Patents by Inventor Takeshi Aso
Takeshi Aso 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: 11649728Abstract: In a turbine designing and manufacturing method attendant on a material change of a rotor disk of a turbine rotor, a temperature rise time ratio is determined which is a desired ratio of a temperature rise time of the temperature of the rotor disk from a first temperature to a second temperature after the material change to the temperature rise time before the material change. An inter-surface distance between surfaces on upstream and downstream sides of the rotor disk after the material change is determined, and a shape of the rotor disk after the material change is determined based on the inter-surface distance. The turbine is designed based on the determined shape of the rotor disk. After the material change in the shape determined in the designing process, the rotor disk and the turbine are manufactured based on the result of the designing process.Type: GrantFiled: August 30, 2021Date of Patent: May 16, 2023Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takeshi Aso, Hironori Tsukidate, Atsushi Sano
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Publication number: 20220098983Abstract: In a turbine designing method attendant on a material change of a rotor disk of a turbine rotor, let a time require for a temperature of the rotor disk to reach from a first temperature to a second temperature at the time of starting of a turbine be temperature rise time, and let a distance between surfaces on an upstream side and a downstream side of the rotor disk be inter-surface distance, then the turbine designing method includes: determining a temperature rise time ratio that is a desired ratio of the temperature rise time after the material change to the temperature rise time before the material change, determining the inter-surface distance after the material change on the basis of the determined temperature rise time, determining a shape of the rotor disk after the material change on the basis of the determined inter-surface distance, and designing the turbine while reflecting the determined shape of the rotor disk on the turbine rotor.Type: ApplicationFiled: August 30, 2021Publication date: March 31, 2022Inventors: Takeshi ASO, Hironori TSUKIDATE, Atsushi SANO
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Patent number: 8831866Abstract: A vehicle includes a fuel tank, a fuel amount detecting device and a control device. The fuel amount detecting device is configured to detect an amount of fuel inside the fuel tank. The control device is configured to calculate an estimated refueling amount that diminishes fuel inside the fuel tank from degrading based on a usage history of the vehicle. The control device is further configured such that the control device stops refueling based on an amount of fuel detected by the fuel amount detecting device and the estimated refueling amount.Type: GrantFiled: August 29, 2011Date of Patent: September 9, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Yuzo Nakano, Takeshi Aso
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Publication number: 20130144519Abstract: A vehicle includes a fuel tank, a fuel amount detecting device and a control device. The fuel amount detecting device is configured to detect an amount of fuel inside the fuel tank. The control device is configured to calculate an estimated refueling amount that diminishes fuel inside the fuel tank from degrading based on a usage history of the vehicle. The control device is further configured such that the control device stops refueling based on an amount of fuel detected by the fuel amount detecting device and the estimated refueling amount.Type: ApplicationFiled: August 29, 2011Publication date: June 6, 2013Applicant: NISSAN MOTOR CO., LTD.Inventors: Yuzo Nakano, Takeshi Aso
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Patent number: 7833669Abstract: An energy supply (ES) is formed by a fuel cell (1), a power distributor (4) connected to the fuel cell (1), and a secondary cell (7) connected to the power distributor (4), a whole load set (WL) is connected to the power distributor (4), and a controller (8) controls the power distributor (4) to warm the energy supply (ES) by alternatively repeating a power charging distribution (S61) in which power (Gm) generated at the fuel cell (1) is distributed to the secondary cell (7) and the load set (WL), and a power discharging distribution (S71) in which a sum of power (Gr) generated at the fuels cell (1) and power (Dp) discharged from the secondary cell (7) is distributed to the load set (WL).Type: GrantFiled: March 11, 2004Date of Patent: November 16, 2010Assignee: Nissan Motor Co., Ltd.Inventors: Takeshi Aso, Mitsunori Kumada
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Patent number: 7371476Abstract: A fuel cell system and a related control method are disclosed wherein, during start-up of a fuel cell stack 1, a controller 21 operates a DC/DC converter 13 in a voltage control mode to allow an electric power to be supplied from a secondary battery 7 to a load 6 at an output voltage managed by the DC/DC converter. Under such a condition, an electric power level appearing when a voltage level of the electric power to be supplied from the secondary battery to the load lies at a value greater than an open voltage level of the fuel cell stack 1. Next, the DC/DC converter 13 is operative in an electric power control mode to allow the electric power to be supplied from the secondary battery to the load at a managed electric power output. Then, a level of the electric power to be supplied to the load is detected with the DC/DC converter 13, which permits the electric power to be supplied from the secondary battery to the load at an electric power level less than a resulting detected electric power level.Type: GrantFiled: September 26, 2003Date of Patent: May 13, 2008Assignee: Nissan Motor Co., Ltd.Inventor: Takeshi Aso
