WO2015093105A1 - 蒸発燃料処理装置 - Google Patents
蒸発燃料処理装置 Download PDFInfo
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- WO2015093105A1 WO2015093105A1 PCT/JP2014/073303 JP2014073303W WO2015093105A1 WO 2015093105 A1 WO2015093105 A1 WO 2015093105A1 JP 2014073303 W JP2014073303 W JP 2014073303W WO 2015093105 A1 WO2015093105 A1 WO 2015093105A1
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- 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
- F02M25/0854—Details of the absorption canister
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0415—Beds in cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
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- 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
- F02M25/0872—Details of the fuel vapour pipes or conduits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/41—Further details for adsorption processes and devices using plural beds of the same adsorbent in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4516—Gas separation or purification devices adapted for specific applications for fuel vapour recovery systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
- B60K2015/03514—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems with vapor recovery means
Definitions
- the present invention relates to a fuel vapor processing apparatus.
- an evaporative fuel processing device (hereinafter also referred to as a canister) that temporarily adsorbs fuel components in evaporative fuel has been used to prevent evaporative fuel from an automobile fuel tank or the like from being released into the atmosphere. ing.
- a case 105 having a tank port 102, a purge port 103, and an atmospheric port 104 as shown in FIG. 6 is provided, and a main port communicating with the tank port 102 and the purge port 103 is provided in the case 105.
- the chamber 106 and a sub chamber 107 communicating with the atmospheric port 104 are formed.
- the main chamber 106 and the sub chamber 107 communicate with each other on the side opposite to the atmospheric port 104, and the main chamber 106 is filled with activated carbon.
- a canister 101 provided with partition plates 121 and 122 is known between the third adsorption layer 113 and the fourth adsorption layer 114 (see, for example, Patent Document 1).
- the volume of the fourth adsorption layer 114 is made smaller than that of the other adsorption layers 111, 112, 113, so that the blow-through to the atmosphere is reduced.
- the volume of the fourth adsorption layer 114 is only set to 2.0% to 4.8% of the volume of the first adsorption layer 111. Even if the volume of the fourth adsorbing layer 114 is set to this volume, if the volume of the second adsorbing layer 112 and the third adsorbing layer 113 is too large or too small, there is a possibility that blow-through to the atmosphere may occur after purging. is there.
- an object of the present invention is to provide an evaporative fuel processing device that reduces the escape of evaporative fuel components from the atmospheric port to the outside as compared with conventional canisters.
- the present invention forms a passage through which a fluid can flow inside, forms a tank port and a purge port on one end side of the passage, and forms an air port on the other end side.
- the evaporative fuel processing apparatus is provided with four adsorption layers filled with an adsorbent capable of adsorbing fuel components in the passage, In this passage, a main chamber provided with a main adsorption layer, and a sub chamber provided on the air port side of the main chamber, In the sub chamber, a first adsorbing layer, a second adsorbing layer, and a third adsorbing layer are provided in series in this order from the main adsorbing layer side, and a separating portion that separates the adjacent adsorbing layers is provided.
- the volume of the first adsorption layer is 4.0% or more and 8.5% or less and the volume of the second adsorption layer is 1.2% or more and 3.0% or less with respect to the volume of the main adsorption layer.
- the volume of the layer is 0.9% or more and 2.2% or less.
- the volume of the second adsorption layer may be made smaller than the volume of the first adsorption layer, and the volume of the third adsorption layer may be made smaller than the volume of the second adsorption layer.
- the total volume of the adsorption layer in the sub chamber may be made smaller than the total volume of the separated portions.
- the volume of the separation portion in the sub chamber may be increased toward the atmosphere port side.
- the separation distance between adjacent adsorbing layers may be formed so as to be longer as the separation portion is closer to the atmospheric port.
- the adsorption layer located closest to the atmosphere port may be composed of activated carbon having a butane working capacity of 14.5 g / dL or more according to ASTM D5228.
- the adsorption layer provided closest to the tank port may be composed of crushed coal.
- the volume of the first adsorption layer is 4.0% or more and 8.5% or less
- the volume of the second adsorption layer is 1.2% or more with respect to the volume of the main adsorption layer.
- FIG. 1 shows a first embodiment of the present invention.
