Patents by Inventor Takeshi Hirata
Takeshi Hirata 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: 20180067413Abstract: A toner configured to produce less odor in printing and to have excellent charge stability. Disclosed is a toner comprising polymer particles obtained by polymerizing a polymerizable monomer and an external additive attached to a surface of the polymer particles, wherein a volatilization amount a of an alkylthiol with a molecular weight of 110 or more and less than 150 with respect to the toner, which is quantitated at a volatilization temperature of 160° C. in purge & trap/gas chromatography measurement A, is 1 mass ppm or less, and a volatilization amount b of the alkylthiol with respect to the toner, which is quantitated at a volatilization temperature of 220° C. in purge & trap/gas chromatography measurement B, is 30 mass ppm or more and 1,000 mass ppm or less.Type: ApplicationFiled: February 9, 2016Publication date: March 8, 2018Applicant: ZEON CORPORATIONInventors: Takeshi Hirata, Hiroyuki Taguchi
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Patent number: 9205748Abstract: A regenerative braking control device for a vehicle includes: a driver request braking torque computation unit configured to compute a driver request braking torque based on brake pedaling of a driver; and a regenerative braking torque computation unit configured to compute a regenerative braking torque by restricting a response time of the regenerative braking torque to match a braking rate of a frictional brake based on a vehicle speed and the computed driver request braking torque, and compute the regenerative braking torque by releasing restriction on the response time of the regenerative braking torque in a case where the driver request braking torque decreases.Type: GrantFiled: October 20, 2011Date of Patent: December 8, 2015Assignee: NISSAN MOTOR CO., LTD.Inventor: Takeshi Hirata
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Patent number: 8874299Abstract: A vehicle control system of the electrically driven vehicle, wherein the engagement element slip process is carried out for the slipping of the transmission engagement element on the basis of the detection by the detecting section; and the control system has a clutch torque control section that is programmed to work as follows: during the engagement element slip process, the target motor/generator torque, which is increased from the drive torque of the motor/generator by a clutch slip accelerating torque portion for accelerating the slipping of the drive transmission engagement element for the drive torque of the motor/generator, is output from the motor/generator. In addition, when the preset slip accelerating torque suppression condition is met, the torque control for decreasing the drive torque of the motor/generator is carried out.Type: GrantFiled: October 21, 2011Date of Patent: October 28, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Takeshi Hirata, Kaori Tanishima
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Publication number: 20130238208Abstract: A regenerative braking control device for a vehicle includes: a driver request braking torque computation unit configured to compute a driver request braking torque based on brake pedaling of a driver; and a regenerative braking torque computation unit configured to compute a regenerative braking torque by restricting a response time of the regenerative braking torque to match a braking rate of a frictional brake based on a vehicle speed and the computed driver request braking torque, and compute the regenerative braking torque by releasing restriction on the response time of the regenerative braking torque in a case where the driver request braking torque decreases.Type: ApplicationFiled: October 20, 2011Publication date: September 12, 2013Inventor: Takeshi Hirata
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Publication number: 20130231816Abstract: A vehicle control system of the electrically driven vehicle, wherein the engagement element slip process is carried out for the slipping of the transmission engagement element on the basis of the detection by the detecting section; and the control system has a clutch torque control section that is programmed to work as follows: during the engagement element slip process, the target motor/generator torque, which is increased from the drive torque of the motor/generator by a clutch slip accelerating torque portion for accelerating the slipping of the drive transmission engagement element for the drive torque of the motor/generator, is output from the motor/generator. In addition, when the preset slip accelerating torque suppression condition is met, the torque control for decreasing the drive torque of the motor/generator is carried out.Type: ApplicationFiled: October 21, 2011Publication date: September 5, 2013Applicant: Nissan Motor Co.,Ltd.Inventors: Takeshi Hirata, Kaori Tanishima
