is housed in the middle room 29 provided adjacent to the canister evening 5, the conventional canister wearing a snow melting agent wound up during traveling is worn. Unlike the evening solenoid valve 7, the environmental conditions relating to water are greatly reduced, so that the metal parts of the canyon evening solenoid valve 7 can be effectively prevented. Accordingly, the metal parts of the cantilever vent solenoid valve 7 need only be plated to a degree that does not cause mackerel before being housed in the middle room 29 during the manufacturing process, eliminating the need for expensive plating. Manufacturing costs can be reduced.
  • the canister pentosolenoid valve 7 as a whole is formed of a PPS having the same coefficient of thermal expansion as that of the coil wire constituting the coil 34, thereby reducing the conventionally generated coil. Since wire breakage can be prevented, maintenance costs can be reduced. Modification 1 of Embodiment 1 1.
  • FIG. 5 is a cross-sectional view showing a part of a first modification of the first embodiment shown in FIGS. 2 to 4.
  • reference numeral 48 denotes a connector terminal having one end 48 a projecting into the connector 43 and the other end 48 b wired to the vicinity of the terminal 37.
  • the other end 48 b of the connector terminal 48 is connected to the terminal 37 of the cantilever solenoid valve ⁇ ⁇ ⁇ by soldering, and then the area around the terminal 37 is filled by potting to fill the inner chamber 2. 9 to ensure airtightness. In this case, the connector terminal does not interfere with the potting operation, and the operability of the porting can be improved. Modification 2 of Embodiment 1 2.
  • valve seat 38 of the canister vent solenoid valve 7 and the wall of the inner chamber 29 fixed to the second container 23 constituting the canister 5 are separated from each other. May be integrally formed.
  • one wall of the middle chamber 29 is By integral molding with 38, the use of 0-ring 41 shown in Fig. 4 can be eliminated. Modification of Embodiment 1 3.
  • FIG. 4 shows a configuration in which the coil wire is prevented from being broken by using PPS as a material for forming the cantilever vent solenoid valve 7. The same applies to FIG.
  • the terminal 37 of the cantilever vent solenoid valve 7 is passed directly into the connector 43 integrally formed on the cover body 44, and the connector 43 is connected to the terminal.
  • the cover 43 and the cover 44 may be integrally formed.
  • FIGS. 6 (a) and 6 (b) show a unit U1 in which a cantilever valve 7, a connector 43 and a lid 44 are integrally formed.
  • the work of separately mounting the canister solenoid valve 7 and the like is not required, so that the operation can be simplified.
  • a pair of engaged portions 49 on the side of the canister 5 and a pair of engaged portions 5 which are locked to the ends of the engaged portions 49 and which hang down from the lid 44 of the unit U1.
  • mounting work can be simplified by snap fitting when mounting unit U1 to the varnish 5 side. Modification of Embodiment 1 5.
  • the pressure sensor 6 is installed in the front room 25 under the same pressure as the canister 5, but may be installed in the middle room 29 under the same pressure as the canister 5.
  • FIG. 7 shows a unit U2 in which a pressure sensor 6 is integrally mounted on a integrally formed canister vent solenoid valve 7, a connector 43, and a lid body 44 to form a unit.
  • the connector 43 and the pressure sensor 6 are mounted on the lid 44, and the canister vent solenoid valve 7 is arranged below the lid 44.
  • the pressure sensor 6 detects the pressure in the middle chamber 29 communicating with the canister 5, and is integrated with the lid 44 or the like to form a gap between the middle chamber 29 and the pressure sensor 6. This eliminates the need for piping equipment and simplifies installation work.
  • the terminal 51 of the pressure sensor 6 can be connected to a power supply device (not shown) via the connector 43. Therefore, the number of connectors for the terminal 51 of the pressure sensor 6 and the terminal 37 of the cantilever vent solenoid valve 7 can be reduced by using the shared connector 43, and the manufacturing cost can be reduced. Modification of Embodiment 1 6.
  • the configuration is such that the metal part of the cantilever vent solenoid valve 7 is protected by completely embedding the cantilever vent solenoid valve 7 in the casing fixed to the canister 5.
  • Kani The metal parts of the pent solenoid valve 7 may be fully molded.
  • FIG. 8 shows a cantilever vent solenoid valve ⁇ ⁇ in which the magnetic drive unit 31 is fully molded.
  • the magnetic drive section 31 covered by the full mold section 52 is exposed to the outside, and the valve body 32 is embedded in the middle chamber 29. Further, between the outside of the full-mold part 52 and the opening part 29 d of the middle chamber 29, a 0-ring 53 for ensuring the tightness of the middle chamber 29 is provided.
  • the mold itself for the magnetic drive unit 31 of the cantilever pen solenoid valve can be eliminated or inexpensive by the full mold unit 52, so that harmful substances contained in the mold can be eliminated.
  • the use of hexavalent chrome can be avoided or reduced.
