EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

• Main Authors: ODA TOMIHISA, ITO TAKEKAZU, TAUCHI YUTAKA, TOSHIOKA TOSHISUKE
• Format: Patent
• Language: English
• Published: 13.11.2008
• 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 CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To detect abnormality of an exhaust emission control device using urea water. SOLUTION: A NOxselective reduction catalyst 15 is arranged in an engine exhaust path, and a urea water supply valve 17 is arranged upstream of the NOxselective reduction catalyst 15 in the engine exhaust path. Abnormality of the NOxselective reduction catalyst 15, a urea water supply system and urea water is determined based on results of detections by a NOxcontrol ratio detecting means for detecting a NOxcontrol ratio by the NOxselective reduction catalyst 15, a urea water supply quantity detecting means for detecting supply quantity of the urea water and a urea water concentration detecting means for detecting concentration of the urea water. COPYRIGHT: (C)2009,JPO&INPIT