Patents by Inventor Shingo Urababa
Shingo Urababa 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: 20150336604Abstract: An electric power-steering device 100 comprises a steering mechanism 10, an electric motor 20 which outputs an assist force to this steering mechanism 10, a transmission mechanism 30 which comprises toothed pulleys 31, 32 and a toothed belt 33 and transmits the output power of the electric motor 20 to the steering mechanism 10, and a torque limiter 40 which sets a limit on the extent of the torque transmitted between the electric motor 20 and an output member (11) of the steering mechanism 10. In this electric power-steering device 100, a variation lower limit of a teeth jump torque at which a teeth jump occurs between the toothed pulleys 31, 32 and the toothed belt 33 is set at a value larger than a variation upper limit of a limit torque in the torque limiter 40.Type: ApplicationFiled: January 24, 2013Publication date: November 26, 2015Inventors: Shingo URABABA, Hiroyuki TOYODA, Takayuki MATSUNO
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Patent number: 8027765Abstract: A stabilizer system for a vehicle that includes a stabilizer bar and an actuator for changing stiffness of the stabilizer bar, an electric current to be supplied to an electric motor that is a drive source of the actuator is changed based on various parameters. The supply current is made smaller in a situation in which an operational direction of the actuator is toward a neutral position, than in another situation. Further, the supply current is made smaller with an increase in a distance of the operational position of the actuator from the neutral position. Moreover, the supply current is made larger with an increase in a steering speed. In detail, when the supply current is determined by multiplying a basic supply current by a control gain, the control gain is set to change depending upon the above-indicated parameter, whereby the supply current is changed based on the parameters.Type: GrantFiled: June 9, 2006Date of Patent: September 27, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shingo Urababa, Satoshi Suzuki, Yoshihiro Iida, Takashi Sugano
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Patent number: 7871083Abstract: A stabilizer system, for use in a vehicle, exhibiting an appropriate rolling-restraining effect to restrain rolling of a body of the vehicle. An electronic control unit includes a control-start-timing reference-relative-rotation-position determining portion that determines a reference relative-rotation position of two stabilizer bars from which a relative-rotation amount of the two stabilizer bars is counted when a rolling-restraining control is performed. In the stabilizer system, when a lateral acceleration exceeds a reference value, the rolling-restraining control is started; and a relative-rotation position of the two stabilizer bars when the lateral acceleration exceeds the reference value is determined as the reference relative-rotation position of the two stabilizer bars. Thus, an appropriate reference relative-rotation position of the two stabilizer bars can be easily determined and accordingly an appropriate rolling-restraining effect of the two stabilizer bars can be exhibited.Type: GrantFiled: June 7, 2006Date of Patent: January 18, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shingo Urababa, Tomoyuki Iida
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Patent number: 7725226Abstract: In a target rotational angle determining routine, based on a roll moment and longitudinal acceleration that are calculated, target rotational angles of actuators on a subject side (one of front-wheel and rear-wheel sides) and a counterpart side are obtained using a common map. An actual rotational angle on the counterpart side is read. It is determined whether the absolute value of a difference obtained by subtracting the actual rotational angle supplied from the counterpart side from the target rotational angle on the counterpart side that is obtained by the subject side is equal to or greater than a set angle difference ??0. If YES, it is determined that roll stiffness on the counterpart side is insufficient, and the target rotational angle on the subject side is changed so that a roll stiffness distribution ratio between the front-wheel side and the rear-wheel side comes close to a set distribution ratio.Type: GrantFiled: February 10, 2006Date of Patent: May 25, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shingo Urababa, Tomoyuki Iida
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Patent number: 7715963Abstract: In a stabilizer control apparatus for controlling a torsional rigidity of a stabilizer of a vehicle, an actual lateral acceleration and a calculated lateral acceleration are obtained. Then, influence amount caused by the calculated lateral acceleration is set to be greater than influence amount caused by the actual lateral acceleration, when the vehicle is moving straight, whereas the influence amount caused by the actual lateral acceleration is set to be increased, with the turning operation of the vehicle being increased, to actively control the rolling motion of the vehicle body.Type: GrantFiled: February 25, 2005Date of Patent: May 11, 2010Assignee: Aisin Seiki Kabushiki KaishaInventors: Yoshiyuki Yasui, Shingo Urababa, Shuuichi Buma
