Patents by Inventor Hidefumi Aikawa

Hidefumi Aikawa 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: 11077735
    Abstract: A heating apparatus of the invention executes a first heating control for heating a heater core by a heat generation device when a process of heating the heater core is requested while an engine operation is stopped. The heating apparatus executes a second heating control for heating the cooling water which cooled an internal combustion engine, by the heat generation device and supplying the heated cooling water to the heater core when a heater core temperature is not increased to a requested temperature only by the heat generation device. The heating apparatus executes a third heating control for stopping the engine operation, heating the cooling water which cooled the internal combustion engine, by the heat generation device, and supplying the heated cooling water to the heater core when an engine temperature becomes equal to or higher than a predetermined temperature while the second heating control is executed.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: August 3, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidefumi Aikawa, Kei Okamoto, Minoru Ohmikawa
  • Patent number: 11072223
    Abstract: A control apparatus of a heat exchanging system according to the invention activates a connection system to connect an engine water passage to a heater water passage and then, shuts off a heater water passage portion between a portion, into which heat exchanging water flows from the engine water passage and a portion, from which the heat exchanging water flows out toward the engine water passage, and decreases heater pump and engine pump duty ratios when the duty ratios should be decreased for controlling core and engine flow rates to requested flow rates after the particular water passage is shut off, and the engine water passage is connected to the heater water passage.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: July 27, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidefumi Aikawa, Yoichi Ogura, Masatoshi Yano, Yuji Miyoshi, Yu Ofune
  • Publication number: 20210101448
    Abstract: A vehicle-mounted temperature controller 100 provided with a compressor 2 having a compression part 2a compressing a refrigerant and a drive motor 2b driving the compression part 2a and using waste heat accompanying driving of the compression part 2a to make the temperature of the refrigerant rise, a blower 61 blowing air to a heater core 145 raised in temperature by receiving heat of the refrigerant and blowing air exchanged in heat with the heater core 145 to the inside of the passenger compartment, and an electronic control unit 51 controlling a current phase of the drive motor 2b to a phase by which a ratio of change of an output of the drive motor 2b to a change of the current phase becomes relatively larger to thereby drive the drive motor 2b by an inefficient drive operation when the blower 61 is in a nondriven state and controlling the current phase to a phase by which a ratio of change of an output of the drive motor 2b to a change of the current phase becomes relatively smaller to thereby drive the
    Type: Application
    Filed: September 29, 2020
    Publication date: April 8, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuya HIRAI, Hidefumi AIKAWA, Yuji MIYOSHI
  • Publication number: 20210094443
    Abstract: A cooling system includes a shared path; a first path connected to the shared path and having a first pump and a first heat exchanger exchanging heat with an inverter; a second path connected to the shared path in parallel with the first path and having a second pump and a second heat exchanger exchanging heat with a battery. The first and second paths are configured to be able to switch a flow state between a first state where the heat media flow through the shared path, and a second state where one of the heat media does not flow through the shared path. The control device controls the outputs of the pumps so that when switching the flow state between the first and second states, flow rate of the heat medium flowing through the first path becomes temporarily larger than the target flow rate.
    Type: Application
    Filed: September 16, 2020
    Publication date: April 1, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hidefumi AIKAWA
  • Publication number: 20210094390
    Abstract: A cooling system mounted in a vehicle includes a radiator exchanging heat with the outside air; first and second flow paths; and a control device. The first path is configured so that when the first pump is operating, a heat medium circulates through the radiator and a first heat exchanger exchanging heat with the inverter. The second flow path is connected to the radiator in parallel with the first flow path, and is configured so that when the second pump is operating, the heat medium circulates through the radiator and a second heat exchanger exchanging heat with the battery. The control device controls the outputs of the first and second pumps so that when making both of the outputs rise or fall, the flow rate of the heat medium flowing through the first flow path becomes temporarily larger than the target flow rate.
