Patents by Inventor Masahiko Kurishige
Masahiko Kurishige 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: 9249770Abstract: The engine starter includes: a starter motor; a pinion unit (30) for sliding in an axial direction on an output shaft of the starter motor; and a ring gear (100) which meshes with a pinion pushed out by a push-out mechanism (60) and receives a transmission of a rotational force of the starter motor to thereby start an engine, and the pinion portion (30) includes a pinion gear divided in the axial direction into two pinion gears which are a first pinion gear (35) having a protruded shape for synchronization, for first colliding with the ring gear upon start of meshing with the ring gear, and a second pinion gear (34) for serving to transmit the rotational force after the meshing.Type: GrantFiled: July 27, 2011Date of Patent: February 2, 2016Assignee: Mitsubishi Electric CorporationInventors: Daisuke Mizuno, Haruhiko Shimoji, Koichiro Kamei, Masami Abe, Kazuhiro Odahara, Masahiko Kurishige, Hiroaki Kitano, Yuhei Tsukahara, Masahiro Iezawa
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Patent number: 9243599Abstract: Provided is an engine starting device enabling the meshing engagement of a pinion gear and a ring gear to be quickly and quietly achieved in an automatic idle-stop system while an engine is rotating by inertia. The engine starting device includes: a ring gear connected to a crankshaft of an engine; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear moving portion for moving the pinion gear so as to achieve meshing engagement with the ring gear; and starter control portion for executing any one of a plurality of control modes.Type: GrantFiled: October 22, 2010Date of Patent: January 26, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroaki Kitano, Masahiko Kurishige, Koichiro Kamei, Kazuhiro Odahara, Naohito Kaneda
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Patent number: 9242670Abstract: In a steering control device, a road surface reaction force torque calculation module (52) uses a vehicle speed, steering angle, and vehicle model to calculate a caster-trail-caused torque, a self-aligning torque, and a road surface reaction force torque. A reaction force command current calculation module (53) uses the road surface reaction force torque and the vehicle speed to calculate a reaction force command current.Type: GrantFiled: February 19, 2010Date of Patent: January 26, 2016Assignee: Mitsubishi Electric CorporationInventors: Masaya Endo, Masahiko Kurishige, Takayuki Kifuku, Masaki Matsushita, Hideki Doi
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Patent number: 9115683Abstract: A ring gear to be coupled to a crankshaft of an engine; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear meshing-engagement unit for moving the pinion gear to achieve meshing engagement with the ring gear; rpm-difference acquiring unit for acquiring an rpm difference between the pinion gear and the ring gear; and restart control unit for allowing the pinion gear to be moved by the pinion-gear meshing-engagement unit when the rpm difference between the pinion gear and the ring gear, which is acquired by the rpm-difference acquiring unit, becomes smaller than a threshold value are provided. The restart control unit includes threshold-value setting unit, and the threshold value corresponding to a characteristic to be input to the threshold-value setting unit is preset.Type: GrantFiled: October 26, 2010Date of Patent: August 25, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroaki Kitano, Takashi Iwasaki, Masahiko Kurishige, Koichiro Kamei, Kazuhiro Odahara, Naohito Kaneda
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Patent number: 9043090Abstract: An automatic steering apparatus that can suppress steering wheel vibration and that can also smooth angular control. In the automatic steering apparatus, a motor that steers steered wheels is controlled by a control unit. Information from an angle sensor that generates a signal that corresponds to a steering angle of the steered wheels is sent to the control unit. The control unit corrects a target steering angle of the steered wheels such that angular acceleration of the target steering angle is less than or equal to a limiting value. The control unit controls the motor such that the steering angle of the steered wheels tracks the corrected target steering angle based on the information from the angle sensor.Type: GrantFiled: May 18, 2011Date of Patent: May 26, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaya Endo, Masahiko Kurishige, Kenji Ogawa, Takayuki Kifuku, Hiroyuki Kozuki