- the fuel vapor processing apparatus 1 of the present invention has a case 2, and a passage 3 through which fluid can flow is formed inside the case 2, and one end of the passage 3 in the case 2.
- adsorption layers filled with an adsorbent capable of adsorbing the evaporated fuel component that is, the main adsorption layer 11, the first adsorption layer 12, the second adsorption layer 13, and the third adsorption layer 14 are arranged in series.
- activated carbon was used as the adsorbent.
- a main chamber 21 communicating with the tank port 4 and the purge port 5 and a sub chamber 22 communicating with the atmospheric port 6 are formed in the case 2, and the main chamber 21 and the sub chamber 22 are The gas is communicated by a space 23 formed in the case 2 on the side opposite to the atmosphere port 6 side, and when the gas flows in the passage 3, it is folded back in the space 23 and flows in a substantially U-shape.
- the tank port 4 communicates with an upper air chamber of a fuel tank (not shown), and the purge port 5 is connected to an intake passage of the engine via a purge control valve (VSV) (not shown).
- VSV purge control valve
- the opening degree of the purge control valve is controlled by an electronic control unit (ECU), and purge control is performed based on the measured value of the A / F sensor or the like during engine operation.
- ECU electronice control unit
- the atmospheric port 6 communicates with the outside through a passage (not shown).
- the main chamber 21 is filled with activated carbon as an adsorbent at a predetermined density to form the main adsorption layer 11, and the main adsorption layer 11 has the largest volume among the four adsorption layers 11, 12, 13, and 14. Is set.
- activated carbon of the main adsorption layer 11 granulated coal or crushed coal can be used, but in this embodiment, crushed coal was used.
- baffle plate 15 that extends from the inner surface of the case 2 to a part of the main adsorption layer 11 is provided.
- the baffle plate 15 allows fluid flowing between the tank port 4 and the purge port 5 to flow through the main adsorption layer 11.
- the main adsorption layer 11 is covered with a filter 16 made of a nonwoven fabric or the like on the tank port 4 side, and a filter 17 made of a nonwoven fabric or the like on the purge port 5 side. Further, a filter 18 made of urethane or the like covering the entire surface is provided on the side surface of the space 23 of the main adsorption layer 11, and a plate 19 having a large number of communication holes is provided below the filter 18. The plate 19 is biased toward the tank port 4 by a biasing means 20 such as a spring.
- the first adsorbing layer 12 filled with activated carbon as an adsorbing material at a predetermined density is formed on the space 23 side of the sub chamber 22.
- activated carbon granulated coal or crushed coal can be used. In this example, granulated coal was used.
- a filter 26 made of urethane or the like covering the whole is provided on the space 23 side of the first adsorption layer 12.
- a plate 27 having a large number of communication holes provided substantially uniformly over the entire surface is provided on the space 23 side of the filter 26, a plate 27 having a large number of communication holes provided substantially uniformly over the entire surface is provided.
- the plate 27 is biased toward the atmosphere port 6 by a biasing member 28 such as a spring.
- a space 23 is formed between the plates 19 and 27 and the lid plate 30 of the case 2, and the main adsorption layer 11 and the first adsorption layer 12 communicate with each other through the space 23.
- a second adsorption layer 13 filled with activated carbon as an adsorbent at a predetermined density is formed on the atmosphere port 6 side of the first adsorption layer 12 in the sub chamber 22.
- activated carbon granulated coal or crushed coal can be used. In this example, granulated coal was used.
- a first separating portion 31 is provided that separates the adsorbing layers 12 and 13 by a predetermined distance L1. Yes.
- Filters 35 and 36 made of urethane or the like are provided on the first adsorbing layer 12 side end and the second adsorbing layer 13 side end of the first separation portion 31.
- a space forming member 37 that can separate the filters 35 and 36 by a predetermined distance is provided between the filters 35 and 36.
- a third adsorption layer 14 filled with activated carbon as an adsorbent at a predetermined density is formed.
- activated carbon granulated coal or crushed coal can be used.
- high-performance activated carbon having a butane working capacity (BWC) of 14.5 g / dL or more according to ASTM D5228 was used.
