Valve train device and cylinder head provided with same
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United States of America Patent
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Jan 20, 2015
Issued Date -
N/A
app pub date -
Feb 20, 2012
filing date -
Feb 22, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A valve train device installed in a cylinder head of an engine and driven by a camshaft including a valve unit having an intake valve and an exhaust valve communicated with a combustion chamber of an engine, each of the intake valve and exhaust valve having a linearly extending stem portion and driven in an extending direction of the stem portion; a valve lifter disposed between one end side of the stem portion located apart from the combustion chamber and the camshaft to transmit power from the camshaft to the valve unit; a lost motion unit that interrupts power transmission from the valve lifter to the valve unit; a first spring urging the valve unit in a direction to close the intake valve or exhaust valve; and a second spring having a diameter lager than that of the first spring and urging the lost motion unit against the valve lifter.
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