Patents by Inventor Toshinobu Homan

Toshinobu Homan 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: 20040083748
    Abstract: A vehicle air-conditioning apparatus includes a dehumidification means, which has a compressor and dehumidifies inside of the vehicle, a humidity calculation means, which calculates humidity in the vicinity of an inside surface of the windshield, and a determination means, which determines whether the windshield is fogged on the basis of comparison between the humidity and a predetermined value. A defogging operation for heightening dehumidifying performance of the dehumidification means is performed, when the determination means determines that the windshield is fogged in a state where the compressor is turned on. The dehumidifying performance of the dehumidification means is lowered or condition in which the defogging operation is started is made to be difficult in the next defogging operation, when the windshield is determined to be fogged and the defogging operation is not manually performed in a state where the compressor is turned off.
    Type: Application
    Filed: October 21, 2003
    Publication date: May 6, 2004
    Inventors: Toshinobu Homan, Hiroshi Kishita
  • Publication number: 20040079096
    Abstract: An automobile air conditioning system controls the high pressure of the refrigeration cycle in a wide range of airflows from a low airflow region during an intermediate period to a high airflow region. When a dehumidifying mode is selected, the target high pressure at which the cycle efficiency calculated from a gas cooler outlet refrigerant temperature is maximized is defined as a target value to a valve such as a heating variable throttle valve to control the high pressure of the refrigeration cycle to the target value. This permits control such that the cycle efficiency of the refrigeration cycle is maximized in a wide range of airflow from a low airflow region during an intermediate period to a high airflow region at a relatively low, about 10° C., outside air temperature.
    Type: Application
    Filed: October 21, 2003
    Publication date: April 29, 2004
    Inventors: Satoshi Itoh, Toshinobu Homan, Keiichi Kitamura
  • Publication number: 20040020227
    Abstract: An electric compression device has a motor section and a compressor section contained in a housing, an inverter attached to the outer surface of the housing, and a temperature measurement device for measuring a temperature of the inverter. In a stopped state of a refrigeration cycle system, a control unit drives the motor section when the temperature of the inverter, measured by the temperature measurement device, exceeds a predetermined temperature.
    Type: Application
    Filed: July 30, 2003
    Publication date: February 5, 2004
    Inventors: Tsuyoshi Takemoto, Toshinobu Homan
  • Patent number: 6675597
    Abstract: A vehicle air-conditioning system limits electric power used by an electric motor for a compressor in a prescribed fashion that quickly removes fog from the windows when a defroster mode is selected. When the defroster mode is selected, the limit on the electric power used by the electric motor is lifted, and the number of revolutions of the compressor is set to a high level to raise the dehumidifying and cooling capability to quickly remove moisture from the windows.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: January 13, 2004
    Assignee: Denso Corporation
    Inventors: Hisashi Ieda, Toshinobu Homan, Ken Matsunaga, Yuji Takeo, Mitsuyo Oomura
  • Publication number: 20030209022
    Abstract: A vehicle air-conditioning system limits electric power used by an electric motor for a compressor in a prescribed fashion that quickly removes fog from the windows when a defroster mode is selected. When the defroster mode is selected, the limit on the electric power used by the electric motor is lifted, and the number of revolutions of the compressor is set to a high level to raise the dehumidifying and cooling capability to quickly remove moisture from the windows.
    Type: Application
    Filed: May 5, 2003
    Publication date: November 13, 2003
    Inventors: Hisashi Ieda, Toshinobu Homan, Ken Matsunaga, Yuji Takeo, Mitsuyo Oomura
  • Patent number: 6516621
    Abstract: In a hybrid vehicle including an engine and an electric motor both for running the vehicle, an air conditioner includes a compressor driven by the engine, and an engine controller controls the operation of the engine based on a condition of the air conditioner and a condition of the vehicle except the air conditioner. While the air conditioner performs a defrosting control for a windshield, the engine controller drives the engine irrespective of the condition of the vehicle except the air conditioner. On the other hand, when the defrosting control is not performed, the operation of the engine is controlled in accordance with the condition of the vehicle, for example.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: February 11, 2003
    Assignee: Denso Corporation
    Inventors: Toshinobu Homan, Yuji Takeo, Mitsuyo Oomura, Hiroki Nakamura, Tadashi Nakagawa
  • Patent number: 6518727
    Abstract: In a vehicle having a battery and a generator, when a residual charge amount of the battery is reduced to a first predetermined amount, a power-generation command is output to a generator, and the battery is charged by the generator driven by an engine. When the residual charge amount is reduced to a second predetermined amount lower than the first predetermined amount, plural air-conditioning electrical devices are stopped. Thereafter, when the residual charge amount of the battery is increased to be larger than the second predetermined amount, the electrical devices are started at different start times.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: February 11, 2003
    Assignee: Denso Corporation
    Inventors: Mitsuyo Oomura, Toshinobu Homan, Hiroki Nakamura, Tadashi Nakagawa
  • Patent number: 6515448
