Patents by Inventor Kiyoomi Kadoya
Kiyoomi Kadoya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11824528Abstract: Provided is a load drive device with high stability (linearity) and a control method thereof capable of continuing a normal operation without stopping the load drive device even when a reverse current is temporarily detected with a specific inductive load in the load drive device in which a plurality of inductive loads are connected in parallel.Type: GrantFiled: March 13, 2020Date of Patent: November 21, 2023Assignee: Hitachi Astemo, Ltd.Inventors: Hiroki Katabuchi, Kiyoomi Kadoya
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Publication number: 20220239295Abstract: Provided is a load drive device with high stability (linearity) and a control method thereof capable of continuing a normal operation without stopping the load drive device even when a reverse current is temporarily detected with a specific inductive load in the load drive device in which a plurality of inductive loads are connected in parallel.Type: ApplicationFiled: March 13, 2020Publication date: July 28, 2022Inventors: Hiroki KATABUCHI, Kiyoomi KADOYA
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Patent number: 10862292Abstract: There is provided a vehicle control device that allows high-speed diagnosis of a current breaker while assuring the accuracy of the current flowing to a load during the operation of the load. A smoothing capacitor (8) is connected in parallel to linear solenoid valves (13a and 13b). A current breaker (3a) and a reverse connection protector (4a) are connected in series from a battery (2) to a first connection point (P1) between the linear solenoid valves (13a and 13b) and the smoothing capacitor (8). A discharge unit (DU) is connected to a second connection point (P2) between the breaker (3a) and the reverse connection protector (4a) to discharge electric charge from the second connection point (P2).Type: GrantFiled: October 26, 2016Date of Patent: December 8, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventor: Kiyoomi Kadoya
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Publication number: 20180358798Abstract: There is provided a vehicle control device that allows high-speed diagnosis of a current breaker while assuring the accuracy of the current flowing to a load during the operation of the load. A smoothing capacitor (8) is connected in parallel to linear solenoid valves (13a and 13b). A current breaker (3a) and a reverse connection protector (4a) are connected in series from a battery (2) to a first connection point (P1) between the linear solenoid valves (13a and 13b) and the smoothing capacitor (8). A discharge unit (DU) is connected to a second connection point (P2) between the breaker (3a) and the reverse connection protector (4a) to discharge electric charge from the second connection point (P2).Type: ApplicationFiled: October 26, 2016Publication date: December 13, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventor: Kiyoomi KADOYA
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Patent number: 9600047Abstract: 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.Type: GrantFiled: February 1, 2013Date of Patent: March 21, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yasushi Sugiyama, Takuya Mayuzumi, Ryosuke Ishida, Yasuhiko Okada, Kiyoomi Kadoya, Kenichi Hoshino
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Patent number: 9126495Abstract: A reverse polarity protection circuit includes a p-channel MOSFET, an n-channel MOSFET, zener diodes, a coil that suppresses a backward flow of an electric current, a resistor that retains a voltage difference between a source of the p-channel MOSFET and a drain of the n-channel MOSFET, a resistor that protects the circuit if short-circuit destruction of the p-channel MOSFET occurs, a resistor that protects the circuit if short-circuit destruction of the n-channel MOSFET occurs, an electrolytic capacitor that suppresses fluctuation in an input voltage to a power supply control IC, a battery that supplies a voltage to an ECU, and the power supply control IC that generates a voltage for causing an IC in the ECU to operate.Type: GrantFiled: August 1, 2012Date of Patent: September 8, 2015Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yasushi Sugiyama, Takuya Mayuzumi, Yasuhiko Okada, Kiyoomi Kadoya
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Publication number: 20150039913Abstract: 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.Type: ApplicationFiled: February 1, 2013Publication date: February 5, 2015Inventors: Yasushi Sugiyama, Takuya Mayuzumi, Ryosuke Ishida, Yasuhiko Okada, Kiyoomi Kadoya, Kenichi Hoshino
