Patents by Inventor Katsumasa Yoshida
Katsumasa Yoshida 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: 11495857Abstract: A battery mounted on a vehicle, the battery including a battery case having an electrically conductive material and configured to be attached to a body of the vehicle so as to electrically connect to the body of the vehicle. The battery case includes a plus terminal to which an electrical conductor is connected to supply electric power to electrical equipment on-board the vehicle, a minus terminal, a ground member that is attached to the minus terminal so as to electrically connect the minus terminal and the battery case, and a plus terminal cover that covers the plus terminal. In a state where the ground member is attached to the minus terminal, the ground member abuts the plus terminal cover so as to restrict a movement of the plus terminal cover from exposing the plus terminal.Type: GrantFiled: November 13, 2019Date of Patent: November 8, 2022Assignee: MAZDA MOTOR CORPORATIONInventors: Sho Sakagami, Taisuke Hazama, Katsumasa Yoshida
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Patent number: 11431044Abstract: A passive battery cooler for a battery mounted on a vehicle, includes a battery case that accommodates the battery and attaches to a lower side of a floor panel of the vehicle. The battery cooler also includes a fixing bracket that fixes the battery case to the floor panel of the vehicle, wherein the fixing bracket and a bottom surface of the battery case constitute a ventilation passage that extends in a longitudinal direction of the vehicle.Type: GrantFiled: November 13, 2019Date of Patent: August 30, 2022Assignee: MAZDA MOTOR CORPORATIONInventors: Yuichi Tanaka, Sho Sakagami, Taisuke Hazama, Katsumasa Yoshida
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Publication number: 20200168965Abstract: A passive battery cooler for a battery mounted on a vehicle, includes a battery case that accommodates the battery and attaches to a lower side of a floor panel of the vehicle. The battery cooler also includes a fixing bracket that fixes the battery case to the floor panel of the vehicle, wherein the fixing bracket and a bottom surface of the battery case constitute a ventilation passage that extends in a longitudinal direction of the vehicle. [Selected Drawing] FIG.Type: ApplicationFiled: November 13, 2019Publication date: May 28, 2020Applicant: Mazda Motor CorporationInventors: Yuichi TANAKA, Sho SAKAGAMI, Taisuke HAZAMA, Katsumasa YOSHIDA
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Publication number: 20200168866Abstract: A battery mounted on a vehicle, the battery including a battery case having an electrically conductive material and configured to be attached to a body of the vehicle so as to electrically connect to the body of the vehicle. The battery case includes a plus terminal to which an electrical conductor is connected to supply electric power to electrical equipment on-board the vehicle, a minus terminal, a ground member that is attached to the minus terminal so as to electrically connect the minus terminal and the battery case, and a plus terminal cover that covers the plus terminal. In a state where the ground member is attached to the minus terminal, the ground member abuts the plus terminal cover so as to restrict a movement of the plus terminal cover from exposing the plus terminal.Type: ApplicationFiled: November 13, 2019Publication date: May 28, 2020Applicant: Mazda Motor CorporationInventors: Sho SAKAGAMI, Taisuke HAZAMA, Katsumasa YOSHIDA
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Patent number: 9434262Abstract: A power-source apparatus for a vehicle comprises a generator driven by an engine and generating power, a power-storage device storing the power generated by the generator thereat and supplying the power stored thereat to an electric load, and a control device configured to detect a deterioration state of the power-storage device and change a voltage of the power-storage device during a soak in accordance with the deterioration state of the power-storage device detected. Thereby, the improvement of the fuel economy can be achieved and also the necessary durability of the power-storage device can be ensured.Type: GrantFiled: August 8, 2013Date of Patent: September 6, 2016Assignee: Mazda Motor CorporationInventors: Masamitsu Yuhara, Katsumasa Yoshida, Kazuya Kotani
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Patent number: 9254799Abstract: A battery, a regenerative generator, a capacitor capable of storing power generated by the regenerative generator, and a DC/DC convertor capable of allowing an output current to flow up to a specified permissible limit value are provided. The capacitor is connected to a first circuit portion connecting the regenerative generator and the DC/DC convertor. The battery is connected to a second circuit portion connecting the DC/DC convertor and electric loads. Thereby, power from the capacitor is supplied to electric loads by way of the DC/DC convertor until the output current of the DC/DC convertor reaches the specified permissible limit value, whereas power from the battery is supplied to the electric loads after the output current of the DC/DC convertor has reached the specified permissible limit value. A specified electric load is turned OFF when the power from the battery is supplied.Type: GrantFiled: May 9, 2013Date of Patent: February 9, 2016Assignee: Mazda Motor CorporationInventors: Katsumasa Yoshida, Shosuke Morimoto, Kazuya Kotani, Tomoyuki Imamura
