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1. (WO2017033643) BOOSTER DEVICE FOR DRIVING INJECTOR

Pub. No.:    WO/2017/033643    International Application No.:    PCT/JP2016/071659
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Tue Jul 26 01:59:59 CEST 2016
IPC: F02D 41/20
F02D 41/08
F02D 41/34
F02M 51/00
F02M 51/06
F02M 61/10
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: TSUKIO Koichi
槻尾 浩一
Title: BOOSTER DEVICE FOR DRIVING INJECTOR
Abstract:
Provided is a booster device for driving an injector, with which an insufficiency in the boost voltage applied to an injector can be minimized even for a short fuel injection interval. A boost driver 1 (switching element) is connected in series to a boost coil 4, and turns on/off the supply of current to the boost coil 4. A boost capacitor 7 applies a voltage to an injector. A boost diode 6 has an anode connected to the connection point of the boost coil 4 and the boost driver 1, and a cathode connected to the boost capacitor 7. When a determination period indicating a period in accordance with the injection interval of the injector is equal to or less than a first threshold value, a boost gate control circuit 11 controls the turning on/off of the boost driver 1 so as to increase the charging speed of the boost capacitor 7.