DIESEL PARTICULATE FILTER USING MICRO-WAVE REGENERATION

• Main Authors: COLBURN, JOSEPH, S, GREGOIRE, DANIEL, J
• Format: Patent
• Language: English; French
• Published: 22.03.2007
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; 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; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; 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; TRANSPORTING; WEAPONS

A diesel particulate filter (10) including a microwave-absorbing target (16) within a waveguide cavity (12). The cavity (12) accepts microwave-frequency electromagnetic radiation through input couplers (20) 90 degrees out of phase with each other to excite circular polarization heating modes. Through excitation of circularly polarized modes, heating patterns are time-averaged azimuthally to smooth out the hot and cold spots, thereby providing greater uniformity relative to heating patterns for corresponding linearly polarized modes. L'invention concerne un filtre à particules diesel comprenant une cible absorbant les micro-ondes disposée à l'intérieur d'une cavité de guide d'onde. La cavité accepte le rayonnement électromagnétique micro-onde traversant des coupleurs d'entrée décalés de 90 degrés l'un par rapport à l'autre de manière à exciter des modes de chauffage par polarisation circulaire. Par excitation de modes polarisés circulairement, des modèles de chauffage sont moyennés dans le temps azimutalement afin de lisser les points chauds et froids, assurant ainsi une uniformité supérieure relativement à des modèles de chauffage pour des modes polarisés linéairement correspondants.