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公开(公告)号：US10002699B2
公开(公告)日：2018-06-19
申请号：US14785528
申请日：2013-04-25
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Kiyoshi Aiki , Ayumu Hatanaka , Takuya Mayuzumi , Katsuya Oyama , Ryosuke Ishida , Yasushi Sugiyama
CPC classification number: H01F7/204 , F02D41/20 , F02D2041/001 , F02D2041/2041 , H02M1/44 , H02M3/155 , H02M2003/1555 , H03K17/162
Abstract: The present invention is to provide a magnet coil drive control device that can efficiently suppress conduction noise while reducing the capacitance of a capacitor. A capacitor and an impedance element are arranged in series on the connecting line connecting the positive electrode line and the negative electrode line of a DC power supply, the connecting line between the capacitor and the impedance element is connected to one end of a magnet coil via a freewheeling diode, and the portion between the freewheeling diode and the one end of the magnet coil is connected to the positive electrode line or the negative electrode line by a switching element. Conduction noise caused by the driving current of the magnet coil can be suppressed by the impedance element, and the capacitance of the capacitor can be further reduced. Accordingly, the magnet coil drive control device can be made smaller in size.
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公开(公告)号：US09600047B2
公开(公告)日：2017-03-21
申请号：US14379709
申请日：2013-02-01
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yasushi Sugiyama , Takuya Mayuzumi , Ryosuke Ishida , Yasuhiko Okada , Kiyoomi Kadoya , Kenichi Hoshino
CPC classification number: G06F1/28 , B60W10/18 , B60W2600/00 , B60W2710/18 , G01R19/16538 , G01R21/006 , G01R31/40 , G06F1/30 , G06F1/305
Abstract: Disclosed is an electronic control unit capable of identifying an abnormality in a power supply voltage without narrowing the operating voltage range, and having minimal effects on cost and the circuit mounting surface area. The ECU includes a microcomputer containing an input terminal VCCin and an input terminal Vrin, a power supply IC that supplies a power supply voltage VCC to the input terminal VCCin, and as a reference-voltage-generator circuit a voltage-divider resistor and a voltage-divider resistor configuring a voltage-dividing circuit that outputs a sub-divided voltage Vc is sub-divided from the power supply voltage VCC, a capacitor coupled at one end to the input terminal Vrin and coupled on at the other end to ground, and a voltage isolation element coupled between the voltage-dividing circuit and the input terminal Vrin.
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公开(公告)号：US11079730B2
公开(公告)日：2021-08-03
申请号：US16464675
申请日：2017-10-24
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Katsuya Oyama , Mitsuhiko Watanabe , Takeshi Konno , Yasushi Sugiyama , Chihiro Sato
IPC: B60L15/32 , H04L7/02 , F02D41/26 , F02D41/28 , G05B19/042 , B60R16/023 , H03K17/08 , H03K17/687 , B60R16/02 , F02D45/00
Abstract: The present disclosure provides a control device having versatility and extensibility of a load driving circuit. A control device includes a processor and an IC, in which the IC includes: a communication circuit that transmits a control signal from the processor; a first drive circuit that drives a first load; a second drive circuit that drives a second load and is provided outside the IC separately from the first drive circuit; and a third drive circuit that controls the second drive circuit, the processor transmits channel information corresponding to the number of switches of the second drive circuit to the IC, and the communication circuit changes the number of channels of the third drive circuit on the basis of the channel information.
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公开(公告)号：US11050345B2
公开(公告)日：2021-06-29
申请号：US16619001
申请日：2018-04-24
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Ming Liu , Taizo Yamawaki , Atsushi Arata , Yasushi Sugiyama , Ryusuke Sahara
Abstract: A power supply apparatus that can realize ripple reduction, and an electronic control unit including the power supply apparatus are provided. In view of this, a PWM controller generates a PWM signal, and a PFM controller generates a PFM signal having a phase independent of the PWM signal. A level-fixed period generating circuit sets a level-fixed period having a start timing at a selection timing set to an edge of the PFM signal. A mode selecting circuit selects, at the selection timing and as a switching control signal, the PWM signal instead of the PFM signal, and controls a logic level of the switching control signal in the level-fixed period starting at the selection timing, such that the logic level becomes a fixed logic level.
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公开(公告)号：US11635472B2
公开(公告)日：2023-04-25
申请号：US17054973
申请日：2019-02-14
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Yuri Ohara , Yasushi Sugiyama , Takeo Yamashita , Masahiro Doi
IPC: B60W20/00 , G01R31/50 , B60W20/50 , B60W50/02 , H02P29/024
Abstract: A load driving device includes a synchronous rectifier circuit having a driving-side switching element and a reflux-side switching element; a driver control circuit controls the synchronous rectifier circuit; and a voltage monitor circuit that monitors whether the voltage of an output terminal of the synchronous rectifier circuit is within a predetermined voltage range; where the driver control circuit, upon receiving a diagnosis command, performs control so that when the driving-side switching element is switched from ON to OFF, the reflux-Side switching element is also switched to OFF; and the voltage monitor circuit detects a normal state when the voltage to be monitored is within a normal level during a period in which both the driving-side switching element and the reflux-side switching element are turned OFF.