- a filter 34 made of a nonwoven fabric or the like covering the entire end surface is provided on the atmosphere port 6 side of the third adsorption layer 14.
- a second separation portion 32 that separates the adsorption layers 13 and 14 by a predetermined distance L2 is provided. Yes.
- Filters 38 and 39 made of urethane or the like are provided on the second adsorbing layer 13 side end and the third adsorbing layer 14 side end of the second separation portion 32.
- a space forming member 40 capable of separating the filters 38 and 39 by a predetermined distance is provided between the filters 38 and 39.
- the separating portions 31 and 32 only need to be able to separate adjacent adsorbing layers by a predetermined distance.
- the separating portions 31 and 32 may be formed only by a filter such as urethane, or may be configured by only the space forming members 37 and 40. good.
- the volume V1 of the first adsorption layer 12 is 4.0% to 8.5% and the volume V2 of the second adsorption layer 13 is 1.2% to 3.0% with respect to the volume V0 of the main adsorption layer 11.
- the volume V3 of the 3rd adsorption layer 14 is set to 0.9% or more and 2.2% or less. If the volume of any of the adsorbing layers 12, 13, 14 is larger than the above range, the remaining amount of the evaporated fuel component in the adsorbing layer increases after purging, and the evaporative fuel component leaks downstream from the adsorbing layer. The amount increases, the amount of blow-through to the atmosphere increases, and the blow-through performance deteriorates.
- any of the adsorption layers 12, 13, and 14 is made smaller than the above range, sufficient adsorption performance for the evaporated fuel component cannot be obtained in the adsorption layer, and there is a large amount of blow-through to the atmosphere. Will get worse.
- the volume V2 of the second adsorption layer 13 is smaller than the volume V1 of the first adsorption layer 12, and the volume V3 of the third adsorption layer 14 is smaller than the volume V2 of the second adsorption layer 13. Is set. That is, the volume of the adsorption layer in the sub chamber 22 is set to be smaller as the adsorption layer on the atmosphere port 6 side.
- volume V5 of the second separation portion 32 is set larger than the volume V4 of the first separation portion 31. That is, the volume of the separation portion in the sub chamber 22 is set so as to increase as the separation portion is closer to the atmosphere port 6 side.
- the total volume (V1 + V2 + V3) of the adsorption layers 12, 13, and 14 in the sub chamber 22 is set to be smaller than the total volume (V4 + V5) of the separation portions 31 and 32 in the sub chamber 22.
- the separation distance L2 between the second adsorption layer 13 and the third adsorption layer 14 is set longer than the separation distance L1 between the first adsorption layer 12 and the second adsorption layer 13. That is, in the sub chamber 2, the separation distance between adjacent adsorbing layers is formed to be longer as the separation portion is closer to the atmospheric port 6.
- the first adsorbing layer 12, the second adsorbing layer 13, and the third adsorbing layer 14 are arbitrarily set such that the cross-sectional areas orthogonal to the axes thereof are all the same. It is preferable to reduce the area.
- the gas containing the evaporated fuel that has flowed into the evaporated fuel processing apparatus 1 from the tank port 4 is adsorbed by the adsorbent in each of the adsorbing layers 11 to 14, and then the atmosphere is output from the atmospheric port 6 to the atmosphere. Is released.
- the purge control valve is opened by the electronic control unit (ECU), and the air sucked into the evaporated fuel processing apparatus 1 from the atmospheric port by the negative pressure in the intake passage is Flows in the reverse direction and is supplied from the purge port 5 to the intake passage of the engine.
- the fuel component adsorbed by the adsorbent in each of the adsorbing layers 11 to 14 is desorbed and supplied to the engine together with air.
- the evaporative fuel treatment device 1 is connected to the gasoline tank, and the blow-by amount is measured by changing the temperature so as to simulate the change in the outside air temperature.
- the blow-by amount is derived by detecting the HC concentration discharged from the atmospheric port 6 and converting it to weight.
- the amount of blow-through was measured by changing the volume of each of the adsorption layers 11 to 14 with 25 mg as a reference value.
- the volume V1 of the first adsorption layer 12 is 6.6%
- the volume V2 of the second adsorption layer 13 is 2.2%
- the volume V3 of the third adsorption layer 14 is In the case of 1.1%, the blow-by amount was 19 mg, which was below the reference value.