  • FIG. 9 is a plan view partially showing a configuration of a second embodiment of an evaporative fuel treatment module according to the present invention.
  • FIG. 10 is a cross-sectional view taken along line X--X of FIG.
  • FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. Note that, of the components of the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description of those components will be omitted.
  • the feature of the second embodiment is that the above-described evaporated fuel processing module 20 is 1 Connect the canister 5, the pressure sensor 6, the canister solenoid valve 7, the air fill 8, the one-way valve 9, the one-way valve 10 and the bypass solenoid valve 12 surrounded by the broken line B in the figure. It is in a unit without piping connection.
  • the pressure sensor 6 is arranged near the one-way valve 10 as shown in FIG.
  • reference numeral 54 denotes a first front room (third box-shaped space) provided adjacent to the first container 21 of the canister 5 and containing a one-way valve 10; A second anterior chamber (fourth box-shaped space) provided adjacent to the first container 21 and accommodating the bypass solenoid valve 12.
  • the first front chamber 54 and the first container 21 communicate with each other through an opening 56, and the second front chamber 55 and the first container 21 communicate with each other through an opening 57.
  • Fillers 58a, 58b and 58c are provided in the first container 21 and the second container 23, and are formed in the first container 21 by the fill containers 58.
  • a pressure sensor 6 is mounted in the space.
  • Reference numeral 59 denotes a connector for supplying power to the bypass solenoid valve 12.
  • the connector 59 covers the opening 56 of the first front chamber 54 and the opening 57 of the second front chamber 55. It is integrally formed with the body 60.
  • the power supply terminal 61 of the bypass solenoid valve 12 projects from the second front chamber 55, and the lid 60 is connected to the opening 56 of the first front chamber 54 and the second front chamber 55. When it is attached to the opening 57 of the connector, it can pass through the connector 59.
  • Reference numeral 62 denotes a connecting portion for connecting the canister 5 and the fuel tank 1 by opening the bypass solenoid valve 12 at the time of a leak check.
  • a negative pressure is generated in the intake manifold 3 of the engine (not shown).
  • the negative pressure of the intake manifold 3 is introduced and the air communication pipe 4 7 Atmosphere passes through the air filter 8, the middle room 29, the second container 23, the gap 22, the first container 21 and the first front room 54, and the adsorbent (activated carbon, etc.) in the canister 5
  • the evaporative fuel that has been adsorbed and held in the tank is released to purify the adsorbent (eg, activated carbon) 24, and the released evaporative fuel is connected to the engine (not shown) from the connection part 28 via the purge solenoid valve 4. Supplied to the INT manifold 3 side.
  • the fuel in the fuel tank 1 is still high and the fuel evaporates energetically, but the evaporated fuel is used as the adsorbent (activated carbon) in the canister 5. Etc.).
  • the intake manifold 3 located at the atmospheric side of the canister 5 is closed by closing the cantilever vent pulp 7 because the intake manifold 3 is at a negative pressure in a steady running state. Negative pressure is introduced and maintained from the third side.
  • the bypass solenoid valve 12 is opened, and the whole system is connected to make a negative pressure. If the negative pressure is maintained, there is no leak, but if the pressure increases, there is a leak somewhere in the entire closed system.
  • the components indicated by the broken line B shown in FIG. 1, that is, the canister 5, the pressure sensor 6, the canister vent solenoid valve 7, the air filter 8, and the one-way By integrating the control valve 9, the two-way valve 10, and the bypass solenoid valve 12 into a single module without connecting pipes, the installation work can be completed simply by mounting the module on the vehicle. In addition to simplifying the work of attaching to the pipe, it is possible to fundamentally prevent it from adhering to the inside of rubber pipes and the like that were conventionally used and gradually transmitting to the atmosphere.
  • the opening 56 of the first front chamber 54 and the second front chamber 5 The lid 60 covering the opening 5 7 and the connector 59 of the bypass solenoid valve 12 are integrally molded, so that the lid 60 can be attached and the connector 59 connected. Since the connection work with (1) can be performed at the same time, the work can be simplified.
  • Fig. 12 shows a unit that integrally molds the one-way solenoid 10 and the bypass solenoid valve 12 and covers the opening of the integrated space by combining the third box-shaped space and the fourth box-shaped space.
  • G U 3 is shown.
  • the unit Wei Norelev 10 in the unit U 3 has an internal space 63, a check valve 64 that opens and closes due to a pressure difference between the internal space 63 and the canister 5, and an internal space 63 and a canister And a diaphragm (not shown) for opening and closing a communication path 65 communicating with the communication path 5.