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Patent number: 8977436Abstract: An electric power steering system includes steering a torque detector that detects steering torque, and a motor that provides assist torque based on the detected steering torque, wherein for the purpose of estimating, without detecting motor rotation angular information and rotation angular velocity information, the road reaction torque in which the influence of the motor inertia torque is eliminated, a value corresponding to rotation velocity of a steering shaft is calculated based on the steering torque and the assist torque, to calculate road reaction torque based on the value corresponding to the rotation velocity of the steering shaft.Type: GrantFiled: July 13, 2011Date of Patent: March 10, 2015Assignee: Mitsubishi Electric CorporationInventors: Masaya Endo, Takashi Iwasaki, Masahiko Kurishige, Takayuki Kifuku, Yoshihiko Kinpara
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Patent number: 8757120Abstract: An engine starting device for an automatic idling stop system includes: a crank angle sensor for detecting a crank angle of an engine; a ring gear connected to a crankshaft of the engine, for transmitting rotation of the engine; ring gear rpm detecting section; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear push-out section for pushing out the pinion gear into meshing engagement with the ring gear; and pinion gear push-out control section for driving the pinion-gear push-out section to bring the pinion gear and the ring gear into meshing engagement when the ring gear rpm detected by the ring gear rotational speed detection section becomes smaller than a threshold value which is determined by at least one of the crank angle, a gear range, and a restart condition.Type: GrantFiled: April 15, 2010Date of Patent: June 24, 2014Assignee: Mitsubishi Electric CorporationInventors: Hiroaki Kitano, Masahiko Kurishige, Daisuke Mizuno, Koichiro Kamei, Shiro Yonezawa, Kazuhiro Odahara, Naohito Kaneda
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Patent number: 8626394Abstract: An electric power steering control device includes: a vibration extracting filter for performing filter processing on a rotation speed of a motor to reduce a gain on a low frequency side so as to output a vibration-component signal; a current variable gain map for detecting a current flowing through the motor as a first state quantity so as to calculate a current variable gain based on the current; a rotation-speed variable gain map for detecting the rotation speed of the motor as a second state quantity so as to calculate a rotation-speed variable gain based on the rotation speed; a correction mechanism calculating a vibration suppression current; and current controller calculating a target current so as to control the current flowing through the motor.Type: GrantFiled: October 21, 2010Date of Patent: January 7, 2014Assignee: Mitsubishi Electric CorporationInventors: Isao Kezobo, Masahiko Kurishige, Masaya Endo, Takayuki Kifuku
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Patent number: 8548684Abstract: To obtain an electric power steering control apparatus hard to generate vibration even when accuracy is not high enough for torque vibration of extremely small output of torque detecting means.Type: GrantFiled: November 4, 2008Date of Patent: October 1, 2013Assignee: Mitsubishi Electric CorporationInventors: Masahiko Kurishige, Takayuki Kifuku, Koji Nagao
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Publication number: 20130233128Abstract: The engine starter includes: a starter motor; a pinion unit (30) for sliding in an axial direction on an output shaft of the starter motor; and a ring gear (100) which meshes with a pinion pushed out by a push-out mechanism (60) and receives a transmission of a rotational force of the starter motor to thereby start an engine, and the pinion portion (30) includes a pinion gear divided in the axial direction into two pinion gears which are a first pinion gear (35) having a protruded shape for synchronization, for first colliding with the ring gear upon start of meshing with the ring gear, and a second pinion gear (34) for serving to transmit the rotational force after the meshing.Type: ApplicationFiled: July 27, 2011Publication date: September 12, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Daisuke Mizuno, Haruhiko Shimoji, Koichiro Kamei, Masami Abe, Kazuhiro Odahara, Masahiko Kurishige, Hiroaki Kitano, Yuhei Tsukahara, Masahiro Iezawa
