Patents by Inventor Kazumi Hoshiya
Kazumi Hoshiya 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: 20160304124Abstract: A vehicle control system is provided to propel a vehicle in a stabilized manner when switching an operating mode from an autonomous mode to a manual mode. The vehicle control system is configured to: control an operating condition of the vehicle; determine an execution of steering operation by the driver; and continue the autonomous control of the steering wheel if the steering wheel cannot be operated by the driver when the autonomous control of the vehicle is interrupted by a manual operation of a driver and hence the operating mode is switched from the autonomous mode to the manual mode.Type: ApplicationFiled: April 7, 2016Publication date: October 20, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tadashi FUJIYOSHI, Kazumi HOSHIYA, Yoshio ITO, Norimi ASAHARA, Seiji KUWAHARA, Takahito ENDO, Kazuya ARAKAWA
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Publication number: 20160297444Abstract: A vehicle control system is provided to improve energy efficiency of a vehicle that can be operated not only manually but also autonomously. The vehicle control system is configured to deliver oil to an oil requiring site in a first feeding amount under the manual mode, and to deliver oil to the oil requiring site in a second feeding amount that is smaller than the first feeding amount during propulsion under the autonomous mode in line with a travel plan. When a required amount of oil delivered to the oil requiring site is expected to be increased based on the travel plan under the autonomous mode, the controller increases an oil feeding amount to the oil requiring site from the second feeding amount.Type: ApplicationFiled: April 6, 2016Publication date: October 13, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takahito ENDO, Kazumi HOSHIYA, Yoshio ITO, Norimi ASAHARA, Seiji KUWAHARA, Tadashi FUJIYOSHI, Yuji IWASE
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Publication number: 20160298758Abstract: A vehicle control system to prevent a vehicle stopped in the autonomous mode from being started undesirably is provided. The vehicle control system is configured to select an operating mode from an autonomous mode and a manual mode, and to select a drive range from a drivable range and a non-drivable range. A controller is configured to detect a fact that a door is opened, that a door lock is unlocked, or that a seatbelt is unfastened. If at least any of those facts is detected, the controller shifts the drive range to the non-drivable range or shifts the operating mode to the manual mode.Type: ApplicationFiled: April 6, 2016Publication date: October 13, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tadashi FUJIYOSHI, Kazumi HOSHIYA, Yoshio ITO, Norimi ASAHARA, Seiji KUWAHARA, Takahito ENDO, Kazuya ARAKAWA
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Patent number: 7806790Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a ratio between a speed of rotation of an input member and a speed of rotation of an output member is provided. The slippage detection system calculates a correlation coefficient relating to the input rotation speed and the output rotation speed, based on a plurality of measurement values of the input rotation speed and a plurality of measurement values of the output rotation speed, and determines slippage of the torque transmitting member in the continuously variable transmission based on the calculated correlation coefficient.Type: GrantFiled: September 30, 2002Date of Patent: October 5, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kunihiro Iwatsuki, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasunori Nakawaki, Masataka Osawa, Hiroyuki Nishizawa, Hiroyuki Yamaguchi, Hideyuki Suzuki
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Publication number: 20100197455Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a gear ratio between an input rotation speed of an input member and an output rotation speed of an output member is provided. The slippage detection system calculate a sum of differences between an actual gear ratio calculated from measurement values of the input rotation speed and the output rotation speed and a target gear ratio over a predetermined period of time, and determines slippage in the continuously variable transmission based on the sum of differences.Type: ApplicationFiled: April 16, 2010Publication date: August 5, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Kunihiro Iwatsuki, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasunori Nakawaki, Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa
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Publication number: 20100197454Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a gear ratio between an input rotation speed of an input member and an output rotation speed of an output member is provided. The slippage detection system compares a difference between an actual gear ratio calculated from measurement values of the input rotation speed and the output rotation speed and a target gear ratio with a predetermined reference value, and determines slippage in the continuously variable transmission when the difference exceeds the reference value at least a predetermined number of times in a predetermined period of time.Type: ApplicationFiled: April 16, 2010Publication date: August 5, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Kunihiro IWATSUKI, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasunori Nakawaki, Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa
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Patent number: 7666110Abstract: A control system of a power transmission mechanism, in which a transmission torque capacity between transmission members varies according to a pressure to be applied to the transmission members and in which the pressure to be applied to the transmission members is controlled on the basis of such a slip condition between the transmission members as accompanies the lowering of the pressure. The control system comprises: a pressure lowering device for lowering the pressure by a preset value; and a pressure setter for setting the pressure, in case the slip between the transmission members is not detected even by lowering the pressure by a preset value with the pressure lowering device, on the basis of the lowered minimum value of the pressure.Type: GrantFiled: March 11, 2004Date of Patent: February 23, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kunihiro Iwatsuki, Yasunori Nakawaki, Yasuhiro Oshiumi, Kazumi Hoshiya, Takayuki Amaya
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Patent number: 7207404Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: GrantFiled: October 25, 2004Date of Patent: April 24, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Patent number: 7188717Abstract: A control apparatus for a power train including a continuously variable transmission and a clutch arranged in series with the continuously variable transmission is provided in which an engaging pressure of the clutch is first reduced until a slip occurs, and is then increased after detection of the slip so as to re-engage the clutch, and an engaging pressure of the clutch to be established is calculated by giving an excess pressure to the engaging pressure at which the clutch is re-engaged, such that an excess amount of the transmitted torque of the clutch is set smaller than that of the continuously variable transmission. The control apparatus is adapted to determine a learned value as a correction value of the engaging pressure that is set in advance in accordance with an input torque applied to the clutch, based on the engaging pressure calculated by giving the excess pressure to the engaging pressure at which the clutch is re-engaged.Type: GrantFiled: April 27, 2005Date of Patent: March 13, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazumi Hoshiya, Yasunori Nakawaki, Kunihiro Iwatsuki, Yasuhiro Oshiumi
