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).

  • Publication number: 20160221417
    Abstract: A vehicular heat management system is described and includes: a heater configured to carry 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. When a pre-operation warm-up request to warm up the speed change apparatus and a pre-operation heating request to heat a vehicle cabin are both issued, the electronic control unit causes the heat medium circulator to switch the circulation state such that a warm-up of the speed change apparatus is carried out before heating of a vehicle cabin.
    Type: Application
    Filed: February 2, 2016
    Publication date: August 4, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru ITO, Takashi AMANO, Hidefumi AIKAWA
  • Publication number: 20160121875
    Abstract: An apparatus (100) for controlling an internal combustion engine (200) in a hybrid vehicle (1) 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 (Ft) of the hybrid vehicle is a first reference value (Ftct1), 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 (Ftct2), which is greater than the first reference value, if the specified operation aspect is the full cylinder operation.
    Type: Application
    Filed: July 4, 2013
    Publication date: May 5, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hidefumi Aikawa
  • Publication number: 20160003177
    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: Application
    Filed: February 25, 2013
    Publication date: January 7, 2016
    Inventor: Hidefumi AIKAWA
  • Publication number: 20150267602
    Abstract: 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: Application
    Filed: March 13, 2015
    Publication date: September 24, 2015
    Inventors: Takashi AMANO, Hidefumi AIKAWA, Kojiro HAYAKAWA
  • Patent number: 7628013
    Abstract: A control device is applied to a multi-cylinder 4-cycle charge compression ignition-type internal combustion engine. The control device operates to open an exhaust valve in an exhaust stroke of each cylinder, operates to close an intake valve before an intake bottom dead center, and then, operates to open the exhaust valve again before the intake bottom dead center. An exhaust flow rate regulating valve is disposed in a collecting portion of an exhaust path and its opening is controlled. Hereby, a period in which the exhaust valve is open in an intake stroke of one cylinder and a period in which the exhaust valve is open in an exhaust stroke of another cylinder partially overlap each other. Combustion gas pushed out of a combustion chamber of the other cylinder in the overlapping period is pushed into a combustion chamber of the one cylinder via the exhaust path.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: December 8, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidefumi Aikawa, Tatsuo Kobayashi, Fumito Chiba
  • Publication number: 20050252464
    Abstract: A control device is applied to a multi-cylinder 4-cycle charge compression ignition-type internal combustion engine. The control device operates to open an exhaust valve in an exhaust stroke of each cylinder, operates to close an intake valve before an intake bottom dead center, and then, operates to open the exhaust valve again before the intake bottom dead center. An exhaust flow rate regulating valve is disposed in a collecting portion of an exhaust path and its opening is controlled. Hereby, a period in which the exhaust valve is open in an intake stroke of one cylinder and a period in which the exhaust valve is open in an exhaust stroke of another cylinder partially overlap each other. Combustion gas pushed out of a combustion chamber of the other cylinder in the overlapping period is pushed into a combustion chamber of the one cylinder via the exhaust path.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 17, 2005
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidefumi Aikawa, Tatsuo Kobayashi, Fumito Chiba
  • Patent number: 6786207
    Abstract: An evaporative fuel emission control system includes a canister that adsorbs fuel vapor generated in a fuel tank, a canister outgoing gas producing unit that causes a canister outgoing gas to flow out of the canister, a vapor condensing unit that condenses the canister outgoing gas to provide a processed gas containing a higher concentration of fuel vapor than that of the canister outgoing gas, and a processed gas passage through which the processed gas is fed to the fuel tank. A controller of this system is operable to restrict flow of the processed gas into the fuel tank when the fuel vapor concentration in the processed gas is lower than or is expected to be lower than a predetermined level.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: September 7, 2004
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Susumu Kojima, Hidefumi Aikawa
  • Patent number: 6772740
    Abstract: A canister adsorbs evaporative fuel generated in a fuel tank. A purge gas circulation pump causes canister outlet gas to flow out from the canister. A high-concentration separation unit separates canister outlet gas into high-concentration treating gas and medium-concentration gas. A medium-concentration separation unit separates medium-concentration gas flowing out from the high-concentration unit into medium-concentration circulating gas and low-concentration canister inlet gas. Treating gas is introduced into the fuel tank. Circulating gas is caused to circulate upstream of the purge gas circulation pump. Canister inlet gas is caused to circulate upstream of the canister.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: August 10, 2004
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Susumu Kojima, Hidefumi Aikawa
  • Publication number: 20040000352
    Abstract: A canister adsorbs evaporative fuel generated in a fuel tank. A purge gas circulation pump causes canister outlet gas to flow out from the canister. A high-concentration separation unit separates canister outlet gas into high-concentration treating gas and medium-concentration gas. A medium-concentration separation unit separates medium-concentration gas flowing out from the high-concentration unit into medium-concentration circulating gas and low-concentration canister inlet gas. Treating gas is introduced into the fuel tank. Circulating gas is caused to circulate upstream of the purge gas circulation pump. Canister inlet gas is caused to circulate upstream of the canister.
    Type: Application
    Filed: March 31, 2003
    Publication date: January 1, 2004
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Susumu Kojima, Hidefumi Aikawa
  • Publication number: 20030196645
    Abstract: An evaporative fuel emission control system includes a canister that adsorbs fuel vapor generated in a fuel tank, a canister outgoing gas producing unit that causes a canister outgoing gas to flow out of the canister, a vapor condensing unit that condenses the canister outgoing gas to provide a processed gas containing a higher concentration of fuel vapor than that of the canister outgoing gas, and a processed gas passage through which the processed gas is fed to the fuel tank. A controller of this system is operable to restrict flow of the processed gas into the fuel tank when the fuel vapor concentration in the processed gas is lower than or is expected to be lower than a predetermined level.
    Type: Application
    Filed: March 20, 2003
    Publication date: October 23, 2003
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Susumu Kojima, Hidefumi Aikawa