Patents by Inventor Toshikazu Tanaka
Toshikazu Tanaka 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).
-
Patent number: 7785424Abstract: Magnetic powder contained in a resin composition for use in injection molding is coated with an insulating material, and a soft magnetic green compact or a hard magnetic green compact is insert molded into the resin composition. Increased magnetic flux destiny, reduced size, a simplified shape, and/or increased filling density can be achieved in a core part of an electric instrument.Type: GrantFiled: August 23, 2005Date of Patent: August 31, 2010Assignee: Nippon Kagaku Yakin Co., Ltd.Inventors: Kiyotaka Matsukawa, Kozo Ishihara, Kazuo Ishikawa, Tomohiro Toyoda, Toshikazu Tanaka
-
Patent number: 7765968Abstract: An actuator operation amount setting unit prepares the rotational speed command value for an electric motor such that the phase of an intake valve changes in accordance with the target phase. An electric-motor EDU controls the motor supply electric power such that the electric motor operates in accordance with the rotational speed command value. An overheating determination unit determines whether at least one of the electric motor and the electric-motor EDU needs to be restricted from heating up based on a result of comparison between the information indicating the motor supply electric power and the reference value. A rotational speed command value restriction unit restricts the rotational speed command value provided to the electric-motor EDU to a value within a predetermined range, when it is determined that the at least one of the electric motor and the electric-motor EDU needs to be restricted from heating up.Type: GrantFiled: August 29, 2007Date of Patent: August 3, 2010Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Zenichiro Mashiki, Yasumichi Inoue, Masayoshi Hattori, Noboru Takagi, Haruyuki Urushihata, Masaomi Inoue, Yuuichi Takemura, Toshikazu Tanaka
-
Patent number: 7762222Abstract: A motor current (driving current of motor) is estimated based on a target motor speed, an actual motor speed, and an engine speed. When the estimated motor current exceeds the upper limit value equivalent to a heat generation limiting current, the motor current is restricted by restricting a variation (motor speed F/B amount) in target motor speed outputted to an EDU from an ECU. Thereby, the heat value of motor may not exceed the heat generation limit, and it can be prevented that the coil temperature of motor exceeds an allowable temperature range. A durability deterioration and failure of motor can be prevented.Type: GrantFiled: August 29, 2007Date of Patent: July 27, 2010Assignees: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Patent number: 7599782Abstract: An ECU outputs a signal indicative of a target motor speed calculated based on a deviation between a target camshaft phase and an actual camshaft phase to an EDU. The EDU performs a feedback control of the output current (motor current) of the EDU so that the deviation is decreased, whereby an actual camshaft phase is feedbacked to a target camshaft phase. When the supply voltage of EDU is less than the operation limit voltage established higher than minimum operation assurance voltage, the variation of the target motor speed is restricted. Thereby, the output current of EDU is restricted, and further, when the supply voltage is less than minimum operation assurance voltage, the output current of EDU is intercepted.Type: GrantFiled: August 29, 2007Date of Patent: October 6, 2009Assignees: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Patent number: 7584729Abstract: A motor current (driving current of motor) is estimated based on a target motor speed, an actual motor speed, and an engine speed. When the estimated motor current exceeds the upper limit value equivalent to a heat generation limiting current, the motor current is restricted by restricting a variation (motor speed F/B amount) in target motor speed outputted to an EDU from an ECU. If it is continued that a deviation between the target motor speed and the actual motor speed exceeds a predetermined value, the estimated motor current exceeds this upper limit value and the restricting action of the motor current is continued.Type: GrantFiled: August 29, 2007Date of Patent: September 8, 2009Assignees: DENSO Corporation, Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Patent number: 7412323Abstract: A motor current is estimated based on a target motor speed, an actual motor speed, and an engine speed. When the estimated motor current exceeds a predetermined value equivalent to a heat limiting current value, a variation (motor speed F/B amount) of the target motor speed outputted to an EDU from an ECU is restricted so that the motor current was restricted and heat generation in motor is restricted. In consideration of a deterioration of responsivity of the variable valve timing control due to restriction of the motor current during execution of motor current restriction processing, an existence of the abnormalities of variable valve timing controller is determined based on a deviation of the target camshaft phase and the actual camshaft phase.Type: GrantFiled: August 29, 2007Date of Patent: August 12, 2008Assignees: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Publication number: 20080081702Abstract: A motor current (driving current of motor) is estimated based on a target motor speed, an actual motor speed, and an engine speed. When the estimated motor current exceeds the upper limit value equivalent to a heat generation limiting current, the motor current is restricted by restricting a variation (motor speed F/B amount) in target motor speed outputted to an EDU from an ECU. Thereby, the heat value of motor may not exceed the heat generation limit, and it can be prevented that the coil temperature of motor exceeds an allowable temperature range. A durability deterioration and failure