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Publication number: 20060088738Abstract: During a normal control (CP) having a fuel supply (3) supplying a fuel (Fg), an air supply (3) supplying an oxidizer (Og), a stack (1) of fuel cells generating power with the fuel and the oxidizer supplied, a battery (7) as a secondary cell operable for power charge and discharge, and a power distributor (4) distributing power from the stack to a main load (5) and operable for distribution of power from the stack to the battery and from the battery to the load, after a startup with the stack and the battery warmed-up, a controller (8) serves for raising a temperature (Ts) of the stack when a possible generation (Gp) of power is reduced and for raising a temperature (Tb) of the battery when a possible charge (Cp) of power or a possible discharge (Dp) of power is reduced, to maintain stable power supply to the load even under a continued low-output condition.Type: ApplicationFiled: May 12, 2004Publication date: April 27, 2006Inventor: Takeshi Aso
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Publication number: 20060040149Abstract: An energy supply (ES) is formed by a fuel cell (1), a power distributor (4) connected to the fuel cell (1), and a secondary cell (7) connected to the power distributor (4), a whole load set (WL) is connected to the power distributor (4), and a controller (8) controls the power distributor (4) to warm the energy supply (ES) by alternatively repeating a power charging distribution (S61) in which power (Gm) generated at the fuel cell (1) is distributed to the secondary cell (7) and the load set (WL), and a power discharging distribution (S71) in which a sum of power (Gr) generated at the fuels cell (1) and power (Dp) discharged from the secondary cell (7) is distributed to the load set (WL).Type: ApplicationFiled: March 11, 2004Publication date: February 23, 2006Inventors: Takeshi Aso, Mitsunori Kumada
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Publication number: 20040076860Abstract: A fuel cell system and a related control method are disclosed wherein, during start-up of a fuel cell stack 1, a controller 21 operates a DC/DC converter 13 in a voltage control mode to allow an electric power to be supplied from a secondary battery 7 to a load 6 at an output voltage managed by the DC/DC converter. Under such a condition, an electric power level appearing when a voltage level of the electric power to be supplied from the secondary battery to the load lies at a value greater than an open voltage level of the fuel cell stack 1. Next, the DC/DC converter 13 is operative in an electric power control mode to allow the electric power to be supplied from the secondary battery to the load at a managed electric power output. Then, a level of the electric power to be supplied to the load is detected with the DC/DC converter 13, which permits the electric power to be supplied from the secondary battery to the load at an electric power level less than a resulting detected electric power level.Type: ApplicationFiled: September 26, 2003Publication date: April 22, 2004Applicant: NISSAN MOTOR CO., LTD.Inventor: Takeshi Aso
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Patent number: 6617864Abstract: A probe whose characteristic impedance can be accurately adjusted to a desired value with the production of a small number of prototypes. The probe includes a first line with a signal terminal to be connected to a signal electrode of a circuit to be measured and at least one first region connected to the signal terminal and to which one end of a chip capacitor is connected, a second line connected to a terminal of the first line and a junction to be connected to a measuring instrument at the remaining terminal, and an impedance matched to a characteristic impedance of the measuring instrument, a ground connector with a ground terminal to be connected to the ground electrode of the circuit to be measured, and at least one second region connected to the ground terminal and on which the remaining terminal of the chip capacitor is mounted in one-to-one correspondence with the first region.Type: GrantFiled: December 20, 2000Date of Patent: September 9, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Inoue, Takayuki Katoh, Takeshi Aso, Naofumi Iwamoto, Takumi Suetsugu
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Patent number: 6470985Abstract: An engine is activated to drive a generator when an electrical output is required. The required electrical output (PO) is searched and the necessary engine output is calculated. The basic driving point (NO, TO) which obtains maximum fuel efficiency is set at that output (S101-S105). The load of the generator is controlled so as to reach the set basic driving point. When the catalyst temperature is lower than a set value, while maintaining the required electrical output, the basic driving point is varied to a driving point (Ncold, Tcold) which will raise the exhaust gas temperature (S106-108). Furthermore when the temperature of the peripheral engine components in the engine room is higher than a set value, while maintaining the required electrical output, the driving point is varied to a driving point (Nheat, Theat) which will lower the exhaust gas temperature (S109-S111). Hence while maintaining the electrical output, it is possible satisfy each component temperature condition.Type: GrantFiled: September 4, 1998Date of Patent: October 29, 2002Assignee: Nissan Motor Co., Ltd.Inventors: Eiji Inada, Shinichiro Kitada, Toshio Kikuchi, Hiroyuki Hirano, Takeshi Aso, Ryuichi Idoguchi, Yutaro Kaneko
