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公开(公告)号：US20230228227A1
公开(公告)日：2023-07-20
申请号：US18009205
申请日：2021-02-09
申请人： Hitachi Astemo, Ltd.
发明人： Fumihiro ITABA , Osamu MUKAIHARA
摘要： In abnormality determination of determining whether fuel injection has been executed normally, making an erroneous determination is prevented. A fuel injection control device 127 that controls a plurality of fuel injection valves each having a coil for energization includes a drive state detection unit 211 that detects a drive state of a fuel injection valve, from an energization current or an applied voltage of the coil of the fuel injection valve, an injection abnormality detection unit 213 that detects an injection abnormality of the fuel injection valve by comparing a fuel injection instruction with the drive state of the fuel injection valve, and an injection abnormality detection execution determining unit 212 that based on a state of an internal combustion engine, determines whether or not to permit execution of injection abnormality detection by the injection abnormality detection unit 213.
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公开(公告)号：US20220220916A1
公开(公告)日：2022-07-14
申请号：US17595285
申请日：2020-03-11
申请人： HITACHI ASTEMO, LTD.
发明人： Fumihiro ITABA , Osamu MUKAIHARA , Satoshi KOJIMA
摘要： Appropriate detection of an abnormality of voltage information, which is a basis for correcting a fuel injection amount, becomes possible. For this reason, a fuel injection control device 127, which has a drive IC 208 controlling a fuel injection drive unit 207a to supply a high voltage to a solenoid 405 so as to open a fuel injection valve 105 and controlling the fuel injection drive unit 207a to supply a low voltage to the solenoid 405 so as to hold a valve-open state of the fuel injection valve 105, includes: a drive voltage input unit 211 that measures and outputs voltage information based on an upstream voltage of the solenoid 405 of the fuel injection valve 105 and a downstream voltage of the solenoid 405; a fuel injection amount correction unit 213 that corrects a fuel injection amount of the fuel injection valve 105 based on the voltage information output from the drive voltage input unit 211; and a voltage input function abnormality detection unit 212 that detects whether an output of the drive voltage input unit 211 is abnormal based on the voltage information output from the drive voltage input unit 211.
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公开(公告)号：US20240151189A1
公开(公告)日：2024-05-09
申请号：US18281996
申请日：2022-01-25
申请人： Hitachi Astemo, Ltd.
发明人： Fumihiro ITABA , Osamu MUKAIHARA
CPC分类号： F02D41/20 , F02D41/30 , F02M51/061
摘要： An object of the present invention is to provide a fuel injection control device capable of improving the execution frequency and accuracy of individual difference detection of a plurality of fuel injection valves. Therefore, the fuel injection control device 127 is configured to measure, as a valve closing time, a time from when energization of the solenoid 407 is finished to when the valve body 402 moves to the valve closing position for each of the plurality of fuel injection valves 105; divide an energization time of the solenoid 407 into a plurality of sections 1001 to 1004; calculate, as an average valve closing time, an average value of the valve closing times measured a plurality of times, in each of the plurality of sections 1001 to 1004; calculate a specific valve closing time based on the average valve closing time of at least one section among the plurality of sections 1001 to 1004; and correct the energization time according to the specific valve closing time of each of the plurality of fuel injection valves 105.
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公开(公告)号：US20220412282A1
公开(公告)日：2022-12-29
申请号：US17777986
申请日：2020-11-04
申请人： HITACHI ASTEMO, LTD.
发明人： Fumihiro ITABA , Osamu MUKAIHARA , Takao MIYAKE , Takuya WATAI
摘要： An injection amount variation of a plurality of fuel injection valves is reduced regardless of a state of an engine. According to one aspect of the present invention, there is provided a fuel injection control device 127 that controls a plurality of fuel injection valves having a coil for energization, including a valve body operation time detection unit 211 that detects a valve closing completion time from an end of energization of the fuel injection valve to completion of valve closing of a valve body of the fuel injection valve, a drive current correction unit 213 that corrects a drive current parameter of the fuel injection valve based on the valve closing completion time, an injection pulse width correction unit 214 that corrects an energization time of the fuel injection valve based on the valve closing completion time, and a correction method selection unit 212 that selects at least one of the drive current correction unit 213 and the injection pulse width correction unit 214 to execute correction based on a state of an engine.
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公开(公告)号：US20230193867A1
公开(公告)日：2023-06-22
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
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：US20230193843A1
公开(公告)日：2023-06-22
申请号：US17925736
申请日：2021-02-05
申请人： Hitachi Astemo, Ltd.
发明人： Kotaro OKI , Osamu MUKAIHARA
CPC分类号： F02D41/009 , F02D13/0215 , F01L1/3442 , F01L2820/041 , F01L2820/042
摘要： To provide a control device capable of calculating a cam phase equal to an actual cam angle even when a corresponding cam angle signal detection range is exceeded by changing a cam phase by a variable valve mechanism. In addition to the conventional cam angle measuring function, a cam angle measuring means for advancing or retarding beyond a cam angle measurement reference position, and a means for determining that the cam angle signal advances or retards beyond the cam angle measurement reference position are provided. By switching the cam angle measuring function according to a determination result as to whether the cam angle signal exceeds the cam angle measurement reference position, it is possible to improve the time resolution of the angle measurement while maintaining the cam phase change amount at the same wide angle as the conventional one.
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公开(公告)号：US20230213013A1
公开(公告)日：2023-07-06
申请号：US17927992
申请日：2021-02-12
申请人： Hitachi Astemo, Ltd.
CPC分类号： F02P5/1516 , F02P5/153 , F02P3/0407
摘要： Provided is an ignition control device capable of suppressing wear of an ignition plug due to occurrence of a re-strike without adding a component. An ECU 123 used as an ignition control device includes: an ignition signal calculation unit 203 that calculates a start timing and an end timing of re-energization with a primary current in one ignition process, compares the end timing of the re-energization with the timing at which the frequency of occurrence of a re-strike decreases, and determines whether to perform the re-energization; and an ignition signal generation unit 204 that generates an ignition signal for generating at least one or more spark discharges in the ignition process, outputs the ignition signal to the ignition coil, then generates the ignition signal when the ignition signal calculation unit determines to perform the re-energization, outputs the ignition signal to the ignition coil at the start timing of the re-energization, and does not generate the ignition signal when the ignition signal calculation unit determines not to perform the re-energization.
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公开(公告)号：US20230038318A1
公开(公告)日：2023-02-09
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
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.
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公开(公告)号：US20220010747A1
公开(公告)日：2022-01-13
申请号：US17294718
申请日：2019-12-04
申请人： Hitachi Astemo, Ltd.
摘要： Provided is a fuel injection control device capable of reducing variations in injection amounts of a plurality of fuel injection valves. Thus, the fuel injection control device of the present invention includes a control unit that controls voltages applied to coils of a plurality of fuel injection valves, the coils being adapted for energization. The control unit performs control such that the voltage being applied to the coil is cut off. The control unit changes a timing at which the cutoff of the voltage to the coil of at least one fuel injection valve is started or a timing at which the cutoff of the voltage to the coil of at least one fuel injection valve is ended, based on a valve closing time until closing of the fuel injection valve is completed or a valve opening time until opening of the fuel injection valve is completed.
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