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Publication number: 20130192419Abstract: An engine starting device includes: a starter motor; a pinion unit coupled to an output-shaft side of the starter motor by a spline, for sliding in an axial direction; and a ring gear which meshes with a pinion gear of the pinion unit pushed out by a push-out mechanism, and receives a transmission of a rotation force of the starter motor, thereby starting an engine. The pinion unit includes, on all teeth on distal end portions in a meshing axial direction of the pinion gear meshing with the ring gear, synchronization surfaces which are a pair of surfaces parallel with the meshing axial direction, and have a thickness thinner than a tooth thickness of the pinion gear.Type: ApplicationFiled: November 24, 2011Publication date: August 1, 2013Applicant: Mitsubishi Electric CorporationInventors: Daisuke Mizuno, Haruhiko Shimoji, Koichiro Kamei, Masami Abe, Masahiko Kurishige, Hiroaki Kitano, Yuhei Tsukahara, Masahiro Iezawa, Kazuhiro Odahara
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Publication number: 20130124049Abstract: An electric power steering system includes steering a torque detector that detects steering torque, and a motor that provides assist torque based on the detected steering torque, wherein for the purpose of estimating, without detecting motor rotation angular information and rotation angular velocity information, the road reaction torque in which the influence of the motor inertia torque is eliminated, a value corresponding to rotation velocity of a steering shaft is calculated based on the steering torque and the assist torque, to calculate road reaction torque based on the value corresponding to the rotation velocity of the steering shaft.Type: ApplicationFiled: July 13, 2011Publication date: May 16, 2013Applicant: Mitsubishi Electric CorporationInventors: Masaya Endo, Takashi Iwasaki, Masahiko Kurishige, Takayuki Kifuku, Yoshihiko Kinpara
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Patent number: 8437915Abstract: To accurately extract a pulsating component generated due to a cogging torque or a torque ripple to reduce a pulsation, the pulsating component is extracted using a bandpass filter having a variable time constant, and the time constant is set according to a frequency of cogging torque or torque ripple to be extracted. Further, a reference angle for a rotation angle of a motor is preset according to a generation harmonic order of the cogging torque or torque ripple, and the time constant of the bandpass filter is set from a time period required for the motor to rotate by the reference angle.Type: GrantFiled: January 30, 2008Date of Patent: May 7, 2013Assignee: Mitsubishi Electric CorporationInventors: Masaya Endo, Masahiko Kurishige, Isao Kezobo
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Publication number: 20130041557Abstract: An automatic steering apparatus that can suppress steering wheel vibration and that can also smooth angular control. In the automatic steering apparatus, a motor that steers steered wheels is controlled by a control unit. Information from an angle sensor that generates a signal that corresponds to a steering angle of the steered wheels is sent to the control unit. The control unit corrects a target steering angle of the steered wheels such that angular acceleration of the target steering angle is less than or equal to a limiting value. The control unit controls the motor such that the steering angle of the steered wheels tracks the corrected target steering angle based on the information from the angle sensor.Type: ApplicationFiled: May 18, 2011Publication date: February 14, 2013Applicant: Mitsubishi Electric CorporationInventors: Masaya Endo, Masahiko Kurishige, Kenji Ogawa, Takayuki Kifuku, Hiroyuki Kozuki
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Patent number: 8346435Abstract: Provided is an electric power steering control device capable of performing damping control without current detection to perform stable damping control even when a target current and an actual current value differ from each other. The electric power steering control device includes steering torque detection means for detecting a steering torque, a torque controller for computing an assist torque current, a motor for generating a torque for assisting the steering torque, rotation speed estimation means for estimating a rotation speed of the motor, and a damping controller for computing a damping current by using an estimated value of the rotation speed of the motor.Type: GrantFiled: October 8, 2008Date of Patent: January 1, 2013Assignee: Mitsubishi Electric CorporationInventors: Masahiko Kurishige, Takayuki Kifuku, Koji Nagao
