Patents by Inventor Seiichi Kinugasa
Seiichi Kinugasa 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: 8446118Abstract: A rotary electric machine control device includes a positive/negative determination section that determines whether an output torque of the rotary electric machine is positive or negative; a correction parameter setting section that sets as a correction parameter a phase difference of a sinusoidal ripple correction wave for reducing torque ripple of the rotary electric machine with respect to a magnetic pole position of the rotary electric machine depending on whether the output torque is positive or negative; and a correction wave generation section that generates the ripple correction wave on the basis of the correction parameter.Type: GrantFiled: January 22, 2010Date of Patent: May 21, 2013Assignee: Aisin AW Co., Ltd.Inventors: Seiichi Kinugasa, Jin Izawa, Kazuyuki Izawa, Kazuo Aoki
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Patent number: 7928686Abstract: An electric motor control device includes a direct current power source; an inverter interposed between an electric motor and the direct current power source, the inverter device controlling an exchange of electric power therebetween; an inverter control unit that generates PWM pulses having a duty ratio corresponding to voltage command signals and sends the PWM pulses to the inverter in order to switch the inverter; a frequency changing unit that changes a carrier frequency of the PWM pulses generated by the inverter control unit in a manner corresponding to a frequency control signal; and a motor control unit.Type: GrantFiled: October 31, 2008Date of Patent: April 19, 2011Assignee: Aisin AW Co., Ltd.Inventors: Subrata Saha, Isao Fujiwara, Keisuke Nishimura, Kazuma Hasegawa, Yoshinori Oono, Seiichi Kinugasa
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Patent number: 7819768Abstract: A hydraulic control apparatus for a transmission includes a line pressure regulating device that enables control in which an oil pressure from an oil pump is regulated so as to attain a line pressure, and that enables control in which the line pressure is switched stepwise between a low pressure state in a lower pressure range and a high pressure state in a higher pressure range; a plurality of hydraulic servos that engage and disengage friction engaging elements using engagement pressures that are based on the line pressure; and a high pressure state detecting device that detects that the line pressure regulating device is outputting the line pressure in the high pressure state.Type: GrantFiled: January 10, 2007Date of Patent: October 26, 2010Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Seiichi Kinugasa, Kazuhito Enomoto, Kiyotomo Miura, Kazuyuki Noda, Satoru Wakuta, Hiroatsu Endo, Masatoshi Adachi, Masato Fujikawa, Kazuo Kawaguchi
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Publication number: 20100244755Abstract: A rotary electric machine control device includes a positive/negative determination section that determines whether an output torque of the rotary electric machine is positive or negative; a correction parameter setting section that sets as a correction parameter a phase difference of a sinusoidal ripple correction wave for reducing torque ripple of the rotary electric machine with respect to a magnetic pole position of the rotary electric machine depending on whether the output torque is positive or negative; and a correction wave generation section that generates the ripple correction wave on the basis of the correction parameter.Type: ApplicationFiled: January 22, 2010Publication date: September 30, 2010Applicant: AISIN AW CO., LTD.Inventors: Seiichi Kinugasa, Jin Izawa, Kazuyuki Izawa, Kazuo Aoki
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Publication number: 20090115362Abstract: An electric motor control device includes a direct current power source; an inverter interposed between an electric motor and the direct current power source, the inverter device controlling an exchange of electric power therebetween; an inverter control unit that generates PWM pulses having a duty ratio corresponding to voltage command signals and sends the PWM pulses to the inverter in order to switch the inverter; a frequency changing unit that changes a carrier frequency of the PWM pulses generated by the inverter control unit in a manner corresponding to a frequency control signal; and a motor control unit.Type: ApplicationFiled: October 31, 2008Publication date: May 7, 2009Applicant: AISIN AW CO., LTD.Inventors: Subrata Saha, Isao Fujiwara, Keisuke Nishimura, Kazuma Hasegawa, Yoshinori Oono, Seiichi Kinugasa
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Publication number: 20070173373Abstract: A hydraulic control apparatus for a transmission includes a line pressure regulating device that enables control in which an oil pressure from an oil pump is regulated so as to attain a line pressure, and that enables control in which the line pressure is switched stepwise between a low pressure state in a lower pressure range and a high pressure state in a higher pressure range; a plurality of hydraulic servos that engage and disengage friction engaging elements using engagement pressures that are based on the line pressure; and a high pressure state detecting device that detects that the line pressure regulating device is outputting the line pressure in the high pressure state.Type: ApplicationFiled: January 10, 2007Publication date: July 26, 2007Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiichi Kinugasa, Kazuhito Enomoto, Kiyotomo Miura, Kazuyuki Noda, Satoru Wakuta, Hiroatsu Endo, Masatoshi Adachi, Masato Fujikawa, Kazuo Kawaguchi
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Patent number: 7128676Abstract: A failsafe hydraulic circuit designed to avoid simultaneous engagement of two friction engagement elements (e.g., clutches, brakes, etc.) incorporated in a speed change apparatus of a motor vehicle or the like. If a first failsafe valve is in the open position state and a first engaging pressure is supplied to a first hydraulic servo via the first failsafe valve, the first engaging pressure is also input to a first oil pressure switch via a second failsafe valve being in the closed position state. Therefore, using the first oil pressure switch, it can be detected that the first engaging pressure is supplied to the first hydraulic servo. Furthermore, if the first engaging pressure is, for example, greater than the set pressure of the first oil pressure switch, this situation can also be detected. Such detections provide confirmation of normal operation of the first failsafe valve and the second failsafe valve.Type: GrantFiled: October 29, 2004Date of Patent: October 31, 2006Assignees: Aisin AW Co., LTD, Toyota Jidosha Kabushiki KaishaInventors: Seiichi Kinugasa, Masanori Onoda, Kazuhito Enomoto, Kiyotomo Miura, Naoyuki Fukaya, Satoru Wakuta, Masatoshi Adachi, Akira Murakami
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Publication number: 20050137043Abstract: A failsafe hydraulic circuit designed to avoid simultaneous engagement of two friction engagement elements (e.g., clutches, brakes, etc.) incorporated in a speed change apparatus of a motor vehicle or the like. If a first failsafe valve is in the open position state and a first engaging pressure is supplied to a first hydraulic servo via the first failsafe valve, the first engaging pressure is also input to a first oil pressure switch via a second failsafe valve being in the closed position state. Therefore, using the first oil pressure switch, it can be detected that the first engaging pressure is supplied to the first hydraulic servo. Furthermore, if the first engaging pressure is, for example, greater than the set pressure of the first oil pressure switch, this situation can also be detected. Such detections provide confirmation of normal operation of the first failsafe valve and the second failsafe valve.Type: ApplicationFiled: October 29, 2004Publication date: June 23, 2005Inventors: Seiichi Kinugasa, Masanori Onoda, Kazuhito Enomoto, Kiyotomo Miura, Naoyuki Fukaya, Satoru Wakuta, Masatoshi Adachi, Akira Murakami