Invention Grant
- Patent Title: Piezoelectric actuator drive device
- Patent Title (中): 压电致动器驱动装置
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Application No.: US12194159Application Date: 2008-08-19
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Publication No.: US07812503B2Publication Date: 2010-10-12
- Inventor: Tatsuya Kakehi , Noboru Nagase
- Applicant: Tatsuya Kakehi , Noboru Nagase
- Applicant Address: JP Kariya
- Assignee: Denso Corporation
- Current Assignee: Denso Corporation
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye PC
- Priority: JP2007-216155 20070822
- Main IPC: H01L41/08
- IPC: H01L41/08

Abstract:
A fuel injection control apparatus drives piezoelectric actuators for opening and closing injectors of respective cylinders based on energy stored in a capacitor of a DC/DC converter. A current detecting resistor for controlling a boost switch to charge the capacitor is disposed at a position at which current flowing through the capacitor is not detected. Further, current detecting resistors for controlling the piezoelectric actuators are disposed at positions at which charging current from a diode to the capacitor is not detected. Thus, the charging of the capacitor can be performed even during the control for charging/discharging the piezoelectric actuator.
Public/Granted literature
- US20090051247A1 PIEZOELECTRIC ACTUATOR DRIVE DEVICE AND DC/DC CONVERTER THEREFOR Public/Granted day:2009-02-26
Information query
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