Patents by Inventor Takahisa Yokoyama
Takahisa Yokoyama 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: 20190347810Abstract: A recognition apparatus is provided which includes an input section that receives image information from a front camera and a rear camera, and a calculation section that performs a forward recognition process that is a recognition process targeting the image information from the front camera received by the input section and a rearward recognition process that is a recognition process targeting the image information from the rear camera received by the input section. The calculation section includes an acquisition section that acquires first information representing whether an own vehicle is in a state of moving forward or a state of moving rearward and second information representing a traveling condition of the own vehicle, and a process selection section that selects processes to be performed as the forward recognition process and the rearward recognition process, based on the first and second information acquired by the acquisition section.Type: ApplicationFiled: June 12, 2019Publication date: November 14, 2019Inventors: Takahisa YOKOYAMA, Kensuke YOKOI, Tatsuru KUWABARA
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Patent number: 10279809Abstract: A travelled-route selecting apparatus includes a first route selecting unit to select, from travelled routes of other vehicles generated by a route generating unit, one or more travelled routes. The one or more travelled routes each have a relative distance relative to an own vehicle equal to or lower than a predetermined threshold value. The travelled-route selecting apparatus includes a second route selecting unit to select, from the travelled routes selected by the first route selecting unit, a travelled route corresponding to a selected other vehicle. The selected other vehicle is the closest to the own vehicle among the other vehicles corresponding to the travelled routes selected by the first route selecting unit.Type: GrantFiled: February 10, 2016Date of Patent: May 7, 2019Assignee: DENSO CORPORATIONInventors: Toshiya Habu, Takahisa Yokoyama
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Patent number: 10150475Abstract: A traveling control apparatus includes a generation section generating traveling paths from a history of positions of vehicles present ahead of an own vehicle, a first control section defining one vehicle, which runs in a driving lane of the own vehicle, as a target, and making a lateral position of the own vehicle follow a lateral position which is a position of the target in a width direction of the own vehicle, a determination section determining, when follow-up control is performed, whether or not, in the driving lane, one of the vehicles cuts in a space between the own vehicle and the target, and a first selection section selecting, when cutting in is determined to occur, the current target or the cut-in vehicle as the target, based on a result of comparison between the lateral positions on the traveling paths respectively generated for the current target and the cut-in vehicle.Type: GrantFiled: May 18, 2016Date of Patent: December 11, 2018Assignee: DENSO CORPORATIONInventors: Toshiya Habu, Takahisa Yokoyama
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Publication number: 20180022351Abstract: A travelled-route selecting apparatus includes a first route selecting unit to select, from travelled routes of other vehicles generated by a route generating unit, one or more travelled routes. The one or more travelled routes each have a relative distance relative to an own vehicle equal to or lower than a predetermined threshold value. The travelled-route selecting apparatus includes a second route selecting unit to select, from the travelled routes selected by the first route selecting unit, a travelled route corresponding to a selected other vehicle. The selected other vehicle is the closest to the own vehicle among the other vehicles corresponding to the travelled routes selected by the first route selecting unit.Type: ApplicationFiled: February 10, 2016Publication date: January 25, 2018Inventors: Toshiya HABU, Takahisa YOKOYAMA
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Publication number: 20160339914Abstract: A traveling control apparatus includes a generation section generating traveling paths from a history of positions of vehicles present ahead of an own vehicle, a first control section defining one vehicle, which runs in a driving lane of the own vehicle, as a target, and making a lateral position of the own vehicle follow a lateral position which is a position of the target in a width direction of the own vehicle, a determination section determining, when follow-up control is performed, whether or not, in the driving lane, one of the vehicles cuts in a space between the own vehicle and the target, and a first selection section selecting, when cutting in is determined to occur, the current target or the cut-in vehicle as the target, based on a result of comparison between the lateral positions on the traveling paths respectively generated for the current target and the cut-in vehicle.Type: ApplicationFiled: May 18, 2016Publication date: November 24, 2016Inventors: Toshiya Habu, Takahisa Yokoyama