- the volume V1 of the first adsorption layer 12 is 7.0%
- the volume V2 of the second adsorption layer 13 is 2.3%
- the volume V3 of the third adsorption layer 14 is When 1.2%, the blow-through amount was 23 mg, which was below the reference value.
- the volume V1 of the first adsorption layer 12 is set to 4.0%
- the volume V2 of the second adsorption layer 13 is set to 1.3%
- the volume V3 of the third adsorption layer 14 is set.
- the blow-through amount was 17 mg, which was below the reference value.
- the volume V1 of the first adsorption layer 12 is 4.0% or more and 8.5% or less
- the volume V2 of the second adsorption layer 13 is 1.2% or more.
- the volume V3 of the third adsorption layer 14 is 0.9% or more and 2.2% or less to 3.0% or less, the value is below the reference value.
- the volume V1 of the first adsorption layer 12 is 10.0%
- the volume V2 of the second adsorption layer 13 is 1.3%
- the volume of the third adsorption layer 14 is.
- V3 was set to 0.4%
- the blow-through amount was 90 mg, which greatly exceeded the reference value.
- the volume V1 of the first adsorption layer 12 is set to 5.0%
- the volume V2 of the second adsorption layer 13 is set to 1.4%
- V3 was set to 0.5%
- the blow-through amount was 110 mg, which greatly exceeded the reference value.
- the volume V1 of the first adsorption layer 12 is 4.0% or more and 8.5% or less
- the volume V2 of the second adsorption layer 13 is 1.2% or more.
- the volume V3 of the third adsorption layer 14 is not less than 3.0% and not more than 0.9% and not more than 2.2%, at least one of the adsorption layers 12, 13, 14 is not satisfied The blow-through amount greatly exceeded the reference value.
- the evaporative fuel processing apparatus 1 of the present invention has the following structure and configuration, and thus provides the following operations and effects.
- the volume V1 of the first adsorption layer 12 is 4.0% to 8.5% and the volume V2 of the second adsorption layer 13 is 1.2% to 3.0% with respect to the volume V0 of the main adsorption layer 11.
- the volume V3 of the third adsorption layer 14 is 0.9% or more and 2.2% or less, the volume of each adsorption layer can be optimized, and the desorption performance is higher than that of the conventional canister 101. It can be improved, and the blow-through to the atmosphere can be further reduced and the blow-through performance can be improved.
- the volume of the adsorption layer in the sub chamber 22 is made smaller as the adsorption layer closer to the atmosphere port 6 side, the remaining amount of the fuel component is further reduced in the adsorption layer closer to the atmosphere port 6 after the purge. It is possible to further reduce the blow-through to the atmosphere and improve the blow-through performance.
- the vaporized fuel component is desorbed in the adsorbing layer. Since the residence time of the gas whose temperature has decreased in the separated portion can be made longer than that of the conventional canister 101, the temperature increase (recovery) amount of the gas that has decreased due to desorption increases. Thereby, the temperature of the gas flowing into the adsorption layer located on the tank port 4 side of the adsorption layer can be made higher than that of the conventional canister 101, and the desorption performance of the evaporated fuel component of the adsorbent can be kept high. Can do. Thereby, the remaining amount of the fuel component in the evaporated fuel processing apparatus 1 after purging can be reduced as compared with the conventional canister 101, the amount of blow-through to the atmosphere can be reduced, and the blow-through performance can be improved.
- the separation portion close to the atmospheric port 6 the desorption performance of the evaporative fuel treatment apparatus 1 can be improved by increasing the residence time of the gas and increasing the amount of increase in the temperature of the gas that has decreased due to desorption of the evaporative fuel component during purging.
- the U-shaped passage 3 that is folded once in the space 23 is formed in the case 2, but for example, as shown in FIG. It is good.
- the structure of the main chamber 21 of the second embodiment is the same as that of the main chamber 21 of the first embodiment.
- the sub chamber 42 of the second embodiment is formed in a U-shape that is folded back in the space 43, one end of the sub chamber 42 communicates with the space 23, and the atmospheric port 6 is provided at the other end.
