Patents by Inventor Ryo Michikawauchi

Ryo Michikawauchi 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: 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
  • Patent number: 10677141
    Abstract: A heat radiation amount from the cooling water in the radiator is adjusted so that the temperature of the cooling water is less than a prescribed temperature that is a temperature higher than the threshold value if a load exerted on the internal combustion engine is not less than a predetermined load, while the heat radiation amount from the cooling water in the radiator is adjusted so that the heat radiation amount from the cooling water in the radiator is increased if the load exerted on the internal combustion engine is less than the predetermined load as compared with if the load exerted on the internal combustion engine is not less than the predetermined load.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: June 9, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo Michikawauchi
  • 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: 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: 10415455
    Abstract: A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: September 17, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshio Hasegawa, Yuji Miyoshi, Tomohiro Shinagawa, Yoshiharu Hirata, Ryo Michikawauchi
  • Patent number: 10385759
    Abstract: A cooling system includes: a first coolant passage; a second coolant passage; a pump; a radiator; a third coolant passage; a connection switching mechanism that switches between a forward flow connection state and a reverse flow connection state; a fourth coolant passage; a fifth coolant passage; and a shutoff valve configured to open/shut off the fifth coolant passage. The radiator is disposed at a location at which coolant flowing from a second end of the first coolant passage into a fourth end of the second coolant passage is not cooled in the reverse flow connection state, and coolant flowing out from the second end of the first coolant passage and the fourth end of the second coolant passage is cooled in the forward flow connection state.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: August 20, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshio Hasegawa, Tomohiro Shinagawa, Kenichi Kubota, Ryo Michikawauchi, Yuji Miyoshi, Yoshiharu Hirata, Naoto Yumisashi
  • Publication number: 20180298808
    Abstract: A cooling apparatus of an internal combustion engine according to the invention comprises a first passage formed in the cylinder block, through which the cooling medium flows for cooling between-bores portions, a second passage formed in the cylinder block, through which the cooling medium flows for cooling a bore-surrounding portion, and a cooling medium supplying mechanism for supplying the cooling medium to the first and second passages such that ability of the cooling medium for cooling the between-bore portions, is different from the ability of the cooling medium for cooling the bore-surrounding portion.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 18, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiko SUGIURA, Rentaro Kuroki, Ryo Michikawauchi, Yuji Miyoshi
  • Publication number: 20180283259
    Abstract: A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.
    Type: Application
    Filed: March 26, 2018
    Publication date: October 4, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshio HASEGAWA, Yuji Miyoshi, Tomohiro Shinagawa, Yoshiharu Hirata, Ryo Michikawauchi
  • Publication number: 20180230892
    Abstract: A cooling system includes: a first coolant passage; a second coolant passage; a pump; a radiator; a third coolant passage; a connection switching mechanism that switches between a forward flow connection state and a reverse flow connection state; a fourth coolant passage; a fifth coolant passage; and a shutoff valve configured to open/shut off the fifth coolant passage. The radiator is disposed at a location at which coolant flowing from a second end of the first coolant passage into a fourth end of the second coolant passage is not cooled in the reverse flow connection state, and coolant flowing out from the second end of the first coolant passage and the fourth end of the second coolant passage is cooled in the forward flow connection state.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 16, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yoshio HASEGAWA, Tomohiro SHINAGAWA, Kenichi KUBOTA, Ryo MICHIKAWAUCHI, Yuji MIYOSHI, Yoshiharu HIRATA, Naoto YUMISASHI
  • Patent number: 9903259
    Abstract: A change in a valve opening degree from an opening degree (a) to an opening degree (d) is caused by a decrease in a radiator outlet water temperature, and at such time a flow rate through a radiator enters a boiling region. Therefore, when such entry is predicted, a target engine outlet water temperature is forcedly changed from 105° C. to 100° C. Thereupon, the valve opening degree is changed from the opening degree (a) to an opening degree (f). The flow rate through the radiator when the valve opening degree is the opening degree (f) is greater than the flow rate through the radiator when the valve opening degree is the opening degree (d), and furthermore, the flow rate through the radiator does not enter the boiling region while the valve opening degree is changing from the opening degree (a) to the opening degree (f).
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: February 27, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Watanabe, Ryo Michikawauchi
  • Publication number: 20170321597
    Abstract: A heat radiation amount from the cooling water in the radiator is adjusted so that the temperature of the cooling water is less than a prescribed temperature that is a temperature higher than the threshold value if a load exerted on the internal combustion engine is not less than a predetermined load, while the heat radiation amount from the cooling water in the radiator is adjusted so that the heat radiation amount from the cooling water in the radiator is increased if the load exerted on the internal combustion engine is less than the predetermined load as compared with if the load exerted on the internal combustion engine is not less than the predetermined load.