  • the diaphragm (not shown) connects the internal space 63 and the canister 5 when the fuel tank 1 side has a large positive pressure, and returns to the atmospheric pressure side.
  • the check valve 64 communicates the internal space 63 with the canister 5 and returns to the atmospheric pressure side.
  • the solenoid valve 12 connects the fuel tank 1 and the canister 5 with a control signal from a control device (not shown) during a leak check.
  • a communication path (not shown) connecting to the fuel tank 1 is connected to the internal space 63.
  • the bypass solenoid valve 12 in the unit U 3 is connected to the internal space 6 A valve that shuts off a communication chamber 68 having a first opening 66 communicating with the third opening 63 a and a second opening 67 communicating with the canister 5 by the biasing force of the spring 70.
  • valve 71 and the valve 71 are moved against the biasing force of the spring 70 to make the entire connection pipe 2 a leak target.
  • a magnetic drive unit 72 a magnetic drive unit 72.
  • Reference numerals 73 and 74 denote ⁇ _rings mounted on the outer periphery of the bypass solenoid valve 12 so as to close the gap between the one-way valve 10 and the canister 5. It is a sealing member made of resin or the like for sealing the gap between the solenoid valves 12.
  • the unit U3 covers the opening of the space where the third box-shaped space and the fourth box-shaped space are combined and integrated, so that the third box-shaped space and the fourth box-shaped space are covered. Since there is no need to provide a separate lid member for closing the opening, the number of parts can be reduced, and the manufacturing cost can be reduced.
  • bypass solenoid valve 12 is made full-molded as shown in FIG. 12, so that the plating itself for the metal parts of the bypass solenoid valve 12 is eliminated or inexpensive. be able to.
  • FIG. 13 shows a unit U4 in which the two-way valve 10 and the bypass solenoid valve 12 are integrally formed, and the diaphragm 76 of the two-way valve 10 can be driven by the solenoid 77. .
  • the unit U4 is provided with a spring 78 that normally applies a biasing force to the diaphragm 76 to close the communication path 65.
  • the pressure on the fuel tank 1 side is a positive pressure, for example, 3 kPa or more
  • the diaphragm 76 is separated from the communication passage 65 by the positive pressure against the urging force of the spring 78, so that the internal space 6 is formed. 3 communicates with Canis Evening 5.
  • the check valve 64 is opened by the negative pressure on the fuel tank 1 side, for example, 1 kPa, and communicates the internal space 63 with the canister 5. Further, the diaphragm 76 can be opened by the solenoid 77 at the time of leak check regardless of the pressure of the fuel tank 1.
  • Reference numeral 79 denotes a communication chamber
  • reference numeral 80 denotes an opening for communicating the check valve 64 with the communication chamber 79
  • reference numeral 81 denotes a communication part which communicates with the purge solenoid valve 4
  • Reference numeral 2 denotes a communication part that communicates the internal space 63 with the fuel tank 1 side.
  • the solenoid valve 77 includes a coil portion 77a and an iron core portion 77b, and a peripheral portion 7 fixed to the case of the unit U4 outside the opening / closing diaphragm 76 when the unit U4 is assembled. 7c, and the opening / closing diaphragm 76 is provided with a plunger 76a and a valve body 76b.
  • the diaphragm is displaced by the plunger 76a being pulled by the magnetic force generated in the coil 77a of the solenoid valve 77 to the iron core 77b with the biasing force of the spring 78 to be pulled.
  • the valve body 76b is opened. That is, in this modification, a closing diaphragm 76 is opened and closed by a solenoid valve 77, and a plunger constituting a solenoid valve is provided on the diaphragm side.
  • the solenoid valve 77 is attached so that the plunger 76a provided on the opening / closing diaphragm 76 is fitted into the solenoid valve 77.
  • the one-way valve 10 and the bypass solenoid valve 12 are integrally formed, and the opening and closing diaphragm 76 of the one-way valve 10 is magnetically driven by the bypass solenoid valve 12.
  • the solenoid valve can directly drive the plunger without passing through a transmission member such as a rod. Can work. Also, since the plunger is a part of the diaphragm, there is no need for a mechanism for holding the plunger on the solenoid valve side, so that the solenoid valve can be simplified, and since the plunger is held by the diaphragm, it is newly installed. In addition, a mechanism for holding the plunger is not required, and the size of the entire apparatus can be reduced. Industrial applicability
  • an evaporative fuel treatment module that simplifies the work of mounting components, prevents fuel permeation from the connection portion, and prevents metal parts of the components.
  • This evaporative fuel treatment module is fully compliant with environmental regulations such as so-called evaporation regulations, which are becoming a global trend.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

