JP7515538B2 - 蒸発性燃料蒸気の排出制御システム - Google Patents
蒸発性燃料蒸気の排出制御システム Download PDFInfo
- Publication number
- JP7515538B2 JP7515538B2 JP2022094388A JP2022094388A JP7515538B2 JP 7515538 B2 JP7515538 B2 JP 7515538B2 JP 2022094388 A JP2022094388 A JP 2022094388A JP 2022094388 A JP2022094388 A JP 2022094388A JP 7515538 B2 JP7515538 B2 JP 7515538B2
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- JP
- Japan
- Prior art keywords
- volume
- adsorbent
- canister
- butane
- emission control
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 239000000446 fuel Substances 0.000 title claims description 63
- 239000003463 adsorbent Substances 0.000 claims description 220
- 238000001179 sorption measurement Methods 0.000 claims description 116
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 93
- 238000010926 purge Methods 0.000 claims description 76
- 239000001273 butane Substances 0.000 claims description 49
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 48
- 238000010998 test method Methods 0.000 claims description 16
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 11
- 238000011068 loading method Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 64
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- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 3
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
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- 239000011159 matrix material Substances 0.000 description 1
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
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- 230000037303 wrinkles Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
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- F01N3/0835—Hydrocarbons
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Description
吸着体の呼び容積=h×A
呼び容積の見掛け密度=部分質量/(h×A)
「部分質量」は、吸着特性を求めて代表的な吸着体試料を試験した吸着体の質量であり、不活性または吸着性の結合剤および充填剤の代表的な割合を含む。
吸着体の呼び容積=h×A
呼び容積の見掛け密度=部分質量/(h×A)
「部分質量」は、吸着特性を求めて代表的な吸着体試料を試験した吸着体の質量であり、不活性または吸着性の結合剤および充填剤の代表的な割合を含み、
hは、フィルタに入る蒸気またはガス流れに対して垂直な吸着体の前面と、蒸気またはガスがフィルタを出る吸着体の背面の間の距離と定義される吸着体の長さであり、
Aは吸着体の断面積である。
呼び増分吸着容量=[50vol%における吸着されたブタン-5vol%における吸着されたブタン]×呼び容積の見掛け密度×1000
という式による吸着容量を表し、
「50vol%における吸着されたブタン」は、50vol%のブタン濃度における、吸着体試料のグラム質量当りの吸着されたn-ブタンのグラム質量であり、
「5vol%における吸着されたブタン」は、5vol%のブタン濃度における、吸着体試料のグラム質量当りの吸着されたn-ブタンのグラム質量であり、
「呼び容積の見掛け密度」は、以前に定義された通りである。
パージされたブタンの量=添加後の試験アセンブリの質量-パージ後の試験アセンブリの質量、である。
Veff=ΣVnom, i+ΣVgap, j
Beff=Σ(Bnom, i×Vnom, i)/Veff
増分吸着容量の割出し
101 メインキャニスタ
102 支持スクリーン
103 分割壁
104 燃料蒸気入口
105 通気ポート
106 パージ出口
107 コンジット
109 ハニカム吸着体
110 発泡吸着体
111 積層型波形シートの吸着体モノリス
112 波形のしわ
113 波形のシート
114 波形のシート
115 平行な吸着シートの吸着容積
116 吸着スリーブ
120 キャニスタシステム
121 キャニスタシステム
122
201 最初の吸着容積
202 後続の吸着容積
203 後続の吸着容積
204 後続の吸着容積
205 空の容積
300 補助キャニスタ
301 後続の吸着容積
302 後続の吸着容積
303 後続の吸着容積
304 空の容積
305 空の容積
800 装置
801 試料パン
802 ばね
803 試料管
804 低真空ポンプ
805 拡散ポンプ
806 拡散ポンプ
807 金属/Oリングの真空弁
808 金属/Oリングの真空弁
809 金属/Oリングの真空弁
810 ブタンシリンダ
811 圧力読取りユニット
812 コンジット
Claims (1)
- 1つまたは複数のキャニスタを含む蒸発ガス制御キャニスタシステムであって、
25℃において5vol%と50vol%の間のn-ブタンの蒸気濃度で35グラムのn-ブタン/Lより大きい有効な増分吸着容量を有する最初の吸着容積と、
25℃において5vol%と50vol%の間のn-ブタンの蒸気濃度で24グラム未満のn-ブタン/Lの有効な増分吸着容量、および2グラムと6グラムの間のg-合計BWCを有する少なくとも1つの後続の吸着容積とを備え、
前記最初の吸着容積および前記少なくとも1つの後続の吸着容積が単一のキャニスタ内に配置されており、あるいは、前記最初の吸着容積と前記少なくとも1つの後続の吸着容積が、燃料蒸気による逐次の接触を可能にするように接続された個別のキャニスタの中に配置されており、
2012年 LEV-III カリフォルニア州のブリードエミッション試験方法(BETP) section D.12に従って、前記キャニスタシステムが、40g/hrのブタン添加ステップの後、約210リットル以下のパージを与えて、2日間の昼間呼吸損失(DBL)の排出物が20mg以下である蒸発ガス制御キャニスタシステム。
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