Patents by Inventor Tadashi Osaka

Tadashi Osaka 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).

  • Publication number: 20150322945
    Abstract: A rotary fluid machine that reduces fluid leakage from a gear pump or gear motor and achieves improvement in responsiveness is provided. The present invention is configured such that force of pressing a side plate toward gears by a seal member provided between the side plate and a case and performing pressure compartment is partly strong, not uniform along the entire length of the seal member. Specifically, for example, a gear pump comprises an assembly including a pair of gears, a side plate sealing a side surface of the gears, and a seal block sealing tooth tips of the gears, a case housing the pump assembly, and a seal member being arranged between the side plate or the seal block and the case and along a notch portion formed in the side plate or the seal block. The seal member is wider at a portion in a position passing through a place with large pressure fluctuations than at other portions.
    Type: Application
    Filed: January 29, 2013
    Publication date: November 12, 2015
    Inventors: Takahiro ITOU, Tadashi OSAKA
  • Patent number: 8973387
    Abstract: A vehicular air conditioning system capable of suppressing the power consumption of a refrigerating cycle is disclosed. The vehicular air conditioning system comprises a refrigerating cycle circuit comprising a compressor, an outside heat exchanger and an inside air conditioning heat exchanger annularly connected in order, and a device cooling circuit comprising a heating unit, an inside cooling heat exchanger, an intermediate heat exchanger and a pump being annularly connected, the intermediate heat exchanger being constructed such that one end of a piping of the cooling medium for air conditioning is connected to a liquid piping, the liquid piping providing connection between the outside heat exchanger and the inside air conditioning heat exchanger, and an opposite end of the piping of the cooling medium for air conditioning is connected to a suction port of the compressor.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: March 10, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Osaka, Hiroaki Matsushima, Sachio Sekiya, Yuto Imanishi
  • Patent number: 8909398
    Abstract: A cooling system of an electric vehicle includes a cooling medium circulation path that circulates a cooling medium to an electrically powered drive unit of a vehicle, a heat exchange unit between the cooling medium and external air, a cooling medium circulation unit, a blower unit that blows air against the heat exchange unit, and a control unit that controls the cooling medium circulation unit and the blower unit, thus controlling cooling of the electrically powered drive unit. The control unit controls the cooling medium circulation unit and the blower unit in a first cooling mode, when a drive force for the vehicle is in a first operational region, and controls in a second cooling mode that provides a higher cooling capability than the first cooling mode, when the drive force for the vehicle is in a second operational region that is higher than the first operational region.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: December 9, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Itsuro Sawada, Tadashi Osaka, Atsushi Yokoyama, Shingo Nasu, Yuto Imanishi, Sachio Sekiya
  • Publication number: 20140311704
    Abstract: A cooling apparatus for a vehicle includes a water cooling system that cools a cooled body by circulating cooling water; and a refrigeration cycle system that cools the cooling water to an outside air temperature or lower utilizing a gas liquid phase change of a refrigerant. The water cooling system includes a first flow passage that causes the cooling water cooled through a radiator radiating heat of the cooling water to outside air to flow through the cooled body; a second flow passage that causes the cooling water cooled to the outside air temperature or lower through an evaporator of the refrigeration cycle system 36 to flow through the cooled body provided at the first flow passage; and flow rate control units that control flow rates of the cooling water flowing in the first flow passage and the second flow passage.
    Type: Application
    Filed: October 24, 2012
    Publication date: October 23, 2014
    Inventors: Atsushi Yokoyama, Tadashi Osaka, Yuki Akiyama, Hideki Miyazaki
  • Patent number: 8839894
    Abstract: An electric drive system for a vehicle includes: an electric drive unit that electrically drives the vehicle; and a cooling unit that cools the electric drive unit, wherein: the electric drive unit and the cooling unit are mounted at a body frame of the vehicle via an elastic support member, the electric drive unit and the cooling unit being configured as an integrated unit.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: September 23, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Yokoyama, Masatsugu Arai, Tadashi Osaka, Itsuro Sawada
  • Publication number: 20140236409
    Abstract: A control system for an electric vehicle includes: an electricity storage device that performs charging and discharging of electrical power; a plurality of load devices that receive supply of electrical power from the electricity storage device and perform operations; and a control device that controls the electricity storage device and the plurality of load devices. And when electrical power is supplied from the electricity storage device to the plurality of load devices, the control device calculates a charge/discharge efficiency of the electricity storage device and a working efficiency of each of the load devices, and regulates an amount of electrical power supplied from the electricity storage device to each of the load devices, so as to enhance an overall efficiency of the electricity storage device and the plurality of load devices.
