Apparatus for driving piezoelectric element for closing and open

Details Apparatus for driving piezoelectric element for closing and open Apparatus for driving piezoelectric element for closing and open

1990-01-05

1991-10-01

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, 310318, 310319, 123494, 123498, H01L 4108, F02M 5106

Patent

active

050536680

ABSTRACT:
In an apparatus for driving a piezoelectric element to close and open a valve member by expanding and contracting a volume of a pressure chamber, at an initial stage of a closing state of the valve member, a higher voltage than a conventional charging voltage or a lower voltage than a conventional discharging voltage is applied to the piezoelectric element, to thus create an initial large closing force at the valve member.

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