Patents by Inventor Hiromasa Takai
Hiromasa Takai 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: 11565669Abstract: A braking force controller causes a first actuator unit to generate a target jerk when the target jerk is equal to or larger than a first jerk, causes the first actuator unit to generate the first jerk and a second actuator unit to generate a jerk obtained by subtracting the first jerk from the target jerk as an additional jerk when the target jerk is smaller than the first jerk and equal to or larger than the sum of the first jerk and a second jerk, and causes the first actuator unit to generate the first jerk and the second actuator unit to generate the second jerk as the additional jerk when the target jerk is smaller than the sum of the first jerk and the second jerk.Type: GrantFiled: April 14, 2022Date of Patent: January 31, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun Sato, Kazuki Miyake, Yoshihisa Yamada, Akitsugu Sakai, Kazumitsu Sugano, Hiroya Fujiwara, Hiromasa Takai
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Patent number: 11498560Abstract: A braking force controller includes: a target jerk calculation unit; a first estimation unit configured to estimate an increment of braking force when a prescribed factor that increases braking force to be generated by the first actuator unit currently occurs; a second estimation unit configured to estimate the increment of the braking force when the prescribed factor occurs within a prescribed period; and a control unit configured to determine a negative jerk generated when the second actuator unit generates the braking force such that a sum of the negative jerk and the jerk generated by the first actuator unit without the prescribed factor becomes the target jerk. When the increment of the braking force due to the prescribed factor is larger than a prescribed value, the control unit corrects the determined negative jerk such that an absolute value of the negative jerk becomes smaller.Type: GrantFiled: August 6, 2021Date of Patent: November 15, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun Sato, Hiromasa Takai
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Publication number: 20220234553Abstract: A braking force controller causes a first actuator unit to generate a target jerk when the target jerk is equal to or larger than a first jerk, causes the first actuator unit to generate the first jerk and a second actuator unit to generate a jerk obtained by subtracting the first jerk from the target jerk as an additional jerk when the target jerk is smaller than the first jerk and equal to or larger than the sum of the first jerk and a second jerk, and causes the first actuator unit to generate the first jerk and the second actuator unit to generate the second jerk as the additional jerk when the target jerk is smaller than the sum of the first jerk and the second jerk.Type: ApplicationFiled: April 14, 2022Publication date: July 28, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun SATO, Kazuki MIYAKE, Yoshihisa YAMADA, Akitsugu SAKAI, Kazumitsu SUGANO, Hiroya FUJIWARA, Hiromasa TAKAI
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Patent number: 11338779Abstract: A braking force controller causes a first actuator unit to generate a target jerk when the target jerk is equal to or larger than a first jerk, causes the first actuator unit to generate the first jerk and a second actuator unit to generate a jerk obtained by subtracting the first jerk from the target jerk as an additional jerk when the target jerk is smaller than the first jerk and equal to or larger than the sum of the first jerk and a second jerk, and causes the first actuator unit to generate the first jerk and the second actuator unit to generate the second jerk as the additional jerk when the target jerk is smaller than the sum of the first jerk and the second jerk.Type: GrantFiled: January 15, 2020Date of Patent: May 24, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun Sato, Kazuki Miyake, Yoshihisa Yamada, Akitsugu Sakai, Kazumitsu Sugano, Hiroya Fujiwara, Hiromasa Takai
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Publication number: 20210362717Abstract: A braking force controller includes: a target jerk calculation unit; a first estimation unit configured to estimate an increment of braking force when a prescribed factor that increases braking force to be generated by the first actuator unit currently occurs; a second estimation unit configured to estimate the increment of the braking force when the prescribed factor occurs within a prescribed period; and a control unit configured to determine a negative jerk generated when the second actuator unit generates the braking force such that a sum of the negative jerk and the jerk generated by the first actuator unit without the prescribed factor becomes the target jerk. When the increment of the braking force due to the prescribed factor is larger than a prescribed value, the control unit corrects the determined negative jerk such that an absolute value of the negative jerk becomes smaller.Type: ApplicationFiled: August 6, 2021Publication date: November 25, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun SATO, Hiromasa TAKAI
