Patents by Inventor Mitsuru Nagase
Mitsuru Nagase 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: 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: 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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Patent number: 8136344Abstract: At the start-up of an engine, the ignition timing and the air-fuel ratio are controlled to prevent overload onto the volume of ISC air and decreased torque and torque difference. The fuel condition based on the amount of ignition timing correction to inhibit rotational fluctuation during idling is determined and the fuel quantity based on the result is corrected. Right after an engine has started and until a pilot burner is created in the heat spot of the catalyst, the ignition retard control is mainly executed, and at the time when it is determined that a pilot burner has been created in the catalyst's heat spot, the lean air-fuel ratio control is to be executed instead of the ignition retard control. Furthermore, when the ignition retard control changes to the lean air-fuel ratio control, the state transition control is executed along the equivalent ISC air volume line so as not to cause torque fluctuation.Type: GrantFiled: November 27, 2007Date of Patent: March 20, 2012Assignee: Hitachi, Ltd.Inventors: Seiji Asano, Hisahiro Ooba, Masahiro Osato, Kenji Takada, Mitsuru Nagase, Hiroshi Sekine
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Patent number: 7761220Abstract: The invention precisely achieves an air fuel ratio control precision in each of operating regions of an engine, particularly a demand air fuel ratio at a time of an engine transition. In a fuel control system correcting a basic fuel amount in such a manner as to estimate a fuel adhered to an air intake pipe of an engine and an evaporated fuel from the adhered fuel so as to achieve a demanded air fuel ratio, a temperature of a fuel adhered portion is estimated on the basis of an amount relation between the fuel to be adhered and the already adhered fuel, or a heat quantity balance. A fuel adhesion amount and a fuel evaporation amount are determined on the basis of the estimated temperature.Type: GrantFiled: April 23, 2008Date of Patent: July 20, 2010Assignee: Hitachi, Ltd.Inventors: Seiji Asano, Mitsuru Nagase, Hiroshi Sekine
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Publication number: 20080270006Abstract: The invention precisely achieves an air fuel ratio control precision in each of operating regions of an engine, particularly a demand air fuel ratio at a time of an engine transition. In a fuel control system correcting a basic fuel amount in such a manner as to estimate a fuel adhered to an air intake pipe of an engine and an evaporated fuel from the adhered fuel so as to achieve a demanded air fuel ratio, a temperature of a fuel adhered portion is estimated on the basis of an amount relation between the fuel to be adhered and the already adhered fuel, or a heat quantity balance. A fuel adhesion amount and a fuel evaporation amount are determined on the basis of the estimated temperature.Type: ApplicationFiled: April 23, 2008Publication date: October 30, 2008Applicant: Hitachi, Ltd.Inventors: Seiji ASANO, Mitsuru NAGASE, Hiroshi SEKINE
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Publication number: 20080133115Abstract: At the start-up of an engine, the ignition timing and the air-fuel ratio are controlled to prevent overload onto the volume of ISC air and decreased torque and torque difference. The fuel condition based on the amount of ignition timing correction to inhibit rotational fluctuation during idling is determined and the fuel quantity based on the result is corrected. Right after an engine has started and until a pilot burner is created in the heat spot of the catalyst, the ignition retard control is mainly executed, and at the time when it is determined that a pilot burner has been created in the catalyst's heat spot, the lean air-fuel ratio control is to be executed instead of the ignition retard control. Furthermore, when the ignition retard control changes to the lean air-fuel ratio control, the state transition control is executed along the equivalent ISC air volume line so as not to cause torque fluctuation.Type: ApplicationFiled: November 27, 2007Publication date: June 5, 2008Applicant: Hitachi, Ltd.Inventors: Seiji Asano, Hisahiro Ooba, Masahiro Osato, Kenji Takada, Mitsuru Nagase, Hiroshi Sekine
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Patent number: 6034500Abstract: A stepping motor control apparatus for controlling a stepping motor to drive a fluid flow control valve in an engine includes an operation state monitoring unit for monitoring the operation state of the engine; a step position monitoring unit for monitoring a step position of the stepping motor; a first motor drive direction-determining unit for determining the motor drive direction during normal operations of the stepping motor as determined by a target step position and the present step position of the stepping motor; a second motor drive direction-determining unit for determining the motor drive direction during anomalous operations of the stepping motor; a drive pulse-rate determining unit for determining the pulse generation rate to drive the stepping motor; and a drive unit for driving the stepping motor at the pulse generation rate determined by the drive pulse-rate determining unit.Type: GrantFiled: April 20, 1999Date of Patent: March 7, 2000Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Mitsuru Nagase, Asahiko Otani, Tomoharu Sasaki