HONEYCOMB FILTER

• Main Authors: ISHIDA SACHIKO, YOSHIOKA FUMIHIKO
• Format: Patent
• Language: English; Japanese
• Published: 12.10.2022
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

To provide a honeycomb filter having excellent trapping performance for trapping particulate matter contained in exhaust gas and excellent purification performance for purifying harmful components contained in the exhaust gas.SOLUTION: The honeycomb filter includes: a honeycomb structure 4 having a porous partition wall 1; and a plugging portion 5 disposed to seal any one end of a cell 2. The honeycomb structure 4 has, in the extending direction of the cell 2 of the honeycomb structure 4: an inflow side region 15 including a range of up to at least 30% of the total length L1 of the honeycomb structure 4 starting from an inflow end face 11 of the honeycomb structure 4; and an outflow side region 16 including a range of up to at least 20% of the total length L1 of the honeycomb structure 4 starting from an outflow end face 12 of the honeycomb structure 4. An average pore diameter of the partition wall 1 in the inflow side region 15 is 15 to 20 μm, and an average pore diameter of the partition wall 1 in the outflow side region 16 is 9 to 14 μm.SELECTED DRAWING: Figure 4 【課題】排ガス中に含まれる粒子状物質を捕集する捕集性能に優れるとともに、排ガス中に含まれる有害成分を浄化する浄化性能に優れたハニカムフィルタを提供する。【解決手段】多孔質の隔壁１を有するハニカム構造体４と、セル２のいずれか一方の端部を封止するように配置された目封止部５と、を備え、ハニカム構造体４は、ハニカム構造体４のセル２の延びる方向において、ハニカム構造体４の流入端面１１を起点としてハニカム構造体４の全長Ｌ１に対して少なくとも３０％までの範囲を含む流入側領域１５と、ハニカム構造体４の流出端面１２を起点としてハニカム構造体４の全長Ｌ１に対して少なくとも２０％までの範囲を含む流出側領域１６と、を有し、流入側領域１５における隔壁１の平均細孔径が１５～２０μｍであり、且つ、流出側領域１６における隔壁１の平均細孔径が９～１４μｍである。【選択図】図４