L'invention concerne un module de traitement de combustible avec évaporation (20) comprenant un absorbeur de vapeurs d'essence (5), un détecteur de pressions (6), une électrovalve de la prise d'air dudit absorbeur (7), un filtre à air (8), et une valve de retenue (9) formant une unité sans être connectée par un tuyau, une valve à deux voies (10) et une électrovalve de dérivation (12) pouvant être inclues pour une unitisation.
PCT/JP2001/003958 2001-05-11 2001-05-11 Module de traitement de combustible avec evaporation WO2002092989A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002590231A JPWO2002092989A1 (ja) 2001-05-11 2001-05-11 蒸発燃料処理モジュール
PCT/JP2001/003958 WO2002092989A1 (fr) 2001-05-11 2001-05-11 Module de traitement de combustible avec evaporation
US10/311,231 US6769416B2 (en) 2001-05-11 2001-05-11 Evaporated fuel processing module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/003958 WO2002092989A1 (fr) 2001-05-11 2001-05-11 Module de traitement de combustible avec evaporation

Publications (1)

Publication Number Publication Date
WO2002092989A1 true WO2002092989A1 (fr) 2002-11-21

Family

ID=11737308

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/003958 WO2002092989A1 (fr) 2001-05-11 2001-05-11 Module de traitement de combustible avec evaporation

Country Status (2)

Country Link
JP (1) JPWO2002092989A1 (fr)
WO (1) WO2002092989A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10247935A1 (de) * 2002-10-15 2004-04-29 Daimlerchrysler Ag Kraftstoffbehälter und Ventileinheit
WO2010023806A1 (fr) * 2008-09-01 2010-03-04 三菱電機株式会社 Électrovanne de ventilation de récipient and couvercle protecteur pour celle-ci
US9103302B2 (en) 2010-08-25 2015-08-11 Mitsubishi Electric Corporation Dual electromagnetic valve and evaporated gas treatment system
US10605206B2 (en) 2014-12-25 2020-03-31 Aisan Kogyo Kabushiki Kaisha Fuel vapor processing apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60152057U (ja) * 1984-03-21 1985-10-09 いすゞ自動車株式会社 キヤニスタ
US5429099A (en) * 1994-09-08 1995-07-04 Lectron Products, Inc. Anti-permeation filter for vapor management valve
US5727532A (en) * 1995-05-19 1998-03-17 Siemens Electric Limited Canister purge system having improved purge valve control
JPH11182361A (ja) * 1997-12-19 1999-07-06 Toyota Motor Corp キャニスタの異音発生防止構造
JPH11280569A (ja) * 1998-03-27 1999-10-12 Denso Corp 蒸発燃料排出防止装置
DE19925677A1 (de) * 1999-06-04 2000-12-07 Delphi Tech Inc Belüftungssystem für einen Kraftstoffbehälter

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Publication number Priority date Publication date Assignee Title
US6343505B1 (en) * 1998-03-27 2002-02-05 Siemens Canada Limited Automotive evaporative leak detection system
JP2001099015A (ja) * 1999-09-30 2001-04-10 Denso Corp 蒸発燃料処理装置

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS60152057U (ja) * 1984-03-21 1985-10-09 いすゞ自動車株式会社 キヤニスタ
US5429099A (en) * 1994-09-08 1995-07-04 Lectron Products, Inc. Anti-permeation filter for vapor management valve
US5727532A (en) * 1995-05-19 1998-03-17 Siemens Electric Limited Canister purge system having improved purge valve control
JPH11182361A (ja) * 1997-12-19 1999-07-06 Toyota Motor Corp キャニスタの異音発生防止構造
JPH11280569A (ja) * 1998-03-27 1999-10-12 Denso Corp 蒸発燃料排出防止装置
DE19925677A1 (de) * 1999-06-04 2000-12-07 Delphi Tech Inc Belüftungssystem für einen Kraftstoffbehälter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10247935A1 (de) * 2002-10-15 2004-04-29 Daimlerchrysler Ag Kraftstoffbehälter und Ventileinheit
WO2010023806A1 (fr) * 2008-09-01 2010-03-04 三菱電機株式会社 Électrovanne de ventilation de récipient and couvercle protecteur pour celle-ci
JP5020380B2 (ja) * 2008-09-01 2012-09-05 三菱電機株式会社 キャニスタ・ベント・ソレノイドバルブの保護カバー
US9016309B2 (en) 2008-09-01 2015-04-28 Mitsubishi Electric Corporation Protective cover for canister vent solenoid valve
US9103302B2 (en) 2010-08-25 2015-08-11 Mitsubishi Electric Corporation Dual electromagnetic valve and evaporated gas treatment system
US10605206B2 (en) 2014-12-25 2020-03-31 Aisan Kogyo Kabushiki Kaisha Fuel vapor processing apparatus

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