Control unit for a valve, especially a gas exchange valve of an internal combustion engine
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United States of America Patent
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Dec 25, 2007
Grant Date -
Feb 22, 2007
app pub date -
Jul 12, 2005
filing date -
Jul 17, 2004
priority date (Note) -
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Abstract
A gas exchange valve of an internal combustion engine, has valve lifting movements with valve displacement curves and a control unit. To this end, a control unit is provided for operation of at least one valve, in particular a gas exchange valve of an internal combustion engine, in which the valvelifting movement of the at least one valve (6) is generated by superimposing two synchronously rotating cam profiles acting mechanically on a lift operating element (4). The two cam profiles (1, 2) have specially shaped areas by means of which, when superimposed to form one of the two cam profiles (1, 2), at least one additional valve displacement (ZV) can be generated on the whole in addition to a main valve displacement movement (HV) over a full revolution of each of these cam profiles (1, 2).
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