EXHAUST AIR PURIFICATION DEVICE FOR DIESEL ENGINE

• Main Authors: HAYASHI KOTARO, YOSHIDA HIDEJI, OBATA KIYOSHI, TANIGUCHI HIROYUKI, YASUURA NOBUSHI, KATO KEIICHI
• Format: Patent
• Language: English
• Published: 13.01.1995
• Edition: 6
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PURPOSE:To provide an exhaust air purification device for diesel engine superior in control accuracy of electric equipment for an electric heater or an electric air pump. CONSTITUTION:A filter 5 is provided in the exhaust system of a diesel engine 1 and an electric heater 6 is arranged on the end of the filter 5. A semi- conductive switching element 12 is arranged on the way to the power supply circuit of the electric heater 6 and the electric heater 6 is energized by outputting duty signal to the element 12 so that perticulates caught in the filter 5 are burned and the filter is regenerated. And voltage detection lines are provided on both sides of the electric heater 6 in the power supply line of the electric heater 6 and samplers 20, 21 are provided on the way to the lines. The samplers 20, 21 are closed at electric heater energizing timing by duty signals, voltage applied on the electric heater 6 at that time is detected, and the duty signals are so controlled as to become supply electric power to the target electric heater 6.