FAILURE DETECTION DEVICE FOR EXHAUST GAS PURIFICATION FILTER

PROBLEM TO BE SOLVED: To provide a DPF failure detection device which performs a quick failure detection with less erroneous detection, while consuming small power. SOLUTION: A DPF failure detection device, after starting applying a dust collecting voltage to a dust collecting electrode, applies a m...

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Bibliographische Detailangaben
Hauptverfasser:	KURAHASHI KEN, SAIKI KOICHI, OKAYAMA TATSUYA, MIKI MASANOBU, OZAWA HIDETAKA, IWAMA KEIZO, HATTORI MAKOTO, TSUTSUMI KOJIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES 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 HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MACHINES OR ENGINES IN GENERAL MEASURING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS SEPARATION STEAM ENGINES TESTING TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a DPF failure detection device which performs a quick failure detection with less erroneous detection, while consuming small power. SOLUTION: A DPF failure detection device, after starting applying a dust collecting voltage to a dust collecting electrode, applies a measuring voltage to a measuring electrode while the dust collecting voltage is applied, thereby measuring a capacitance of a sensor device. The DPF failure detection device also stops applying the dust collecting voltage to the dust collecting electrode in response to the fact that the measured value CCOLof the capacitance exceeds a completion criterion CCOL_TH. The capacitance of the sensor device can be measured by applying the measuring voltage to the measuring electrode, furthermore, thereby determining whether or not a DPF failure exists on the basis of the measured value CPM. COPYRIGHT: (C)2011,JPO&INPIT