EXHAUST GAS RECIRCULATION DEVICE

PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation device capable of minimizing a gas leakage even when foreign matter is bitten between a seat and a valve in a valve closing state. SOLUTION: An EGR valve 20 has an inlet port 12 for introducing EGR gas, a discharge port 13 for discharging...

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Bibliographische Detailangaben
Hauptverfasser:	ISHIKAWA KATSUHARU, OGAWA MITSUO, KATO YUKIYA
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation device capable of minimizing a gas leakage even when foreign matter is bitten between a seat and a valve in a valve closing state. SOLUTION: An EGR valve 20 has an inlet port 12 for introducing EGR gas, a discharge port 13 for discharging the EGR gas to an air intake system to mix it with intake air, a housing 11 formed with a communication path 14 for communication of the inlet port 12 and the discharge port 13, the seat 15 provided in the communication path 14, the valve 20 abutting against and separating from the seat 15, and a motor 30 for moving the valve 20. The valve 20 is formed with a conical portion 20a, a plane portion 20b of a diameter larger than the conical portion 20a at its tip and a projected closed portion 15a having a top abutting against the plane portion 20b of the valve 20 in line contact therewith. COPYRIGHT: (C)2007,JPO&INPIT