EXHAUST GAS RECIRCULATION DEVICE OF INTERNAL COMBUSTION ENGINE

• Main Authors: SUNAMI KAZUO, MITSUGASHIMA KAZUYA
• Format: Patent
• Language: English
• Published: 10.07.2014
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; 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; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation device of an internal combustion engine capable of further effectively reducing deposit in a recirculation channel.SOLUTION: An exhaust gas recirculation device of an internal combustion engine is provided with a fresh air introduction passage connected to an intake passage at an upstream side with respect to an intake metering valve and an exhaust gas recirculation passage, and a first valve for opening and closing the fresh air introduction passage. Further a second valve is disposed to switch a flow channel mode at a connecting portion of the fresh air introduction passage and the recirculation passage, to an EGR mode in which an EGR gas flows to the recirculation passage, or a fresh air mode in which the fresh air flows to the recirculation passage from the fresh air introduction passage. A control device opens the first valve by setting the first valve and the second valve to the second mode, and executes deposit removing processing by performing valve operation processing to set the second valve to the fresh air mode (step S120).