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Publication number: 20090112400Abstract: A stabilizer system for a vehicle that includes a stabilizer bar and an actuator for changing stiffness of the stabilizer bar, an electric current to be supplied to an electric motor that is a drive source of the actuator is changed based on various parameters. The supply current is made smaller in a situation in which an operational direction of the actuator is toward a neutral position, than in another situation. Further, the supply current is made smaller with an increase in a distance of the operational position of the actuator from the neutral position. Moreover, the supply current is made larger with an increase in a steering speed. In detail, when the supply current is determined by multiplying a basic supply current by a control gain, the control gain is set to change depending upon the above-indicated parameter, whereby the supply current is changed based on the parameters.Type: ApplicationFiled: June 9, 2006Publication date: April 30, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Urababa, Satoshi Suzuki, Yoshihiro Iida, Takashi Sugano
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Publication number: 20090091093Abstract: A stabilizer system, for use in a vehicle, exhibiting an appropriate rolling-restraining effect to restrain rolling of a body of the vehicle. An electronic control unit includes a control-start-timing reference-relative-rotation-position determining portion that determines a reference relative-rotation position of two stabilizer bars from which a relative-rotation amount of the two stabilizer bars is counted when a rolling-restraining control is performed. In the stabilizer system, when a lateral acceleration exceeds a reference value, the rolling-restraining control is started; and a relative-rotation position of the two stabilizer bars when the lateral acceleration exceeds the reference value is determined as the reference relative-rotation position of the two stabilizer bars. Thus, an appropriate reference relative-rotation position of the two stabilizer bars can be easily determined and accordingly an appropriate rolling-restraining effect of the two stabilizer bars can be exhibited.Type: ApplicationFiled: June 7, 2006Publication date: April 9, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Urababa, Tomoyuki Iida
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Patent number: 7418325Abstract: A suspension system for a vehicle includes a roll control device, which includes an actuator, for controlling roll, and a control device including a target control value determining portion determining target control value of the actuator and an operation control portion controlling the actuator on the basis of the target control value.Type: GrantFiled: November 22, 2005Date of Patent: August 26, 2008Assignee: Aisin Seiki Kabushiki KaishaInventors: Daisuke Yamada, Shin Matsumoto, Shingo Urababa, Satoshi Suzuki
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Patent number: 7311316Abstract: In a stabilizer control apparatus for a vehicle, a stabilizer includes a pair of stabilizer bars disposed between a right wheel and a left wheel of the vehicle, and an actuator having an electric motor and a speed reducing mechanism disposed between the stabilizer bars. A turning determination device is provided for determining change in turning operation of the vehicle. And, a controller is provided for changing a control parameter of the electric motor in response to the result determined by the turning determination device, to control a torsional rigidity of the stabilizer. As for control parameters of the electric motor, may be employed a desired value of electric current for actuating the electric motor, for example.Type: GrantFiled: February 14, 2005Date of Patent: December 25, 2007Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Yoshiyuki Yasui, Shingo Urababa, Shuuichi Buma
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Patent number: 7290772Abstract: A stabilizer control device for vehicle includes a pair of stabilizer bars (31, 32) provided between a left wheel and a right wheel of a vehicle, and an actuator including a reduction mechanism (RD) connecting between said pair of stabilizer bars (31, 32) and a motor (M) connected to the reduction mechanism (RD) for providing torsion force to said pair of stabilizer bars (31, 32) through the reduction mechanism (RD) wherein the reduction mechanism (RD) comprises a first gear (25) and a second gear (26) for generating relative rotational speeds differential therebetween, the first gear (25) and the second gear (26) are coaxially placed adjacent to each other, and opposed side faces of stabilizer bars (31, 32) are adjacently connected with the first gear (25) and the second gear (26) respectively and disposed in the reduction mechanism (RD).Type: GrantFiled: March 26, 2004Date of Patent: November 6, 2007Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Akiya Taneda, Katsumi Suzuki, Hideyuki Kobayashi, Shuuichi Buma, Masaaki Tabata, Shingo Urababa
