Valve drive for an internal combustion engine, in particular with a decompression brake
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United States of America Patent
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Oct 25, 2011
Grant Date -
Feb 11, 2010
app pub date -
Aug 7, 2009
filing date -
Aug 8, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A valve drive with a decompression brake for an internal combustion engine, which has a camshaft with a cam, a rocker arm for transmitting the cam stroke to a gas exchange valve, a pivot bearing supporting the rocker arm, and a hydraulic valve play compensating element arranged in force flow between the cam and gas exchange valve. The valve play compensating element is fixed in the engine and valve drive also has a secondary lever with a first and second lever section. The secondary lever is angularly connected, between the lever sections, to a lever support formed on the rocker arm, is supported with the first lever section on the valve play compensating element and actuates the gas exchange valve by the second lever section. The effective lever arm of the first lever section is considerably greater than the effective lever arm of the second lever section.
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