- the first adsorbing layer 12 and the second adsorbing layer 13 similar to those in the first embodiment are provided between the spaces 23 and 43 in the sub chamber 42, and the first adsorbing layer 12 and the second adsorbing layer 13 are provided between the first adsorbing layer 12 and the second adsorbing layer 13.
- a separation portion 31 is provided.
- a third adsorption layer 14 similar to the third adsorption layer 14 of the first embodiment is provided on the atmosphere port 6 side of the space 43.
- a second separation portion 32 is provided between the third adsorption layer 14 and the second adsorption layer 13.
- Example 2 The mutual relationship between the adsorption layers 11, 12, 13, and 14 and the separation portions 31 and 32 is set in the same manner as in the first embodiment.
- the distance corresponding to the separation distance L ⁇ b> 2 between the second adsorption layer 13 and the third adsorption layer 14 in Example 1 is the distance between the end surface of the second adsorption layer 13 on the atmosphere port 6 side and the third adsorption layer 14. This is the axial distance from the tank port 4 side end surface. That is, as shown in FIG. 2, the distance L2 ′ between the end face on the atmosphere port 6 side of the second adsorption layer 13 and the end face on the tank port 5 side of the space 43, the end face on the atmosphere port 6 side of the space 43, and the third adsorption layer 14. (L2 ′ + L2 ′′) with the distance L2 ′′ from the tank port 4 side end surface.
- the passage in the case 2 may have a shape different from the passages 3 and 41 of the first and second embodiments. For example, as shown in FIG. It is good.
- the structure of the main chamber 21 of the third embodiment is the same as that of the main chamber 21 of the first embodiment.
- the sub chamber 52 of the third embodiment is formed in an N-shape that folds twice in the spaces 53 and 54, one end of the sub chamber 52 communicates with the space 23, and the air port 6 is provided at the other end.
- the first adsorbing layer 12 and the second adsorbing layer 13 are provided between the spaces 23 and 53 in the sub chamber 52, and the first adsorbing layer 12 and the second adsorbing layer 13 are provided between the first adsorbing layer 12 and the second adsorbing layer 13, respectively.
- One separating portion 31 is provided.
- a third adsorption layer 14 similar to the third adsorption layer 14 of the second embodiment is provided between the spaces 53 and 54.
- a second separation portion 32 is provided between the third adsorption layer 14 and the second adsorption layer 13.
- the mutual relationship between the adsorption layers 11, 12, 13, 14 and the separating portions 31, 32 is set in the same manner as in the second embodiment.
- the passage 3 in the case 2 is formed in a U-shape that folds once in the space 23. For example, as shown in FIG. May be.
- Example 4 is an evaporative fuel processing apparatus in which a main chamber 21 and a sub chamber 22 are arranged in a straight line without being folded back in a space, for example, as shown in FIG.
- a sub chamber having a separation portion for separating three adsorbing layers and the adsorbing layers adjacent to each other is provided on the air port 6 side of the main adsorbing layer 11.
- the mutual relationship between the adsorption layers 11, 12, 13, and 14 and the separation portions 31 and 32 is set in the same manner as in the first embodiment.
- FIG. 5 shows a fifth embodiment according to the present invention.
- the evaporative fuel processing device 61 of the fifth embodiment has a main body canister 62 and a sub-canister 63, and the main body canister 62 and the sub-canister 63 are communicated by a communication pipe 64.
- the main chamber 21 and the first sub chamber 65 are formed in the same manner as in the first embodiment.
- the main adsorption layer 11 is formed in the main chamber 21, and the first sub chamber 65 is formed in the first sub chamber 65.
- the same 1st adsorption layer 12 and the 2nd adsorption layer 13 are provided, and the 1st separation part 31 is provided between the 1st adsorption layer 12 and the 2nd adsorption layer 13.
- the second sub chamber 66 is formed in the sub canister 63, and the third adsorption layer 14 similar to that of the first embodiment is provided in the second sub chamber 66.
- a second separation portion 67 is formed between the second adsorption layer 13 and the third adsorption layer 14 across the first sub chamber 65 and the second sub chamber 66.
- the sub chamber of the first embodiment corresponds to the first sub chamber 65 in the main body canister 62 and the second sub chamber 66 in the sub canister 63.
