Exhaust gas recirculation valve

In an EGR valve, a valve element is seatable on a valve seat by stroke movement of a valve stem caused by an actuator. The valve seat has a cylindrical part with which a step of the stem is engageable. By the stroke movement of the valve stem, the opening degree between the valve seat and the valve...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FUJIMORI MAKOTO, HATANO MAKOTO, KATO YUKIYA
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COCKS COMBUSTION ENGINES DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS 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 TAPS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	In an EGR valve, a valve element is seatable on a valve seat by stroke movement of a valve stem caused by an actuator. The valve seat has a cylindrical part with which a step of the stem is engageable. By the stroke movement of the valve stem, the opening degree between the valve seat and the valve element is changed. The valve seat is moved in the passage in the stroke movement direction to be engageable with a shoulder of the passage. As the valve element is moved together with the stem, the opening degree in the low opening range is changed. As the step of the stem is engaged with the cylindrical part and the valve seat is moved with respect to the shoulder, the opening degree in the high opening range is changed.