Engine valve lifter assemblies
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United States of America Patent
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Feb 23, 2021
Grant Date -
Apr 23, 2020
app pub date -
Jul 3, 2018
filing date -
Jul 3, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An engine valve lifter assembly comprises a lifter body, a plunger assembly, and a spring. The lifter body comprises an oil control portion comprising an exterior surface, oil ports, and an interior oil chamber. A plunger interface end comprises an interior plunger chamber and a second spring seat. Selectively reciprocating plunger assembly comprises a piston end coupled to reciprocate in the oil chamber and a cam input end comprising a spring seat. A spring is biased between the spring seat and the second spring seat. The spring is configured to push the cam input end away from the plunger chamber. A sleeve is coupled around the oil control portion of the lifter body, and the sleeve is slidable between a lower position and an upper position to selectively block and unblock the oil ports.
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