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Publication number: 20140067241Abstract: The present invention relates to a power-source apparatus for a vehicle comprising a generator driven by an engine of the vehicle having a function of an idle stop and generating power, a power-storage device storing the power generated by the generator thereat, and a control device. The power-storage device supplies the power to an electric load of the vehicle when the engine is stopped by means of the idle stop. The control device is configured to restart the engine when a voltage of the power-storage device decreases below a lower-limit value after the engine is stopped by means of the idle stop, and stop the engine again when a specified requirement for determining a sufficient recovery of the voltage of the power-storage device by means of the engine's restart is met.Type: ApplicationFiled: August 8, 2013Publication date: March 6, 2014Applicant: MAZDA MOTOR CORPORATIONInventors: Masamitsu YUHARA, Katsumasa YOSHIDA, Kazuya KOTANI
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Publication number: 20140062414Abstract: A power-source apparatus for a vehicle comprises a generator driven by an engine and generating power, a power-storage device storing the power generated by the generator thereat and supplying the power stored thereat to an electric load, and a control device configured to detect a deterioration state of the power-storage device and change a voltage of the power-storage device during a soak in accordance with the deterioration state of the power-storage device detected. Thereby, the improvement of the fuel economy can be achieved and also the necessary durability of the power-storage device can be ensured.Type: ApplicationFiled: August 8, 2013Publication date: March 6, 2014Applicant: MAZDA MOTOR CORPORATIONInventors: Masamitsu YUHARA, Katsumasa YOSHIDA, Kazuya KOTANI
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Publication number: 20130320931Abstract: A battery, a regenerative generator, a capacitor capable of storing power generated by the regenerative generator, and a DC/DC convertor capable of allowing an output current to flow up to a specified permissible limit value are provided. The capacitor is connected to a first circuit portion connecting the regenerative generator and the DC/DC convertor. The battery is connected to a second circuit portion connecting the DC/DC convertor and electric loads. Thereby, power from the capacitor is supplied to electric loads by way of the DC/DC convertor until the output current of the DC/DC convertor reaches the specified permissible limit value, whereas power from the battery is supplied to the electric loads after the output current of the DC/DC convertor has reached the specified permissible limit value. A specified electric load is turned OFF when the power from the battery is supplied.Type: ApplicationFiled: May 9, 2013Publication date: December 5, 2013Applicant: MAZDA MOTOR CORPORATIONInventors: Katsumasa YOSHIDA, Shosuke MORIMOTO, Kazuya KOTANI, Tomoyuki IMAMURA
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Patent number: 8433502Abstract: One example method for an engine having an automatic stopping function in which the engine is automatically stopped when a predetermined engine stopping condition is satisfied, and then the engine is automatically restarted when a predetermined engine restarting condition is satisfied, includes the following: a first step for driving a motor so as to increase an engine rotating speed of the engine up to a predetermined rotating speed and maintain the engine rotating speed, in a case in which a predetermined first condition is satisfied when the engine rotating speed is below the predetermined rotating speed during automatic engine stopping; and a second step for restarting a fuel supply into the engine in a case in which a predetermined second condition is satisfied after the first step is executed.Type: GrantFiled: July 14, 2010Date of Patent: April 30, 2013Assignee: Mazda Motor CorporationInventors: Kunitomo Minamitani, Katsumasa Yoshida, Seiyo Hirano, Akitomo Kume, Hideki Sanai, Kazuya Kotani