    Type: Application
    Filed: November 27, 2015
    Publication date: November 9, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo MICHIKAWAUCHI
  • Patent number: 9758017
    Abstract: In order to shift a rotation angle of a rotor to a region of a normal mode (for example, a region c) from a region of a heater cut mode (for example, a region e), the rotation angle needs to pass through a region where a flow rate of a refrigerant which is caused to flow through all branch channels becomes zero (a region d). When the refrigerant has a high temperature, there is a possibility of the refrigerant being not cooled, and boiling. Therefore, when a request to switch a normal mode and a heater cut mode is issued, permission/non-permission of switch of the mode is determined by comparison of a temperature of the refrigerant detected by the temperature sensor 26 and an upper limit temperature of the refrigerant.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: September 12, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo Michikawauchi
  • Patent number: 9644507
    Abstract: An oil pan structure (1) includes a lower structure (2) fixed to a lower portion of an engine block, a main oil pan (3) provided under an engine block with the lower structure being between the main oil pan and the engine block, a sub oil pan (5) that is provided in the main oil pan (3) and forms a first chamber (6) and a second chamber (7) inside the main oil pan (3). The sub oil pan (5) is separated into an upper body (5a) and a lower body (5b). The upper body (5a) is formed together with the lower structure (2) by injection molding.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: May 9, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenichi Yamada, Hideo Kobayashi, Katuhiko Arisawa, Toshihisa Sugiyama, Kunihiko Hayashi, Ryo Michikawauchi
  • Publication number: 20160348567
    Abstract: A change in a valve opening degree from an opening degree (a) to an opening degree (d) is caused by a decrease in a radiator outlet water temperature, and at such time a flow rate through a radiator enters a boiling region. Therefore, when such entry is predicted, a target engine outlet water temperature is forcedly changed from 105° C. to 100° C. Thereupon, the valve opening degree is changed from the opening degree (a) to an opening degree (f). The flow rate through the radiator when the valve opening degree is the opening degree (f) is greater than the flow rate through the radiator when the valve opening degree is the opening degree (d), and furthermore, the flow rate through the radiator does not enter the boiling region while the valve opening degree is changing from the opening degree (a) to the opening degree (f).
    Type: Application
    Filed: May 25, 2016
    Publication date: December 1, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi WATANABE, Ryo MICHIKAWAUCHI
  • Patent number: 9488138
    Abstract: The control device of an internal combustion engine of the present invention is a control device of an internal combustion engine in which a bypass channel (25) for bypassing a throttle valve (6) of an engine intake system (5) via an evaporated fuel adsorption device is provided as a fuel emission path to an evaporated fuel adsorption device (22) for adsorbing evaporated fuel in a fuel tank (19), and exhaust gas recirculation is implemented for recirculating exhaust gas via an exhaust gas recirculation passage (17) connected upstream of the entrance of the bypass channel of the engine intake system.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: November 8, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo Michikawauchi
  • Publication number: 20160281583
    Abstract: A cylinder block of an internal combustion engine, the cylinder block includes a partition wall arranged between a plurality of cylinder bores, the cylinder bores are adjacent to one another; and a coolant passage that is arranged in the partition wall. The coolant passage includes (i) a large diameter hole not intersecting a virtual plane, the virtual plane includes central axes of the plurality of cylinder bores and (ii) a plurality of small diameter holes each having a diameter that is smaller than a diameter of the large diameter hole, the plurality of small diameter holes communicate with the large diameter hole, and the plurality of small diameter holes extend in a different direction than a direction that the large diameter hole extends, the plurality of small diameter holes intersect the virtual plane.
    Type: Application
    Filed: October 27, 2014
    Publication date: September 29, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo MICHIKAWAUCHI
  • Publication number: 20160096414
    Abstract: In order to shift a rotation angle of a rotor to a region of a normal mode (for example, a region c) from a region of a heater cut mode (for example, a region e), the rotation angle needs to pass through a region where a flow rate of a refrigerant which is caused to flow through all branch channels becomes zero (a region d). When the refrigerant has a high temperature, there is a possibility of the refrigerant being not cooled, and boiling. Therefore, when a request to switch a normal mode and a heater cut mode is issued, permission/non-permission of switch of the mode is determined by comparison of a temperature of the refrigerant detected by the temperature sensor 26 and an upper limit temperature of the refrigerant.
    Type: Application
    Filed: October 5, 2015
    Publication date: April 7, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo MICHIKAWAUCHI
  • Publication number: 20150361867
    Abstract: An internal combustion engine of a compression ignition type includes: a fuel injection valve that injects fuel to a combustion chamber; a cylinder head that includes a central portion as a portion forming the combustion chamber; and a piston that includes a cavity exposed to the combustion chamber.
    Type: Application
    Filed: January 31, 2013
    Publication date: December 17, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo MICHIKAWAUCHI
  • Publication number: 20150337756
    Abstract: An internal combustion engine 1 includes a fuel injection valve 6 that injects fuel to a combustion chamber in which a flow is generated. For example, injection holes 611A and 611B are two adjacent injection holes among plural injection holes 611, and are two injection holes injecting the fuel to a region E1 and a region E2. The region E1 and the region E2 configure regions, of the combustion chamber E, in which angular velocities of the swirl flow are respectively low and high are located in this order in a direction R in injecting the fuel. An interval F1 between the injection holes 611A and 611B are smaller than a reference interval Fs.
    Type: Application
    Filed: January 7, 2013
    Publication date: November 26, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo MICHIKAWAUCHI
  • Publication number: 20150330291
    Abstract: An internal combustion engine includes a fuel injection valve that injects fuel to a combustion chamber in which a swirl flow is generated; a piston including a cavity exposed to the combustion chamber; and a cylinder head including a central portion serving as a portion defining the combustion chamber.
    Type: Application
    Filed: January 7, 2013
    Publication date: November 19, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo MICHIKAWAUCHI