Combustion engine
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United States of America Patent
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Jun 5, 2018
Issued Date -
Aug 11, 2016
app pub date -
Oct 8, 2014
filing date -
Oct 16, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A combustion engine includes a cylinder head including a controllable engine valve configured to open/close a combustion chamber in the combustion engine, a valve actuator operatively connected with and configured to displace the engine valve, and a closed pressure fluid circuit, wherein the valve actuator is arranged in the closed pressure fluid circuit. The combustion engine includes a cylinder head chamber that is included in the closed pressure fluid circuit and that is delimited by the cylinder head and a cylinder head mantle, by the valve actuator including a pneumatic pressure fluid circuit with an outlet opening that is in fluid communication with the cylinder head chamber, and by the cylinder head chamber including a hydraulic liquid drainage valve, wherein a drainage conduit stretches from the hydraulic liquid drainage valve to a hydraulic liquid vessel of the combustion engine for draining hydraulic liquid accumulated in the cylinder head chamber.
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