Dynamic locking and releasing cam lobe
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United States of America Patent
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Jun 8, 2021
Grant Date -
Nov 5, 2020
app pub date -
Jul 16, 2020
filing date -
Jan 20, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a method and system for intermittently operating poppet valves in an internal combustion engine when desired by the selective locking or unlocking of one or more cam lobes with the camshaft. One or more cam lobes, with a small radial clearance, ride on a camshaft such that an engagement mechanism may be activated as desired to lock the cam lobe to the camshaft, thereby activating the respective poppet valve. The cam lobe is prevented from moving axially to ensure correct alignment with a follower. A suitable holding device may be used to ensure the non-activated cam lobes are restrained at a suitable orientation relative to the cam follower.
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