of motor can be prevented.Type: ApplicationFiled: August 29, 2007Publication date: April 3, 2008Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Publication number: 20080071463Abstract: A motor current (driving current of motor) is estimated based on a target motor speed, an actual motor speed, and an engine speed. When the estimated motor current exceeds the upper limit value equivalent to a heat generation limiting current, the motor current is restricted by restricting a variation (motor speed F/B amount) in target motor speed outputted to an EDU from an ECU. If it is continued that a deviation between the target motor speed and the actual motor speed exceeds a predetermined value, the estimated motor current exceeds this upper limit value and the restricting action of the motor current is continued.Type: ApplicationFiled: August 29, 2007Publication date: March 20, 2008Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Publication number: 20080066700Abstract: An actuator operation amount setting unit prepares the rotational speed command value for an electric motor such that the phase of an intake valve changes in accordance with the target phase. An electric-motor EDU controls the motor supply electric power such that the electric motor operates in accordance with the rotational speed command value. An overheating determination unit determines whether at least one of the electric motor and the electric-motor EDU needs to be restricted from heating up based on a result of comparison between the information indicating the motor supply electric power and the reference value. A rotational speed command value restriction unit restricts the rotational speed command value provided to the electric-motor EDU to a value within a predetermined range, when it is determined that the at least one of the electric motor and the electric-motor EDU needs to be restricted from heating up.Type: ApplicationFiled: August 29, 2007Publication date: March 20, 2008Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Zenichiro MASHIKI, Yasumichi INOUE, Masayoshi HATTORI, Noboru TAKAGI, Haruyuki URUSHIHATA, Masaomi INOUE, Yuuichi TAKEMURA, Toshikazu TANAKA
-
Publication number: 20080065307Abstract: An ECU outputs a signal indicative of a target motor speed calculated based on a deviation between a target camshaft phase and an actual camshaft phase to an EDU. The EDU performs a feedback control of the output current (motor current) of the EDU so that the deviation is decreased, whereby an actual camshaft phase is feedbacked to a target camshaft phase. When the supply voltage of EDU is less than the operation limit voltage established higher than minimum operation assurance voltage, the variation of the target motor speed is restricted. Thereby, the output current of EDU is restricted, and further, when the supply voltage is less than minimum operation assurance voltage, the output current of EDU is intercepted.Type: ApplicationFiled: August 29, 2007Publication date: March 13, 2008Applicants: Denso Corporation, Toyota Jidosha KabushikiInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Publication number: 20080065308Abstract: A motor current is estimated based on a target motor speed, an actual motor speed, and an engine speed. When the estimated motor current exceeds a predetermined value equivalent to a heat limiting current value, a variation (motor speed F/B amount) of the target motor speed outputted to an EDU from an ECU is restricted so that the motor current was restricted and heat generation in motor is restricted. In consideration of a deterioration of responsivity of the variable valve timing control due to restriction of the motor current during execution of motor current restriction processing, an existence of the abnormalities of variable valve timing controller is determined based on a deviation of the target camshaft phase and the actual camshaft phase.Type: ApplicationFiled: August 29, 2007Publication date: March 13, 2008Applicants: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Toshikazu Tanaka, Masaomi Inoue, Yuuichi Takemura, Zenichiro Mashiki
-
Publication number: 20080035879Abstract: An aggregate of functional particles includes a plurality of functional particles and an insulating material for covering the plurality of functional particles, and a large number of aggregates of functional particles are filled in a resin. Alternatively, insulating functional particles are added to the plurality of functional particles by an amount less than 50% of that of the functional particles in volume ratio.Type: ApplicationFiled: March 28, 2005Publication date: February 14, 2008Inventors: Kiyotaka Matsukawa, Kozo Ishihara, Kazuhiro Masano, Toshikazu Tanaka
-
Publication number: 20070256759Abstract: Magnetic powder contained in a resin composition for use in injection molding is coated with an insulating material, and a soft magnetic green compact or a hard magnetic green compact is insert molded into the resin composition.Type: ApplicationFiled: August 23, 2005Publication date: November 8, 2007Inventors: Kiyotaka Matsukawa, Kozo Ishihara, Kazuo Ishikawa, Tomohiro Toyoda, Toshikazu Tanaka
-
Patent number: 7171401Abstract: A system such as an accounting system providing highly reliable continuous operation services at low cost. The system is configured to transfer data asynchronously between a main system that operates in daytime mode and a subsystem that operates in nighttime mode. A sub-database receives and stores only data required in transactions performed in nighttime mode from the main system and its main database. The subsystem, which is responsible for performing processes in nighttime mode, transfers a log of transactions performed in nighttime mode to the main system through a subsystem queuing box on returning to the daytime mode and data re-processed by a main processor in the main system is stored in the main database based on the transaction log.Type: GrantFiled: March 19, 2002Date of Patent: January 30, 2007Assignee: International Business Machines CorporationInventor: Toshikazu Tanaka
