Patents by Inventor Hidehiko Sugita
Hidehiko Sugita 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: 20230032865Abstract: A vehicle park lock control method is presented with range positions including a P-range position and an N-range position in each of which a driving force is prevented from being transmitted to a driving wheel of a vehicle. A park lock mechanism is activated when in the P-range position. An operator is allowed to select whether or not to cause the park lock mechanism to be activated in response to key-off operation when in the N-range position. In response to continuous shifting of a range selector to one or more specific ones of the range positions, the park lock mechanism is prevented from being activated in response to key-off operation when in the N-range position.Type: ApplicationFiled: December 26, 2019Publication date: February 2, 2023Applicant: NISSAN MOTOR CO., LTD.Inventors: Kenji KOSHIBA, Hidehiko SUGITA, Yasuhiro KONISHI
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Patent number: 9030136Abstract: A motor controlling apparatus including an inverter, a voltage detector, a rotational speed detector, a command value calculating component, an inverter controller, a state detector and an offsetting component. The inverter converts direct-current power to alternating-current power supplied to a motor. The voltage detector detects a direct-current voltage, and the rotational speed detector detects a rotational speed of the motor. The calculating component calculates current and torque command values, and motor rotational speed. The controller provides a control signal to control the inverter based on the current command value. The state detector detects a control state of the inverter, and the offsetting component offsets the detected voltage or rotational speed by an offset amount. The calculating component modifies the current command value based on the offset detected voltage or rotational speed to increase on a negative side a d-axis current command value included in the current command value.Type: GrantFiled: September 7, 2011Date of Patent: May 12, 2015Assignee: Nissan Motor Co., Ltd.Inventors: Hidehiko Sugita, Ken Ito
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Publication number: 20130141023Abstract: A motor controlling apparatus including an inverter, a voltage detector, a rotational speed detector, a command value calculating component, an inverter controller, a state detector and an offsetting component. The inverter converts direct-current power to alternating-current power supplied to a motor. The voltage detector detects a direct-current voltage, and the rotational speed detector detects a rotational speed of the motor. The calculating component calculates current and torque command values, and motor rotational speed. The controller provides a control signal to control the inverter based on the current command value. The state detector detects a control state of the inverter, and the offsetting component offsets the detected voltage or rotational speed by an offset amount. The calculating component modifies the current command value based on the offset detected voltage or rotational speed to increase on a negative side a d-axis current command value included in the current command value.Type: ApplicationFiled: September 7, 2011Publication date: June 6, 2013Applicant: NISSAN MOTOR CO., LTD.Inventors: Hidehiko Sugita, Ken Ito
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Patent number: 7729842Abstract: A vehicle includes an internal combustion engine that drives a first set of wheels, a generator, wherein the generator is powered by the internal combustion engine, a inverter connected to an output of the generator, an AC motor connected to an output of the inverter, and a controller, wherein the controller controls the generator, the inverter and the AC motor. The AC motor drives a second set of wheels. Power output by the generator is controlled according to a desired torque output for the second set of wheels. The controller calculates a potential power based upon the current status of the generator and controls the AC motor by the inverter based on the smaller of the desired torque and the potential power output of the generator.Type: GrantFiled: April 12, 2006Date of Patent: June 1, 2010Assignee: Nissan Motor Co., Ltd.Inventor: Hidehiko Sugita
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Patent number: 7531974Abstract: A motor control device is disclosed that reduces the shock caused by torque increase during switching output of a motor's power generator from PWM wave voltage driving to square-wave voltage driving. Switching of PWM wave voltage driving and square-wave voltage driving is determined based on rotation speed of the motor and a torque instruction value. When switching from PWM wave voltage driving to square-wave voltage driving occurs, the voltage output of the power generator is reduced. When generated voltage V drops below a specified threshold voltage, PWM wave voltage driving is switched to square-wave driving.Type: GrantFiled: December 14, 2005Date of Patent: May 12, 2009Assignee: Nissan Motor Co., Ltd.Inventors: Hideaki Ohtsuka, Hidehiko Sugita