    Type: Application
    Filed: April 23, 2014
    Publication date: August 21, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Shingo NASU, Atsushi YOKOYAMA, Tadashi OSAKA, Itsuro SAWADA
  • Publication number: 20140174708
    Abstract: A temperature-adjustment system for a vehicle includes temperature-adjustment passages and obtained by circularly connecting a battery, an inverter, a DC/DC converter, a traveling motor, and a pump that circulates the heat medium that adjusts temperatures by cooling/heating the heat generation elements, are provided. The temperature-adjustment passages and are provided with proportional valves that interrupt the flow of the heat medium and adjust the flow volume of the heat medium, an air flow-in part that introduces air into the battery temperature-adjustment passage, and a heat medium discharge part that discharges the heat medium from the temperature-adjustment passage to outside of the vehicle. The proportional valve, air flow-in part, battery, pump, and heat medium discharge part are preferably arranged in that order, and the proportional valve is closed and an air take-in valve and a heat medium discharge valve are opened.
    Type: Application
    Filed: August 17, 2011
    Publication date: June 26, 2014
    Applicant: HITACHI, LTD.
    Inventors: Yuki Akiyama, Tadashi Osaka, Masatsugu Arai
  • Patent number: 8733126
    Abstract: A vehicle air-conditioning apparatus, including: a refrigerant circulation channel that flows a refrigerant, the refrigerant circulation channel provided in a refrigeration cycle system including, as connected in a cyclic pattern, a compressor for the refrigerant, an outdoor heat-exchanger exchanging heat between the refrigerant and an outdoor air, an expansion valve reducing pressure of the refrigerant, and an air-conditioning heat-exchange circuit exchanging heat between the refrigerant and air to be introduced into a vehicle interior; and an equipment heat-exchange circuit connected in parallel to the circuit and exchanging heat between the refrigerant and in-vehicle equipment. The circuit includes a cooling heat-transfer medium circulation channel that circulates a heat-transfer medium for cooling.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: May 27, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Sachio Sekiya, Tadashi Osaka, Itsuro Sawada, Yuto Imanishi
  • Publication number: 20130319029
    Abstract: A vehicle thermal system includes a heat pump system in which a compressor, a first refrigerant switching unit configured to switch a flowing direction of a refrigerant, an outdoor heat exchanger, a first flow rate control unit, a second flow rate control unit, and a heat pump intermediate heat exchanger are connected in order, and which has a bypass circuit including a third flow rate control unit between the first flow rate control unit and the second flow rate control unit, a heat pump indoor heat exchanger, and a second refrigerant switching unit configured to switch between a discharge side of the compressor and an suction side of the compressor. The heat pump system has the refrigerant flowing therein and a heat medium circuit in which a liquid pump, a cooling heat exchanger, a heat medium indoor heat exchanger and a heat medium intermediate heat exchanger are sequentially connected.
    Type: Application
    Filed: February 22, 2011
    Publication date: December 5, 2013
    Applicant: HITACHI, LTD.
    Inventors: Sachio Sekiya, Hiroaki Matsushima, Tadashi Osaka, Yuki Akiyama, Riichi Uchida
  • Publication number: 20130306302
    Abstract: A vehicular air-conditioning system includes: a vehicle interior air-conditioning apparatus which includes a device cooling circuit of a heat generating device mounted in a vehicle, and a refrigeration cycle circuit; and an intermediate heat exchanger for heat exchange between a device cooling medium of the device cooling circuit and an air-conditioning cooling medium of the refrigeration cycle circuit. When a temperature of the cooling medium of the device cooling circuit becomes equal to or higher than a predetermined temperature, a control cycle of the vehicular air-conditioning system is set to a short time, and the predetermined temperature is less than an upper limit temperature of the device cooling medium and is determined from a heat capacity of the device cooling circuit and an amount of heat generated by the heat generating device.
