Patents by Inventor Natsuko Kitamura
Natsuko Kitamura 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: 9316168Abstract: A control device for a fuel pump includes a power storage and a discharger. The fuel pump includes an electromagnetic valve. The power storage is configured to store surge current generated upon stopping supplying electric power to the electromagnetic valve. One end of the power storage is connected to a negative electrode terminal of the electromagnetic valve. Another end of the power storage is connected to a power supply. The discharger is configured to connect the power storage and a positive electrode terminal of the electromagnetic valve upon starting supplying electric power to the electromagnetic valve to discharge an electric charge stored in the power storage.Type: GrantFiled: July 8, 2014Date of Patent: April 19, 2016Assignee: HONDA MOTOR CO., LTD.Inventor: Natsuko Kitamura
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Publication number: 20150040873Abstract: A control device for a fuel pump includes a power storage and a discharger. The fuel pump includes an electromagnetic valve. The power storage is configured to store surge current generated upon stopping supplying electric power to the electromagnetic valve. One end of the power storage is connected to a negative electrode terminal of the electromagnetic valve. Another end of the power storage is connected to a power supply. The discharger is configured to connect the power storage and a positive electrode terminal of the electromagnetic valve upon starting supplying electric power to the electromagnetic valve to discharge an electric charge stored in the power storage.Type: ApplicationFiled: July 8, 2014Publication date: February 12, 2015Applicant: HONDA MOTOR CO., LTD.Inventor: Natsuko KITAMURA
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Patent number: 8905004Abstract: A control apparatus for an internal combustion engine includes a booster, a first controller, and a second controller. The booster is configured to increase an output voltage of a battery to a drive voltage of a fuel injection unit of the internal combustion engine. The first controller has a first initialization time after boot of the first controller. The first controller is configured to control the booster to increase the output voltage to the drive voltage at start-up of the internal combustion engine. The second controller has a second initialization time after boot of the second controller. The second initialization time is longer than the first initialization time of the first controller. The second controller is configured to control the booster to increase the output voltage to the drive voltage after the start-up of the internal combustion engine is completed.Type: GrantFiled: November 21, 2011Date of Patent: December 9, 2014Assignee: Honda Motor Co., Ltd.Inventors: Natsuko Kitamura, Akitsugu Ikeda
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Patent number: 8731856Abstract: A frequency spectrum analyzing apparatus for performing a frequency spectrum analysis with respect to a detected value of an operating parameter of an internal combustion engine in synchronism with rotation of the engine, is provided. The operating parameter is sampled at predetermined time intervals, and the sampled value is converted to a digital value. Intensities of first and second elements are calculated with respect to a predetermined number of the sampled values, wherein the first and second elements respectively correspond to a plurality of frequency components contained in the detected value, and a phase of the second element differs from a phase of the first element by 90 degrees. Frequency component intensities corresponding to the plurality of frequencies are calculated in synchronism with rotation of the engine, using the first element intensities and the second element intensities.Type: GrantFiled: January 27, 2010Date of Patent: May 20, 2014Assignee: Honda Motor Co., Ltd.Inventors: Natsuko Kitamura, Jiro Takagi, Atsushi Kurauchi, Hirotaka Komatsu, Masayuki Yoshiiri
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Patent number: 8725463Abstract: A frequency spectrum analyzing apparatus for performing a frequency spectrum analysis with respect to a detected value of an operating parameter of an internal combustion engine in synchronism with rotation of the engine, is provided. The operating parameter is sampled at predetermined time intervals, and a sampled value is converted to a digital value. Intensities of first and second elements are calculated with respect to a predetermined number of the sampled values. The first elements and second elements respectively correspond to a plurality of frequency components contained in the detected value, and a phase of the second element differs from a phase of the first element by 90 degrees. Frequency component intensities corresponding to the plurality of frequency components are calculated in synchronism with rotation of the engine, using the first element intensities and the second element intensities.Type: GrantFiled: September 9, 2009Date of Patent: May 13, 2014Assignee: Honda Motor Co., Ltd.Inventors: Natsuko Kitamura, Yoshiaki Akimoto, Jiro Takagi, Atsushi Kurauchi, Masayuki Yoshiiri, Hirotaka Komatsu, Kazuhiko Hirota, Makoto Murakami
