Patents by Inventor Kunihiko Hikiri

Kunihiko Hikiri 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: 10655548
    Abstract: An electric supercharging system has an electric supercharger disposed on an intake air passage of an engine and a control unit in which a microcomputer is built. Then, control unit changes an actuation timing of the electric supercharger on the basis of change amounts of a rotational speed and an accelerator opening of the engine. At this time, the control unit changes the actuation timing of the electric supercharger by correcting the actuation timing of the electric supercharger according to the rotational speed of the engine with a coefficient according to the change amount of the accelerator opening.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: May 19, 2020
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Kunihiko Hikiri, Yasuo Asaumi, Kenichiro Imaoka
  • Patent number: 10315522
    Abstract: A charge/discharge system includes a controller to control an electric power converter placed between a capacitor and a secondary battery connected in parallel. The controller includes: a request power calculation unit configured to calculate request input/output power for the electric motor generator based on current and voltage of the capacitor and input output current of the electric power converter; a capacitor discharging bias factor map configured to specify a ratio of electric power to be supplied from the capacitor to the electric motor generator to the request input power of the electric motor generator; a capacitor charging bias factor map configured to specify a ratio of electric power to be stored in the capacitor from the electric motor generator to the request output power of the electric motor generator; and a subtraction unit configured to calculate charge/discharge power of the secondary battery by subtracting, from the request input/output power, the charge/discharge power of the capacitor.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: June 11, 2019
    Assignee: Volvo Lastvagnar AB
    Inventors: Kunihiko Hikiri, Takayuki Tsuchiya
  • Patent number: 10252623
    Abstract: A charge/discharge system includes first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by the motor generator, an electric power converter that complementarily performs charging/discharging between the first and second electric chargers, and a controller. The controller controls the electric power converter based on charging conditions of the first and second electric chargers such that electric power charged in the first electric charger is charged in the second electric charger, or electric power charged in the second electric charger is charged in the first electric charger.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: April 9, 2019
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Kunihiko Hikiri, Takayuki Tsuchiya
  • Publication number: 20180216544
    Abstract: An electric supercharging system has an electric supercharger disposed on an intake air passage of an engine and a control unit in which a microcomputer is built. Then, control unit changes an actuation timing of the electric supercharger on the basis of change amounts of a rotational speed and an accelerator opening of the engine. At this time, the control unit changes the actuation timing of the electric supercharger by correcting the actuation timing of the electric supercharger according to the rotational speed of the engine with a coefficient according to the change amount of the accelerator opening.
    Type: Application
    Filed: February 17, 2015
    Publication date: August 2, 2018
    Applicant: VOLVO TRUCK CORPORATION
    Inventors: Kunihiko HIKIRI, Yasuo ASAUM!, Kenichiro IMAOKA
  • Patent number: 9834100
    Abstract: A charge/discharge system includes: first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by a motor generator; an electric power converter; and a controller. The controller controls the electric power converter such that electric power charged in the first electric charger is supplied to the motor generator, electric power charged in the second electric charger is charged in the first electric charger when a charging capacity of the first electric charger is lower than a second predetermined value. The driving force of the motor generator is reduced depending on the charging capacity when the charging capacity of the first electric charger is lower than the first predetermined value.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: December 5, 2017
    Assignee: Volvo Truck Corporation
    Inventors: Kunihiko Hikiri, Noriaki Miyake
  • Patent number: 9831671
    Abstract: A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a switching element which switches the supply of power to the load from the capacitor, a DC-DC converter which enables a voltage of the capacitor to be stepped up and supplied to the load and a control unit which enables power to be supplied to the load by pulse-controlling the switching element, controlling the DC-DC converter to output a pulse current alternately with the switching element and combining the alternately output pulse currents if the voltage of the capacitor drops below a minimum voltage capable of driving the load.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: November 28, 2017
    Assignee: Volvo Truck Corporation
    Inventors: Yoshiaki Yamada, Takayuki Tsuchiya, Kunihiko Hikiri, Koichi Itani, Hiroshi Toyama, Noriaki Miyake
  • Patent number: 9627999
    Abstract: A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a bypass switch which enables power to be directly supplied to the load from the capacitor by being switched to a connected state when a voltage of the capacitor is a voltage capable of driving the load, and a first DC-DC converter which enables the voltage of the capacitor to be stepped up and supplied to the load when the voltage of the capacitor drops below a minimum voltage capable of driving the load.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: April 18, 2017