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Patent number: 11110926Abstract: A braking force controller includes: a target jerk calculation unit; a first estimation unit configured to estimate an increment of braking force when a prescribed factor that increases braking force to be generated by the first actuator unit currently occurs; a second estimation unit configured to estimate the increment of the braking force when the prescribed factor occurs within a prescribed period; and a control unit configured to determine a negative jerk generated when the second actuator unit generates the braking force such that a sum of the negative jerk and the jerk generated by the first actuator unit without the prescribed factor becomes the target jerk. When the increment of the braking force due to the prescribed factor is larger than a prescribed value, the control unit corrects the determined negative jerk such that an absolute value of the negative jerk becomes smaller.Type: GrantFiled: March 12, 2020Date of Patent: September 7, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun Sato, Hiromasa Takai
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Patent number: 10808835Abstract: A shift control device of a vehicle including an internal combustion engine and a multi-speed transmission in series, the shift control device comprises: a control portion providing a downshift control in which an input shaft rotation speed of the multi-speed transmission is increased through a torque-up of the internal combustion engine toward a post-shift input shaft rotation speed in a neutral state where a release-side engagement device to be released during a downshift of the multi-speed transmission is released, so as to engage an engagement-side engagement device to be engaged after the shift. In the case of a shift pattern having a large internal inertia of the multi-speed transmission, the control portion controls a torque capacity of the engagement-side engagement device to a value greater than zero before starting a torque-up control of the internal combustion engine.Type: GrantFiled: March 1, 2018Date of Patent: October 20, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Norihiro Tsukamoto, Tomohiro Asami, Hiromasa Takai, Masataka Hirano, Daiki Fukuda, Takuma Sugino
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Publication number: 20200324774Abstract: A braking force controller includes: a target jerk calculation unit; a first estimation unit configured to estimate an increment of braking force when a prescribed factor that increases braking force to be generated by the first actuator unit currently occurs; a second estimation unit configured to estimate the increment of the braking force when the prescribed factor occurs within a prescribed period; and a control unit configured to determine a negative jerk generated when the second actuator unit generates the braking force such that a sum of the negative jerk and the jerk generated by the first actuator unit without the prescribed factor becomes the target jerk. When the increment of the braking force due to the prescribed factor is larger than a prescribed value, the control unit corrects the determined negative jerk such that an absolute value of the negative jerk becomes smaller.Type: ApplicationFiled: March 12, 2020Publication date: October 15, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun SATO, Hiromasa TAKAI
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Publication number: 20200262398Abstract: A braking force controller causes a first actuator unit to generate a target jerk when the target jerk is equal to or larger than a first jerk, causes the first actuator unit to generate the first jerk and a second actuator unit to generate a jerk obtained by subtracting the first jerk from the target jerk as an additional jerk when the target jerk is smaller than the first jerk and equal to or larger than the sum of the first jerk and a second jerk, and causes the first actuator unit to generate the first jerk and the second actuator unit to generate the second jerk as the additional jerk when the target jerk is smaller than the sum of the first jerk and the second jerk.Type: ApplicationFiled: January 15, 2020Publication date: August 20, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun SATO, Kazuki MIYAKE, Yoshihisa YAMADA, Akitsugu SAKAI, Kazumitsu SUGANO, Hiroya FUJIWARA, Hiromasa TAKAI
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Patent number: 10415701Abstract: An electronic control unit is configured to control a hydraulic pressures of engaging element and disengaging element in accordance with a preset target output shaft torque during a power-on downshift. The electronic control unit is configured to delay a start of decrease in the hydraulic pressure of the disengaging element from a start of a torque phase while maintain the hydraulic pressure of the disengaging element at the start of the torque phase. The electronic control unit is configured to start decreasing the hydraulic pressure of the disengaging element when the electronic control unit determines that overspeed of an input shaft is occurring during the torque phase and a predetermined condition is established.Type: GrantFiled: July 25, 2017Date of Patent: September 17, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiro Chimbe, Norihiro Tsukamoto, Keisuke Ota, Tomohiro Asami, Hiromasa Takai, Daiki Fukuda