    Type: Application
    Filed: February 21, 2011
    Publication date: November 21, 2013
    Applicant: HITACHI LTD
    Inventors: Tadashi Osaka, Hiroaki Matsushima, Sachio Sekiya, Riichi Uchida, Yuki Akiyama
  • Publication number: 20130299129
    Abstract: A vehicular air conditioning system for saving energy includes: a first indoor cooling heat exchanger for suctioning in and cooling the air within or outside a vehicle; an indoor air conditioning heat exchanger installed on the downstream cooling heat exchanger for regulating the temperature of the applicable air, a refrigeration cycle connected to the applicable indoor air conditioning heat exchanger, a heating element mounted in the vehicle, and a circuit for the machine coolant circulating between the applicable heating element and the applicable first indoor cooling heat exchanger, and in which the air flow path for air flowing into the indoor air conditioning heat exchanger is structured by merging a flow path passing through the first indoor cooling heat exchanger to a flow path not passing through the first indoor cooling heat exchanger, and is also configured to allow switching to either of the two flow paths.
    Type: Application
    Filed: February 21, 2011
    Publication date: November 14, 2013
    Applicant: Hitachi, Ltd.
    Inventors: Tadashi Osaka, Hiroaki Matsushima, Sachio Sekiya, Riichi Uchida, Yuki Akiyama
  • Publication number: 20130118820
    Abstract: An electric drive system for a vehicle includes: an electric drive unit that electrically drives the vehicle; and a cooling unit that cools the electric drive unit, wherein: the electric drive unit and the cooling unit are mounted at a body frame of the vehicle via an elastic support member, the electric drive unit and the cooling unit being configured as an integrated unit.
    Type: Application
    Filed: August 25, 2010
    Publication date: May 16, 2013
    Applicant: Hitachi, Ltd.
    Inventors: Atsushi Yokoyama, Masatsugu Arai, Tadashi Osaka, Itsuro Sawada
  • Publication number: 20120222446
    Abstract: An air-conditioning system for a vehicle includes an air-conditioning apparatus having a compressor 1 that compresses a first refrigerant 40 and a first heat exchanger 2 that exchanges heat between the first refrigerant 40 and external air and performing temperature regulation; and an equipment cooling apparatus that circulates a second refrigerant 41B between equipment 53, 54, 55 for electrically driving the vehicle and a second heat exchanger 7B to release heat absorbed from the equipment 53, 54, 55 to air in the vehicle interior in the heat exchanger 7B. The system further includes a heat-radiation suppressing structure 60 that suppresses heat dissipation from the equipment 53, 54, 55 to surrounding environment.
    Type: Application
    Filed: August 25, 2010
    Publication date: September 6, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Sachio Sekiya, Tadashi Osaka, Itsuro Sawada, Yuto Imanishi
  • Publication number: 20120222441
    Abstract: A heat cycle system for a mobile object includes: a refrigeration cycle system 10 in which a refrigerant flows; a first heat transfer system 20 in which a heat medium that controls a temperature of a heat-generating body 2 flows; a second heat transfer system 30 in which a heat medium that controls a state of air in an interior of the mobile object flows; a first intermediate heat exchanger 40 which is provided between the refrigeration cycle system 10 and the first heat transfer system 20 and in which the refrigerant and the heat medium exchange heat therebetween; a second intermediate heat exchanger 50 which is provided between the refrigeration cycle system 10 and the second heat transfer system 30 and in which the refrigerant and the heat medium exchange heat therebetween; a first interior heat exchanger 23 which is provided in the first heat transfer system 20 and in which air taken into the interior of the mobile object and the heat medium exchange heat therebetween; a second interior heat exchanger 32
    Type: Application
    Filed: August 25, 2010
    Publication date: September 6, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Itsuro Sawada, Tadashi Osaka, Yuto Imanishi, Sachio Sekiya
  • Publication number: 20120222438
    Abstract: An air-conditioning system for a vehicle for performing cooling/air-heating of a temperature controlling object includes: a temperature detection unit 63 that detects a temperature of the temperature controlling object; a controller 61 that controls the air-conditioning system based on a temperature detected by the temperature detection unit 63; a prediction unit 61 that predicts a forward temperature of the temperature controlling object based on at least either one of a detected temperature detected by the temperature detection unit 63 and a current vehicle driving state; a target temperature change unit 61 that changes a target temperature of the temperature controlling object or a target temperature of a cooling medium in the air-conditioning system for a vehicle based on a result of prediction by the prediction unit 61; wherein the controller 61 controls cooling/air-heating of the temperature controlling object based on a target temperature changed by the target temperature change unit 61.
