Engine valve spring with damping
AssigneeFca US LLC
InventorSven Walter Pruett
Life of this patent
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Abstract
A valve spring for an engine valve of an internal combustion engine includes a body having a first end and an opposite second end and defining a plurality of coils having an outer surface, and a flocking material applied to at least a portion of the outer surface, the flocking material including a plurality of fibers configured to provide a passive vibro-acoustic damping to facilitate dynamic damping of the valve spring and reduce noise, vibration, and harshness.
Claims11
A valve spring for an engine valve of an internal combustion engine, the valve spring comprising:
- a body having a first end and an opposite second end and defining a plurality of coils having an outer surface;
- and
- a flocking material applied to at least a portion of the outer surface, the flocking material including a plurality of fibers configured to provide a passive vibro-acoustic damping to facilitate dynamic damping of the valve spring and reduce noise, vibration, and harshness,
- wherein the flocking material is configured to absorb oil to further facilitate dynamic damping of the valve spring.
A method of manufacturing a valve spring for an engine valve of an internal combustion engine, the method comprising:
- applying an adhesive to an outer surface of the valve spring;
- and
- applying flocking material to at least a portion of the outer surface having the adhesive, the flocking material including a plurality of fibers configured to provide a passive vibro-acoustic damping to facilitate dynamic damping of the valve spring and reduce noise, vibration, and harshness,
- wherein the flocking material is a positively charged and micro-fibrous material.
Dependencies are inferred from the claim text.