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Patent number: 10323743Abstract: A control device of a vehicle including a motor and a multi-speed type automatic transmission including a plurality of engagement devices, the control device engaging the engagement device to be engaged and releasing the engagement device to be released when the shift is determined, and controlling an engagement pressure of an engagement device to be released during an upshift in a driven state and a downshift in a driving state and controlling an engagement pressure of an engagement device to be engaged during an upshift in the driving state and a downshift in the driven state so as to control a rotation speed of a rotating element of the automatic transmission, the control device increasing an instruction pressure of the engagement device to a target surge pressure for a target surge time when switching is performed during the upshift and the downshift in the driven state, to the driving state.Type: GrantFiled: July 19, 2017Date of Patent: June 18, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihiro Tsukamoto, Tomohiro Asami, Keisuke Ota, Hiromasa Takai
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Patent number: 10288131Abstract: A vehicle control device including a multi-speed transmission switching gear shift positions in accordance with a combination of hydraulic friction engagement devices operations and pressure control solenoid valves, the control device shifting gears by providing a shift output signal including a quick-apply signal to the valves after a first time from a shift request, the control device has: a pulsation drive control portion to control selectively pulsating the pressure control solenoid valves in a cycle; and a quick-apply control prohibiting portion to prohibit a provision of a quick-apply control using the quick-apply signal for a second time from a time of termination of the pulsation drive control, and to permit the provision of the quick-apply control after the elapse of the second time, for a valve having undergone the control, the pulsation drive control portion to terminate the control for a valve when the shift request is made.Type: GrantFiled: July 7, 2017Date of Patent: May 14, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shin Kitamura, Hironobu Aratake, Norihiro Tsukamoto, Tomohiro Asami, Hiromasa Takai, Daiki Fukuda
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Patent number: 10161510Abstract: When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.Type: GrantFiled: July 21, 2017Date of Patent: December 25, 2018Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Keisuke Ota, Norihiro Tsukamoto, Tomohiro Chimbe, Ayumu Sagawa, Hiromasa Takai, Masataka Hirano
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Publication number: 20180252311Abstract: A shift control device of a vehicle including an internal combustion engine and a multi-speed transmission in series, the shift control device comprises: a control portion providing a downshift control in which an input shaft rotation speed of the multi-speed transmission is increased through a torque-up of the internal combustion engine toward a post-shift input shaft rotation speed in a neutral state where a release-side engagement device to be released during a downshift of the multi-speed transmission is released, so as to engage an engagement-side engagement device to be engaged after the shift. In the case of a shift pattern having a large internal inertia of the multi-speed transmission, the control portion controls a torque capacity of the engagement-side engagement device to a value greater than zero before starting a torque-up control of the internal combustion engine.Type: ApplicationFiled: March 1, 2018Publication date: September 6, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Norihiro TSUKAMOTO, Tomohiro ASAMI, Hiromasa TAKAI, Masataka HIRANO, Daiki FUKUDA, Takuma SUGINO
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Publication number: 20180031122Abstract: When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.Type: ApplicationFiled: July 21, 2017Publication date: February 1, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Keisuke OTA, Norihiro TSUKAMOTO, Tomohiro CHIMBE, Ayumu SAGAWA, Hiromasa TAKAI, Masataka HIRANO
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Publication number: 20180031125Abstract: An electronic control unit is configured to control a hydraulic pressures of engaging element and disengaging element in accordance with a preset target output shaft torque during a power-on downshift. The electronic control unit is configured to delay a start of decrease in the hydraulic pressure of the disengaging element from a start of a torque phase while maintain the hydraulic pressure of the disengaging element at the start of the torque phase. The electronic control unit is configured to start decreasing the hydraulic pressure of the disengaging element when the electronic control unit determines that overspeed of an input shaft is occurring during the torque phase and a predetermined condition is established.Type: ApplicationFiled: July 25, 2017Publication date: February 1, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiro CHIMBE, Norihiro TSUKAMOTO, Keisuke OTA, Tomohiro ASAMI, Hiromasa TAKAI, Daiki FUKUDA
