Patents by Inventor Tomoaki HORII
Tomoaki HORII 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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Publication number: 20240101093Abstract: A vehicle brake system includes a switching valve switchable between a first state allowing communication between a first fluid pressure generating device and a frictional brake and a second state allowing communication between a second fluid pressure generating device and the frictional brake. The second fluid pressure generating device generates a fluid pressure by moving a piston with an electric actuator, and has a fluid pressure supply port connected to the switching valve and an atmosphere opening port connected to a reservoir tank. When, due to a failure, the switching valve becomes a third state in which the switching valve makes each of the first fluid pressure generating device and the second fluid pressure generating device communicate with the frictional brake, a control device controls the second fluid pressure generating device to close the atmosphere opening port with the piston.Type: ApplicationFiled: September 20, 2023Publication date: March 28, 2024Inventors: Atsuki OHIRA, Eisuke HORII, Hiroyuki IWASAKI, Masayuki UENO, Shotaro YAMAZAKI, Takashi SHIMADA, Tomoaki KOTAKI, Yohei SATO
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Publication number: 20240075915Abstract: A vehicle brake system includes a first fluid pressure generating device for generating a fluid pressure according to a brake operating amount, a second fluid pressure generating device for generating a fluid pressure by moving a piston with an electric actuator, and a switching valve switchable between a first state allowing communication between the first fluid pressure generating device and a vehicle behavior stabilizing device and a second state allowing communication between the second fluid pressure generating device and the vehicle behavior stabilizing device. A control device places the switching valve in the second state during execution of automatic brake control, and places the switching valve in the first state when a predetermined abnormality occurs in the vehicle, except that the control device places the switching valve in the second state when an abnormality including inability of the second fluid pressure generating device to generate the fluid pressure occurs.Type: ApplicationFiled: September 5, 2023Publication date: March 7, 2024Inventors: Eisuke HORII, Hiroyuki IWASAKI, Yohei SATO, Tomoaki KOTAKI, Masayuki UENO, Shotaro YAMAZAKI, Atsuki OHIRA
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Patent number: 10876492Abstract: Provided is a device for controlling a fuel injection device capable of suppressing deterioration of exhaust performance while ensuring driving performance when acceleration of a vehicle is requested during an intake stroke. Therefore, when the acceleration of a vehicle is requested during an intake stroke in one combustion cycle, an engine control unit 9 estimates an increase (acceleration intake air amount Qad) of the amount of air taken in a combustion chamber 19 of an internal combustion engine 1 associated with the acceleration of the vehicle after the acceleration of the vehicle is requested in one combustion cycle based on a lift amount of an intake valve 3. The engine control unit 9 controls a fuel injection valve 5 so as to increase a fuel injection amount in one combustion cycle according to the acceleration intake air amount Qad.Type: GrantFiled: June 12, 2017Date of Patent: December 29, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Tomoaki Horii, Tei Ho, Kazuya Saito
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Publication number: 20200182186Abstract: Provided is a device for controlling a fuel injection device capable of suppressing deterioration of exhaust performance while ensuring driving performance when acceleration of a vehicle is requested during an intake stroke. Therefore, when the acceleration of a vehicle is requested during an intake stroke in one combustion cycle, an engine control unit 9 estimates an increase (acceleration intake air amount Qad) of the amount of air taken in a combustion chamber 19 of an internal combustion engine 1 associated with the acceleration of the vehicle after the acceleration of the vehicle is requested in one combustion cycle based on a lift amount of an intake valve 3. The engine control unit 9 controls a fuel injection valve 5 so as to increase a fuel injection amount in one combustion cycle according to the acceleration intake air amount Qad.Type: ApplicationFiled: June 12, 2017Publication date: June 11, 2020Inventors: Tomoaki HORII, Tei HO, Kazuya SAITO
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Patent number: 10634083Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.Type: GrantFiled: November 20, 2018Date of Patent: April 28, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Ryo Kusakabe, Tomoaki Horii, Shingo Kimura, Takaki Itaya, Mitsuru Nagase, Shirou Yamaoka
