公开(公告)号：EP3339615B1

公开(公告)日：2020-11-25

申请号：EP16838990.6

申请日：2016-07-25

申请人： Hitachi Automotive Systems, Ltd.

发明人： TSUKIO, Koichi

IPC分类号： F02D41/20 ,  F02D41/08 ,  F02D41/34 ,  F02M51/00 ,  F02M51/06 ,  F02M61/10

公开(公告)号：EP3339615A1

公开(公告)日：2018-06-27

申请号：EP16838990.6

申请日：2016-07-25

申请人： Hitachi Automotive Systems, Ltd.

发明人： TSUKIO, Koichi

IPC分类号： F02D41/20 ,  F02D41/08 ,  F02D41/34 ,  F02M51/00 ,  F02M51/06 ,  F02M61/10

CPC分类号： F02D41/20 ,  F02D41/08 ,  F02D41/34 ,  F02D41/402 ,  F02D2041/2013 ,  F02D2041/2058 ,  F02D2041/2068 ,  F02D2041/389 ,  F02M51/00 ,  F02M51/06 ,  F02M61/10

摘要： Provided is booster device for driving an injector which can suppress an insufficiency of a boost voltage applied to the injector even when the fuel injection interval is short.
A boost driver 1 (switching element) is connected to a boost coil 4 in series and turns on/off the conduction of the boost coil 4. A boost capacitor 7 applies a voltage to the injector. A boost diode 6 has an anode connected to a connection point of the boost coil 4 and the boost driver 1 and a cathode connected to the boost capacitor 7. A boost gate control circuit 11 controls the boost driver 1 to be turned on/off so as to increase a charging speed of the boost capacitor 7 increases when a decision period indicating a period corresponding to an injection interval of the injector is equal to or less than the first threshold value.