    Assignee: Volvo Truck Corporation
    Inventors: Yoshiaki Yamada, Takayuki Tsuchiya, Kunihiko Hikiri, Koichi Itani, Hiroshi Toyama, Noriaki Miyake
  • Patent number: 9520806
    Abstract: A power supply device for supplying power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil connected in series to the capacitor and configured such that an induction current flows therein by the accumulated energy from the primary coil.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: December 13, 2016
    Assignee: Volvo Truck Corporation
    Inventors: Yoshiaki Yamada, Takayuki Tsuchiya, Kunihiko Hikiri, Kouichi Itani, Noriaki Miyake
  • Patent number: 9490710
    Abstract: A power supply device supplies power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery. The power supply device includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil configured such that an induction current flows thereinto from the primary coil by the accumulated energy, and a switching circuit configured to selectively connect the secondary coil in series to the capacitor in forward and opposite directions.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: November 8, 2016
    Assignee: Volvo Truck Corporation
    Inventors: Yoshiaki Yamada, Takayuki Tsuchiya, Kunihiko Hikiri, Koichi Itani, Noriaki Miyake
  • Publication number: 20160288662
    Abstract: A charge/discharge system includes a controller to control an electric power converter placed between a capacitor and a secondary battery connected in parallel. The controller includes: a request power calculation unit configured to calculate request input/output power for the electric motor generator based on current and voltage of the capacitor and input output current of the electric power converter; a capacitor discharging bias factor map configured to specify a ratio of electric power to be supplied from the capacitor to the electric motor generator to the request input power of the electric motor generator; a capacitor charging bias factor map configured to specify a ratio of electric power to be stored in the capacitor from the electric motor generator to the request output power of the electric motor generator; and a subtraction unit configured to calculate charge/discharge power of the secondary battery by subtracting, from the request input/output power, the charge/discharge power of the capacitor.
    Type: Application
    Filed: November 13, 2013
    Publication date: October 6, 2016
    Applicant: VOLVO LASTVAGNAR AKTIEBOLAG
    Inventors: Kunihiko HIKIRI, Takayuki TSUCHIYA
  • Publication number: 20160288663
    Abstract: A charge/discharge system is capable of supplying electric power to an electric motor generator and capable of charging with regenerative electric power from the electric motor generator. The charge/discharge system includes: a capacitor connected to the electric motor generator; a secondary battery connected in parallel to the capacitor; an electric power converter placed between the capacitor and the secondary battery to increase/decrease the charge/discharge voltage of the secondary battery; and a controller to control the electric power converter. If the SOC of the secondary battery is equal to or greater than a preset first setting value, the controller controls so that regenerative electric power of the electric motor generator is stored in the capacitor only, and if the SOC of the secondary battery falls below the first setting value, a part or an entire of the regenerative electric power of the electric motor generator is stored in the secondary battery.
    Type: Application
    Filed: November 13, 2013
    Publication date: October 6, 2016
    Applicant: VOLVO LASTVAGNAR AKTIEBOLAG
    Inventors: Kunihiko HIKIRI, Takayuki TSUCHIYA
  • Patent number: 9208957
    Abstract: An electric storage cell includes a casing configured to house an electric storage element and electrolyte, a charging reception antenna connected to the electric storage element and configured to receive electric power transmitted from a power feeding unit in a contactless manner, and a discharging transmission antenna connected to the electric storage element and configured to transmit electric power stored in the electric storage element in a contactless manner. The charging reception antenna and the discharging transmission antenna are arranged in the casing.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: December 8, 2015
    Assignee: UD TRUCKS CORPORATION
    Inventors: Shigemi Kobayashi, Kunihiko Hikiri, Masayuki Nakane
  • Publication number: 20150343909
    Abstract: A charge/discharge system includes first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by the motor generator, an electric power converter that complementarily performs charging/discharging between the first and second electric chargers, and a controller. The controller controls the electric power converter based on charging conditions of the first and second electric chargers such that electric power charged in the first electric charger is charged in the second electric charger, or electric power charged in the second electric charger is charged in the first electric charger.
    Type: Application
    Filed: November 12, 2012
    Publication date: December 3, 2015
    Inventors: KUNIHIKO HIKIRI, TAKAYUKI TSUCHIYA
  • Publication number: 20150336466
    Abstract: A charge/discharge system includes: first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by a motor generator; an electric power converter; and a controller. The controller controls the electric power converter such that electric power charged in the first electric charger is supplied to the motor generator, electric power charged in the second electric charger is charged in the first electric charger when a charging capacity of the first electric charger is lower than a second predetermined value. The driving force of the motor generator is reduced depending on the charging capacity when the charging capacity of the first electric charger is lower than the first predetermined value.