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Patent number: 7495411Abstract: An object of the present invention is to provide a controller for an electric four-wheel-drive vehicle, which is capable of minimizing torque changes and consuming excessive power even when the excessive power is generated by a generator. A motor control unit causes an AC motor to generate desired torque by controlling an inverter. When the power generated by the generator exceeds the power consumed by the inverter and AC motor to generate excessive power, a current command determination unit in the motor control unit consumes the excessive power by increasing a loss in the AC motor.Type: GrantFiled: January 24, 2007Date of Patent: February 24, 2009Assignees: Hitachi, Ltd., Nissan Motor Co., Ltd.Inventors: Satoru Kaneko, Shiho Izumi, Tatsuyuki Yamamoto, Kenta Katsuhama, Shigeru Akaishi, Yasuo Matsunaga, Hidehiko Sugita
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Publication number: 20080297087Abstract: A motor control device is disclosed that reduces the shock caused by torque increase during switching output of a motor's power generator from PWM wave voltage driving to square-wave voltage driving. Switching of PWM wave voltage driving and square-wave voltage driving is determined based on rotation speed of the motor and a torque instruction value. When switching from PWM wave voltage driving to square-wave voltage driving occurs, the voltage output of the power generator is reduced. When generated voltage V drops below a specified threshold voltage, PWM wave voltage driving is switched to square-wave driving.Type: ApplicationFiled: December 14, 2005Publication date: December 4, 2008Applicant: NISSAN MOTOR CO., LTDInventors: Hideaki Ohtsuka, Hidehiko Sugita
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Patent number: 7441616Abstract: A generated power control system in which the magnetic field of a generator is controlled based on a target generated power so as to perform the appropriate generation control. Preferably, the generated power control system is used in a hybrid vehicle having a generator configured to be driven by an internal combustion engine that drives a first wheel and an AC motor that drives a second wheel not driven by the internal combustion engine with an inverter arranged to supply generated power from the generator to the AC motor. Basically, the generated power control basically calculates an AC motor power requirement of the AC motor and a target generated power to be generated by the generator based on the AC motor power requirement, and then controls the generated power generated by the generator by controlling a magnetic field of the generator based on the target generated power calculated.Type: GrantFiled: December 5, 2005Date of Patent: October 28, 2008Assignee: Nissan Motor Co., Ltd.Inventors: Hidehiko Sugita, Hideki Kawashima, Toshirou Matsuda, Yasuki Ishikawa
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Publication number: 20070200529Abstract: An object of the present invention is to provide a controller for an electric four-wheel-drive vehicle, which is capable of minimizing torque changes and consuming excessive power even when the excessive power is generated by a generator. A motor control unit causes an AC motor to generate desired torque by controlling an inverter. When the power generated by the generator exceeds the power consumed by the inverter and AC motor to generate excessive power, a current command determination unit in the motor control unit consumes the excessive power by increasing a loss in the AC motor.Type: ApplicationFiled: January 24, 2007Publication date: August 30, 2007Applicants: Hitachi, Ltd., Nissan Motor Co., Ltd.Inventors: Satoru Kaneko, Shiho Izumi, Tatsuyuki Yamamoto, Kenta Katsuhama, Shigeru Akaishi, Yasuo Matsunaga, Hidehiko Sugita
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Publication number: 20060276941Abstract: A vehicle includes an internal combustion engine that drives a first set of wheels, a generator, wherein the generator is powered by the internal combustion engine, a inverter connected to an output of the generator, an AC motor connected to an output of the inverter, and a controller, wherein the controller controls the generator, the inverter and the AC motor. The AC motor drives a second set of wheels. Power output by the generator is controlled according to a desired torque output for the second set of wheels. The controller calculates a potential power based upon the current status of the generator and controls the AC motor by the inverter based on the smaller of the desired torque and the potential power output of the generator.Type: ApplicationFiled: April 12, 2006Publication date: December 7, 2006Applicant: Nissan Motor Co., Ltd.Inventor: Hidehiko Sugita
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Publication number: 20060138995Abstract: A generated power control system in which the magnetic field of a generator is controlled based on a target generated power so as to perform the appropriate generation control. Preferably, the generated power control system is used in a hybrid vehicle having a generator configured to be driven by an internal combustion engine that drives a first wheel and an AC motor that drives a second wheel not driven by the internal combustion engine with an inverter arranged to supply generated power from the generator to the AC motor. Basically, the generated power control basically calculates an AC motor power requirement of the AC motor and a target generated power to be generated by the generator based on the AC motor power requirement, and then controls the generated power generated by the generator by controlling a magnetic field of the generator based on the target generated power calculated.Type: ApplicationFiled: December 5, 2005Publication date: June 29, 2006Applicant: Nissan Motor Co., Ltd.Inventors: Hidehiko Sugita, Hideki Kawashima, Toshirou Matsuda, Yasuki Ishikawa