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Patent Agency Ranking
公开(公告)号：US11008988B2
公开(公告)日：2021-05-18
申请号：US16487382
申请日：2018-01-29
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Yasushi Sugiyama , Atsushi Arata , Yasuo Shima , Masahiro Doi
Abstract: An electronic control device has a compact abnormality detection circuit that does not require a complicated circuit, and is capable of suppressing a cost increase when being applied a direct injection injector drive circuit and other drive circuits. A current detection circuit includes a current detection resistor, a differential amplifier, and a current detection unit. The current detected is supplied to the abnormality/normality determination unit. A combined resistance value of a diagnostic current drive circuit and the current detection resistor is higher than an injector drive circuit. A fuel injection signal is input to a logic circuit, and a fuel cut signal is input to a different terminal of the logic circuit. The logic circuit's output terminal is connected to the injector drive circuit's gate. The output signal from a fuel injection signal output unit is supplied via a switch to the diagnostic current drive circuit's gate.
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公开(公告)号：US20150039913A1
公开(公告)日：2015-02-05
申请号：US14379709
申请日：2013-02-01
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yasushi Sugiyama , Takuya Mayuzumi , Ryosuke Ishida , Yasuhiko Okada , Kiyoomi Kadoya , Kenichi Hoshino
CPC classification number: G06F1/28 , B60W10/18 , B60W2600/00 , B60W2710/18 , G01R19/16538 , G01R21/006 , G01R31/40 , G06F1/30 , G06F1/305
Abstract: Disclosed is an electronic control unit capable of identifying an abnormality in a power supply voltage without narrowing the operating voltage range, and having minimal effects on cost and the circuit mounting surface area. The ECU includes a microcomputer containing an input terminal VCCin and an input terminal Vrin, a power supply IC that supplies a power supply voltage VCC to the input terminal VCCin, and as a reference-voltage-generator circuit a voltage-divider resistor and a voltage-divider resistor configuring a voltage-dividing circuit that outputs a sub-divided voltage Vc is sub-divided from the power supply voltage VCC, a capacitor coupled at one end to the input terminal Vrin and coupled on at the other end to ground, and a voltage isolation element coupled between the voltage-dividing circuit and the input terminal Vrin.
Abstract translation: 公开了一种电子控制单元，其能够识别电源电压的异常而不使工作电压范围变窄，并且对成本和电路安装表面积的影响最小。 ECU包括微型计算机，其包含输入端子VCCin和输入端子Vrin，向输入端子VCCin提供电源电压VCC的电源IC，以及作为参考电压发生器电路的分压电阻器和电压 将构成分压电路Vc的分压电阻构成为从电源电压VCC分压，一端耦合到输入端子Vrin并在另一端耦合到地， 耦合在分压电路和输入端子Vrin之间的电压隔离元件。
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公开(公告)号：US10340833B2
公开(公告)日：2019-07-02
申请号：US15580957
申请日：2016-04-12
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Ming Liu , Taizo Yamawaki , Takuya Mayuzumi , Ryosuke Ishida , Yasushi Sugiyama , Goichi Ono
IPC: H02P27/06 , H02P29/024 , H02P3/22
Abstract: To achieve, in a load drive device including an H-bridge circuit, miniaturization of a capacitor or/and the constituent elements of the H-bridge circuit (e.g., reduction in volume) with circuit elements, for example, switching elements included in the H-bridge circuit, being inhibited from breaking down or destroying even in a case where a load is overloaded. The invention is disclosed in which, as a solution to the achievement, first and second modes are provided as a switching mode for the switching elements 11, 12, 13, and 14 and switching is appropriately performed between the first and second modes.
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公开(公告)号：US10340799B2
公开(公告)日：2019-07-02
申请号：US15772128
申请日：2016-09-28
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Ming Liu , Shinya Kajiyama , Taizo Yamawaki , Ryosuke Ishida , Hirofumi Kurimoto , Yasushi Sugiyama
Abstract: A step-up/down power supply, in which a circuit area is small, includes a step-down unit that generates an output voltage lower than an input voltage by turning on or off a step-down switch in which the input voltage of the step-up/down power supply is applied, and a step-up unit that generates an output voltage higher than the input voltage by turning on or off a step-up switch in which a ground is applied. A step-down gate voltage control circuit controls a gate voltage of the step-down switch and includes a gate voltage generating circuit that generates a first voltage and a second voltage for turning on the step-down switch. A gate voltage switching circuit switches between the first voltage and the second voltage, and the gate voltage generating circuit includes a first voltage source that generates the first voltage and a second voltage source that generates the second voltage.
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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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