Patents by Inventor Hiroaki Horii
Hiroaki Horii 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: 7042179Abstract: An electric power steering apparatus using a brushless motor is disclosed. The electric power steering apparatus has a microcomputer for calculating a target current to the brushless motor on the basis of a torque signal outputted from a steering torque detecting part. The microcomputer has a table stored in ROM. The microcomputer calculates the angular position of the brushless motor by referring to the table on the basis of a signal outputted by a resolver.Type: GrantFiled: February 16, 2005Date of Patent: May 9, 2006Assignee: Honda Motor Co., Ltd.Inventors: Yoshinobu Mukai, Yasuhiro Nakano, Masanori Takagi, Hiroaki Horii, Osamu Tsurumiya, Fumihiro Morishita, Takashi Kuribayashi
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Patent number: 7014008Abstract: A motor driving method for a steering apparatus for applying an auxiliary steering force to a steering system with two motors. When the two motors are driven, a first one of the two motors is operated first. Thereafter, the other, second motor is driven, whereby smooth steering is effected.Type: GrantFiled: June 24, 2003Date of Patent: March 21, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Furumi, Osamu Tsurumiya, Kazuhiko Inaba, Hisao Asaumi, Yoshio Kakizaki, Hirokazu Kitazawa, Tomoaki Sugano, Shinji Suto, Hiroaki Horii, Fumihiro Morishita, Junichi Yoshida
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Patent number: 6971473Abstract: Steering apparatus for transmitting a driving force of a motor through a gear mechanism to a rack shaft of a steering system and applying the driving force to steering road wheels in a steering direction. The apparatus has first and second motors. In the transmission of driving forces from output shafts of the first and second motors to the rack shaft, the phases of the two motors are essentially staggered by 180 degree.Type: GrantFiled: November 24, 2004Date of Patent: December 6, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Furumi, Osamu Tsurumiya, Kazuhiko Inaba, Hisao Asaumi, Yoshio Kakizaki, Hirokazu Kitazawa, Tomoaki Sugano, Shinji Suto, Hiroaki Horii, Fumihiro Morishita, Junichi Yoshida
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Publication number: 20050231145Abstract: An electric power steering apparatus using a brushless motor is disclosed. The electric power steering apparatus has a microcomputer for calculating a target current to the brushless motor on the basis of a torque signal outputted from a steering torque detecting part. The microcomputer has a table stored in ROM. The microcomputer calculates the angular position of the brushless motor by referring to the table on the basis of a signal outputted by a resolver.Type: ApplicationFiled: February 16, 2005Publication date: October 20, 2005Applicant: HONDA MOTOR CO., LTD.Inventors: Yoshinobu Mukai, Yasuhiro Nakano, Masanori Takagi, Hiroaki Horii, Osamu Tsurumiya, Fumihiro Morishita, Takashi Kuribayashi
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Patent number: 6929090Abstract: An electric power steering apparatus with a plurality of motors for applying a force to steering road wheels in a steering direction with mechanism which applies an increase in allocation of auxiliary steering force to an operating motor when at least one of the motors has failed.Type: GrantFiled: November 24, 2004Date of Patent: August 16, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Furumi, Osamu Tsurumiya, Kazuhiko Inaba, Hisao Asaumi, Yoshio Kakizaki, Hirokazu Kitazawa, Tomoaki Sugano, Shinji Suto, Hiroaki Horii, Fumihiro Morishita, Junichi Yoshida
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Publication number: 20050099160Abstract: An apparatus for supplying power for a vehicle includes a first battery, a second battery, a switching device, a monitoring device and a control device. The first battery is electrically connected to load devices which are mounted on the vehicle. The second battery serves as a backup power source. The switching device switches the first and second batteries. The monitoring device monitors remaining capacity for each of the first and second batteries. When the control device determines that the remaining capacity of the second battery is less than the remaining capacity of the first battery based on information monitored by the monitoring device, the control device controls the switching device so as to conduct switching of the first and second batteries.Type: ApplicationFiled: October 14, 2004Publication date: May 12, 2005Applicant: HONDA MOTOR CO., LTD.Inventors: Hisao Asaumi, Hiroaki Horii
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Publication number: 20050093489Abstract: A motor driving method for a steering apparatus for applying an auxiliary steering force to a steering system with two motors. When the two motors are driven, a first one of the two motors is operated first. Thereafter, the other, second motor is driven, whereby smooth steering is effected.Type: ApplicationFiled: November 24, 2004Publication date: May 5, 2005Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Furumi, Osamu Tsurumiya, Kazuhiko Inaba, Hisao Asaumi, Yoshio Kakizaki, Hirokazu Kitazawa, Tomoaki Sugano, Shinji Suto, Hiroaki Horii, Fumihiro Morishita, Junichi Yoshida
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Publication number: 20050087390Abstract: A motor driving method for a steering apparatus for applying an auxiliary steering force to a steering system with two motors. When the two motors are driven, a first one of the two motors is operated first. Thereafter, the other, second motor is driven, whereby smooth steering is effected.Type: ApplicationFiled: November 24, 2004Publication date: April 28, 2005Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Furumi, Osamu Tsurumiya, Kazuhiko Inaba, Hisao Asaumi, Yoshio Kakizaki, Hirokazu Kitazawa, Tomoaki Sugano, Shinji Suto, Hiroaki Horii, Fumihiro Morishita, Junichi Yoshida
