EXHAUST EMISSION CONTROL DEVICE

PROBLEM TO BE SOLVED: To positively calibrate a zero point of a differential pressure sensor in an engine stop state. SOLUTION: The exhaust emission control device is equipped with a filter 1 arranged in a discharge passage 22 of an engine 20 to collect particulates in exhaust, a differential pressu...

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Bibliographische Detailangaben
Hauptverfasser:	KUROZUMI NOBUO, MIZOGUCHI KENTARO, MATSUDA MITSUHIRO, SAEGUSA TAKA
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 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 positively calibrate a zero point of a differential pressure sensor in an engine stop state. SOLUTION: The exhaust emission control device is equipped with a filter 1 arranged in a discharge passage 22 of an engine 20 to collect particulates in exhaust, a differential pressure sensor 3 for detecting differential pressure between an exhaust pressure on the upstream side of the filter and an exhaust pressure on the downstream side of the filter, and a zero point calibration means 30 for calibrating the zero point of the differential pressure sensor 3 in an engine stop state. In the zero point calibration means 30, the zero point calibration is executed when the engine temperature exceeds a predetermined temperature. COPYRIGHT: (C)2006,JPO&NCIPI