    Type: Application
    Filed: November 12, 2012
    Publication date: November 26, 2015
    Inventors: KUNIHIKO HIKIRI, NORIAKI MIYAKE
  • Publication number: 20150333632
    Abstract: A power supply device supplies power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery. The power supply device includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil configured such that an induction current flows thereinto from the primary coil by the accumulated energy, and a switching circuit configured to selectively connect the secondary coil in series to the capacitor in forward and opposite directions.
    Type: Application
    Filed: December 18, 2012
    Publication date: November 19, 2015
    Inventors: YOSHIAKI YAMADA, TAKAYUKI TSUCHIYA, KUNIHIKO HIKIRI, KOICHI ITANI, NORIAKI MIYAKE
  • Publication number: 20150333513
    Abstract: A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a switching element which switches the supply of power to the load from the capacitor, a DC-DC converter which enables a voltage of the capacitor to be stepped up and supplied to the load and a control unit which enables power to be supplied to the load by pulse-controlling the switching element, controlling the DC-DC converter to output a pulse current alternately with the switching element and combining the alternately output pulse currents if the voltage of the capacitor drops below a minimum voltage capable of driving the load.
    Type: Application
    Filed: November 9, 2012
    Publication date: November 19, 2015
    Inventors: YOSHIAKI YAMADA, TAKAYUKI TSUCHIYA, KUNIHIKO HIKIRI, KOICHI ITANI, HIROSHI TOYAMA, NORIAKI MIYAKE
  • Publication number: 20150326066
    Abstract: A power supply device for supplying power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil connected in series to the capacitor and configured such that an induction current flows therein by the accumulated energy from the primary coil.
    Type: Application
    Filed: December 4, 2012
    Publication date: November 12, 2015
    Applicant: VOLVO TRUCK CORPORATION
    Inventors: Yoshiaki YAMADA, Takayuki TSUCHIYA, Kunihiko HIKIRI, Kouichi ITANI, Noriaki MIYAKE
  • Publication number: 20150311831
    Abstract: A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a bypass switch which enables power to be directly supplied to the load from the capacitor by being switched to a connected state when a voltage of the capacitor is a voltage capable of driving the load, and a first DC-DC converter which enables the voltage of the capacitor to be stepped up and supplied to the load when the voltage of the capacitor drops below a minimum voltage capable of driving the load.
    Type: Application
    Filed: November 7, 2012
    Publication date: October 29, 2015
    Inventors: Yoshiaki Yamada, Takayuki Tsuchiya, Kunihiko Hikiri, Koichi Itani, Hiroshi Toyama, Noriaki Miyake
  • Patent number: 8770327
    Abstract: An accessory drive mechanism for a hybrid vehicle, capable of operating accessories irrespective of the travel state of the vehicle, and also capable of smoothly switching between the power which is transmitted from the traveling motor side and the power which is transmitted from the accessory drive motor side. The accessory drive mechanism is provided with a drive power take-off mechanism (20) for taking out the power from a travel drive system (D). An accessory (11) is connected to the drive power take-off mechanism (20). A first one-way clutch (C1) which can transmit the power only to the accessory (11) side is disposed between the drive power take-off mechanism (20) and the accessory (11). An accessory driving motor (an auxiliary motor (12e)) is connected to the side of the accessory (11) which is on the opposite side from the drive power take-off mechanism (20).
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: July 8, 2014
    Assignee: UD Trucks Corporation
    Inventors: Yoshiaki Yamada, Takayuki Tsuchiya, Kunihiko Hikiri
  • Publication number: 20130266828
    Abstract: An electric storage cell includes a casing configured to house an electric storage element and electrolyte, a charging reception antenna connected to the electric storage element and configured to receive electric power transmitted from a power feeding unit in a contactless manner, and a discharging transmission antenna connected to the electric storage element and configured to transmit electric power stored in the electric storage element in a contactless manner. The charging reception antenna and the discharging transmission antenna are arranged in the casing.
    Type: Application
    Filed: November 28, 2011
    Publication date: October 10, 2013
    Inventors: Shigemi Kobayashi, Kunihiko Hikiri, Masayuki Nakane