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Publication number: 20160339919Abstract: A lane merging determination apparatus is provided which includes a first generation section that generates a first path, which is a prospective traveling path of an own vehicle, a second generation section that generates a second path corresponding to a traveling path of an adjacent vehicle, which is one of vehicles present ahead of the own vehicle and runs in a lane adjacent to a driving lane of the own vehicle, based on a history of positions of the vehicles, an intersection determination section that determines whether or not the first path and the second path intersect with each other; and a merging determination section that determines that the lanes merge with each other in front of the own vehicle, if the intersection determination section determines that the first path and the second path intersect with each other.Type: ApplicationFiled: May 18, 2016Publication date: November 24, 2016Inventors: Toshiya Habu, Takahisa Yokoyama
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Patent number: 9390624Abstract: A vehicle-installation intersection judgment apparatus determines whether a target object such as a pedestrian is located ahead and to one side of the vehicle, and if so, judges whether the object is moving laterally to intersect with the advancement of the vehicle. Successive amounts of lateral displacement of the object are periodically derived, each amount is compared with a displacement threshold, a count is made of the number of times that the displacement threshold is exceeded, and the count is compared with a predetermined count threshold. The judgment concerning the target object is made based upon whether the count threshold is attained.Type: GrantFiled: March 27, 2014Date of Patent: July 12, 2016Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Akitoshi Minemura, Yoshihisa Ogata, Takahisa Yokoyama
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Patent number: 8985283Abstract: A vehicle brake apparatus capable of preventing abnormal vibration due to thickness variations in a disc rotor includes a motor drive unit configured to control the motor which presses the brake pad against the disc rotor, a brake pressure detection unit for detecting a braking pressure for pressing the brake pad, and a wheel speed sensor for detecting a rotation speed of the disc rotor. If an amount of variation in the detection values detected by the brake pressure detection unit during one rotation of the disc rotor exceeds a variation amount determination threshold value and a detection value variation frequency has a correlation with the rotation speed of the disc rotor and the detection value variation frequency exceeds a variation frequency determination threshold value, the motor drive unit controls the motor in inverted phase to the variation in the detection values.Type: GrantFiled: February 24, 2011Date of Patent: March 24, 2015Assignees: Advics Co., Ltd., Toyoto Jidosha Kabushiki KaishaInventors: Yusuke Oshio, Takahisa Yokoyama, Akira Sakai, Naoki Yabusaki, Shinsuke Yamamoto
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Publication number: 20140297171Abstract: A vehicle-installation intersection judgement apparatus determines whether a target object such as a pedestrian is located ahead and to one side of the vehicle, and if so, judges whether the object is moving laterally to intersect with the advancement of the vehicle. Successive amounts of lateral displacement of the object are periodically derived, each amount is compared with a displacement threshold, a count is made of the number of times that the displacement threshold is exceeded, and the count is compared with a predetermined count threshold. The judgement concerning the target object is made based upon whether the count threshold is attained.Type: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Applicants: Nippon Soken, Inc., DENSO CORPORATIONInventors: Akitoshi Minemura, Yoshihisa Ogata, Takahisa Yokoyama
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Patent number: 8660767Abstract: A control apparatus is provided to control the stopping of a vehicle. The control apparatus comprises a speed detector that detects a speed of a vehicle, speed acquiring means, target setting means, and control means. The speed acquiring means acquires an actual speed of the vehicle from detected results of the speed detector. The target setting means sets a target acceleration of the vehicle depending on the actual speed when the vehicle is stopped automatically. The control means controls an actual acceleration of the vehicle at the target acceleration.Type: GrantFiled: August 8, 2008Date of Patent: February 25, 2014Assignee: DENSO CORPORATIONInventors: Yasuhiro Nakai, Shotaro Fukuda, Satoshi Niwa, Hajime Kumabe, Yukio Mori, Hiroyuki Kodama, Takahisa Yokoyama
