Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tatsushi Nakashima0
Kouichi Mochizuki0
Masatoshi Kuroyanagi0
Date of Patent
November 9, 2010
Patent Application Number
12345700
Date Filed
December 30, 2008
Patent Primary Examiner
Patent 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.
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