Patents by Inventor Shinya Aono
Shinya Aono 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: 20140311817Abstract: An EPS includes a first rack and pinion mechanism that converts rotation of a pinion shaft due to a steering operation, to reciprocating motion of a rack shaft; and a steering force assist device that applies a motor torque of a motor as an assist force by using a second rack and pinion mechanism; and an ECU that controls an operation of the steering force assist device. Rack teeth of the rack shaft constituting the first rack and pinion mechanism are formed so that a steering gear ratio is changed depending on a steering angle. The ECU computes a motor neutral point by subtracting a conversion value from a motor angle detection value. The conversion value is computed based on a steering angle detection value by referring to a conversion map that is set taking into account the steering gear ratio corresponding to the steering angle.Type: ApplicationFiled: April 10, 2014Publication date: October 23, 2014Applicant: JTEKT CORPORATIONInventors: Masayuki KITA, Shinya AONO
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Publication number: 20140297123Abstract: An electric power steering apparatus includes a motor for applying assist torque to a vehicle steering mechanism and a controller, which controls driving of the motor to cause the assist torque to follow an assist command value. The controller calculates a basic assist command value based on steering torque applied to the steering mechanism and corrects the basic assist command value using a correction value, thereby setting the assist command value. If the steering torque has an absolute value greater than a threshold value when the vehicle is in a straight-line traveling state, the controller sets the correction value such that the absolute value of the steering torque is reduced. If the steering torque has an absolute value less than the threshold value when the vehicle is in a straight-line traveling state, the controller sets the correction value such that the absolute value of the assist command value is reduced.Type: ApplicationFiled: March 25, 2014Publication date: October 2, 2014Inventors: Tetsuya NOZAWA, Shinya AONO, Takayuki OHTA, Tomohiko USUI, Yuuichi FUKUYAMA, Takashi SEKIGUCHI
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Patent number: 8833765Abstract: A paper sheet conveying apparatus includes: a conveying path in which a paper sheet is conveyed; a plurality of conveying rollers; a plurality of driving motors; an out-of-step detection portion; a stop control portion; and a driving restart control portion. The plurality of conveying rollers are disposed along the conveying path. The plurality of driving motors rotates the conveying rollers. The out-of-step detection portion detects an out-of-step in each of the driving motors. The stop control portion stops each of the driving motors when an out-of-step is detected. The driving restart control portion drives, after each of the driving motors is stopped, a first driving motor in which an out-of-step has occurred, and a second driving motor in which no out-of-step occurs, under a driving start condition that an amount of rotation of the second driving motor is less than an amount of rotation of the first driving motor.Type: GrantFiled: October 14, 2013Date of Patent: September 16, 2014Assignee: Kyocera Document Solutions, Inc.Inventor: Shinya Aono
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Patent number: 8738229Abstract: A current command value computing section includes an integration control computing section. Based on an integration of the steering torque ?, the integration control computing section computes a steering torque integration control amount Iint*, which is a compensation component for increasing the assist force. The integration control computing section functions as a determining device that determines whether the vehicle is traveling forward in a straight line. When the determining device determines that the vehicle is traveling forward in a straight line, the integration control computing section outputs the steering torque integration control amount Iint* to an adder. The current command value computing section superimposes the steering torque integration control amount Iint* on a basic assist control amount Ias* computed by a basic assist control section, and outputs the obtained value, as a current command value Iq* corresponding to a target assist force, to an output section.Type: GrantFiled: April 15, 2009Date of Patent: May 27, 2014Assignee: JTEKT CorporationInventors: Terutaka Tamaizumi, Hirozumi Eki, Shinya Aono, Jun Hasegawa, Masayuki Kita
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Publication number: 20140117610Abstract: A paper sheet conveying apparatus includes: a conveying path in which a paper sheet is conveyed; a plurality of conveying rollers; a plurality of driving motors; an out-of-step detection portion; a stop control portion; and a driving restart control portion. The plurality of conveying rollers are disposed along the conveying path. The plurality of driving motors rotates the conveying rollers. The out-of-step detection portion detects an out-of-step in each of the driving motors. The stop control portion stops each of the driving motors when an out-of-step is detected. The driving restart control portion drives, after each of the driving motors is stopped, a first driving motor in which an out-of-step has occurred, and a second driving motor in which no out-of-step occurs, under a driving start condition that an amount of rotation of the second driving motor is less than an amount of rotation of the first driving motor.Type: ApplicationFiled: October 14, 2013Publication date: May 1, 2014Applicant: KYOCERA Document Solutions Inc.Inventor: Shinya Aono