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Publication number: 20120285777Abstract: A vehicle brake apparatus capable of preventing abnormal vibration due to thickness variations in a disc rotor includes a motor drive unit configured to control the motor which presses the brake pad against the disc rotor, a brake pressure detection unit for detecting a braking pressure for pressing the brake pad, and a wheel speed sensor for detecting a rotation speed of the disc rotor. If an amount of variation in the detection values detected by the brake pressure detection unit during one rotation of the disc rotor exceeds a variation amount determination threshold value and a detection value variation frequency has a correlation with the rotation speed of the disc rotor and the detection value variation frequency exceeds a variation frequency determination threshold value, the motor drive unit controls the motor in inverted phase to the variation in the detection values.Type: ApplicationFiled: February 24, 2011Publication date: November 15, 2012Applicant: ADVICS CO., LTDInventors: Yusuke Oshio, Takahisa Yokoyama, Akira Sakai, Naoki Yabusaki, Shinsuke Yamamoto
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Patent number: 8220594Abstract: An electric brake device comprises a caliper holding braking members and having an electric motor attached thereto, a reduction mechanism for transmitting an input rotation of one input element thereof from the electric motor to two output elements thereof at reduced speeds, a rotation-linear motion converting mechanism for converting the rotation of one of the output elements into a linear motion of one of the braking members, and a thrust force support member connected to the other output element and screw-engaged with the caliper, wherein the rotation-linear motion converting mechanism is supported by the thrust force support member to be movable together in a thrust direction and is provided with rotation limiting portions for limiting the rotation in a reverse direction of the one output element to a predetermined range, and wherein the thrust force support member is set to be greater in resistance to operation than the rotation-linear motion converting mechanism.Type: GrantFiled: August 22, 2008Date of Patent: July 17, 2012Assignees: Nippon Soken, Inc, Advics Co., Ltd.Inventors: Tomohiko Tsuruta, Motonori Tominaga, Haruo Arakawa, Takayuki Takeshita, Jin Yamada, Takahisa Yokoyama
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Patent number: 7543688Abstract: A brake apparatus is provided for braking a vehicle wheel, and includes a brake member rotated integrally with the wheel, a friction member mounted on the vehicle to be in contact with the brake member, a rotation member rotated integrally with the wheel, an electric motor, and a differential shift device. A motion converter is provided for converting a rotating motion of the motor into a thrust motion of the friction member to be pressed onto the brake member. For example, one of three components of the differential shift device is movable in response to rotation of the rotation member, another one is movable in response to rotation of the electric motor, and the rest is movable in response to operation of the motion converter.Type: GrantFiled: December 1, 2005Date of Patent: June 9, 2009Assignee: Advics Co., Ltd.Inventors: Haruo Arakawa, Takahisa Yokoyama, Takayuki Takeshita, Chihiro Nitta
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Patent number: 7537096Abstract: A motor driven brake apparatus is provided for braking a wheel mounted on a knuckle, and includes a brake member rotated integrally with the wheel, a friction member mounted on the knuckle to be capable of being in contact with the brake member, and an electric motor for driving the friction member toward the brake member to be in contact therewith. The motor is adapted to press the friction member onto the brake member to restrain the wheel from rotating. And, a motion converter is accommodated in an opening portion of the knuckle for converting rotating force of the motor into pressing force applied by the friction member onto the brake member. The motion converter is connected to the motor at a side thereof facing the vehicle body, and the motor is mounted on the knuckle.Type: GrantFiled: December 1, 2005Date of Patent: May 26, 2009Assignee: Advics Co., Ltd.Inventors: Haruo Arakawa, Takahisa Yokoyama, Takayuki Takeshita, Chihiro Nitta
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Publication number: 20090057074Abstract: An electric brake device comprises a caliper holding braking members and having an electric motor attached thereto, a reduction mechanism for transmitting an input rotation of one input element thereof from the electric motor to two output elements thereof at reduced speeds, a rotation-linear motion converting mechanism for converting the rotation of one of the output elements into a linear motion of one of the braking members, and a thrust force support member connected to the other output element and screw-engaged with the caliper, wherein the rotation-linear motion converting mechanism is supported by the thrust force support member to be movable together in a thrust direction and is provided with rotation limiting portions for limiting the rotation in a reverse direction of the one output element to a predetermined range, and wherein the thrust force support member is set to be greater in resistance to operation than the rotation-linear motion converting mechanism.Type: ApplicationFiled: August 22, 2008Publication date: March 5, 2009Inventors: Tomohiko TSURUTA, Motonori Tominaga, Haruo Arakawa, Takayuki Takeshita, Jin Yamada, Takahisa Yokoyama
