EXHAUST GAS RECIRCULATION DEVICE

• Main Authors: ISOBE YUSUKE, MAEHARA KAZUTO, KIMURA HIROYUKI
• Format: Patent
• Language: English
• Published: 02.06.2011
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; 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; 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 suppressing a non-uniform flow speed distribution in the flow passage cross-sectional surface of an intake passage even just on the downstream side of a connection portion between the intake passage and a circulation passage while efficiently introducing EGR gas into the intake passage. SOLUTION: This low-pressure EGR device 50 includes: the intake passage 23; an annular flow passage 62 which extends along the peripheral direction A of the intake passage 23, is annularly formed, and interiorly surrounds the intake passage 23; an inflow opening 63 allowing the intake passage 23 and annular flow passage 62 to communicate with each other; and an exhaust gas introduction passage 80 introducing exhaust gas G into the annular flow passage 62. The inflow opening 63 is so configured that the opening area thereof is increased from an upstream side to a downstream side along one direction A1 of the peripheral directions with respect to the flow of the exhaust gas G led to flow from the exhaust gas introduction flow passage 80 into the annular flow passage 62. COPYRIGHT: (C)2011,JPO&INPIT