Method of operating a piezoelectric actuator

Details Method of operating a piezoelectric actuator Method of operating a piezoelectric actuator

2008-01-31

2009-08-18

Cronin, Stephen K (Department: 3747)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C123S480000, C123S498000, C239S102200

Reexamination Certificate

active

07576473

ABSTRACT:
A method of operating an injector having an injector valve needle and a piezoelectric actuator for controlling movement of the injector valve needle, the method comprising reducing the voltage across the actuator at a first rate (RT1) in order to initiate an initial injection, increasing the voltage across the actuator in order to terminate the injection, and once the initial injection has terminated and before a subsequent injection is initiated, reducing the voltage across the actuator at a second rate (RT2;RT3), which is lower than the first rate (RT1), so as to de-energise the actuator but without initiating an injection. The invention ensures the injector spends a significantly reduced period of its life with a high voltage across its actuator.

REFERENCES:
patent: 6081062 (2000-06-01), Hoffmann et al.
patent: 6155500 (2000-12-01), Takase
patent: 6619268 (2003-09-01), Rueger et al.
patent: 6732715 (2004-05-01), Fallahi et al.
patent: 6772735 (2004-08-01), Boss et al.
patent: 6845759 (2005-01-01), Ohnishi et al.
patent: 6912998 (2005-07-01), Rauznitz et al.
patent: 2004/0057189 (2004-03-01), Cheever et al.
patent: 2007/0018534 (2007-01-01), Sciortino et al.
patent: 2007/0273246 (2007-11-01), Hopley et al.
patent: 2007/0273247 (2007-11-01), Hargreaves et al.
patent: 1400677 (2004-03-01), None
patent: 1628010 (2006-02-01), None
patent: 1746318 (2007-01-01), None
patent: 2366664 (2002-03-01), None

Affiliated with

Also associated with

Rating

Method of operating a piezoelectric actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of operating a piezoelectric actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of operating a piezoelectric actuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4052631