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Patent number: 8560174Abstract: A steering torque shift control amount calculation unit (31) calculates the steering torque shift control amount (?ts) by multiplying the basic shift amount (?ts_b) used as the basic compensation component by the transition coefficient (Kss). Then, the steering torque shift control amount (?ts) is subjected to the low-pass filter process in an abrupt change prevention processing unit (32). An abrupt change prevention processing unit (40) is provided in the steering torque shift control amount calculation unit (31). The transition coefficient (Kss) is subjected to the low-pass filter process in the abrupt change prevention processing unit (40). The cutoff frequency of the low-pass filter that forms the abrupt change prevention processing unit (40) is set to a value lower than the cutoff frequency of the low-pass filter that forms the abrupt change prevention processing unit (32) that executes the low-pass filter process on the torque shift control amount (?ts).Type: GrantFiled: June 18, 2010Date of Patent: October 15, 2013Assignee: JTEKT CorporationInventors: Akihiko Nishimura, Terutaka Tamaizumi, Masayuki Kita, Shinya Aono, Jun Hasegawa, Akira Nambu
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Patent number: 8082080Abstract: An electric power steering (EPS) apparatus 1 includes a motor 12, an EPS actuator 10, a torque sensor 14, and an ECU 11. The EPS actuator 10 uses the motor 12 as a drive source to apply assist force to a steering system, thereby assisting a steering operation. The torque sensor 14 detects a steering torque ? of the steering system. The ECU 11 controls the operation of the EPS actuator 10. Based on the steering torque ? detected by the torque sensor 14, the ECU 11 computes a basic shift amount ?ts_b of the assist force applied to the steering system. The ECU 11 determines which one of returning, holding, and turning is the state of the steering operation. When the state of the steering operation is returning or holding, the ECU 11 executes compensation control for correcting the steering torque ?, which is used in the computation of the basic shift amount ?ts_b of the assist force, thereby increasing the assist force applied to the steering system.Type: GrantFiled: June 2, 2009Date of Patent: December 20, 2011Assignee: JTEKT CorporationInventors: Masayuki Kita, Terutaka Tamaizumi, Akihiko Nishimura, Shinya Aono, Jun Hasegawa, Akira Nambu
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Publication number: 20110022270Abstract: A current command value computing section includes an integration control computing section. Based on an integration of the steering torque ?, the integration control computing section computes a steering torque integration control amount Iint*, which is a compensation component for increasing the assist force. The integration control computing section functions as a determining device that determines whether the vehicle is traveling forward in a straight line. When the determining device determines that the vehicle is traveling forward in a straight line, the integration control computing section outputs the steering torque integration control amount Iint* to an adder. The current command value computing section superimposes the steering torque integration control amount Iint* on a basic assist control amount Ias* computed by a basic assist control section, and outputs the obtained value, as a current command value Iq* corresponding to a target assist force, to an output section.Type: ApplicationFiled: April 15, 2009Publication date: January 27, 2011Applicant: JTEKT CORPORATIONInventors: Terutaka Tamaizumi, Hirozumi Eki, Shinya Aono, Jun Hasegawa, Masayuki Kita
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Publication number: 20100324783Abstract: A steering torque shift control amount calculation unit (31) calculates the steering torque shift control amount (?ts) by multiplying the basic shift amount (?ts_b) used as the basic compensation component by the transition coefficient (Kss). Then, the steering torque shift control amount (?ts) is subjected to the low-pass filter process in an abrupt change prevention processing unit (32). An abrupt change prevention processing unit (40) is provided in the steering torque shift control amount calculation unit (31). The transition coefficient (Kss) is subjected to the low-pass filter process in the abrupt change prevention processing unit (40). The cutoff frequency of the low-pass filter that forms the abrupt change prevention processing unit (40) is set to a value lower than the cutoff frequency of the low-pass filter that forms the abrupt change prevention processing unit (32) that executes the low-pass filter process on the torque shift control amount (?ts).Type: ApplicationFiled: June 18, 2010Publication date: December 23, 2010Applicant: JTEKT CORPORATIONInventors: Akihiko NISHIMURA, Terutaka Tamaizumi, Masayuki Kita, Shinya Aono, Jun Hasegawa, Akira Nambu