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Patent number: 10458354Abstract: Provided is a knock detecting device capable of ensuring knock detection accuracy irrespective of fuel injection conditions even when a period during which injection-valve noise occurs overlaps with a knock determination period. An ECU 9 subjects signals output from a knock sensor, which detects vibrations of an internal combustion engine, to frequency analysis to calculate frequency components (501). The ECU 9 calculates a background level that indicates the average of the frequency components (503). The ECU 9 stores, in association with each other, the number of fuel injections, which indicates the number of fuel injections in a predetermined time period during one combustion cycle, with a learning value, which indicates a frequency-component correction amount (507).Type: GrantFiled: January 29, 2016Date of Patent: October 29, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Tomoaki Horii, Shingo Kimura, Kenji Takada
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Patent number: 10450995Abstract: Provided is a control device for an internal combustion engine, the control device enabling the suppression of variations in the amount of fuel injected by injection while the boost voltage is charging, without offsetting the injection timing. A boost circuit (211) boosts a first voltage supplied from a battery (201), and supplies a boosted second voltage to a fuel injection device (214). Switches (212, 213) switch the second voltage supplied to the fuel injection device from the booster circuit on and off. Computation devices (204, 207) control the switches. Each computation device comprises: an estimation unit that, before the initial fuel injection in a combustion cycle, estimates the second voltage for all of the fuel injection times in the combustion cycle; and a correction unit that corrects the amount of fuel injected for each fuel injection time depending on the estimated second voltage.Type: GrantFiled: January 29, 2016Date of Patent: October 22, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Shingo Kimura, Tomoaki Horii, Mitsuru Nagase, Shirou Yamaoka, Ryo Kusakabe, Takaki Itaya
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Publication number: 20190085783Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.Type: ApplicationFiled: November 20, 2018Publication date: March 21, 2019Applicant: Hitachi Automotive Systems, Ltd.Inventors: Ryo KUSAKABE, Tomoaki HORII, Shingo KIMURA, Takaki ITAYA, Mitsuru NAGASE, Shirou YAMAOKA
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Patent number: 10161339Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.Type: GrantFiled: September 18, 2015Date of Patent: December 25, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Ryo Kusakabe, Tomoaki Horii, Shingo Kimura, Takaki Itaya, Mitsuru Nagase, Shirou Yamaoka
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Publication number: 20180283306Abstract: The objective of the present invention is to correct deviation in the injection amount and changes in the injection timing when the voltage of a high-voltage source for a drive device decreases.Type: ApplicationFiled: September 18, 2015Publication date: October 4, 2018Applicant: Hitachi Automotive Systems, Ltd.Inventors: Ryo KUSAKABE, Tomoaki HORII, Shingo KIMURA, Takaki ITAYA, Mitsuru NAGASE, Shirou YAMAOKA
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Publication number: 20180023503Abstract: Provided is a control device for an internal combustion engine, the control device enabling the suppression of variations in the amount of fuel injected by injection while the boost voltage is charging, without offsetting the injection timing. A boost circuit (211) boosts a first voltage supplied from a battery (201), and supplies a boosted second voltage to a fuel injection device (214). Switches (212, 213) switch the second voltage supplied to the fuel injection device from the booster circuit on and off. Computation devices (204, 207) control the switches. Each computation device comprises: an estimation unit that, before the initial fuel injection in a combustion cycle, estimates the second voltage for all of the fuel injection times in the combustion cycle; and a correction unit that corrects the amount of fuel injected for each fuel injection time depending on the estimated second voltage.Type: ApplicationFiled: January 29, 2016Publication date: January 25, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Shingo KIMURA, Tomoaki HORII, Mitsuru NAGASE, Shirou YAMAOKA, Ryo KUSAKABE, Takaki ITAYA
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Publication number: 20180017004Abstract: Provided is a knock detecting device capable of ensuring knock detection accuracy irrespective of fuel injection conditions even when a period during which injection-valve noise occurs overlaps with a knock determination period. An ECU 9 subjects signals output from a knock sensor, which detects vibrations of an internal combustion engine, to frequency analysis to calculate frequency components (501). The ECU 9 calculates a background level that indicates the average of the frequency components (503). The ECU 9 stores, in association with each other, the number of fuel injections, which indicates the number of fuel injections in a predetermined time period during one combustion cycle, with a learning value, which indicates a frequency-component correction amount (507).Type: ApplicationFiled: January 29, 2016Publication date: January 18, 2018Applicant: Hitachi Automotive Systems, Ltd.Inventors: Tomoaki HORII, Shingo KIMURA, Kenji TAKADA