    Type: Application
    Filed: August 25, 2010
    Publication date: September 6, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Tadashi Osaka, Sachio Sekiya, Itsuro Sawada, Yuto Imanishi
  • Publication number: 20120159986
    Abstract: A cooling system for an electric vehicle, includes: a cooling-medium circulation passage through which a cooling medium circulates to travel to heat exchange target objects mounted in a vehicle that is electrically driven; an electric compressor disposed in the cooling-medium circulation passage to compress the cooling medium; and a heat exchange unit that achieves heat exchange between the cooling medium and outside air, wherein: the electric compressor is disposed at a position outside a primary outflow path through which the outside air, having undergone heat exchange at the heat exchange unit, flows from the heat exchange unit to outside the vehicle.
    Type: Application
    Filed: August 24, 2010
    Publication date: June 28, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Yuto Imanishi, Tadashi Osaka, Sachio Sekiya
  • Publication number: 20120049664
    Abstract: A drive unit for an electric vehicle comprises a device that electrically drives a vehicle, a heat transport system for transporting heat absorbed from the device into the vehicle interior air, and a heat-radiation adjusting system for adjusting heat radiating from the device into the ambient air.
    Type: Application
    Filed: August 19, 2011
    Publication date: March 1, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Atsushi YOKOYAMA, Tadashi Osaka, Yuto Imanishi, Sachio Sekiya
  • Publication number: 20120037352
    Abstract: A vehicular air conditioning system capable of suppressing the power consumption of a refrigerating cycle is disclosed. The vehicular air conditioning system comprises a refrigerating cycle circuit comprising a compressor, an outside heat exchanger and an inside air conditioning heat exchanger annularly connected in order, and a device cooling circuit comprising a heating unit, an inside cooling heat exchanger, an intermediate heat exchanger and a pump being annularly connected, the intermediate heat exchanger being constructed such that one end of a piping of the cooling medium for air conditioning is connected to a liquid piping, the liquid piping providing connection between the outside heat exchanger and the inside air conditioning heat exchanger, and an opposite end of the piping of the cooling medium for air conditioning is connected to a suction port of the compressor.
    Type: Application
    Filed: August 9, 2011
    Publication date: February 16, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Tadashi OSAKA, Hiroaki MATSUSHIMA, Sachio SEKIYA, Yuto IMANISHI
  • Publication number: 20120024517
    Abstract: A heat cycle system includes: a refrigerating cycle system that circulates a refrigerant; a medium circulation circuit that includes a circulation pump for circulating a heat-transfer medium, and adjusts a temperature of a temperature control target with the heat-transfer medium; a heat exchanger that executes heat exchange between the refrigerant in the refrigerating cycle system and the heat-transfer medium in the medium circulation circuit; and a volume altering unit that alters a volume of the heat-transfer medium circulating in the medium circulation circuit.
    Type: Application
    Filed: July 28, 2011
    Publication date: February 2, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Yuto Imanishi, Itsuro Sawada, Tadashi Osaka, Sachio Sekiya
  • Publication number: 20110118924
    Abstract: A control system for an electric vehicle includes: an electricity storage device that performs charging and discharging of electrical power; a plurality of load devices that receive supply of electrical power from the electricity storage device and perform operations; and a control device that controls the electricity storage device and the plurality of load devices. And when electrical power is supplied from the electricity storage device to the plurality of load devices, the control device calculates a charge/discharge efficiency of the electricity storage device and a working efficiency of each of the load devices, and regulates an amount of electrical power supplied from the electricity storage device to each of the load devices, so as to enhance an overall efficiency of the electricity storage device and the plurality of load devices.
    Type: Application
    Filed: November 17, 2010
    Publication date: May 19, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Shingo Nasu, Atsushi Yokoyama, Tadashi Osaka, Itsuro Sawada