Particulate matter concentration measuring apparatus

• Main Authors: KASUGA, TAKAFUMI, MIYATA, FUMISHIGE, KONSTANDOPOULOS, ATHANASIOS G, ISHII, YASUHIRO
• Format: Patent
• Language: English; French; German
• Published: 06.10.2010
• 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; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PHYSICS; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; WEAPONS

A particulate matter concentration measuring apparatus for measuring the concentration of particulate matter in exhaust gas flowing through the exhaust line of a diesel engine includes an exhaust gas extraction line diverging from the exhaust line and having a flow passage cross-sectional area smaller than the flow passage cross-sectional area of the exhaust line; a particulate matter detection filter provided in the exhaust gas extraction line; and a differential pressure sensing part configured to sense a differential pressure generated between the inlet and the outlet of the particulate matter detection filter, wherein the flow velocity of the exhaust gas passing through the cell wall of the particulate matter detection filter is more than or equal to 0.02 m/s and less than or equal to 2.0 m/s.