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Publication number: 20150029682Abstract: Proposed is a C/U that is designed to accomplish the above object. The CU includes a multilayer circuit substrate, a resin cover, and a metal base. Electronic parts are mounted on both surfaces of the multilayer circuit substrate which is covered with the resin cover and the metal base. The multilayer circuit substrate 8 includes a signal pattern, a GND pattern, an important signal pattern, and a multilayer circuit substrate insulating layer. The GND pattern is electrically connected to the metal base through a screw. The GND pattern is disposed on the side of the resin cover in order to shield the important signal pattern against electromagnetic waves penetrating the resin cover to enter a housing and electromagnetic waves incident from the metal base side. The important signal pattern is disposed so that it is covered with the GND pattern and the metal case.Type: ApplicationFiled: February 8, 2013Publication date: January 29, 2015Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kiyoomi Kadoya, Ryosuke Ishida, Takuya Mayuzumi, Kenichi Hoshino, Yasuhiko Okada, Yasushi Sugiyama
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Publication number: 20130193754Abstract: A reverse polarity protection circuit includes a p-channel MOSFET, an n-channel MOSFET, zener diodes, a coil that suppresses a backward flow of an electric current, a resistor that retains a voltage difference between a source of the p-channel MOSFET and a drain of the n-channel MOSFET, a resistor that protects the circuit if short-circuit destruction of the p-channel MOSFET occurs, a resistor that protects the circuit if short-circuit destruction of the n-channel MOSFET occurs, an electrolytic capacitor that suppresses fluctuation in an input voltage to a power supply control IC, a battery that supplies a voltage to an ECU, and the power supply control IC that generates a voltage for causing an IC in the ECU to operate.Type: ApplicationFiled: August 1, 2012Publication date: August 1, 2013Inventors: Yasushi SUGIYAMA, Takuya MAYUZUMI, Yasuhiko OKADA, Kiyoomi KADOYA
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Patent number: 7934312Abstract: An electronic circuit device comprises: a printed circuit board mounted with electronic components; a resin-molded portion formed of resin so disposed that the electronic components are covered therewith; a convex connector that has metal terminals for connection and is exposed from the resin-molded portion; and a sealing member wrapped around the resin-molded portion.Type: GrantFiled: January 9, 2009Date of Patent: May 3, 2011Assignee: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Masahiro Sasaki, Kiyoomi Kadoya
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Patent number: 7924572Abstract: A module comprises a metallic terminal pins for connection and a circuit board with electronic components mounted thereon, a circuit board connecting side of the connector. The electronic components and the circuit board with the electronic components mounted thereon are encapsulated with the same resin. A metallic base is united to the module to obtain an electric conduction between the metallic base and the circuit board.Type: GrantFiled: February 28, 2008Date of Patent: April 12, 2011Assignee: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Shuji Eguchi, Masahiro Sasaki, Kiyoomi Kadoya
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Publication number: 20090119913Abstract: An electronic circuit device comprises: a printed circuit board mounted with electronic components; a resin-molded portion formed of resin so disposed that the electronic components are covered therewith; a convex connector that has metal terminals for connection and is exposed from the resin-molded portion; and a sealing member wrapped around the resin-molded portion.Type: ApplicationFiled: January 9, 2009Publication date: May 14, 2009Applicant: HITACHI, LTD.Inventors: Takuya Mayuzumi, Masahiro Sasaki, Kiyoomi Kadoya
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Patent number: 7514784Abstract: An electronic circuit device comprises: a printed circuit board mounted with electronic components; a resin-molded portion formed of resin so disposed that the electronic components are covered therewith; a convex connector that has metal terminals for connection and is exposed from the resin-molded portion; and a sealing member wrapped around the resin-molded portion.Type: GrantFiled: August 9, 2005Date of Patent: April 7, 2009Assignee: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Masahiro Sasaki, Kiyoomi Kadoya
