Patents by Inventor Yasuhiro Ijichi
Yasuhiro Ijichi 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: 8816676Abstract: The position sensor includes a shift lever used to select one of five ranges P, R, N, D, and B, fixed contacts corresponding to the ranges P, R, N, D, and B, and movable contacts configured to be electrically connected to the fixed contacts. The fixed contacts include regular fixed contacts, first backup fixed contacts, and second backup fixed contacts. The first and second backup fixed contacts have their lengths in the moving direction of the movable contacts configured to be longer than the length of the regular fixed contact that corresponds to the first and second backup fixed contacts.Type: GrantFiled: November 13, 2012Date of Patent: August 26, 2014Assignee: Honda Motor Co., Ltd.Inventors: Hideaki Yamashita, Yasuhiro Ijichi, Hiroshi Takei
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Patent number: 8544577Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.Type: GrantFiled: June 25, 2009Date of Patent: October 1, 2013Assignee: Honda Motor Co., LtdInventors: Kazuhiko Kitano, Masachika Kimura, Yasuhiro Ijichi, Yutaka Ishikawa, Takashi Horiguchi
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Patent number: 8498791Abstract: A lock-up control apparatus includes a kick-down instruction detector configured to detect a kick-down shift transmission instruction during application of a lock-up clutch. A first lock-up control amount changer is configured to change the lock-up control amount when the kick-down shift transmission instruction is detected. An intermediate gear speed determinator is configured to determine whether the kick-down shift transmission instruction includes an intermediate gear speed shift transmission instruction to an intermediate shift transmission gear speed. A second lock-up control amount changer is configured to change the lock-up control amount when the kick-down shift transmission instruction includes the intermediate gear speed shift transmission instruction. A target gear speed shift transmission instruction detector is configured to detect a target gear speed shift transmission instruction.Type: GrantFiled: November 26, 2010Date of Patent: July 30, 2013Assignee: Honda Motor Co., Ltd.Inventors: Akio Muto, Masaaki Takamatsu, Yasuhiro Ijichi
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Patent number: 8061463Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.Type: GrantFiled: November 18, 2005Date of Patent: November 22, 2011Assignee: Honda Motor Co., Ltd.Inventors: Kazuhiko Kitano, Masachika Kimura, Yasuhiro Ijichi, Yutaka Ishikawa, Takashi Horiguchi
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Publication number: 20110130933Abstract: A lock-up control apparatus includes a kick-down instruction detector configured to detect a kick-down shift transmission instruction during application of a lock-up clutch. A first lock-up control amount changer is configured to change the lock-up control amount when the kick-down shift transmission instruction is detected. An intermediate gear speed determinator is configured to determine whether the kick-down shift transmission instruction includes an intermediate gear speed shift transmission instruction to an intermediate shift transmission gear speed. A second lock-up control amount changer is configured to change the lock-up control amount when the kick-down shift transmission instruction includes the intermediate gear speed shift transmission instruction. A target gear speed shift transmission instruction detector is configured to detect a target gear speed shift transmission instruction.Type: ApplicationFiled: November 26, 2010Publication date: June 2, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Akio MUTO, Masaaki Takamatsu, Yasuhiro Ijichi
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Publication number: 20090294194Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.Type: ApplicationFiled: June 25, 2009Publication date: December 3, 2009Applicant: HONDA MOTOR CO., LTDInventors: Kazuhiko KITANO, Masachika KIMURA, Yasuhiro IJICHI, Yutaka ISHIKAWA, Takashi HORIGUCHI
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Publication number: 20060108163Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.Type: ApplicationFiled: November 18, 2005Publication date: May 25, 2006Applicant: HONDA MOTOR CO., LTD.Inventors: Kazuhiko Kitano, Masachika Kimura, Yasuhiro Ijichi, Yutaka Ishikawa, Takashi Horiguchi
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Patent number: 6511400Abstract: A control system for executing an upshift from an off-going speed ratio to an on-coming speed ratio by controlling the release of the hydraulic pressure from the frictionally engaging element used for the off-going speed ratio and by controlling the supply of the hydraulic pressure to the frictionally engaging element used for the on-coming speed ratio comprises first and second off-going pressure releasing valves 70 and 80, which release the hydraulic pressure of the frictionally engaging element used for the off-going speed ratio, and a linear solenoid valve 60, which controls the operation of the off-going pressure releasing valves. The linear solenoid valve 60 controls the operation of the off-going pressure releasing valves in correspondence to the throttle opening of the engine. In this case, the smaller the throttle opening of the engine, the earlier the timing for releasing the hydraulic pressure from the frictionally engaging element used for the off-going speed ratio is set.Type: GrantFiled: August 30, 2001Date of Patent: January 28, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroyuki Kimura, Yasuhiro Ijichi, Yuuji Okazaki
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Patent number: 5478294Abstract: A control apparatus for a hydraulically operated vehicular transmission has a plurality of transmission trains to be established by a selective operation of a plurality of hydraulic engaging elements. The apparatus has a selecting device for selecting a transmission train according to a running condition of a vehicle. The apparatus is provided with a detecting device for detecting a power transmission capability value of the hydraulic engaging elements, and a device for determining a transmission train to be established, based on a detected result of the detecting device and a selected result of the selecting device. The detecting device detects a hydraulic engaging element whose power transmission capability value is above a predetermined value and designates a transmission train that corresponds to the detected hydraulic engaging element.Type: GrantFiled: June 27, 1994Date of Patent: December 26, 1995Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hideo Furukawa, Chihiro Matsubara, Yasuhiro Ijichi