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Publication number: 20070182110Abstract: A stabilizer system for a vehicle including: a pair of stabilizer apparatus provided for a front-wheel side and a rear-wheel side of the vehicle, each including a stabilizer bar connected at its opposite ends to respective wheel holding members for supporting left and right wheels, an actuator which includes an electric motor and which changes, by an operation of the motor, roll-restraining force exerted by the stabilizer bar, and a driver disposed between the motor and an electric power source for driving the motor; and a control device which controls the motor of each stabilizer apparatus via the driver and thereby controls an operation of the actuator, wherein the control device includes an under-both-driver-no-power-supply-state control portion which controls at least one of the drivers of the two stabilizer apparatus to be placed into a phase-interconnection operation state in which terminals of respective phases of the motor are electrically connected to each other, when both of the drivers of the two sType: ApplicationFiled: January 29, 2007Publication date: August 9, 2007Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shingo URABABA
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Publication number: 20060212199Abstract: In a target rotational angle determining routine, based on a roll moment and longitudinal acceleration that are calculated, target rotational angles of actuators on a subject side (one of front-wheel and rear-wheel sides) and a counterpart side are obtained using a common map. An actual rotational angle on the counterpart side is read. It is determined whether the absolute value of a difference obtained by subtracting the actual rotational angle supplied from the counterpart side from the target rotational angle on the counterpart side that is obtained by the subject side is equal to or greater than a set angle difference ??0. If YES, it is determined that roll stiffness on the counterpart side is insufficient, and the target rotational angle on the subject side is changed so that a roll stiffness distribution ratio between the front-wheel side and the rear-wheel side comes close to a set distribution ratio.Type: ApplicationFiled: February 10, 2006Publication date: September 21, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Urababa, Tomoyuki Iida
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Publication number: 20060116802Abstract: A suspension system for a vehicle includes a roll control device, which includes an actuator, for controlling roll, and a control device including a target control value determining portion determining target control value of the actuator and an operation control portion controlling the actuator on the basis of the target control value.Type: ApplicationFiled: November 22, 2005Publication date: June 1, 2006Applicant: Aisin Seiki Kabushiki KaishaInventors: Daisuke Yamada, Shin Matsumoto, Shingo Urababa, Satoshi Suzuki
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Patent number: 7032441Abstract: A tire-state obtaining apparatus operable to detect the states of tires of wheels and including (a) wheel-side devices each including a transmitter device (42), and (b) a body-side device including a receiver device operable to receive tire information from the wheel-side devices, wherein the positions of the wheels from which sets of the tire information have been transmitted are determined on the basis of the condition in which the receiver device receives the tire information. The receiver device includes a plurality of antennas oriented to receive the tire information from the respective wheel-side devices, and the wheel corresponding to the antenna having the highest intensity of reception of the tire information can be determined as the wheel from which the tire information has been transmitted, so that the antennas need not be located near the respective wheels, to identify the wheels.Type: GrantFiled: March 20, 2003Date of Patent: April 25, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masaki Kanatani, Atsushi Ogawa, Takashi Doi, Shingo Urababa, Masaaki Tabata, Hideki Kusunoki, Kouichi Morita
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Publication number: 20050236793Abstract: A stabilizer control device for vehicle includes a pair of stabilizer bars (31, 32) provided between a left wheel and a right wheel of a vehicle, and an actuator including a reduction mechanism (RD) connecting between said pair of stabilizer bars (31, 32) and a motor (M) connected to the reduction mechanism (RD) for providing torsion force to said pair of stabilizer bars (31, 32) through the reduction mechanism (RD) wherein the reduction mechanism (RD) comprises a first gear (25) and a second gear (26) for generating relative rotational speeds differential therebetween, the first gear (25) and the second gear (26) are coaxially placed adjacent to each other, and opposed side faces of stabilizer bars (31, 32) are adjacently connected with the first gear (25) and the second gear (26) respectively and disposed in the reduction mechanism (RD).Type: ApplicationFiled: March 26, 2004Publication date: October 27, 2005Inventors: Akiya Taneda, Katsumi Suzuki, Hideyuki Kobayashi, Shuuichi Buma, Masaaki Tabata, Shingo Urababa