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Patent number: 8694228Abstract: A fuel injection control for an internal combustion engine includes a coil, a first switch, a capacitor, a second switch, and a control circuit. The coil is to boost a voltage of a power supply source. The first switch is connected at one end to an output side of the coil and at the other end to a ground. The capacitor is connected to an electromagnetic fuel injection valve to store energy which has been stored in the coil. The second switch is connected at one end between the coil and the first switch and at the other end to an input side of the capacitor. The control circuit is connected to the first switch and the second switch. The control circuit is configured to perform synchronous rectifying control for switching the first switch and the second switch.Type: GrantFiled: January 26, 2012Date of Patent: April 8, 2014Assignee: Honda Motor Co., Ltd.Inventors: Natsuko Kitamura, Jun Ishii, Akitsugu Ikeda
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Patent number: 8606489Abstract: An ignition timing control system for an internal combustion engine, for controlling an ignition timing of the engine, is provided. A charging efficiency of the engine is calculated according to the intake air flow rate and the engine rotational speed which are detected, and a knock limit ignition timing is calculated according to the engine rotational speed and the charging efficiency. A knock correction value is calculated according to the knocking detection result by a knock sensor, and a learning parameter table, in which first and second learning parameters are set, is updated based on the engine rotational speed and the knock correction value when the knocking is detected. The learning parameter table is retrieved according to the engine rotational speed, to calculate the first and second learning parameters.Type: GrantFiled: January 28, 2010Date of Patent: December 10, 2013Assignee: Honda Motor Co., Ltd.Inventors: Masayuki Yoshiiri, Jiro Takagi, Hirotaka Komatsu, Kazuhiko Hirota, Atsushi Kurauchi, Natsuko Kitamura
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Patent number: 8326518Abstract: A knocking detecting apparatus for an internal combustion engine, which can more accurately perform the knocking determination based on frequency components of the output signal of the knock sensor, is provided. A frequency spectrum analysis of the knock sensor output signal is performed at predetermined angular intervals of the crankshaft rotation angle. Intensities of a plurality of frequency components obtained by the frequency spectrum analysis are stored as time series data. The time series data of the frequency component intensity are binarized, and it is determined whether or not a knocking has occurred based on the binarized time series data.Type: GrantFiled: March 9, 2009Date of Patent: December 4, 2012Assignee: Honda Motor Co., Ltd.Inventors: Hirotaka Komatsu, Jiro Takagi, Atsushi Kurauchi, Masayuki Yoshiiri, Kazuhiko Hirota, Natsuko Kitamura, Yoshiaki Akimoto
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Publication number: 20120192837Abstract: A fuel injection control for an internal combustion engine includes a coil, a first switch, a capacitor, a second switch, and a control circuit. The coil is to boost a voltage of a power supply source. The first switch is connected at one end to an output side of the coil and at the other end to a ground. The capacitor is connected to an electromagnetic fuel injection valve to store energy which has been stored in the coil. The second switch is connected at one end between the coil and the first switch and at the other end to an input side of the capacitor. The control circuit is connected to the first switch and the second switch. The control circuit is configured to perform synchronous rectifying control for switching the first switch and the second switch.Type: ApplicationFiled: January 26, 2012Publication date: August 2, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Natsuko KITAMURA, Jun Ishii, Akitsugu Ikeda
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Publication number: 20120125296Abstract: A control apparatus for an internal combustion engine includes a booster, a first controller, and a second controller. The booster is configured to increase an output voltage of a battery to a drive voltage of a fuel injection unit of the internal combustion engine. The first controller has a first initialization time after boot of the first controller. The first controller is configured to control the booster to increase the output voltage to the drive voltage at start-up of the internal combustion engine. The second controller has a second initialization time after boot of the second controller. The second initialization time is longer than the first initialization time of the first controller. The second controller is configured to control the booster to increase the output voltage to the drive voltage after the start-up of the internal combustion engine is completed.Type: ApplicationFiled: November 21, 2011Publication date: May 24, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Natsuko KITAMURA, Akitsugu Ikeda
