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11.发明授权公开(公告)号：US11300070B2
公开(公告)日：2022-04-12
申请号：US16267125
申请日：2019-02-04
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Toshihiro Aono , Motoyuki Abe , Ryo Kusakabe , Teppei Hirotsu , Ayumu Hatanaka , Hideyuki Sakamoto , Takao Fukuda , Masahiro Toyohara , Osamu Mukaihara
Abstract: An electromagnetic valve control unit for detecting operation of an electromagnetic valve on the basis of a drive voltage or a drive current applied to the electromagnetic valve. The electromagnetic valve control unit includes an A/D converter, a filter, and a detection unit. The A/D converter converts the drive voltage or the drive current into a digital signal. The filter has a gain of about zero at a predetermined frequency. The detection unit detects operation of the electromagnetic valve on the basis of an output of the filter upon input of the digital signal into the filter.
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公开(公告)号：US10711721B2
公开(公告)日：2020-07-14
申请号：US15306269
申请日：2015-03-25
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Osamu Mukaihara , Masahiro Toyohara , Hideharu Ehara
Abstract: Because the relationship of the fuel injection quantity to a designated injection period differs in a half-lift region and a full-lift region, the purpose of the present invention is to bring the flow rate characteristics of an intermediate-lift region close to the flow rate characteristics of the full-lift region and improve the controllability of small fuel injection quantities. Provided are a peak current supply period in which a valve body of a fuel injection valve causes the magnetic force necessary for a valve-opening action to be generated, and a lift quantity adjustment period in which, after the peak current supply period, a current lower than the peak current is passed for a prescribed period; further provided is a current interrupt period in which a drive current is rapidly lowered before the lift quantity adjustment period.
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13.发明授权公开(公告)号：US10240551B2
公开(公告)日：2019-03-26
申请号：US14784653
申请日：2014-03-07
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Toshihiro Aono , Motoyuki Abe , Ryo Kusakabe , Teppei Hirotsu , Ayumu Hatanaka , Hideyuki Sakamoto , Takao Fukuda , Masahiro Toyohara , Osamu Mukaihara
Abstract: Provided are an electromagnetic valve control unit and a fuel injection control device using the same that can precisely detect a change of an operating state of an electromagnetic valve, that is, a valve opening time or a valve closing time of the electromagnetic valve, precisely correct a drive voltage or a drive current applied to the electromagnetic valve, and appropriately control opening/closing of the electromagnetic valve, with a simple configuration. In an electromagnetic valve control unit for controlling opening/closing of an electromagnetic valve by a drive voltage and a drive current to be applied, the drive voltage and the drive current applied to the electromagnetic valve are corrected on the basis of a detection time of an inflection point from time series data of the drive voltage and the drive current when the electromagnetic valve is opened/closed.
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公开(公告)号：US10240547B2
公开(公告)日：2019-03-26
申请号：US15579816
申请日：2016-06-01
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Haoyun Shi , Yuuki Okuda , Masahiro Toyohara
Abstract: Provided is a fuel injection control device capable of accurately detecting a valve opening delay time of a fuel injection valve, and implementing high-precision minute injection control. A valve opening delay time of a fuel injection valve is estimated on the basis of a plurality of valve closing delay times obtained when the fuel injection valve is operated with injection pulse widths that are different injection pulse widths from each other and with which the fuel injection valve is in an intermediate lift state.
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公开(公告)号：US10961935B2
公开(公告)日：2021-03-30
申请号：US15891909
申请日：2018-02-08
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Ryo Kusakabe , Motoyuki Abe , Ayumu Hatanaka , Toshihiro Aono , Teppei Hirotsu , Hideyuki Sakamoto , Masahiro Toyohara , Osamu Mukaihara , Takao Fukuda , Yoshihito Yasukawa , Akiyasu Miyamoto
Abstract: A drive device capable of detecting individual variations of an injection quantity of a fuel injection device of each cylinder and adjusting a current waveform provided to an injection pulse width and a solenoid such that the individual variations of the fuel injection devices are reduced. The fuel injection device in the present invention includes a valve body that close a fuel passage by coming into contact with a valve seat and opens the fuel passage by separating from the valve seat and a magnetic circuit constructed of a solenoid, a fixed core, a nozzle holder a housing and a needle and when a current is supplied to the solenoid a magnetic suction force acts on the needle and the needle has a function to open the valve body by colliding against the valve body after performing a free running operation and changes of acceleration of the needle due to collision of the needle against the valve body are detected by a current flowing through the solenoid.