    Type: Application
    Filed: September 11, 2020
    Publication date: April 1, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hidefumi AIKAWA
  • Patent number: 10906387
    Abstract: A cooling apparatus of a vehicle driving system of the invention connects an engine water circulation passage to a hybrid system water circulation passage and flows cooling water in the engine water circulation passage and the hybrid system water circulation passage to cool a first hybrid system component by the cooling water cooled by an engine radiator and cool a second hybrid system component by the cooling water cooled by a hybrid system radiator when an engine cooling process is not requested, a first hybrid system cooling process is requested, a second hybrid system cooling process is requested, and a connection condition is satisfied. The connection condition is satisfied when the engine cooling process is not requested, and the cooling water flowing into the hybrid system water circulation passage from the engine water circulation passage, can cool the first hybrid system component.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: February 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuya Hirai, Yuji Miyoshi, Tomohiro Shinagawa, Masatoshi Yano, Hiroyuki Sugihara, Ryo Michikawauchi, Kunihiko Hayashi, Yoichi Ogura, Hidefumi Aikawa, Yu Ofune
  • Publication number: 20210008951
    Abstract: A vehicle-mounted temperature controller has a first heat circuit and a refrigeration circuit. The first heat circuit has a first radiator exchanging heat with outside air, a first heat exchanger, and a first pump, and configured so that a first heat medium is circulated therethrough. The refrigeration circuit has the first heat exchanger discharging heat from the refrigerant to a first heat medium to make a refrigerant condense, a second heat exchanger absorbing heat to the refrigerant to thereby make the refrigerant evaporate and to cool an object to be cooled, and a compressor, and is configured so that the refrigerant circulates through the first heat exchanger and the second heat exchanger and thereby a refrigeration cycle is realized. When the object to be cooled starts being cooled, the compressor is started up after the first pump is started up.
    Type: Application
    Filed: May 29, 2020
    Publication date: January 14, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidefumi AIKAWA, Yuji MIYOSHI
  • Publication number: 20200317026
    Abstract: A vehicle-mounted temperature controller, comprising: a first heat circuit having a heater core used for heating and a first heat exchanger and configured so that a first heat medium is circulated therethrough; a refrigeration circuit having the first heat exchanger condensing the refrigerant and an evaporator evaporating the refrigerant, and configured to realize a refrigeration cycle; and a heat medium flow path of an internal combustion engine configured to communicate with the first heat circuit so that the first heat medium circulates therethrough. The first heat circuit is configured so that an outlet of the heat medium flow path is communicated with a core downstream side part positioned downstream of the heater core and upstream of the first heat exchanger and a core upstream side part positioned downstream of the first heat exchanger and upstream of the heater core.
    Type: Application
    Filed: April 1, 2020
    Publication date: October 8, 2020
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Kitamura, Hidefumi Aikawa, Yuji Miyoshi, Masaki Suzuki
  • Publication number: 20200290431
    Abstract: A vehicle-mounted temperature controller includes a first heat circuit and a refrigeration circuit. The first heat circuit has a battery heat exchange part exchanging heat with a battery and a first heat exchange part, and configured so that a first heat medium circulates therethrough. The refrigeration circuit has a compression part compressing a refrigerant to raise its temperature, a second heat exchange part radiating heat from the refrigerant, an expansion part making the refrigerant expand, and the first heat exchange part making the refrigerant absorb heat from the first heat medium to make the refrigerant evaporate, and is configured to realize a refrigeration cycle by the refrigerant circulating therethrough. The first heat circuit includes a bypass flow path bypassing the battery heat exchange part and an adjusting device adjusting a flow rate of the first heat medium flowing through the bypass flow path.
    Type: Application
    Filed: March 11, 2020
    Publication date: September 17, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidefumi AIKAWA, Manabu ORIHASHI, Yoshio HASEGAWA, Takashi OGAWA
  • Publication number: 20200290426
    Abstract: A vehicle-mounted temperature controller includes a low temperature circuit and a refrigeration circuit. The low temperature circuit has a heat generating equipment heat exchanger exchanging heat with heat generating equipment, a radiator, a first heat exchanger, and a three-way valve. The refrigeration circuit has a second heat exchanger discharging heat from the refrigerant to a high temperature circuit to make the refrigerant condense, and the first heat exchanger making the refrigerant absorb heat from the cooling water to make the refrigerant evaporate. The low temperature circuit includes a first partial circuit through which the cooling water flows through the radiator and the first heat exchanger, and a second partial circuit through which the cooling water flows through the heat generating equipment heat exchanger without passing through the radiator and the first heat exchanger. The cooling water circulates simultaneously and separately at these first partial circuit and second partial circuit.
