US Patent 8006659 Internal combustion engine with variable valve mechanism
Patent 8006659 was granted and assigned to Toyota on August, 2011 by the United States Patent and Trademark Office.
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Patent abstract
An internal combustion engine including a variable valve mechanism that can avoid an unnecessary friction increase while preventing a hydraulic lash adjuster from pumping up. When a first engine speed is a critical rotation speed at which the inertia force of the variable valve mechanism exceeds the maximum load on a lost motion spring and a second engine speed is a critical rotation speed at which the inertia force of a valve and rocker arm exceeds the maximum load on a valve spring, the maximum loads are set such that the first engine speed is lower than the second engine speed.
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Patent Inventor Names
Shuichi Ezaki0
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US Patent 08006659 Internal combustion engine with variable valve mechanism US Patent 8006659 Internal combustion engine with variable valve mechanism
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Patent Number
08006659
Patent Number
8006659
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US Patent 08006659 Internal combustion engine with variable valve mechanism
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Is a
Current assignee
Patent jurisdiction
Patent number
08006659
Date of patent
August 30, 2011
Patent application number
12377390
Date Filed
December 4, 2007
Patent primary examiner
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