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Patent number: 8326493Abstract: A motor-driven power steering control apparatus is achieved, which uses a small-amplitude pass filter, the filter filtering out a component having a small amplitude, to remove a steering component from dynamic state quantity such as a rotational speed signal, and to accurately extract only a vibration component having a small amplitude compared with the steering component, and controls the vibration component to be reduced.Type: GrantFiled: December 14, 2007Date of Patent: December 4, 2012Assignee: Mitsubishi Electric CorporationInventors: Isao Kezobo, Masahiko Kurishige, Masaya Endo, Takayuki Kifuku, Seiji Sawada, Masaki Matsushita
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Publication number: 20120296525Abstract: In a steering control device, a road surface reaction force torque calculation module (52) uses a vehicle speed, steering angle, and vehicle model to calculate a caster-trail-caused torque, a self-aligning torque, and a road surface reaction force torque. A reaction force command current calculation module (53) uses the road surface reaction force torque and the vehicle speed to calculate a reaction force command current.Type: ApplicationFiled: February 19, 2010Publication date: November 22, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaya Endo, Masahiko Kurishige, Takayuki Kifuku, Masaki Matsushita, Hideki Doi
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Publication number: 20120260878Abstract: A ring gear to be coupled to a crankshaft of an engine; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear meshing-engagement unit for moving the pinion gear to achieve meshing engagement with the ring gear; rpm-difference acquiring unit for acquiring an rpm difference between the pinion gear and the ring gear; and restart control unit for allowing the pinion gear to be moved by the pinion-gear meshing-engagement unit when the rpm difference between the pinion gear and the ring gear, which is acquired by the rpm-difference acquiring unit, becomes smaller than a threshold value are provided. The restart control unit includes threshold-value setting unit, and the threshold value corresponding to a characteristic to be input to the threshold-value setting unit is preset.Type: ApplicationFiled: October 26, 2010Publication date: October 18, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroaki Kitano, Takashi Iwasaki, Masahiko Kurishige, Koichiro Kamei, Kazuhiro Odahara, Naohito Kaneda
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Patent number: 8290692Abstract: An engine-starting device for stopping the engine after satisfaction of an idling-stop condition during idling of a vehicle, starting rotation of a starter-motor upon satisfaction of a starter-motor rotation start condition, and causing a pinion gear to mesh with a ring gear upon satisfaction of a pinion gear meshing condition, includes the ring gear to be connected to a crank shaft, the pinion gear for transmitting the starter-motor rotation, a plunger for causing the pinion gear to mesh with the ring gear, and a starter control section for instructing energization of the starter-motor, in which the starter-motor is energized to be rotated upon the satisfaction of the starter-motor rotation start condition prior to clearing of the idling-stop condition in response to a restart request, and the pinion gear is caused to mesh with the ring gear by the plunger upon the satisfaction of the pinion gear meshing condition.Type: GrantFiled: September 14, 2009Date of Patent: October 16, 2012Assignee: Mitsubishi Electric CorporationInventors: Hiroaki Kitano, Masahiko Kurishige, Akihiko Imagi, Daisuke Mizuno, Koichiro Kamei, Kazuhiro Odahara, Naohito Kaneda
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Publication number: 20120199090Abstract: Provided is an engine starting device enabling the meshing engagement of a pinion gear and a ring gear to be quickly and quietly achieved in an automatic idle-stop system while an engine is rotating by inertia. The engine starting device includes: a ring gear connected to a crankshaft of an engine; a starter motor for starting the engine; a pinion gear for transmitting rotation of the starter motor to the ring gear; pinion-gear moving portion for moving the pinion gear so as to achieve meshing engagement with the ring gear; and starter control portion for executing any one of a plurality of control modes.Type: ApplicationFiled: October 22, 2010Publication date: August 9, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroaki Kitano, Masahiko Kurishige, Koichiro Kamei, Kazuhiro Odahara, Naohito Kaneda