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Patent number: 6874595Abstract: An electric power steering apparatus is provided, which includes a steering torque sensor for detecting steering torque exerted on a steering system, a motor for exerting assist steering torque on the steering system, a motor current sensor for detecting drive current of the motor, a target current setting section for determining target current to be supplied for the motor based on the steering torque, a feedback control section for executing feedback control based on a deviation between the target current and the drive current of motor and a feedforward control section for executing feedforward control based on the target current. The apparatus has a feature that gain of the feedforward control is adapted to be greater as the speed of a vehicle increases.Type: GrantFiled: August 27, 2003Date of Patent: April 5, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yoshinobu Mukai, Kyoji Hamamoto, Hiroaki Horii, Kazuhisa Watanabe
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Publication number: 20050065685Abstract: A control apparatus for an electric power steering system is provided, which controls a motor for applying assist steering torque to a steering line of a vehicle at least according to steering torque signal of the steering line, vehicle velocity signal and motor current signal. The control apparatus includes a target current controller for setting target current signal for driving the motor, a deviation calculator for computing a deviation between the target current and motor current signals, a deviation adjuster for adjusting the deviation with a variable gain according to the vehicle velocity signal, a proportional element for executing proportional control for the motor, an integral element for executing integral control for the motor and an gain adjuster for adjusting the gain according to a differential of the steering torque signal.Type: ApplicationFiled: October 9, 2003Publication date: March 24, 2005Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Kyoji Hamamoto, Yoshinobu Mukai, Osamu Tsurumiya, Hiroaki Horii, Kazuhisa Watanabe
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Publication number: 20050024013Abstract: A battery load power detecting system includes a generator current sensor which detects a current supplied from a generator to at least one of a battery and a load group including a steering device, and first and second load current sensors which detect a current supplied from at least one of the generator and the battery to the load group. A battery state monitor calculates a load power of the battery by multiplying a difference between both the currents by a voltage at a terminal of the battery detected by a voltage sensor. Therefore, the load state of the battery can be appropriately confirmed to avoid a situation where the steering device, e.g., a steering-by-wire type steering device, falls into an inoperable state due to power deficiency.Type: ApplicationFiled: June 25, 2004Publication date: February 3, 2005Applicant: Honda Motor Co., Ltd.Inventors: Hisao Asaumi, Hiroaki Horii
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Publication number: 20040083822Abstract: An electric power steering apparatus is provided, which includes a steering torque sensor for detecting steering torque exerted on a steering system, a motor for exerting assist steering torque on the steering system, a motor current sensor for detecting drive current of the motor, a target current setting section for determining target current to be supplied for the motor based on the steering torque, a feedback control section for executing feedback control based on a deviation between the target current and the drive current of motor and a feedforward control section for executing feedforward control based on the target current. The apparatus has a feature that gain of the feedforward control is adapted to be greater as the speed of a vehicle increases.Type: ApplicationFiled: August 27, 2003Publication date: May 6, 2004Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Yoshinobu Mukai, Kyoji Hamamoto, Hiroaki Horii, Kazuhisa Watanabe
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Publication number: 20040080295Abstract: Steering apparatus includes at least one motor for generating a steering assisting force in a direction to steer a steerable wheel, two drive circuits having respective switching elements for PWM-controlling the motor, and a controller for differentiating, between the drive circuits, a control frequency at which the switching element is switched on and off. The differentiated PWM switching timing can effectively reduce switching noise and magnetostrictive sound of the motor.Type: ApplicationFiled: October 22, 2003Publication date: April 29, 2004Applicant: HONDA MOTOR CO., LTD.Inventors: Hisao Asaumi, Osamu Tsurumiya, Hirokazu Kitazawa, Shinji Suto, Junichi Yoshida, Tomoaki Sugano, Fumihiro Morishita, Hiroaki Horii
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Publication number: 20040073345Abstract: An electric power steering control device includes a memory. The memory is accommodated in the electric power steering control device mounted on a vehicle, and permits rewrite and storage of data. Transmitting a signal from an external of the vehicle allows the data stored in the memory to be rewritten.Type: ApplicationFiled: August 27, 2003Publication date: April 15, 2004Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Yoshinobu Mukai, Kyoji Hamamoto, Hiroaki Horii, Kazuhisa Watanabe
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Publication number: 20040007416Abstract: A motor driving method for a steering apparatus for applying an auxiliary steering force to a steering system with two motors. When the two motors are driven, a first one of the two motors is operated first. Thereafter, the other, second motor is driven, whereby smooth steering is effected.Type: ApplicationFiled: June 24, 2003Publication date: January 15, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroshi Furumi, Osamu Tsurumiya, Kazuhiko Inaba, Hisao Asaumi, Yoshio Kakizaki, Hirokazu Kitazawa, Tomoaki Sugano, Shinji Suto, Hiroaki Horii, Fumihiro Morishita, Junichi Yoshida