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Patent number: 7898245Abstract: A high-precision magnet encoder in which high-order harmonic components can be suppressed without increasing the number of lead wires connecting magnetic field detecting elements to a signal processing circuit. Hall sensors of phase A1, phase B1, phase A2 and phase B2 are arranged sequentially around a permanent magnet 2 at intervals of 90 degrees via an air gap. Hall sensors of phase C1, phase D1, phase C2, phase D2 are arranged at positions 60 degrees away from the Hall sensors of phase A1, phase B1, phase A2 and phase B2, respectively. Connection is made between the positive output terminals of a set of Hall sensors located at positions 60 degrees away from each other and between their negative output terminals.Type: GrantFiled: April 5, 2007Date of Patent: March 1, 2011Assignee: Kabushiki Kaisha Yaskawa DenkiInventors: Yuji Arinaga, Katsumasa Yoshida, Koji Suzuki
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Publication number: 20110029221Abstract: One example method for an engine having an automatic stopping function in which the engine is automatically stopped when a predetermined engine stopping condition is satisfied, and then the engine is automatically restarted when a predetermined engine restarting condition is satisfied, includes the following: a first step for driving a motor so as to increase an engine rotating speed of the engine up to a predetermined rotating speed and maintain the engine rotating speed, in a case in which a predetermined first condition is satisfied when the engine rotating speed is below the predetermined rotating speed during automatic engine stopping; and a second step for restarting a fuel supply into the engine in a case in which a predetermined second condition is satisfied after the first step is executed.Type: ApplicationFiled: July 14, 2010Publication date: February 3, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Kunitomo MINAMITANI, Katsumasa YOSHIDA, Seiyo HIRANO, Akitomo KUME, Hideki SANAI, Kazuya KOTANI
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Publication number: 20090241883Abstract: The invention relates to a control method for an internal combustion engine system, capable of preventing an internal combustion engine in a state after being automatically stopped, from falling into an unrestartable state. Upon satisfaction of a given automatic stop condition, the engine 10 being running is automatically stopped (Step 11). A value of current IEBAT flowing out of a starter battery 520 is compared with a given current value IEBAT—TH, in an automatically stopped state of the engine 10 (Step S30) to diagnosis a discharging status of the starter battery 520. If a result of the diagnosis indicates that the value of current IEBAT flowing out of the starter battery 520 is greater than the given current value IEBAT—TH, it is determined that a post-attached load is detected, and the engine 10 is restarted irrespective of the satisfaction or non-satisfaction of a given restart condition.Type: ApplicationFiled: March 2, 2009Publication date: October 1, 2009Applicant: MAZDA MOTOR COPORATIONInventors: Masahiro Nagoshi, Masayuki Tetsuno, Katsumasa Yoshida
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Publication number: 20090115409Abstract: A high-precision magnet encoder in which high-order harmonic components can be suppressed without increasing the number of lead wires connecting magnetic field detecting elements to a signal processing circuit. Hall sensors of phase A1, phase B1, phase A2 and phase B2 are arranged sequentially around a permanent magnet 2 at intervals of 90 degrees via an air gap. Hall sensors of phase C1, phase D1, phase C2, phase D2 are arranged at positions 60 degrees away from the Hall sensors of phase A1, phase B1, phase A2 and phase B2, respectively. Connection is made between the positive output terminals of a set of Hall sensors located at positions 60 degrees away from each other and between their negative output terminals.Type: ApplicationFiled: April 5, 2007Publication date: May 7, 2009Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yuji Arinaga, Katsumasa Yoshida, Koji Suzuki
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Patent number: 4862044Abstract: A method for adjusting an encoder directly coupled with a brushless motor, wherein a set of sensor match marks are provided on a sensor base plate mounting a number of sensor elements, while another set of disc match marks are provided on an encoder disc at positions where, during the time when the motor is energized but locked, a phase difference between an EMF voltage waveform of the motor and the output voltage waveform of a specific phase of the encoder is made equal to a predetermined value, rough adjustment of the encoder is executed by aligning the two sets of match marks between each other, a gap between the encoder disc and the sensor is adjusted suitably, and then the sensor base plate is slightly rotated relative to the stator of the brushless motor for executing a fine adjustment of the encoder.Type: GrantFiled: March 18, 1988Date of Patent: August 29, 1989Assignee: Kabushiki Kaisha Yaskawa Denki SeisakushoInventors: Kunihiko Karashima, Shoji Kumada, Katsumasa Yoshida, Hiroharu Katase