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公开(公告)号：US11098689B2
公开(公告)日：2021-08-24
申请号：US16963893
申请日：2019-01-11
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yasuo Shima , Koji Shibata , Yoichiro Kobayashi
IPC: F02P3/04
Abstract: It is made possible to control ignition appropriately.
An ignition device 1 for an internal combustion engine includes a spark coil 50 including: a primary side coil 51 connected to a direct current power supply 40 and a secondary side coil 52 magnetically connected to the primary side coil 51 and connected to an ignition plug 60; a switch element 30 that performs switching between energization and interruption of primary current I1 to the primary side coil 51; and a switch element controlling circuit 20 that controls the switch element 30 on the basis of an ignition controlling signal 51 supplied from an ECU 10. A turn-on delay adjustment circuit 22 that delays a control timing of the switch element 30 is disposed between the ECU 10 and the switch element 30 such that first resonance noise generated due to interruption of the primary current I1 to the primary side coil 51 is reduced.-
公开(公告)号：US11542885B2
公开(公告)日：2023-01-03
申请号：US17052888
申请日：2019-06-11
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yasuo Shima , Yoshihisa Fujii , Takeo Yamashita
Abstract: With a simple configuration, responsiveness between an electronic control unit and a load drive circuit is monitored without deteriorating characteristics of the load drive circuit. The load drive circuit according to the present invention diagnoses an abnormality in responsiveness of a switch element that drives a load based on a drive command of the switch element and a signal at an output terminal of the switch element.
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公开(公告)号：US11459996B2
公开(公告)日：2022-10-04
申请号：US17274228
申请日：2019-08-08
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yuri Ohara , Yasuo Shima , Masahiro Doi , Takeo Yamashita
Abstract: Provided is an electronic control unit capable of performing a high-accurate failure diagnosis in a short time as an electronic control unit having a failure diagnosis function. A load drive circuit that drives a load, a control circuit that controls the load drive circuit, and a diagnosis circuit that diagnoses an output state of the load drive circuit and outputs a diagnostic result to the control circuit are provided. The diagnosis circuit outputs a diagnosis completion flag indicating whether or not there is a diagnosis opportunity to the control circuit.
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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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