公开(公告)号：US20170152803A1

公开(公告)日：2017-06-01

申请号：US15430757

申请日：2017-02-13

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： RYO KUSAKABE ,  Motoyuki Abe ,  Hideharu Ehara ,  Tohru Ishikawa ,  Takuya Mayuzumi ,  Kenji Hiraku

IPC: F02D41/20 ,  F02D41/30 ,  F02M51/06

CPC classification number: F02D41/20 ,  F02D41/3005 ,  F02D2041/2003 ,  F02D2041/2013 ,  F02D2041/2037 ,  F02D2041/2051 ,  F02M51/061 ,  F02M69/04

Abstract: In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.

公开(公告)号：US10280862B2

公开(公告)日：2019-05-07

申请号：US15430757

申请日：2017-02-13

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Ryo Kusakabe ,  Motoyuki Abe ,  Hideharu Ehara ,  Tohru Ishikawa ,  Takuya Mayuzumi ,  Kenji Hiraku

IPC: F02D41/20 ,  F02M51/06 ,  F02M69/04 ,  F02D41/30

Abstract: In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.

公开(公告)号：US10900435B2

公开(公告)日：2021-01-26

申请号：US16366168

申请日：2019-03-27

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Ryo Kusakabe ,  Motoyuki Abe ,  Hideharu Ehara ,  Tohru Ishikawa ,  Takuya Mayuzumi ,  Kenji Hiraku

IPC: F02D41/20 ,  F02M51/06 ,  F02M69/04 ,  F02D41/30

Abstract: In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.