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Old 08-04-2019, 06:56 PM   #14 (permalink)
It's all about Diesel
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Originally Posted by Ecky View Post
I understand a roller rocker valve system has relatively low parasitic losses, actuating the valves returns most of the energy back to the camshaft as the lob passes and the spring pushes back up. This system would use energy to actuate the valves in both directions.
But it does get valve springs for return. The hydraulic is there more for dampening, and the variable amount of oil does limit the valve lift.
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