-
Publication number: 20020143756Abstract: A system such as an accounting system providing highly reliable continuous operation services at low cost. The system is configured to transfer data asynchronously between a main system that operates in daytime mode and a subsystem that operates in nighttime mode. A sub-database receives and stores only data required in transactions performed in nighttime mode from the main system and its main database. The subsystem, which is responsible for performing processes in nighttime mode, transfers a log of transactions performed in nighttime mode to the main system through a subsystem queuing box on returning to the daytime mode and data re-processed by a main processor in the main system is stored in the main database based on the transaction log.Type: ApplicationFiled: March 19, 2002Publication date: October 3, 2002Applicant: International Business Machines CorporationInventor: Toshikazu Tanaka
-
Patent number: 6183875Abstract: An electronic circuit substrate including an aluminum-ceramic composite material having an electronic circuit formed on aluminum or an aluminum alloy plate of the aluminum-ceramic composite material which is prepared directly solidifying molten aluminum or an aluminum alloy on at least a portion of a ceramic substrate.Type: GrantFiled: October 26, 1998Date of Patent: February 6, 2001Assignee: Dowa Mining Co., Ltd.Inventors: Xiao-Shan Ning, Choju Nagata, Masami Sakuraba, Toshikazu Tanaka, Katsuaki Suganuma, Masami Kimura
-
Patent number: 6053272Abstract: An engine mount for a saddle-seat vehicle includes an upper engine mount operatively connected to the engine of the vehicle. The upper engine mount operatively connects the engine to the frame of the vehicle. At least one connector is provided for connecting the engine to the upper engine mount. The upper engine mount permits substantially free vertical movement of the engine relative to the frame. The upper engine mount includes an outer sleeve operatively connected to the frame. The upper engine mount further includes an elastic cushion arranged between the connector and the outer sleeve. The upper engine mount may further include an inner sleeve located within the elastic cushion for passage of the connector therethrough. The upper engine mount further includes a plate bracket operatively connected between the outer sleeve and the frame. The plate bracket may include lightening holes therein for decreasing the weight of the plate bracket while increasing flexibility of the plate bracket.Type: GrantFiled: February 26, 1997Date of Patent: April 25, 2000Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masashi Koyanagi, Yoshihiro Kimura, Toshikazu Tanaka, Toshinari Mohara
-
Patent number: 5965193Abstract: Molten aluminum and a ceramic substrate are held in direct contact with each other and thereafter cooled to have the aluminum joined directly to the ceramic substrate. This method is capable of consistent and easy production of aluminum-ceramics composite substrates having satisfactory joint strength, thermal conductivity and heat resistance characteristics. A ceramic member is fed successively into and through molten metal to directly bond the metal on the ceramic to produce a metal-bonded-ceramic (MBC) material at a low cost. An electronic circuit substrate made of an aluminum ceramic composite material wherein an electronic circuit is formed on an aluminum surface of the aluminum-ceramic composite material. The aluminum-ceramic composite material is made by directly solidifying molten aluminum or an aluminum alloy on at least a portion of a ceramic substrate.Type: GrantFiled: July 29, 1997Date of Patent: October 12, 1999Assignee: Dowa Mining Co., Ltd.Inventors: Xiao-Shan Ning, Choju Nagata, Masami Sakuraba, Toshikazu Tanaka, Katsuaki Suganuma, Masami Kimura
-
Patent number: 5899985Abstract: It is an object of this invention to provide a high-accuracy inference method and an inference system. The input reads fact data into this system. Fact data is stored in a work area, and the inference is started. The inference cycle of the inference is as follows. First, the rule extraction processing module compares rules with data to extract an optimum rule. Then, the case extraction processing module extracts from the case storing a case which matches the extracted rule. Then, the selection processing module compares the condition of the extracted rule with that of the extracted case, and selects one of them which is more similar to the fact data. The execution processing module executes the procedure of the selected rule or case. The inference cycle is repeated unless the executed procedure stops processing.Type: GrantFiled: September 5, 1995Date of Patent: May 4, 1999Assignee: Kabushiki Kaisha ToshibaInventor: Toshikazu Tanaka
-
Patent number: 5353229Abstract: In a system, utilized in, e.g., scheduling, for satisfying constraints by allowing relaxation of constraints, a constraint relaxation necessity detection section detects necessity of constraint relaxation in a problem solving cycle of a problem solving section. When the necessity of constraint relaxation is detected, a relaxation target constraint selection section is enabled to select a constraint to be relaxed from a constraint group. A constraint relaxation section searches a constraint relaxation knowledge management section in association with the selected constraint to check if a partial solution satisfies a relaxation permission condition. If the relaxation permission condition is satisfied, constraint relaxation is attempted according to a relaxation method recorded in correspondence with the relaxation permission condition.Type: GrantFiled: October 30, 1992Date of Patent: October 4, 1994Assignee: Kabushiki Kaisha ToshibaInventor: Toshikazu Tanaka