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Publication number: 20180031055Abstract: A vehicle control device including a multi-speed transmission switching gear shift positions in accordance with a combination of hydraulic friction engagement devices operations and pressure control solenoid valves, the control device shifting gears by providing a shift output signal including a quick-apply signal to the valves after a first time from a shift request, the control device has: a pulsation drive control portion to control selectively pulsating the pressure control solenoid valves in a cycle; and a quick-apply control prohibiting portion to prohibit a provision of a quick-apply control using the quick-apply signal for a second time from a time of termination of the pulsation drive control, and to permit the provision of the quick-apply control after the elapse of the second time, for a valve having undergone the control, the pulsation drive control portion to terminate the control for a valve when the shift request is made.Type: ApplicationFiled: July 7, 2017Publication date: February 1, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shin KITAMURA, Hironobu ARATAKE, Norihiro TSUKAMOTO, Tomohiro ASAMI, Hiromasa TAKAI, Daiki FUKUDA
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Publication number: 20180023690Abstract: A control device of a vehicle including a motor and a multi-speed type automatic transmission including a plurality of engagement devices, the control device engaging the engagement device to be engaged and releasing the engagement device to be released when the shift is determined, and controlling an engagement pressure of an engagement device to be released during an upshift in a driven state and a downshift in a driving state and controlling an engagement pressure of an engagement device to be engaged during an upshift in the driving state and a downshift in the driven state so as to control a rotation speed of a rotating element of the automatic transmission, the control device increasing an instruction pressure of the engagement device to a target surge pressure for a target surge time when switching is performed during the upshift and the downshift in the driven state, to the driving state.Type: ApplicationFiled: July 19, 2017Publication date: January 25, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Norihiro TSUKAMOTO, Tomohiro ASAMI, Keisuke OTA, Hiromasa TAKAI
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Patent number: 8521381Abstract: A device with a stepped automatic transmission to transfer power from a power source to an axle using changeable shift speeds includes an input-side fluid transmission element connected to the power source, an output-side fluid transmission element connected to the transmission input shaft, a lock-up clutch engaging and disengaging the input-side and the output-side fluid transmission elements; a unit adjusting the lock-up clutch; a unit setting, when a downshift is to be performed in response to a predetermined request for a large drive force, a predetermined target slip speed value larger than a non-shifting-time value before a rotational speed of the power source exceeds a input shaft rotational speed after the downshift, and setting the target slip speed to decrease toward the non-shifting-time value along with lapse of time after the power source rotational speed source exceeds the post-shifting input shaft speed; and a unit controlling the engagement force so the slip speed becomes the set target slip sType: GrantFiled: December 20, 2010Date of Patent: August 27, 2013Assignee: Aisin AW Co., Ltd.Inventors: Yasuhiro Fujiwara, Hiromasa Takai, Masatake Ichikawa, Yutaka Teraoka, Hiroshi Tsutsui
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Publication number: 20110246034Abstract: A device with a stepped automatic transmission to transfer power from a power source to an axle using changeable shift speeds includes an input-side fluid transmission element connected to the power source, an output-side fluid transmission element connected to the transmission input shaft, a lock-up clutch engaging and disengaging the input-side and the output-side fluid transmission elements; a unit adjusting the lock-up clutch; a unit setting, when a downshift is to be performed in response to a predetermined request for a large drive force, a predetermined target slip speed value larger than a non-shifting-time value before a rotational speed of the power source exceeds a input shaft rotational speed after the downshift, and setting the target slip speed to decrease toward the non-shifting-time value along with lapse of time after the power source rotational speed source exceeds the post-shifting input shaft speed; and a unit controlling the engagement force so the slip speed becomes the set target slip sType: ApplicationFiled: December 20, 2010Publication date: October 6, 2011Applicant: AISIN AW CO., LTD.Inventors: Yasuhiro FUJIWARA, Hiromasa Takai, Masatake Ichikawa, Yutaka Teraoka, Hiroshi Tsutsui