DIESEL PARTICULATE FILTER

PROBLEM TO BE SOLVED: To provide a diesel particulate filter (DPF) with a high collecting rate of PM and a large amount of collected PM per unit volume. SOLUTION: This DPF comprises heat resistant fiber filter layers (A1)-(An) (n is an integer of 2 or more) that are laminated. In the DPF, an average...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO MASAHIKO, SUISO FUMIHIRO, ISHIZAKI KEITA, SHIMATANI KAZUNORI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING 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 TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a diesel particulate filter (DPF) with a high collecting rate of PM and a large amount of collected PM per unit volume. SOLUTION: This DPF comprises heat resistant fiber filter layers (A1)-(An) (n is an integer of 2 or more) that are laminated. In the DPF, an average value (a1)-(an) of a fiber diameter of the heat resistant fibers included in each of heat resistant fiber filter layers (A1)-(An) satisfies the following expressions: (1) (a1)≥(a2)≥...≥(an-1)≥(an), and (2) (a1)>(an) (n is an integer of 2 or more). At least one of the heat resistant fiber filter layers (A1)-(An) is a different diameter fiber blend filter including heat resistant fibers (T1)-(Tm) (m is an integer of 2 or more), and a fiber diameter (t1)-(Tm) of each heat resistant fiber (T1)-(Tm) satisfies: (3) (t1)≥(t2)≥...≥(tm-1)≥(tm), and (4) (t1)>(tm) (m is an integer of 2 or more). COPYRIGHT: (C)2009,JPO&INPIT