TRAP REGENERATING DEVICE IN EXHAUST GAS PURIFYING DEVICE FOR DIESEL ENGINE

• Main Authors: TAKAMA KENICHIROU, OBATA KIYOSHI, OOISHI KIYOHIKO
• Format: Patent
• Language: English
• Published: 29.08.1984
• 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; 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 a trap regenerating device capable of performing sufficient combustion of fine exhaust gas particles by a method wherein a throttling of intake gas is performed in a high speed range of engine and either a secondary fuel injection or both of a secondary fuel injection and a throttling of intake is performed. CONSTITUTION:When a computer 9 judges that the engine is at a high speed range in reference to signals from a load sensor 17 and a rotation sensor 18, the instruction is transmitted to the load change-over valves 6 and 7 to close an intake throttle valve 3 until it shows a desired pressure of an intake pressure sensor 20. When the computer 9 judges that the engine is at a low or medium speed range, fuel is secondary injected into cylinders of intial exhaust stroke through the change-over valves under instruction for the computer to increase temperature in a trap 10 and to combust the exhaust fine particles. When a sensor 11 for exhaust gas temperature detects that a rate of increased temperature is insufficient in the trap 10, the computer 9 produces an instruction to close the intake throttle valve 3.