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).
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Patent number: 10625570Abstract: 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: GrantFiled: July 5, 2018Date of Patent: April 21, 2020Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hidefumi Aikawa, Yoichi Ogura, Yuji Miyoshi, Masatoshi Yano, Yu Ofune
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Patent number: 10618378Abstract: 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: GrantFiled: July 5, 2018Date of Patent: April 14, 2020Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hidefumi Aikawa, Yoichi Ogura, Masatoshi Yano, Yuji Miyoshi, Yu Ofune
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Patent number: 10618379Abstract: 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: GrantFiled: July 5, 2018Date of Patent: April 14, 2020Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hidefumi Aikawa, Yoichi Ogura, Masatoshi Yano, Yuji Miyoshi, Yu Ofune
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Publication number: 20200047605Abstract: 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: ApplicationFiled: April 16, 2019Publication date: February 13, 2020Inventors: Takuya HIRAI, Yuji MIYOSHI, Tomohiro SHINAGAWA, Masatoshi YANO, Hiroyuki SUGIHARA, Ryo MICHIKAWAUCHI, Kunihiko HAYASHI, Yoichi OGURA, Hidefumi AIKAWA, Yu OFUNE
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Publication number: 20200009941Abstract: 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: ApplicationFiled: April 3, 2019Publication date: January 9, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidefumi AIKAWA, Kei OKAMOTO, Minoru OHMIKAWA
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Publication number: 20190344640Abstract: 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: ApplicationFiled: March 29, 2019Publication date: November 14, 2019Applicant: Toyota Jidosha Kabushiki KaishaInventors: Hidefumi AIKAWA, Hideo Nishioka, Nobuharu Kakehashi
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Patent number: 10473045Abstract: 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: GrantFiled: February 25, 2013Date of Patent: November 12, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hidefumi Aikawa
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Publication number: 20190329644Abstract: 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: ApplicationFiled: March 22, 2019Publication date: October 31, 2019Inventors: Yoichi OGURA, Kunihiko HAYASHI, Masatoshi YANO, Yuji MIYOSHI, Takuya HIRAI, Tomohiro SHINAGAWA, Ryo MICHIKAWAUCHI, Hidefumi AIKAWA, Yu OFUNE
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Patent number: 10254051Abstract: 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: GrantFiled: February 16, 2017Date of Patent: April 9, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Amano, Hidefumi Aikawa, Yoshio Hasegawa, Jumpei Kashiwakura
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Publication number: 20190009642Abstract: 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: ApplicationFiled: July 5, 2018Publication date: January 10, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidefumi AIKAWA, Yoichi OGURA, Yuji MIYOSHI, Masatoshi YANO, Yu OFUNE
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Publication number: 20190009645Abstract: 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: ApplicationFiled: July 5, 2018Publication date: January 10, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidefumi Aikawa, Yoichi Ogura, Masatoshi Yano, Yuji Miyoshi, Yu Ofune
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Publication number: 20190009644Abstract: 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: ApplicationFiled: July 5, 2018Publication date: January 10, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidefumi AIKAWA, Yoichi OGURA, Masatoshi YANO, Yuji MIYOSHI, Yu OFUNE
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Publication number: 20190009643Abstract: 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: ApplicationFiled: July 5, 2018Publication date: January 10, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masatoshi YANO, Hidefumi AIKAWA, Yoichi OGURA, Yuji MIYOSHI, Yu OFUNE
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Publication number: 20190009646Abstract: 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: ApplicationFiled: July 9, 2018Publication date: January 10, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidefumi AIKAWA, Yoichi OGURA, Masatoshi YANO, Yuji MIYOSHI, Yu OFUNE
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Patent number: 10124652Abstract: A vehicular heat management system including a heater for carrying out heating of a heat medium and stop the heating, and a heat exchanger configured to carry out heat exchange between lubricant oil for lubricating a speed change apparatus and the heat medium. A heat medium circulator is provided that is configured to switch the heat medium circulation state between a first circulation state where the heat medium circulates through the heater and the heat exchanger, and a second circulation state where the heat medium circulates through the heater and a heater core. An electronic control unit is also provided.Type: GrantFiled: February 2, 2016Date of Patent: November 13, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoru Ito, Takashi Amano, Hidefumi Aikawa
