Compression release engine brake unit
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United States of America Patent
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Apr 3, 2012
Grant Date -
Dec 9, 2010
app pub date -
Nov 16, 2009
filing date -
Jun 9, 2009
priority date (Note) -
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Abstract
A compression release engine brake unit includes an oil outlet passage formed in a socket brake, which stores engine brake oil, and a reset member opening or closing the outlet passage. The reset member discharges the engine brake oil by opening the oil outlet passage in response to the rotation of a rocker arm during engine braking and, thereby, the engine brake restores the initial state. Since the compression release engine brake can restore the initial state, the return valve lift is the same as when the compression release engine brake is not actuated. Accordingly, the valve does not butt against an engine piston.
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