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Publication number: 20010017549Abstract: Provided is a probe whose characteristic impedance can be accurately adjusted to the desired value with the production of a small number of prototypes.Type: ApplicationFiled: December 20, 2000Publication date: August 30, 2001Inventors: Akira Inoue, Takayuki Katoh, Takeshi Aso, Naofumi Iwamoto, Takumi Suetsugu
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Patent number: 6215198Abstract: A generating control device for a hybrid vehicle includes a motor 13 for driving the hybrid vehicle, a battery 12 for driving the motor, a generator 11 for supplying the motor 13 and the battery 12 with electricity, an engine 10 for driving the generator 11 and a control unit 16. In operation, the unit 16 operates to change the operations of the generator 11 and the engine 10 in both of the normal generating mode and the battery protection mode. Therefore, it is possible to reduce the deterioration of the battery 12 of the hybrid vehicle and to ensure the fine driving performance.Type: GrantFiled: June 25, 1997Date of Patent: April 10, 2001Assignee: Nissan Motor Co., Ltd.Inventors: Eiji Inada, Shinichirou Kitada, Toshio Kikuchi, Hiroyuki Hirano, Takeshi Aso, Yuutarou Kaneko
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Patent number: 5962927Abstract: By calculating a fuel vapor quantity in a fuel tank based on a fuel temperature and a fuel residual quantity in the fuel tank, then calculating a fuel vapor purge quantity based on an engine revolution number and engine torque when an engine is driven, and then estimating a fuel vapor quantity captured in a vapor capturing unit based on the fuel vapor quantity and the fuel vapor purge quantity, the engine can be driven to purge the fuel vapor to the engine before the fuel vapor overflows the vapor capturing unit to thus be discharged into the air.Type: GrantFiled: October 22, 1997Date of Patent: October 5, 1999Assignee: Nissan Motor., LTD.Inventors: Eiji Inada, Shinichirou Kitada, Toshio Kikuchi, Hiroyuki Hirano, Ryuichi Idoguchi, Takeshi Aso, Yuutarou Kaneko
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Patent number: 5945959Abstract: An antenna device including a radiating conductor film having two ends adjacent to each other and connecting the two ends in a loop-like shape, formed on an upper face of a dielectric base body in a rectangular parallelepiped shape having the upper face and a lower face in a square shape in parallel with each other, a grounding conductor film extending in a planar shape formed on the lower face of the dielectric base body, and feeding conductor films and respectively connected to the two ends of the radiating conductor film 12. The feeding conductor films extend in the up and down direction in parallel with each other one of which is connected to the grounding conductor film, are formed on a side face of the dielectric base body 11. The antenna device has high directivity and efficiently transmits and receives electromagnetic waves used in communication.Type: GrantFiled: September 12, 1997Date of Patent: August 31, 1999Assignee: Mitsubishi Materials CorporationInventors: Hiroaki Tanidokoro, Takeshi Aso, Naohisa Goto
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Patent number: 5945808Abstract: A hybrid electric vehicle comprises an electric motor, a battery pack for the electric motor, a generator driven by an engine to provide electric power used for charging the battery pack, and a battery management for the battery pack. The battery management determines a current value of battery temperature (BT) of the battery pack and a current value of state of charge (SOC) within the battery pack. What are stored are a first set of varying SOC values and a second set of varying SOC values against varying BT values. The first set of varying SOC values are minimum SOC values required for the battery pack to produce a constant electric power output at varying BT values. The second set of varying SOC values are each indicative of an allowable upper limit to the quantity of electric charge that will accumulate in the battery pack due to operation of charging the battery pack with a constant electric power input at a corresponding BT value.Type: GrantFiled: April 16, 1998Date of Patent: August 31, 1999Assignee: Nissan Motor Co., Ltd.Inventors: Toshio Kikuchi, Shinichiro Kitada, Hiroyuki Hirano, Eiji Inada, Takeshi Aso, Ryuichi Idoguchi, Yutaro Kaneko
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Patent number: 5656911Abstract: A driving device controls a permanent-magnet synchronous motor having a permanent magnet in its rotor using a voltage-type inverter supplying drive power for the synchronous motor, makes the torque of the synchronous motor and the d-axis current flowing in the synchronous motor in the direction of the magnetic flux generated by the permanent magnet approach their own command values, and performs weakening field control by decreasing the d-axis current. To perform the above described control without complicated d-axis current command value operations or temperature amendments to motor constants, the driving device includes a proportional controller for outputting a d-axis signal proportional to the deviation between a d-axis current detection value and a d-axis current command value for the motor.Type: GrantFiled: December 20, 1995Date of Patent: August 12, 1997Assignees: Fuji Electric Company, Nissan Motor CompanyInventors: Tomoharu Nakayama, Koetsu Fujita, Shigenori Kinoshita, Takao Yanase, Masahiko Hanazawa, Shinichiro Kitada, Toshio Kikuchi, Takeshi Aso