Method for determining a closing time of a closing element...

Details Method for determining a closing time of a closing element... Method for determining a closing time of a closing element...

2005-03-26

2008-08-19

Solis, Erick (Department: 3747)

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

C123S447000, C123S459000, C123S506000

Reexamination Certificate

active

07413160

ABSTRACT:
In a method for determining the closure time for a valve, operated by a piezoelectric actuator, in order to record the closing time, the voltage at the piezoelectric actuator is recorded and the time is recorded at which the voltage has a maximum difference value from a comparison curve. The difference curve is generated between a start and an end point for a measured curve, having the voltage values applied to the piezoelectric actuator. A precise determination of the closing time can thus be carried out.

REFERENCES:
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patent: 6766241 (2004-07-01), Treichel
patent: 6820596 (2004-11-01), Namari et al.
patent: 2003/0120418 (2003-06-01), Treichel
patent: 199 58 262 (2001-07-01), None
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patent: 03/104633 (2003-12-01), None
International Search Report and Written Opinion for International Application No. PCT/EP2005/003223 (10 pages).

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