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公开(公告)号：US11466657B2
公开(公告)日：2022-10-11
申请号：US17287931
申请日：2019-10-04
申请人： Hitachi Astemo, Ltd.
发明人： Eiichirou Ohata
摘要： To suppress a failure of ignition of a fuel caused by a spark plug while suppressing wear of an electrode of the spark plug in an internal combustion engine. A control device 1 for an internal combustion engine includes an ignition control unit that controls energization of an ignition coil 300 that applies electric energy to a spark plug 200 that discharges in a cylinder 150 of an internal combustion engine 100 to ignite a fuel. The ignition control unit continuously transmits a first pulse signal (pulse signal for corona discharge) to an igniter connected to the ignition coil 300 before dielectric breakdown between electrodes of the spark plug 200, and continuously transmits a second pulse signal (pulse signal for arc discharge) to the igniter after the dielectric breakdown between the electrodes of the spark plug 200 to control the energization of the ignition coil 300. At this time, a period of the pulse signal for corona discharge is shorter than a period of the pulse signal for arc discharge.
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公开(公告)号：US11802534B2
公开(公告)日：2023-10-31
申请号：US17595680
申请日：2020-03-27
申请人： Hitachi Astemo, Ltd.
发明人： Eiichirou Ohata
CPC分类号： F02P3/0414 , F02D41/0047 , F02P5/1516 , F02P15/08 , F02D37/02 , F02D41/005 , F02D41/34 , F02P3/04
摘要： The present invention is provided to suppress the power consumption, the calorific value, and the volume of an ignition device in an internal combustion engine while suppressing failures in igniting fuel by an ignition plug. To achieve this, a control device 1 for the internal combustion engine includes an ignition control unit that controls energization of an ignition coil 300 that gives electric energy to an ignition plug 200 that discharges in a cylinder 150 of an internal combustion engine 100 to ignite fuel. The ignition control unit controls energization of the ignition coil 300 so that first electric energy is released from the ignition coil 300 while second electric energy is released as electric energy superposed on the first electric energy, the second electric energy changing based on a gas state around the ignition plug 200.
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公开(公告)号：US11371459B2
公开(公告)日：2022-06-28
申请号：US17294910
申请日：2019-10-29
申请人： Hitachi Astemo, Ltd.
发明人： Eiichirou Ohata
摘要： To appropriately adjust a pressure of a fuel according to a valve closing force of a fuel injection valve. To that end, a control device for an internal combustion engine includes a fuel pressure control unit that controls a pressure of a fuel supplied to a fuel injection valve that injects the fuel to an internal combustion engine. The fuel injection valve includes a plunger rod that is a valve body, a solenoid coil that is a drive unit for driving the plunger rod, and an orifice cup in which a fuel injection hole that is opened and closed according to drive of the plunger rod is formed. A cylinder pressure sensor that detects an in-cylinder pressure is attached to the internal combustion engine. The fuel pressure control unit controls the pressure of the fuel based on a pressure difference ΔP between the in-cylinder pressure detected by the cylinder pressure sensor before the plunger rod is separated from a seat portion of the orifice cup which is a valve seat and the in-cylinder pressure detected by the cylinder pressure sensor when the plunger rod is separated from the seat portion of the orifice cup.
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