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Publication number: 20050192728Abstract: In a stabilizer control apparatus for controlling a torsional rigidity of a stabilizer of a vehicle, an actual lateral acceleration and a calculated lateral acceleration are obtained. Then, influence amount caused by the calculated lateral acceleration is set to be greater than influence amount caused by the actual lateral acceleration, when the vehicle is moving straight, whereas the influence amount caused by the actual lateral acceleration is set to be increased, with the turning operation of the vehicle being increased, to actively control the rolling motion of the vehicle body.Type: ApplicationFiled: February 25, 2005Publication date: September 1, 2005Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Yoshiyuki Yasui, Shingo Urababa, Shuuichi Buma
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Publication number: 20050179221Abstract: In a stabilizer control apparatus for a vehicle, a stabilizer includes a pair of stabilizer bars disposed between a right wheel and a left wheel of the vehicle, and an actuator having an electric motor and a speed reducing mechanism disposed between the stabilizer bars. A turning determination device is provided for determining change in turning operation of the vehicle. And, a controller is provided for changing a control parameter of the electric motor in response to the result determined by the turning determination device, to control a torsional rigidity of the stabilizer. As for control parameters of the electric motor, may be employed a desired value of electric current for actuating the electric motor, for example.Type: ApplicationFiled: February 14, 2005Publication date: August 18, 2005Applicants: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiyuki Yasui, Shingo Urababa, Shuuichi Buma
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Publication number: 20050172707Abstract: A tire-state obtaining apparatus operable to detect the states of tires of wheels and including (a) wheel-side devices each including a transmitter device (42), and (b) a body-side device including a receiver device operable to receive tire information from the wheel-side devices, wherein the positions of the wheels from which sets of the tire information have been transmitted are determined on the basis of the condition in which the receiver device receives the tire information. The receiver device includes a plurality of antennas oriented to receive the tire information from the respective wheel-side devices, and the wheel corresponding to the antenna having the highest intensity of reception of the tire information can be determined as the wheel from which the tire information has been transmitted, so that the antennas need not be located near the respective wheels, to identify the wheels.Type: ApplicationFiled: March 20, 2003Publication date: August 11, 2005Inventors: Masaki Kanatani, Atsushi Ogawa, Takashi Doi, Shingo Urababa, Masaaki Tabata, Hideki Kusunoki, Kouichi Morita
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Patent number: 6244674Abstract: The present invention is directed to a brake control system for an electrically operated vehicle, which is adapted to reduce a regenerative braking torque and add a hydraulic braking force. A motor control unit is provided for controlling an electric motor to apply a rotating force to a wheel and apply the regenerative braking torque to the wheel. A pressure control device is provided for controlling a hydraulic braking pressure generated by a pressure generator in response to operation of a manually operated braking member, and supplied to a wheel brake cylinder, which is operatively mounted on the wheel for applying a hydraulic braking force to the wheel. The regenerative braking torque is reduced in response to a braking condition monitored by a monitor. A pressure difference is detected between the hydraulic braking pressure of the brake fluid discharged from the pressure generator and the hydraulic braking pressure in the wheel brake cylinder.Type: GrantFiled: September 16, 1998Date of Patent: June 12, 2001Assignee: Aisin Seiki Kabushiki KaishaInventors: Tetsuya Kuno, Tadashi Terazawa, Yoshinori Suzuki, Harumi Ohori, Shingo Urababa
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Patent number: 6231134Abstract: A vehicle braking system including a frictional braking device for applying a frictional braking torque to each of a plurality of wheels of the vehicle, a regenerative braking device including at least one electric motor for applying a regenerative braking torque to at least one drive wheel of the vehicle, and a total braking torque control device for controlling a total braking torque including one or both of the regenerative braking torque and the frictional braking torque which are applied to each of the wheels. When the total braking torque of at least one of the wheels has exceeded an upper limit corresponding to a friction coefficient of a road surface on which the motor vehicle is running, the total braking torque control device operates to zero the regenerative braking torque of each of the above-indicated at least one wheel and control the frictional braking torque of this wheel while reducing an influence of the zeroing of the regenerative braking torque.Type: GrantFiled: July 28, 1998Date of Patent: May 15, 2001Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki KaishaInventors: Tsukasa Fukasawa, Akira Sakai, Hiroki Asada, Junichi Sakamoto, Shingo Urababa, Yoshinori Suzuki, Toshiyuki Sakai, Naoyasu Enomoto