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Patent number: 8509980Abstract: A hybrid vehicle includes an engine, a motor, the engine and the motor being driving sources, a first traveling mode in which the vehicle is driven utilizing an output of the engine, and a second traveling mode in which the vehicle is driven through an output of the motor with the engine stopped. The hybrid vehicle further includes an air density detecting section configured to detect an air density of an environment under which the vehicle travels and, in a case where the detected air density is reduced with respect to a standard air density, the motor output in the second traveling mode is reduced with respect to the motor output in a standard air density such that a driving force of the vehicle in the second traveling mode when the traveling mode is switched approaches the driving force of the vehicle in the first traveling mode.Type: GrantFiled: October 27, 2010Date of Patent: August 13, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Hiroshi Abe, Takeshi Ohno, Toshio Honda, Takeshi Hirata, Munetoshi Ueno
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Patent number: 8481166Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer obtained by ring-opening polymerization of 2-norbornene. The hydrogenated norbornene ring-open polymer has a weight average molecular weight determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution of 1.5 to 10.0, and a melting point of 110 to 145° C. A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-open polymer obtained by ring-opening copolymerization of 2-norbornene and a substituent-containing norbornene monomer, wherein the proportion of a repeating unit (A) derived from the 2-norbornene with respect to all repeating units is 90 to 99 wt % and the proportion of a repeating unit (B) derived from the substituent-containing norbornene monomer with respect to all repeating units is 1 to 10 wt %. A resin composition and a molding material.Type: GrantFiled: December 23, 2011Date of Patent: July 9, 2013Assignee: Zeon CorporationInventors: Haruhiko Takahashi, Teiji Kohara, Nobuhiro Kudo, Koichi Ikeda, Tokudai Ogawa, Takeshi Hirata
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Patent number: 8315755Abstract: Disclosed herein are embodiments of a drive control apparatus for hybrid vehicles and methods of driving control. In one such embodiment, a drive controller is configured to calculate a basic motor-generator torque value based on the basic engine torque value and the target driving torque value, set a target engine torque to be the basic engine torque value and set a target motor-generator torque as the basic motor-generator torque value when the state of charge of the battery is within an allowable range, set the allowable range of the battery to be smaller when the transmission is performing the shift change operation and execute a basic value shift process when the battery is deviated from the allowable range. The basic value shift process suppresses deviation of the battery by shifting the target engine torque from the basic engine torque value and the target motor-generator torque from the basic motor-generator torque value.Type: GrantFiled: January 5, 2009Date of Patent: November 20, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Takeshi Hirata, Hiroshi Kaneko
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Publication number: 20120208950Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer obtained by ring-opening polymerization of 2-norbornene. The hydrogenated norbornene ring-open polymer has a weight average molecular weight determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution of 1.5 to 10.0, and a melting point of 110 to 145° C. A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-open polymer obtained by ring-opening copolymerization of 2-norbornene and a substituent-containing norbornene monomer, wherein the proportion of a repeating unit (A) derived from the 2-norbornene with respect to all repeating units is 90 to 99 wt % and the proportion of a repeating unit (B) derived from the substituent-containing norbornene monomer with respect to all repeating units is 1 to 10 wt %. A resin composition and a molding material.Type: ApplicationFiled: December 23, 2011Publication date: August 16, 2012Applicant: ZEON CORPORATIONInventors: Haruhiko Takahashi, Teiji Kohara, Nobuhiro Kudo, Koichi Ikeda, Tokudai Ogawa, Takeshi Hirata
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Publication number: 20120185119Abstract: A hybrid vehicle includes an engine, a motor, the engine and the motor being driving sources, a first traveling mode in which the vehicle is driven utilizing an output of the engine, and a second traveling mode in which the vehicle is driven through an output of the motor with the engine stopped. The hybrid vehicle further includes an air density detecting section configured to detect an air density of an environment under which the vehicle travels and, in a case where the detected air density is reduced with respect to a standard air density, the motor output in the second traveling mode is reduced with respect to the motor output in a standard air density such that a driving force of the vehicle in the second traveling mode when the traveling mode is switched approaches the driving force of the vehicle in the first traveling mode.Type: ApplicationFiled: October 27, 2010Publication date: July 19, 2012Inventors: Hiroshi Abe, Takeshi Ohno, Toshio Honda, Takeshi Hirata, Munetoshi Ueno
