公开(公告)号：US11859584B2

公开(公告)日：2024-01-02

申请号：US17925627

申请日：2021-02-05

申请人： Hitachi Astemo, Ltd.

发明人： Hirotaka Nakai ,  Osamu Mukaihara ,  Toshihiro Aono

IPC分类号： F02M59/36 ,  F02D41/34 ,  F02D45/00

CPC分类号： F02M59/366 ,  F02D41/34 ,  F02D45/00

摘要： Provided is a solenoid valve control device capable of detecting a motion of a valve body in response to a drive command without adding a special circuit.
According to the present invention, a solenoid valve control device controls opening and closing of a solenoid valve in an internal combustion engine system including: a fuel pump including a plunger that that increases or decreases a volume of a pressurizing chamber by moving up and down with rotation of a pump drive cam, a solenoid valve for sucking fuel into the pressurizing chamber, and a discharge valve for discharging fuel in the pressurizing chamber; and a fuel rail (common rail) that accumulates fuel discharged by the fuel pump. The solenoid valve control device includes a control unit that determines whether or not closing of the solenoid valve has succeeded based on fuel pressure 604 of the fuel rail, or calculates a discharge amount by closing the solenoid valve based on the fuel pressure of the fuel rail.

公开(公告)号：US11852093B2

公开(公告)日：2023-12-26

申请号：US17790367

申请日：2020-12-25

申请人： Hitachi Astemo, Ltd.

发明人： Toshihiro Aono ,  Osamu Mukaihara ,  Kenichiro Tokuo ,  Hirotaka Nakai ,  Kotaro Oki ,  Shunsuke Aritomi ,  Akiyasu Miyamoto

IPC分类号： F02D41/20 ,  F02D41/14 ,  F02M59/36

CPC分类号： F02D41/20 ,  F02D41/1401 ,  F02M59/368 ,  F02D2041/1432 ,  F02D2041/2034 ,  F02D2041/2037 ,  F02D2041/2055 ,  F02D2041/2058

摘要： Low noise control of a high-pressure fuel pump is performed by reducing noise generated by an anchor colliding with a fixing core. A control device 800 for a high-pressure fuel pump controls a suction valve that opens and closes an inflow port through which fuel flows to a pressurizing chamber by performing energization to a solenoid 205 in synchronization with a reciprocating motion of a plunger. A current energized to the solenoid 205 includes a peak current for giving a force to start closing a valve to the suction valve in a stationary state and a holding current for performing switching in a range smaller a maximum value of the peak current in order to hold the suction valve in a valve closing state. When the control device 800 reduces a peak current application amount of the peak current from a value sufficient to close the high-pressure fuel pump, a valve closing speed of the suction valve becomes small up to a certain application amount, and when the peak current application amount becomes smaller than the application amount, there is a saturation range of a current application amount of the peak current in which the valve closing speed of the suction valve is saturated. The control device 800 controls the current application amount of the peak current to fall in the saturation range.