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Publication number: 20180297445Abstract: A vehicle heat management device includes a first circulator section, a second circulator section, and a flow rate change section. The first circulator section is provided at a first flow path of a first circulation path, and circulates a first heat exchange medium in the first circulation path, the first flow path passing a first heat exchanger, a second flow path passing a first expansion valve and a second heat exchanger, a third flow path passing a second expansion valve and a heat absorption section. The second circulator section circulates a second heat exchange medium in a second circulation path configured by a fourth flow path passing a heat generating body, a fifth flow path passing a radiator, and a sixth flow path passing a heat dissipating section and the first heat exchanger. The flow rate change section increases a flow rate of the second heat exchange medium.Type: ApplicationFiled: February 21, 2018Publication date: October 18, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoichi ONISHI, Keisuke Shibata, Yoshikazu Shinpo, Kei Okamoto, Tomohiro Shinagawa, Hidefumi Aikawa, Masaki Suzuki, Nobuharu Kakehashi
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Patent number: 10029668Abstract: An apparatus for controlling an internal combustion engine in a hybrid vehicle is provided with: a specifying device configured to specify the operation aspect at a previous stop time point of the internal combustion engine in an EV running period; a first start controlling device configured to start the internal combustion engine in the cylinder deactivation operation at a time point at which a required output corresponding value of the hybrid vehicle is a first reference value, if the specified operation aspect is the cylinder deactivation operation; and a second start controlling device configured to start the internal combustion engine in the full cylinder operation at a time point at which the required output corresponding value is a second reference value, which is greater than the first reference value, if the specified operation aspect is the full cylinder operation.Type: GrantFiled: July 4, 2013Date of Patent: July 24, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hidefumi Aikawa
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Publication number: 20170253104Abstract: A heat management system for vehicles comprises: a first circulation circuit which cools an engine body of an internal combustion engine and includes a first pump for pressure-feeding a refrigerant; a second circulation circuit including an exhaust heat recovery apparatus for recovering exhaust heat from the internal combustion engine, a heater core used for air-conditioning of a vehicle, and a second pump for pressure-feeding the refrigerant; communication passages allowing the first circulation circuit to communicate with the second circulation circuit; and an on-off valve provided in the first communication passage, and switching between the communication between the first circulation circuit and the second circulation circuit and the preventing of communication therebetween, wherein the on-off valve is controlled such that the refrigerant temperature of the first circulation circuit is higher than that of the second circulation circuit.Type: ApplicationFiled: August 7, 2015Publication date: September 7, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi AMANO, Hidefumi AIKAWA, Kojiro HAYAKAWA
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Publication number: 20170241719Abstract: 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: ApplicationFiled: February 16, 2017Publication date: August 24, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi AMANO, Hidefumi AIKAWA, Yoshio HASEGAWA, Jumpei KASHIWAKURA
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Patent number: 9708964Abstract: A cooling apparatus comprises a first cooling conduit branching off from a downstream side connection conduit to cool the cylinder head, a second cooling conduit branching off from the downstream side connection conduit, is provided in parallel with the first cooling conduit, an intermediate cooling conduit being connected to the first and second cooling conduits, is provided with an EGR cooler, a third cooling conduit running from a connection point of the intermediate cooling conduit and the first cooling conduit to an upstream side connection conduit, a fourth cooling conduit running from a connection point of the intermediate cooling conduit and the second cooling conduit to the upstream side connection conduit, and a changeover valve for adjusting the flow resistance of the second cooling conduit. And the direction of coolant flow in the intermediate cooling conduit is changed over by operating the changeover valve.Type: GrantFiled: March 13, 2015Date of Patent: July 18, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Amano, Hidefumi Aikawa, Kojiro Hayakawa