Fuel injection apparatus

Details Fuel injection apparatus Fuel injection apparatus

2008-12-30

2010-11-09

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

C239S069000

Reexamination Certificate

active

07828228

ABSTRACT:
An inflection point sensing arrangement of an electronic drive unit, which drives a fuel injection valve, senses an inflection point in a pressure-changing process of the pressure in the control chamber. A charging and discharging condition changing arrangement of the electronic drive unit changes a charging condition for charging of the electric current to a piezoelectric actuator of the fuel injection valve or a discharging condition for discharging of the electric current from the piezoelectric actuator upon sensing of the inflection point, which is sensed with the inflection point sensing arrangement.

REFERENCES:
patent: 5779149 (1998-07-01), Hayes, Jr.
patent: 5979803 (1999-11-01), Peters et al.
patent: 6079641 (2000-06-01), Shinogle et al.
patent: 6820820 (2004-11-01), Boecking
patent: 2003/0226905 (2003-12-01), Cotton et al.
patent: 2003/0226990 (2003-12-01), Waterfield
patent: 2007/0152084 (2007-07-01), Boecking
patent: 2008/0245891 (2008-10-01), Mochizuki et al.
patent: 10-176624 (1998-06-01), None
patent: 10-306756 (1998-11-01), None
patent: 11-200981 (1999-07-01), None

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