Hydraulic cushioning of a variable valve timing mechanism
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United States of America Patent
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Mar 15, 2005
Grant Date -
Oct 23, 2003
app pub date -
Feb 28, 2003
filing date -
Apr 19, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A variable camshaft timing mechanisms having a vane/housing format is provided. Working hydraulic chambers are created by imposing either single or multiple vanes of a rotor attached to the camshaft into a cavity in a housing that is attached to the camshaft sprocket. Fluid is allowed to normally exhaust from the hydraulic chamber during normal phasing until the rotor nears the end of its travel.
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