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Patent number: 7826950Abstract: In an electric power steering apparatus, steering torque of a steering wheel is detected by a torque sensor, and a motor 10 for generating steering assist power is controlled so that the steering assist power is generated according to a basic assist torque corresponding to the detected steering torque. A correspondence relationship between the steering torque and the basic assist torque is set such that an assist gradient that is a rate of change of the basic assist torque to the steering torque varies according to variation of the steering torque. A correction amount of an output of the motor 10 varies according to the variation of the assist gradient.Type: GrantFiled: November 8, 2005Date of Patent: November 2, 2010Assignee: JTEKT CorporationInventors: Terutaka Tamaizumi, Shinya Aono
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Publication number: 20090299575Abstract: An electric power steering (EPS) apparatus 1 includes a motor 12, an EPS actuator 10, a torque sensor 14, and an ECU 11. The EPS actuator 10 uses the motor 12 as a drive source to apply assist force to a steering system, thereby assisting a steering operation. The torque sensor 14 detects a steering torque ? of the steering system. The ECU 11 controls the operation of the EPS actuator 10. Based on the steering torque ? detected by the torque sensor 14, the ECU 11 computes a basic shift amount ?ts_b of the assist force applied to the steering system. The ECU 11 determines which one of returning, holding, and turning is the state of the steering operation. When the state of the steering operation is returning or holding, the ECU 11 executes compensation control for correcting the steering torque ?, which is used in the computation of the basic shift amount ?ts_b of the assist force, thereby increasing the assist force applied to the steering system.Type: ApplicationFiled: June 2, 2009Publication date: December 3, 2009Applicant: JTEKT CorporationInventors: Masayuki KITA, Terutaka Tamaizumi, Akihiko Nishimura, Shinya Aono, Jun Hasegawa, Akira Nambu
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Publication number: 20080033613Abstract: In an electric power steering apparatus, steering torque of a steering wheel is detected by a torque sensor, and a motor 10 for generating steering assist power is controlled so that the steering assist power is generated according to a basic assist torque corresponding to the detected steering torque. A correspondence relationship between the steering torque and the basic assist torque is set such that an assist gradient that is a rate of change of the basic assist torque to the steering torque varies according to variation of the steering torque. A correction amount of an output of the motor 10 varies according to the variation of the assist gradient.Type: ApplicationFiled: November 8, 2005Publication date: February 7, 2008Applicant: JTEKT CorporationInventors: Terutaka Tamaizumi, Shinya Aono
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Patent number: 7136732Abstract: An electric power steering apparatus transmits a driving force of an electric motor to a steering mechanism for steering assist. The apparatus includes a torque sensor which detects a steering wheel torque; a basic assist characteristic determining section which determines a basic assist characteristic defining a basic characteristic of a motor driving target value for the steering torque; a motor driving target value determining section which determines the motor driving target value for the steering torque in accordance with a modified assist characteristic prepared by shifting the basic assist characteristic along a steering torque coordinate axis; a shift amount determining section which determines the amount of the shift from the basic assist characteristic to the modified assist characteristic on the basis of the steering torque; and a motor driving section which drives the electric motor on the basis of the motor driving target value.Type: GrantFiled: August 27, 2004Date of Patent: November 14, 2006Assignees: Favess Co., Ltd., Koyo Seiko Co., Ltd., Toyoda Koki Kabushiki KaishaInventors: Yoshinobu Shimizu, Shinya Aono, Akihiro Nishiyama
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Patent number: 7009358Abstract: The present invention provides an electric power steering device enabled to compensate for the influence of the inertia of a steering-assisting-force generating motor on steering with accurate timing even when a steering direction is reversed at high speed. Based on steering torque and a rotation angular speed of a steering-assisting-force generating motor, a steering angular acceleration correspondence value is obtained. The device has means for regulating a gain, which is multiplied to a change acceleration of the steering torque. The motor is controlled so that the steering assisting force is corrected according to a motor output correction value obtained on the basis of the relation between the motor output correction value and the steering angular acceleration correspondence value, which is preliminarily determined and stored in such a way as to compensate for the influence of the inertia on steering, and the obtained steering angular acceleration correspondence value.Type: GrantFiled: October 30, 2003Date of Patent: March 7, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Terutaka Tamaizumi, Yoshinobu Shimizu, Shinya Aono, Akihiro Nishiyama, Takanobu Takamatsu, Masayuki Kita, Tomoyuki Yamauchi
