METHOD AND SYSTEM FOR SINGLE EXHAUST VALVE BRIDGE BRAKE
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United States of America Patent
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Issued Date -
Dec 23, 2010
app pub date -
Jun 2, 2010
filing date -
Jun 2, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Systems and methods for providing compression-release and partial bleeder braking engine valve actuation are disclosed. In an embodiment of the present invention, a cam may be provided with a main exhaust lobe and a compression-release or partial bleeder lobe and a base circle portion between the two lobes. A rocker arm including an internal rocker passage may be operatively connected to the cam. The rocker arm may contact a valve bridge at a central portion. The valve bridge may be operatively connected to first and second engine valves at its first and second ends, respectively. A slave piston incorporated into the first end of the valve bridge and a master piston may be incorporated into the central portion of the valve bridge. A hydraulic circuit may be provided between the master and slave pistons. The master and slave pistons may be selectively actuated and the bleed hole may be selectively blocked and unblocked to provide compression-release or partial bleeder braking as a result of the valve actuation motion imparted from the cam to the valve bridge through the rocker arm.
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