- the mutual relationship between the adsorption layers 11, 12, 13, and 14 and the separation portions 31 and 32 is set in the same manner as in the first embodiment.
- the volume of the second separation portion 67 is the distance of the space excluding the communication pipe 64 or the residence time because the flow velocity increases in that part of the communication pipe 64 having a small flow path cross-sectional area and the residence time becomes short.
- the distance L2 between the second adsorption layer 13 and the third adsorption layer 14 in Example 1 corresponds to L3 + L4 in FIG.
- the shape of the entire evaporative fuel processing apparatus, the shape and arrangement of the adsorbing layer, the separating portion, the space, etc. are the same as in the first embodiment in the mutual relationship between the adsorbing layers 11, 12, 13, 14 and the separating portions 31, 32. As long as it is set, it can be arbitrarily set in addition to the above embodiment.
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Abstract
Description
この通路には、主吸着層を設けた主室と、該主室の大気ポート側に副室を設け、
副室には、主吸着層側から順に第1吸着層、第2吸着層、第3吸着層を直列に設け、この隣り合う吸着層を離間させる離間部を設け、
主吸着層の容積に対して、第1吸着層の容積を4.0%以上8.5%以下とし、第2吸着層の容積を1.2%以上3.0%以下とし、第3吸着層の容積を0.9%以上2.2%以下としたことを特徴とするものである。
[実施例1]
図1は、本発明の実施例1を示す。
なお、離間部31,32は、隣り合う吸着層が所定距離離間することができればよく、例えば、ウレタン等のフィルタのみで形成してもよいし、空間形成部材37、40のみで構成しても良い。
まず、タンクポート4から蒸発燃料処理装置1内に蒸発したガソリン成分を所定量流入させた後に、吸着材における蒸発燃料成分の吸着・脱離が安定するまで長時間放置し、パージを行った後に所定時間放置する。次に、ブタンをタンクポート4から蒸発燃料処理装置1内に流入させて吸着材に吸着させた後に、吸着材の温度が一定になるまで放置し、その後パージを行い半日放置する。次に、ガソリンタンクに蒸発燃料処理装置1を接続し、外気温度変化を模擬するように温度を変化させて吹き抜け量を測定する。吹き抜け量は大気ポート6から排出されるHC濃度を検出し、それを重量に換算して導き出したものである。
実施例1においては、ケース2内に空間23で1回折り返すU字状の通路3を形成したが、例えば図2に示すように、ケース2内に2回折り返すN字状に形成した通路41としてもよい。
本実施例2においても、実施例1と同様の作用・効果を奏する。
更に、ケース2内の通路は実施例1、2の通路3、41とは別の形状としてもよく、例えば図3に示すように、ケース2内において3回折り返すW字状に形成した通路51としてもよい。
本実施例3においても、実施例1,2と同様の作用・効果を奏する。
実施例1においては、ケース2内の通路3を空間23で1回折り返すU字状に形成したが、例えば、図4に示すように、ケース内の通路を折り返しのないI字状に形成してもよい。
本実施例4においても、実施例1と同様の作用・効果を奏する。
図5は本発明に係る実施例5を示す。
本実施例5においても、実施例1と同様の作用・効果を奏する。
蒸発燃料処理装置全体の形状や、吸着層、離間部、空間等の形状、配列等は、吸着層11,12,13,14と離間部31,32の相互の関係が実施例1と同様に設定されていれば、上記実施例以外にも任意に設定することができる。
3,41,51 通路
4 タンクポート
5 パージポート
6 大気ポート
11,12,13,14 吸着層
22,42,52,65,66 副室
31,32,67 離間部
Claims (7)
- 内部に流体が流通できる通路を形成し、該通路の一端側にはタンクポート及びパージポートを形成し、前記通路の他端側には大気ポートを形成し、前記通路内には、燃料成分を吸着できる吸着材を充填した吸着層を4つ設けた蒸発燃料処理装置であって、
前記通路には、主吸着層を設けた主室と、該主室の大気ポート側に副室を設け、
前記副室には、前記主吸着層側から順に第1吸着層、第2吸着層、第3吸着層を直列に設け、この隣り合う吸着層を離間させる離間部を設け、
