Diesel particulate filter apparatus

• Main Author: KAWAMURA, HIDEO
• Format: Patent
• Language: English; French; German
• Published: 06.03.1996
• Edition: 6
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

This diesel particulate filter apparatus comprises a main filter(1), a sub-filter(2) provided in a central portion of the main filter(1), and a bypass cylinder(4) interposed between the main filter(1) and sub-filter(2). A filter body(3, 34) constituting the main filter(1) is made of long ceramic fiber, and the surface of the filter body(3, 34) constituting the main filter(1) is made of long ceramic fiber, and the surface of the filter body(3, 34) is covered with a metal net(6, 7), which is then fixed thereto. A heat resisting metal coil (5) is provided on the surface of the filter body(3, 34) which is at the exhaust gas introducing side, and a ceramic fiber twisting(8) is wound around and fixed to the filter body(3, 34). A bypass valve(9) adapted to be opened and closed by an actuator(11) is provided on an exhaust gas introducing side of the sub-filter(2), and an admission port of the sub-filter(2) is opened and closed by the bypass valve(9). Each wire rod(5M) constituting the metal net comprises a core member(31) formed out of a material containing Ni and Cr and having a low resistance temperature coefficient and a large specific electric resistance value, and an intermediate mamber(32) coating the cove member and formed out of a formed out of a material having a high resistance temperature coefficient and a small specific electric resistance value. The wire rod(5M) is covered with a corrosion resisting layer of coating(33) of Al2O3 or ZrO2.