Lost motion assembly in a valve bridge for use with a valve train comprising a hydraulic lash adjuster
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United States of America Patent
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Apr 4, 2017
Grant Date -
Mar 24, 2016
app pub date -
Sep 18, 2015
filing date -
Sep 18, 2014
priority date (Note) -
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Abstract
In an internal combustion engine comprising two or more engine valves that receive valve actuation motions from a valve actuation motion source via a valve train, which valve train comprises a hydraulic lash adjuster, an apparatus for valve actuation comprises a valve bridge and a lost motion assembly disposed therein. The lost motion assembly comprises a first piston disposed in a first piston bore formed in the valve bridge. The first piston is configured to operatively connect with a component of the valve train. A biasing element is configured to bias the first piston out of the first piston bore with a first force that is greater than a second force applied to the first piston by the hydraulic lash adjuster. A travel limiter is configured to limit travel of the first piston out of the first piston bore to be no greater than a maximum lost motion distance.
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