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Patent number: 6999862Abstract: An electric power steering apparatus has a motor controlled so as to generate steering assist power according to the steering torque required to operate a steering wheel. As a result of correction of the output of the motor in accordance with a value correlating with the rotation angular velocity correspondence value of the steering wheel, in the frequency response characteristic represented by the steering frequency of the steering wheel and the amplitude ratio of the steering torque relative to the steering angle of the steering wheel, the amplitude ratio is set within a setting range, at least within the steering frequency range when a person operates the steering wheel.Type: GrantFiled: February 11, 2005Date of Patent: February 14, 2006Assignees: Favess Co., Ltd., Koyo Seiko Co., Ltd., Toyoda Koki Kabushiki KaishaInventors: Terutaka Tamaizumi, Shinya Aono
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Publication number: 20050182541Abstract: An electric power steering apparatus has a motor controlled so as to generate steering assist power according to the steering torque required to operate a steering wheel. As a result of correction of the output of the motor in accordance with a value correlating with the rotation angular velocity correspondence value of the steering wheel, in the frequency response characteristic represented by the steering frequency of the steering wheel and the amplitude ratio of the steering torque relative to the steering angle of the steering wheel, the amplitude ratio is set within a setting range, at least within the steering frequency range when a person operates the steering wheel.Type: ApplicationFiled: February 11, 2005Publication date: August 18, 2005Applicants: FAVESS CO., LTD., Koyo Seiko Co., Ltd., Toyoda Koki Kabushiki KaishaInventors: Terutaka Tamaizumi, Shinya Aono
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Publication number: 20050061577Abstract: An electric power steering apparatus which transmits a driving force of an electric motor to a steering mechanism for steering assist. The apparatus is provided with: a torque sensor which detects a steering torque applied to an operation member for steering a vehicle; a basic assist characteristic determining section which determines a basic assist characteristic defining a basic characteristic of a motor driving target value for the steering torque; a motor driving target value determining section which determines the motor driving target value for the steering torque in accordance with a modified assist characteristic prepared by shifting the basic assist characteristic along a steering torque coordinate axis; a shift amount determining section which determines the amount of the shift from the basic assist characteristic to the modified assist characteristic on the basis of the steering torque; and a motor driving section which drives the electric motor on the basis of the motor driving target value.Type: ApplicationFiled: August 27, 2004Publication date: March 24, 2005Inventors: Yoshinobu Shimizu, Shinya Aono, Akihiro Nishiyama
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Publication number: 20040140788Abstract: The present invention provides an electric power steering device enabled to compensate for the influence of the inertia of a steering-assisting-force generating motor on steering with accurate timing even when a steering direction is reversed at high speed. Based on steering torque and a rotation angular speed of a steering-assisting-force generating motor, a steering angular acceleration correspondence value is obtained. The device has means for regulating a gain, which is multiplied to a change acceleration of the steering torque. The motor is controlled so that the steering assisting force is corrected according to a motor output correction value obtained on the basis of the relation between the motor output correction value and the steering angular acceleration correspondence value, which is preliminarily determined and stored in such a way as to compensate for the influence of the inertia on steering, and the obtained steering angular acceleration correspondence value.Type: ApplicationFiled: October 30, 2003Publication date: July 22, 2004Applicant: Koyo Seiko Co., Ltd.Inventors: Terutaka Tamaizumi, Yoshinobu Shimizu, Shinya Aono, Akihiro Nishiyama, Takanobu Takamatsu, Masayuki Kita, Tomoyuki Yamauchi
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Patent number: 5363184Abstract: An automatic document conveying device is equipped with an opening/closing frame and a swing frame which are mounted on a main frame. When the opening/closing frame is turned to an open position, the document introduction passage is at least partly opened. In the document introduction passage are arranged an introduction roller, a pressing member, a feed roller, a separation roller and a plurality of document detectors. A conveyer belt mechanism is mounted on the swing frame. A plurality of electric wires are arranged extending from the opening/closing frame passing through an opening formed in the side plate of the main frame.Type: GrantFiled: September 29, 1992Date of Patent: November 8, 1994Assignee: Mita Industrial Company Ltd.Inventors: Takeshi Matsuo, Shinya Aono, Toshinori Muraoka