    Type: Application
    Filed: March 12, 2020
    Publication date: September 17, 2020
    Inventors: Hidefumi AIKAWA, Manabu ORIHASHI, Yoshio HASEGAWA, Takashi OGAWA, Yuji MIYOSHI, Kunihiko HAYASHI
  • Patent number: 10647177
    Abstract: A control apparatus of a heat exchanging system according to the invention, decreases a duty ratio of the heater pump after connecting an engine water passage to a heater water passage, shutting off a predetermined water passage portion of the heater water passage, and increasing a duty ratio of an engine pump when the controls for shutting off the predetermined water passage portion, connecting the engine water passage to the heater water passage, decreasing the duty ratio of the heater pump, and increasing the duty ratio of the engine pump, are requested to be executed.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: May 12, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masatoshi Yano, Hidefumi Aikawa, Yoichi Ogura, Yuji Miyoshi, Yu Ofune
  • Patent number: 10625570
    Abstract: A control apparatus according to the invention is applied to a heat exchanging system comprising a connection system for connecting an engine water passage for heat exchanging water for cooling an internal combustion engine and the heater water passage for the heat exchanging water for heating a heater core to each other. The apparatus activates the connection system to connect the engine water passage to the heater water passage when a temperature of the heat exchanging water circulating through the engine water passage, is equal to or higher than the temperature of the heat exchanging water circulating through the heater water passage, and an interior of a vehicle is requested to be warmed up.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidefumi Aikawa, Yoichi Ogura, Yuji Miyoshi, Masatoshi Yano, Yu Ofune
  • Patent number: 10618379
    Abstract: A control apparatus of a heat exchanging apparatus according to the invention executes a control for activating a connection system to connect an engine water passage to a heater water passage and then, executes a control for decreasing a heater pump duty ratio and a control for decreasing an engine pump duty ratio when the control for decreasing the heater pump duty ratio and the control for decreasing the engine pump duty ratio are requested to be executed in order to control a core flow rate to a requested core flow rate and an engine flow rate to a requested engine flow rate after the engine water passage is connected to the heater water passage by the connection system.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 14, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidefumi Aikawa, Yoichi Ogura, Masatoshi Yano, Yuji Miyoshi, Yu Ofune
  • Patent number: 10618378
    Abstract: A control apparatus of a heat exchanging system according to the invention executes a control for activating a connection system to connect an engine water passage to a heater water passage and a control for increasing an engine pump duty ratio, and then executes a control for decreasing a heater pump duty ratio when the control for decreasing the heater pump duty ratio and the control for increasing the engine pump duty ratio are requested to be executed in order to control a core flow rate to a requested core flow rate and an engine flow rate to a requested engine flow rate after the engine water passage is connected to the heater water passage by the connection system.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 14, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidefumi Aikawa, Yoichi Ogura, Masatoshi Yano, Yuji Miyoshi, Yu Ofune
  • Publication number: 20200047605
    Abstract: A cooling apparatus of a vehicle driving system of the invention connects an engine water circulation passage to a hybrid system water circulation passage and flows cooling water in the engine water circulation passage and the hybrid system water circulation passage to cool a first hybrid system component by the cooling water cooled by an engine radiator and cool a second hybrid system component by the cooling water cooled by a hybrid system radiator when an engine cooling process is not requested, a first hybrid system cooling process is requested, a second hybrid system cooling process is requested, and a connection condition is satisfied. The connection condition is satisfied when the engine cooling process is not requested, and the cooling water flowing into the hybrid system water circulation passage from the engine water circulation passage, can cool the first hybrid system component.