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Publication number: 20120171398Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer obtained by ring-opening polymerization of 2-norbornene. The hydrogenated norbornene ring-open polymer has a weight average molecular weight determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution of 1.5 to 10.0, and a melting point of 110 to 145° C. A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-open polymer obtained by ring-opening copolymerization of 2-norbornene and a substituent-containing norbornene monomer, wherein the proportion of a repeating unit (A) derived from the 2-norbornene with respect to all repeating units is 90 to 99 wt % and the proportion of a repeating unit (B) derived from the substituent-containing norbornene monomer with respect to all repeating units is 1 to 10 wt %. A resin composition and a molding material.Type: ApplicationFiled: December 23, 2011Publication date: July 5, 2012Applicant: ZEON CORPORATIONInventors: Haruhiko TAKAHASHI, Teiji KOHARA, Nobuhiro KUDO, Koichi IKEDA, Tokudai OGAWA, Takeshi HIRATA
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Publication number: 20120164465Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer obtained by ring-opening polymerization of 2-norbornene. The hydrogenated norbornene ring-open polymer has a weight average molecular weight determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution of 1.5 to 10.0, and a melting point of 110 to 145° C. A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-open polymer obtained by ring-opening copolymerization of 2-norbornene and a substituent-containing norbornene monomer, wherein the proportion of a repeating unit (A) derived from the 2-norbornene with respect to all repeating units is 90 to 99 wt % and the proportion of a repeating unit (B) derived from the substituent-containing norbornene monomer with respect to all repeating units is 1 to 10 wt %. A resin composition and a molding material.Type: ApplicationFiled: December 23, 2011Publication date: June 28, 2012Applicant: ZEON CORPORATIONInventors: Haruhiko Takahashi, Teiji Kohara, Nobuhiro Kudo, Koichi Ikeda, Tokudai Ogawa, Takeshi Hirata
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Publication number: 20120165461Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer obtained by ring-opening polymerization of 2-norbornene. The hydrogenated norbornene ring-open polymer has a weight average molecular weight determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution of 1.5 to 10.0, and a melting point of 110 to 145° C. A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-open polymer obtained by ring-opening copolymerization of 2-norbornene and a substituent-containing norbornene monomer, wherein the proportion of a repeating unit (A) derived from the 2-norbornene with respect to all repeating units is 90 to 99 wt % and the proportion of a repeating unit (B) derived from the substituent-containing norbornene monomer with respect to all repeating units is 1 to 10 wt %. A resin composition and a molding material.Type: ApplicationFiled: December 23, 2011Publication date: June 28, 2012Applicant: ZEON CORPORATIONInventors: Haruhiko TAKAHASHI, Teiji KOHARA, Nobuhiro Kudo, Koichi Ikeda, Tokudai Ogawa, Takeshi Hirata
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Publication number: 20110313602Abstract: Disclosed herein are embodiments of a drive control apparatus for hybrid vehicles and methods of driving control. In one such embodiment, a drive controller is configured to calculate a basic motor-generator torque value based on the basic engine torque value and the target driving torque value, set a target engine torque to be the basic engine torque value and set a target motor-generator torque as the basic motor-generator torque value when the state of charge of the battery is within an allowable range, set the allowable range of the battery to be smaller when the transmission is performing the shift change operation and execute a basic value shift process when the battery is deviated from the allowable range. The basic value shift process suppresses deviation of the battery by shifting the target engine torque from the basic engine torque value and the target motor-generator torque from the basic motor-generator torque value.Type: ApplicationFiled: January 5, 2009Publication date: December 22, 2011Applicant: NISSAN MOTOR CO., LTD.Inventors: Takeshi Hirata, Hiroshi Kaneko
