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US 9,523,294 B2Granted
Valve driving device using piezoelectric actuator
AssigneeHyundai Motor Company
InventorJin Hee Cho
Life of this patent
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Abstract
A valve driving device using a piezoelectric actuator includes a piezoelectric body of which a volume expands according to a voltage applied thereto. A displacement increase housing amplifies the volume expansion of the piezoelectric body. A swing arm is connected to the displacement increase housing and operated to drive an engine valve according to the amplified expansion of the piezoelectric body.
Claims11
A valve driving device using a piezoelectric actuator, comprising:
- a piezoelectric body of which a volume expands according to a voltage applied thereto;
- a displacement increase housing for amplifying the volume expansion of the piezoelectric body, the displacement increase housing perpendicularly expanding or contracting with respect to an expansion direction of the piezoelectric body;
- and
- a swing arm connected to the displacement increase housing and operated to drive an engine valve according to the amplified expansion of the piezoelectric body,
- wherein the swing arm opens the engine valve when the displacement increase housing perpendicularly contracts, and the swing arm closes the engine valve when the displacement increase housing perpendicularly expands.
2 more elements
Dependencies are inferred from the claim text.