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Patent number: 7417873Abstract: In resin-molded engine control unit, a coil, an electrolytic capacitor, a microprocessor, electronic parts and a connector terminal are mounted on a board. Inside a cover fixed on the board, a resin-free region is formed. The coil, the electrolytic capacitor and the microprocessor, which should not be sealed with resin, are mounted in the resin-free region, while the board and the electronic parts which are not capped by the cover are sealed with a resin.Type: GrantFiled: January 3, 2006Date of Patent: August 26, 2008Assignee: Hitachi, Ltd.Inventors: Kiyoomi Kadoya, Masahiro Sasaki, Takuya Mayuzumi
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Publication number: 20080165511Abstract: A module comprises a metallic terminal pins for connection and a circuit board with electronic components mounted thereon, a circuit board connecting side of the connector. The electronic components and the circuit board with the electronic components mounted thereon are encapsulated with the same resin. A metallic base is united to the module to obtain an electric conduction between the metallic base and the circuit board.Type: ApplicationFiled: February 28, 2008Publication date: July 10, 2008Applicant: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Shuji Eguchi, Masahiro Sasaki, Kiyoomi Kadoya
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Patent number: 7359212Abstract: A module comprises a metallic terminal pins for connection and a circuit board with electronic components mounted thereon, a circuit board connecting side of the connector. The electronic components and the circuit board with the electronic components mounted thereon are encapsulated with the same resin. A metallic base is united to the module to obtain an electric conduction between the metallic base and the circuit board.Type: GrantFiled: October 5, 2005Date of Patent: April 15, 2008Assignee: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Shuji Eguchi, Masahiro Sasaki, Kiyoomi Kadoya
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Publication number: 20060171127Abstract: In resin-molded engine control unit, a coil, an electrolytic capacitor, a microprocessor, electronic parts and a connector terminal are mounted on a board. Inside a cover fixed on the board, a resin-free region is formed. The coil, the electrolytic capacitor and the microprocessor, which should not be sealed with resin, are mounted in the resin-free region, while the board and the electronic parts which are not capped by the cover are sealed with a resin.Type: ApplicationFiled: January 3, 2006Publication date: August 3, 2006Applicant: Hitachi, Ltd.Inventors: Kiyoomi Kadoya, Masahiro Sasaki, Takuya Mayuzumi
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Publication number: 20060134937Abstract: An electronic circuit device comprises: a printed circuit board mounted with electronic components; a resin-molded portion formed of resin so disposed that the electronic components are covered therewith; a convex connector that has metal terminals for connection and is exposed from the resin-molded portion; and a sealing member wrapped around the resin-molded portion.Type: ApplicationFiled: August 9, 2005Publication date: June 22, 2006Applicant: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Masahiro Sasaki, Kiyoomi Kadoya
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Publication number: 20060077643Abstract: A module comprises a metallic terminal pins for connection and a circuit board with electronic components mounted thereon, a circuit board connecting side of the connector. The electronic components and the circuit board with the electronic components mounted thereon are encapsulated with the same resin. A metallic base is united to the module to obtain an electric conduction between the metallic base and the circuit board.Type: ApplicationFiled: October 5, 2005Publication date: April 13, 2006Applicant: Hitachi, Ltd.Inventors: Takuya Mayuzumi, Shuji Eguchi, Masahiro Sasaki, Kiyoomi Kadoya
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Publication number: 20060012034Abstract: An engine control circuit device which has higher heat resistance and can be installed in a place exposed to severe thermal environments. In an engine control circuit device comprising a circuit board on which a plurality of packaged electronic parts are mounted, and a connector mounted on the circuit board for connection to an external circuit, the device further comprises a resin portion formed of a thermo-setting resin and covering the connector except for a connecting portion thereof and the circuit board, and a cooling pipe integrally molded in the resin portion and allowing a coolant to flow through it, thereby cooling the resin portion.Type: ApplicationFiled: July 12, 2005Publication date: January 19, 2006Applicant: Hitachi, Ltd.Inventors: Kiyoomi Kadoya, Shuuji Eguchi, Masahiro Sasaki, Takuya Mayuzumi