Actuator for camless valve drive in an internal combustion engine

An actuator for a camshaft-less valve drive in an internal combustion engine has an anchor shaft (20) with a main section and an end section, each of different materials. The material of the end section has a greater hardness than that of the main section. The sections are firmly connected to each o...

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Bibliographic Details
Main Authors GEBAUER, KLAUS, STRZODA, WALTER
Format Patent
LanguageEnglish
French
German
Published 03.09.2003
Edition7
Subjects
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Summary:An actuator for a camshaft-less valve drive in an internal combustion engine has an anchor shaft (20) with a main section and an end section, each of different materials. The material of the end section has a greater hardness than that of the main section. The sections are firmly connected to each other. The end section material can be steel, highly alloyed steel, ceramic and have a Vickers hardness of at least 750 N/mm2. The valve arrangement involves a gas exchange valve (12) with a valve shaft (22) in a cylinder head (10). The valve is operated by an electro-magnetic actuator (14). The actuator has two electro-magnets (16,18), through which an anchor shaft (20) extends, which at its lower end acts on the valve shaft. Aktuator für einen nockenwellenlosen Ventiltrieb einer Brennkraftmaschine, mit einem Ankerschaft (20), wobei der Ankerschaft einen Hauptabschnitt (26) und einen Endabschnitt (28) aufweist, dadurch gekennzeichnet, daß der Hauptabschnitt aus einem ersten Werkstoff und der Endabschnitt aus einem zweiten Werkstoff besteht, wobei der zweite Werkstoff eine größere Härte als der erste Werkstoff aufweist und der Hauptabschnitt und der Endabschnitt fest miteinander verbunden sind.
Bibliography:Application Number: EP20030003192