    Type: Application
    Filed: April 16, 2019
    Publication date: February 13, 2020
    Inventors: Takuya HIRAI, Yuji MIYOSHI, Tomohiro SHINAGAWA, Masatoshi YANO, Hiroyuki SUGIHARA, Ryo MICHIKAWAUCHI, Kunihiko HAYASHI, Yoichi OGURA, Hidefumi AIKAWA, Yu OFUNE
  • Publication number: 20200009941
    Abstract: A heating apparatus of the invention executes a first heating control for heating a heater core by a heat generation device when a process of heating the heater core is requested while an engine operation is stopped. The heating apparatus executes a second heating control for heating the cooling water which cooled an internal combustion engine, by the heat generation device and supplying the heated cooling water to the heater core when a heater core temperature is not increased to a requested temperature only by the heat generation device. The heating apparatus executes a third heating control for stopping the engine operation, heating the cooling water which cooled the internal combustion engine, by the heat generation device, and supplying the heated cooling water to the heater core when an engine temperature becomes equal to or higher than a predetermined temperature while the second heating control is executed.
    Type: Application
    Filed: April 3, 2019
    Publication date: January 9, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidefumi AIKAWA, Kei OKAMOTO, Minoru OHMIKAWA
  • Publication number: 20190344640
    Abstract: A heat managing device for a vehicle includes: a cooling water circulating path that includes a radiator carrying out heat exchange with outside air, and that circulates cooling water; a coolant circulating path that includes an out-of-cabin device carrying out heat exchange with outside air, that circulates a coolant, and that makes it possible to supply heated air to a vehicle cabin interior by a heat pump cycle; a heat exchanger that carries out heat exchange between the cooling water and the coolant; and a control section that controls the cooling water circulating path so as to cause heat to be absorbed from outside air at the radiator, and that can controls the coolant circulating path so as to cause the coolant to absorb heat from outside air at the out-of-cabin device.
    Type: Application
    Filed: March 29, 2019
    Publication date: November 14, 2019
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidefumi AIKAWA, Hideo Nishioka, Nobuharu Kakehashi
  • Patent number: 10473045
    Abstract: A control apparatus is applied to an internal combustion engine that is capable of implementing reduced-cylinder operation and all-cylinder operation. When the internal combustion engine is stopped during implementation of reduced-cylinder operation, and then the internal combustion engine is restarted in reduced-cylinder operation with the same cylinders as idling cylinders, the initial crank angle when cranking starts is controlled so that the position of the piston of at least one among the idling cylinders is in the vicinity of its top dead center.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: November 12, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hidefumi Aikawa
  • Publication number: 20190329644
    Abstract: A cooling apparatus of a vehicle driving system for driving a vehicle according to the invention activates a heat pump to cool a hybrid system by cooling medium and flows an engine cooling water in an engine water circulation passage through a condenser to cool the cooling medium by the engine cooling water at the condenser when an engine water circulation condition is satisfied. The engine water circulation condition is a condition that a heat pump activation condition is satisfied, and an engine cooling condition is not satisfied. The heat pump activation condition is a condition that a process of cooling the hybrid system by the cooling medium of the heat pump is requested. The engine cooling condition is a condition that a process of cooling an internal combustion engine by the engine cooling water is requested.
    Type: Application
    Filed: March 22, 2019
    Publication date: October 31, 2019
    Inventors: Yoichi OGURA, Kunihiko HAYASHI, Masatoshi YANO, Yuji MIYOSHI, Takuya HIRAI, Tomohiro SHINAGAWA, Ryo MICHIKAWAUCHI, Hidefumi AIKAWA, Yu OFUNE
  • Patent number: 10254051
    Abstract: There is provided a control system of a chemical heat accumulator which enables to facilitate small-sizing of the chemical heat accumulator by carrying out heat release and heat accumulation according to a degree of priority by appropriately selecting a location of carrying out the heat release and heat accumulation on priority basis. A chemical heat accumulator includes a valve mechanism which makes a plurality of reactors communicate separately with a reservoir, and cuts off the plurality of reactors from the reservoir.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: April 9, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Amano, Hidefumi Aikawa, Yoshio Hasegawa, Jumpei Kashiwakura