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Patent number: 7168515Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward motor drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: GrantFiled: December 7, 2005Date of Patent: January 30, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Patent number: 7165638Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: GrantFiled: December 7, 2005Date of Patent: January 23, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Publication number: 20060183581Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a ratio between a speed of rotation of an input member and a speed of rotation of an output member is provided. The slippage detection system calculates a correlation coefficient relating to the input rotation speed and the output rotation speed, based on a plurality of measurement values of the input rotation speed and a plurality of measurement values of the output rotation speed, and determines slippage of the torque transmitting member in the continuously variable transmission based on the calculated correlation coefficient.Type: ApplicationFiled: September 30, 2002Publication date: August 17, 2006Inventors: Kunihiro Iwatsuki, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasuhiro Oshiumi, Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa
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Publication number: 20060090940Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward motor drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: ApplicationFiled: December 7, 2005Publication date: May 4, 2006Inventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Publication number: 20060086545Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: ApplicationFiled: December 7, 2005Publication date: April 27, 2006Inventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Patent number: 6994177Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: GrantFiled: October 1, 2003Date of Patent: February 7, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Patent number: 6974009Abstract: A control apparatus for a power train including a continuously variable transmission and a clutch arranged in series with the continuously variable transmission is provided in which an engaging pressure of the clutch is first reduced until a slip occurs, and is then increased after detection of the slip so as to re-engage the clutch, and an engaging pressure of the clutch to be established is calculated by giving an excess pressure to the engaging pressure at which the clutch is re-engaged, such that an excess amount of the transmitted torque of the clutch is set smaller than that of the continuously variable transmission. The control apparatus is adapted to determine a learned value as a correction value of the engaging pressure that is set in advance in accordance with an input torque applied to the clutch, based on the engaging pressure calculated by giving the excess pressure to the engaging pressure at which the clutch is re-engaged.Type: GrantFiled: February 3, 2003Date of Patent: December 13, 2005Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazumi Hoshiya, Yasunori Nakawaki, Kunihiro Iwatsuki, Yasuhiro Oshiumi
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Publication number: 20050197233Abstract: A control apparatus for a power train including a continuously variable transmission and a clutch arranged in series with the continuously variable transmission is provided in which an engaging pressure of the clutch is first reduced until a slip occurs, and is then increased after detection of the slip so as to re-engage the clutch, and an engaging pressure of the clutch to be established is calculated by giving an excess pressure to the engaging pressure at which the clutch is re-engaged, such that an excess amount of the transmitted torque of the clutch is set smaller than that of the continuously variable transmission. The control apparatus is adapted to determine a learned value as a correction value of the engaging pressure that is set in advance in accordance with an input torque applied to the clutch, based on the engaging pressure calculated by giving the excess pressure to the engaging pressure at which the clutch is re-engaged.Type: ApplicationFiled: April 27, 2005Publication date: September 8, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazumi Hoshiya, Yasunori Nakawaki, Kunihiro Iwatsuki, Yasuhiro Oshiumi
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Publication number: 20050082098Abstract: A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed hasType: ApplicationFiled: October 25, 2004Publication date: April 21, 2005Inventors: Masatoshi Ito, Hidehiro Oba, Hiroatsu Endo, Kazumi Hoshiya
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Publication number: 20040242370Abstract: A control system of a power transmission mechanism, in which a transmission torque capacity between transmission members varies according to a pressure to be applied to the transmission members and in which the pressure to be applied to the transmission members is controlled on the basis of such a slip condition between the transmission members as accompanies the lowering of the pressure. The control system comprises: a pressure lowering device for lowering the pressure by a preset value; and a pressure setter for setting the pressure, in case the slip between the transmission members is not detected even by lowering the pressure by a preset value with the pressure lowering device, on the basis of the lowered minimum value of the pressure.Type: ApplicationFiled: March 11, 2004Publication date: December 2, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kunihiro Iwatsuki, Yasunori Nakawaki, Yasuhiro Oshiumi, Kazumi Hoshiya, Takayuki Amaya
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Patent number: 6736753Abstract: Methods and apparatus for a vehicle drive control apparatus changes in the transfer torque capacity of a power transfer device according to various states of operation with respect to at least one drive power source. The vehicle drive control apparatus includes a power transfer device that has a variable transfer torque capacity and the drive power sources that rotate a drive wheel via the power transfer device. A controller is included that causes a vehicle to selectively run in a variety of run modes that differ in states of operation with respect to at least one of the drive power sources. The controller changes the transfer torque capacity of the power transfer device in accordance with the various run modes. According to the vehicle drive control apparatus, a target oil pressure is raised by a predetermined amount when the mode of run is change, or when the vehicle descends in a direction opposite to a vehicle starting direction at the time of a hill climb start.Type: GrantFiled: April 18, 2002Date of Patent: May 18, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroatsu Endo, Tatsuya Ozeki, Kazumi Hoshiya