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Publication number: 20110282562Abstract: An ignition timing control system for an internal combustion engine, for controlling an ignition timing of the engine, is provided. A charging efficiency of the engine is calculated according to the intake air flow rate and the engine rotational speed which are detected, and a knock limit ignition timing is calculated according to the engine rotational speed and the charging efficiency. A knock correction value is calculated according to the knocking detection result by a knock sensor, and a learning parameter table, in which first and second learning parameters are set, is updated based on the engine rotational speed and the knock correction value when the knocking is detected. The learning parameter table is retrieved according to the engine rotational speed, to calculate the first and second learning parameters.Type: ApplicationFiled: January 28, 2010Publication date: November 17, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Masayuki Yoshiri, Jiro Takagi, Hirotaka Komatsu, Kazuhiko Hirota, Atsushi Kurauchi, Natsuko Kitamura
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Publication number: 20110276293Abstract: A frequency spectrum analyzing apparatus for performing a frequency spectrum analysis with respect to a detected value of an operating parameter of an internal combustion engine in synchronism with rotation of the engine, is provided. The operating parameter is sampled at predetermined time intervals, and the sampled value is converted to a digital value. Intensities of first and second elements are calculated with respect to a predetermined number of the sampled values, wherein the first and second elements respectively correspond to a plurality of frequency components contained in the detected value, and a phase of the second element differs from a phase of the first element by 90 degrees. Frequency component intensities corresponding to the plurality of frequencies are calculated in synchronism with rotation of the engine, using the first element intensities and the second element intensities.Type: ApplicationFiled: January 27, 2010Publication date: November 10, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Natsuko Kitamura, Jiro Takagi, Atsushi Kurauchi, Hirotaka Komatsu, Masayuki Yoshiiri
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Publication number: 20110178750Abstract: A frequency spectrum analyzing apparatus for performing a frequency spectrum analysis with respect to a detected value of an operating parameter of an internal combustion engine in synchronism with rotation of the engine, is provided. The operating parameter is sampled at predetermined time intervals, and a sampled value is converted to a digital value. Intensities of first and second elements are calculated with respect to a predetermined number of the sampled values. The first elements and second elements respectively correspond to a plurality of frequency components contained in the detected value, and a phase of the second element differs from a phase of the first element by 90 degrees. Frequency component intensities corresponding to the plurality of frequency components are calculated in synchronism with rotation of the engine, using the first element intensities and the second element intensities.Type: ApplicationFiled: September 9, 2009Publication date: July 21, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Natsuko Kitamura, Yoshiaki Akimoto, Jiro Takagi, Atsushi Kurauchi, Masayuki Yoshiiri, Hirotaka Komatsu, Kazuhiko Hirota, Makoto Murakami
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Publication number: 20110118960Abstract: A knocking detecting apparatus for an internal combustion engine, which can more accurately perform the knocking determination based on frequency components of the output signal of the knock sensor, is provided. A frequency spectrum analysis of the knock sensor output signal is performed at predetermined angular intervals of the crankshaft rotation angle. Intensities of a plurality of frequency components obtained by the frequency spectrum analysis are stored as time series data. The time series data of the frequency component intensity are binarized, and it is determined whether or not a knocking has occurred based on the binarized time series data.Type: ApplicationFiled: March 9, 2009Publication date: May 19, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Hirotaka Komatsu, Jiro Takagi, Atsushi Kurauchi, Masayuki Yoshiri, Kazuhiko Hirota, Natsuko Kitamura, Yoshiaki Akimoto