BALL TYPE PRESSURE RELIEVING ACTUATOR FOR USE WITH TURBOCHARGERS

A wastegate valve (34) for a turbocharger includes a ball-type valve member (35), which is movable relative to a valve seat (37), and a spring-biased piston (57). A valve spring (52) biases the valve member (35) toward the closed position in engagement with the valve seat (37). The piston (57) also...

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Bibliographische Detailangaben
Hauptverfasser:	ALEXANDER, JAMES, CHAGGAR, SANJIT, WILLIAMS, JAMES, ELMSLIE, JOHN, FINLEY, JAMES
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS 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 TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A wastegate valve (34) for a turbocharger includes a ball-type valve member (35), which is movable relative to a valve seat (37), and a spring-biased piston (57). A valve spring (52) biases the valve member (35) toward the closed position in engagement with the valve seat (37). The piston (57) also biases the valve member (35) to the closed position. While the piston (57) normally closes the valve member (35), a pressure source is operable to selectively drive the piston (57) away from the valve member (35) so that the valve member (35) is acted upon solely by the valve spring (52). The valve spring (52) is set such that exhaust gas pressure can open the waste gate valve (34) and allow self-compensating adjustment in response to exhaust gas pressure.