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Patent Agency Ranking
公开(公告)号：US10677184B2
公开(公告)日：2020-06-09
申请号：US15024667
申请日：2014-06-16
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Ryo Kusakabe , Toshihiro Aono , Motoyuki Abe , Takuya Mayuzumi , Masahiro Toyohara , Takashi Okamoto , Osamu Mukaihara , Shinji Nakagawa , Yusuke Kihara
Abstract: An object of the invention is to provide a drive device of a fuel injection device which can increase the accuracy in an injected fuel injection amount by combining the fuel injections from a plurality of injection pulse widths. In the drive device of the fuel injection device which has a function of driving the fuel injection device such that the fuel injection is performed plural times in one combustion cycle, the fuel injection device is driven such that a fuel injection at a target opening level in which a valve element or a movable element of the fuel injection device reaches a regulation member and a fuel injection at an intermediate opening level in which the valve element does not reach the regulation member are included in the plural times of division injections performed in one combustion cycle.
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公开(公告)号：US10655557B2
公开(公告)日：2020-05-19
申请号：US15504397
申请日：2015-08-05
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Satoshi Matsuda , Masahiro Toyohara , Osamu Mukaihara , Makoto Ijyuin
Abstract: In control device of an internal combustion engine, for each first period, a calculation unit calculates number of fuel injections within one combustion cycle and fuel injection rate. For first period, a first storage unit stores number of fuel injections and fuel injection rate of calculation unit. For each second period, a reference unit refers to the number of fuel injections and fuel injection rate stored by the first storage unit. A second storage unit stores for an interval, from the start time of the first fuel injection until start of the last fuel injection of at least one combustion cycle, the number of fuel injections and fuel injection rate referred to by reference unit. A control unit controls a fuel injection valve so that fuel is injected in accordance with the number of fuel injections fuel injection rate stored by second storage unit.
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公开(公告)号：US10309336B2
公开(公告)日：2019-06-04
申请号：US15540310
申请日：2016-01-29
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Osamu Mukaihara , Masahiro Toyohara
Abstract: The present invention determines whether multi-stage injection control is operating normally or abnormally, and carries out a failsafe of multi-stage injection control as necessary. The present invention, which solves the problem described above, has means such as the following. The invention is provided with fuel injection valves provided respectively to each cylinder, an opened/closed valve detection means for detecting either one or both of an open valve state and a closed valve state of the fuel injection valves on the basis of the drive currents or drive voltages of the fuel injection valves, and a detection execution determination means for determining a detection execution time period including the detection start timing and the detection end timing of the open valve state or closed valve state; detection interference such as overlapping detection with another cylinder and overlapping of open valve detection and closed valve detection being preventable, and risks such as erroneous detection being reducible.
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公开(公告)号：US10247125B2
公开(公告)日：2019-04-02
申请号：US15534084
申请日：2015-12-07
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Toshihiro Aono , Motoyuki Abe , Masahiro Toyohara , Osamu Mukaihara
Abstract: The purpose of the present invention is to provide a fuel injection valve control device with which variability in the injection amount with respect to drive pulse width can be kept to a satisfactory level in each of a plurality of fuel injection devices. The present invention provides a fuel injection valve control device for controlling a plurality of fuel injection devices each equipped with a valve body and a solenoid for opening the valve body, characterized in that the device is configured such that, a prescribed time after voltage has been applied to the solenoid, a holding current is applied, the prescribed time and the holding current being corrected for each of the fuel injection devices, on the basis of the operating characteristics of the fuel injection device.
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公开(公告)号：US09783138B2
公开(公告)日：2017-10-10
申请号：US14769735
申请日：2014-01-31
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Shinichiro Yoneoka , Yasuhiko Okada , Chihiro Sato , Koji Yuasa , Masahiro Toyohara , Yasushi Sugiyama
IPC: B60R16/023 , G07C5/08 , G05B15/02 , G06F13/42
CPC classification number: B60R16/023 , G05B15/02 , G06F13/4291 , G07C5/0808
Abstract: In a vehicle control device in which a driver circuit which does not have a computing function and a computing device communicate with each other, there is provided a technology which can efficiently diagnose that both the driver circuit and the computing device normally communicate with each other by a simple technique. The vehicle control device according to the present invention transmits diagnosis data as a control command from a computing portion to the driver circuit, and the driver circuit sends inverted diagnosis data in which the diagnosis data is bit-inverted back to the computing portion. The computing portion diagnoses whether or not the communication between the computing portion and the driver circuit is normally performed, by using the diagnosis data and the inverted diagnosis data.
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