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Publication number: 20090043474Abstract: A control apparatus is provided to control the stopping of a vehicle. The control apparatus comprises a speed detector that detects a speed of a vehicle, speed acquiring means, target setting means, and control means. The speed acquiring means acquires an actual speed of the vehicle from detected results of the speed detector. The target setting means sets a target acceleration of the vehicle depending on the actual speed when the vehicle is stopped automatically. The control means controls an actual acceleration of the vehicle at the target acceleration.Type: ApplicationFiled: August 8, 2008Publication date: February 12, 2009Applicant: DENSO CORPORATIONInventors: Yasuhiro NAKAI, Shotaro FUKUDA, Satoshi NIWA, Hajime KUMABE, Yukio MORI, Hiroyuki KODAMA, Takahisa YOKOYAMA
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Patent number: 7195323Abstract: The present invention provides an electric brake system in which an actual control variable in the electric brake when overshooting is generated is determined, and the target value is set to a maximum value of the actual control variable in the electric brake when overshooting is generated. Therefore, the target value and the actual control variable will be in agreement with each other before hunting to be generated after overshooting starts. Accordingly, the output of the electric brake is gradually stabilizing at the target value without an oscillation phenomenon as in a related art.Type: GrantFiled: August 5, 2004Date of Patent: March 27, 2007Assignee: Advics Co., Ltd.Inventors: Haruo Arakawa, Takahisa Yokoyama, Takayuki Takeshita
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Patent number: 7188913Abstract: A vehicular motor-driven brake apparatus includes an open circuit in which reciprocation of a master cylinder generating a brake pressure is caused by an actuator that operates according to a pedal operation amount, and brake fluid discharged from a wheel cylinder during pressure decrease is directly returned to a master reservoir subject to atmospheric pressure. A fluid amount replenishment control is executed during pressure increase of the master cylinder in which a master stroke is returned for only a predetermined time by operation of the actuator, and thus brake fluid is sucked up from the master reservoir to the master cylinder. Accordingly, when an ABS control continues for a long time period, even if the brake pedal is being depressed, reduced pressure brake fluid in the master cylinder is sucked up. Therefore, there is no limit to pressure decrease, and bottoming-out of the master cylinder does not occur.Type: GrantFiled: March 8, 2005Date of Patent: March 13, 2007Assignee: Advics Co., LtdInventors: Takahisa Yokoyama, Takayuki Takeshita, Haruo Arakawa
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Publication number: 20060238020Abstract: A braking force reduction control that reduces the braking force applied to the vehicle wheels is performed when braking of the vehicle is detected. More specifically, the braking force reduction control is started when a speed change of the deceleration of the vehicle has a reducing tendency, namely, when the speed change is equal to or less than a predetermined threshold value.Type: ApplicationFiled: April 13, 2006Publication date: October 26, 2006Inventors: Chihiro Nitta, Takahisa Yokoyama, Haruo Arakawa, Takayuki Takeshita
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Patent number: 7081063Abstract: An internal planetary gear mechanism reduces a load applied to tooth surfaces of an external gear and an internal gear, a sliding portion such as a bearing and the like. By setting the amount of eccentricity ? of an eccentric part to be larger than a theoretical value, a distance between the center of the external gear and the center of the internal gear is increased to allow the reduction of a loss in the bearing and on the tooth surfaces of the gears, and a mesh zone between the internal gear and the external gear can be reduced to decrease a part at a large pressure angle, thereby reducing a loss generated by a large pressure angle. As a result of reduction in the mesh zone between the external gear and the internal gear, rolling contact of the gears is maintained.Type: GrantFiled: August 30, 2004Date of Patent: July 25, 2006Assignees: Denso Corp., Nippon Soken, Inc., ADVICS Co., Ltd.Inventors: Masashi Hori, Masamichi Watanabe, Akihiko Takenaka, Takahisa Yokoyama, Takayuki Takeshita, Yuzo Imoto