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Patent number: 8053531Abstract: A hydrogenated crystalline norbornene ring-opening polymer is obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-opening polymer that is obtained by ring-opening polymerization of norbornene monomers including 90 to 100 wt % of 2-norbornene and 0 to 10 wt % of a 2-norbornene derivative having a substituent which does not include an aliphatic carbon-carbon double bond in the presence of a branching agent, the hydrogenated crystalline norbornene ring-opening polymer having a melting point of 110 to 145° C. and a branching index of 0.3 to 0.98, and a molded article is obtained by molding the hydrogenated crystalline norbornene ring-opening polymer. The hydrogenated crystalline norbornene ring-opening polymer has excellent industrial productivity, and the molded article has excellent productivity and moisture resistance.Type: GrantFiled: February 27, 2009Date of Patent: November 8, 2011Assignee: Zeon CorporationInventors: Takeshi Hirata, Takashi Houkawa, Hiroaki Matsuda, Yosuke Naka
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Patent number: 8016367Abstract: An apparatus and method for controlling a braking-force distribution in a vehicle collision is used in a vehicle including at least one electric storage device and at least one motor-generator for driving and braking. When the vehicle decelerates or stops in response to a brake operation, regenerative cooperative brake control is performed in which a braking force of a frictional brake is reduced or eliminated while a braking force of a regenerative brake applied by the motor-generator is increased by an amount corresponding to the reduction in the braking force of the friction brake. When the vehicle collides, the apparatus reduces the braking force of the regenerative brake applied by the motor-generator and increases the braking force of the friction brake.Type: GrantFiled: March 15, 2007Date of Patent: September 13, 2011Assignee: Nissan Motor Co., Ltd.Inventor: Takeshi Hirata
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Patent number: 7885737Abstract: A hybrid vehicle control system for cutting off fuel to an internal combustion engine of hybrid vehicle while providing smooth transitions from a hybrid drive mode to an electric drive mode is provided. The hybrid vehicle control system includes an integrated controller configured to receive inputs corresponding to vehicle speed and an indicated driving force, and to select an appropriate mode transition pattern from a group of mode transition patters according to the change in indicated driving force.Type: GrantFiled: December 20, 2006Date of Patent: February 8, 2011Assignee: Nissan Motor Co., Ltd.Inventors: Takeshi Hirata, Tsuyoshi Yamanaka, Hiroshi Kaneko
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Publication number: 20110021731Abstract: A hydrogenated crystalline norbornene ring-opening polymer is obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-opening polymer that is obtained by ring-opening polymerization of norbornene monomers including 90 to 100 wt % of 2-norbornene and 0 to 10 wt % of a 2-norbornene derivative having a substituent which does not include an aliphatic carbon-carbon double bond in the presence of a branching agent, the hydrogenated crystalline norbornene ring-opening polymer having a melting point of 110 to 145° C. and a branching index of 0.3 to 0.98, and a molded article is obtained by molding the hydrogenated crystalline norbornene ring-opening polymer. The hydrogenated crystalline norbornene ring-opening polymer has excellent industrial productivity, and the molded article has excellent productivity and moisture resistance.Type: ApplicationFiled: February 27, 2009Publication date: January 27, 2011Applicant: ZEON CORPORATIONInventors: Takeshi Hirata, Takashi Houkawa, Hiroaki Matsuda, Yosuke Naka
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Patent number: 7708095Abstract: A control apparatus and method for a hybrid vehicle having a first engagement element between an engine and a motor-generator and a second engagement element between the motor-generator and a drive wheel. During EV drive mode, the first engagement element disengages and the second engagement element engages to drive the vehicle using the motor-generator. During HEV drive mode, the first and second engagement elements engage to drive the vehicle using both power sources. During a third drive mode, the first engagement element engages and the second engagement element slip-engages to drive the vehicle by both power sources. When a detected temperature of the second engagement element is too high during low-speed driving, the EV drive mode is selected to enhance durability of the second engagement element.Type: GrantFiled: May 23, 2007Date of Patent: May 4, 2010Assignee: Nissan Motor Co., LtdInventor: Takeshi Hirata
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Publication number: 20100076396Abstract: A hydrogenated norbornene ring-open polymer obtained by hydrogenating 80% or more of main-chain carbon-carbon double bonds of a ring-open polymer which is obtained by ring-opening polymerization of 2-norbornene is disclosed. The hydrogenated norbornene ring-open polymer has a weight average molecular weight (Mw) determined by gel permeation chromatography (GPC) of 50,000 to 200,000, a molecular weight distribution (Mw/Mn) of 1.5 to 10.0, and a melting point of 110 to 145° C.Type: ApplicationFiled: August 31, 2007Publication date: March 25, 2010Applicant: ZEON CORPORATIONInventors: Haruhiko Takahashi, Teiji Kohara, Nobuhiro Kudo, Koichi Ikeda, Tokudai Ogawa, Takeshi Hirata