前記主吸着層の容積に対して、前記第1吸着層の容積を4.0%以上8.5%以下とし、前記第2吸着層の容積を1.2%以上3.0%以下とし、前記第3吸着層の容積を0.9%以上2.2%以下としたことを特徴とする蒸発燃料処理装置。 - 前記第1吸着層の容積より前記第2吸着層の容積を小さくし、前記第2吸着層の容積より前記第3吸着層の容積を小さくしたことを特徴とする請求項1記載の蒸発燃料処理装置。
- 前記副室において、吸着層の容積の合計を、離間部の容積の合計よりも小さくしたことを特徴とする請求項1に記載の蒸発燃料処理装置。
- 前記副室において、離間部の容積を、大気ポート側に近いほど大きくしたことを特徴とする請求項1に記載の蒸発燃料処理装置。
- 前記副室において、隣り合う吸着層の離間距離を、大気ポートに近い離間部ほど長くなるように形成したことを特徴とする請求項1に記載の蒸発燃料処理装置。
- 前記副室において、最も大気ポート側に近い位置する吸着層を、ASTM D5228によるブタンワーキングキャパシティーが14.5g/dL以上の活性炭で構成したことを特徴とする請求項1に記載の蒸発燃料処理装置。
- 前記蒸発燃料処理装置において、最もタンクポートに近い側に設けた吸着層を破砕炭で構成したことを特徴とする請求項1に記載の蒸発燃料処理装置。
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US15/101,663 US20160377032A1 (en) | 2013-12-17 | 2014-09-04 | Vaporized fuel treatment device |
CN201480066262.6A CN105793550A (zh) | 2013-12-17 | 2014-09-04 | 蒸发燃料处理装置 |
KR1020167011457A KR20160063387A (ko) | 2013-12-17 | 2014-09-04 | 증발 연료 처리 장치 |
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CN108026868A (zh) * | 2015-11-10 | 2018-05-11 | 马自达汽车株式会社 | 炭罐及炭罐的车辆安装结构 |
JP6376106B2 (ja) | 2015-11-10 | 2018-08-22 | マツダ株式会社 | キャニスタ |
JP6347422B2 (ja) | 2016-12-09 | 2018-06-27 | マツダ株式会社 | 蒸発燃料処理装置 |
JP6833637B2 (ja) * | 2017-07-14 | 2021-02-24 | 愛三工業株式会社 | 蒸発燃料処理装置 |
JP6725483B2 (ja) * | 2017-12-20 | 2020-07-22 | フタバ産業株式会社 | キャニスタ |
JP2020148174A (ja) * | 2019-03-15 | 2020-09-17 | フタバ産業株式会社 | キャニスタ |
JP7181254B2 (ja) * | 2020-06-12 | 2022-11-30 | フタバ産業株式会社 | 蒸発燃料処理装置 |
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JP2007146793A (ja) * | 2005-11-30 | 2007-06-14 | Mahle Filter Systems Japan Corp | キャニスタ |
JP2013133731A (ja) * | 2011-12-26 | 2013-07-08 | Aisan Industry Co Ltd | 蒸発燃料処理装置 |
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JP2002235610A (ja) | 2001-02-09 | 2002-08-23 | Aisan Ind Co Ltd | 自動車用キャニスタ |
JP4631855B2 (ja) * | 2007-01-26 | 2011-02-16 | トヨタ自動車株式会社 | 蒸発燃料処理装置 |
JP5171884B2 (ja) * | 2010-05-27 | 2013-03-27 | 富士重工業株式会社 | 蒸発燃料処理装置 |
JP5925086B2 (ja) * | 2012-08-28 | 2016-05-25 | 愛三工業株式会社 | 蒸発燃料処理装置 |
JP6049559B2 (ja) * | 2013-07-04 | 2016-12-21 | 愛三工業株式会社 | 蒸発燃料処理装置 |
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JP2005016329A (ja) * | 2003-06-24 | 2005-01-20 | Nissan Motor Co Ltd | 蒸発燃料処理装置及びそれを用いた内燃機関の制御装置 |
JP2007146793A (ja) * | 2005-11-30 | 2007-06-14 | Mahle Filter Systems Japan Corp | キャニスタ |
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US20160377032A1 (en) | 2016-12-29 |
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