    Abstract: In an air conditioner for a hybrid vehicle, when a residual charging degree of a battery becomes equal to or lower than a target degree, the electrical motor generator is driven by a vehicle engine so that the battery is charged through the electrical motor generator. When the engine is driven, the target degree of the battery is set higher than that when the engine is stopped so that a charging operation tends to be required while the engines driven. Accordingly, the frequency for starting the engine only for charging the battery is reduced.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: February 4, 2003
    Assignee: Denso Corporation
    Inventors: Kunio Iritani, Keita Honda, Hisashi Ieda, Ken Matsunaga, Toshinobu Homan, Mitsuyo Oomura, Yuji Takeo
  • Publication number: 20020185546
    Abstract: An air conditioner for a vehicle having a passenger compartment has an electric-powered hot water pump in addition to a mechanical hot water pump driven by an engine mounted on the vehicle. The electric-powered hot water pump is activated while the engine is stopped. However, the electric-powered hot water pump is kept in a non-activation state while an air mix door is positioned in a low temperature side as compared to a predetermined value and an elapsed time after the engine is stopped is within a predetermined time so that power consumption by the electric-powered hot water pump can be decreased suitable for a hybrid vehicle having a driving motor in addition to the engine.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 12, 2002
    Inventors: Toshinobu Homan, Hiroki Nakamura, Tadashi Nakagawa
  • Patent number: 6470697
    Abstract: When an after-evaporation temperature TE remains below the wet-bulb temperature Twet, the compressor 231 is intermittently operated for a predetermined time after the elapse of a first time To from compressor 231 stopping. On the other hand, when the after-evaporation temperature TE is higher than the wet-bulb temperature Twet, the intermittent operation mode stops. This reduces dispersion of offensive smells from the evaporator.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: October 29, 2002
    Assignee: Denso Corporation
    Inventors: Hiroki Nakamura, Hiroshi Nonoyama, Yoshimitsu Inoue, Yuji Takeo, Mitsuyo Oomura, Eiji Takahashi, Toshinobu Homan, Osamu Kasebe
  • Publication number: 20020113576
    Abstract: In a vehicle having a battery and a generator, when a residual charge amount of the battery is reduced to a first predetermined amount, a power-generation command is output to a generator, and the battery is charged by the generator driven by an engine. When the residual charge amount is reduced to a second predetermined amount lower than the first predetermined amount, plural air-conditioning electrical devices are stopped. Thereafter, when the residual charge amount of the battery is increased to be larger than the second predetermined amount, the electrical devices are started at different start times.
    Type: Application
    Filed: February 20, 2002
    Publication date: August 22, 2002
    Inventors: Mitsuyo Oomura, Toshinobu Homan, Hiroki Nakamura, Tadashi Nakagawa
  • Publication number: 20020104324
    Abstract: In a hybrid vehicle including an engine and an electric motor both for running the vehicle, an air conditioner includes a compressor driven by the engine, and an engine controller controls the operation of the engine based on a condition of the air conditioner and a condition of the vehicle except the air conditioner. While the air conditioner performs a defrosting control for a windshield, the engine controller drives the engine irrespective of the condition of the vehicle except the air conditioner. On the other hand, when the defrosting control is not performed, the operation of the engine is controlled in accordance with the condition of the vehicle, for example.
    Type: Application
    Filed: January 15, 2002
    Publication date: August 8, 2002
    Inventors: Toshinobu Homan, Yuji Takeo, Mitsuyo Oomura, Hiroki Nakamura, Tadashi Nakagawa
  • Publication number: 20020084769
    Abstract: In an air conditioner for a hybrid vehicle, when a residual charging degree of a battery becomes equal to or lower than a target degree, the electrical motor generator is driven by a vehicle engine so that the battery is charged through the electrical motor generator. When the engine is driven, the target degree of the battery is set higher than that when the engine is stopped so that a charging operation tends to be required while the engine is driven. Accordingly, the frequency for starting the engine only for charging the battery is reduced.
    Type: Application
    Filed: December 27, 2001
    Publication date: July 4, 2002
    Inventors: Kunio Iritani, Keita Honda, Hisashi Ieda, Ken Matsunaga, Toshinobu Homan, Mitsuyo Oomura, Yuji Takeo
  • Patent number: 6367270
    Abstract: The present invention balances power consumption reduction and a cooling in a vehicle air-conditioning system having a compressor selectively driven by a vehicle engine or a motor while the compressor is driven by the motor. At least one of a capacity of a blower and a capacity of a compressor arranged in a refrigeration cycle R while the compressor being driven by a motor is reduced in comparison to the capacity of the blower and the capacity of the compressor while the compressor being driven by a vehicle engine. Furthermore, while a cooling heat load of an evaporator is greater than a predetermined value, the capacity of the compressor is first reduced prior to reducing the capacity of the blower.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: April 9, 2002
    Assignee: Denso Corporation
    Inventors: Yasuhiko Niimi, Toshinobu Homan
  • Publication number: 20010049943
    Abstract: When an after-evaporation temperature TE remains below the wet-bulb temperature Twet, the compressor 231 is intermittently operated for a predetermined time after the elapse of a first time To from compressor 231 stopping. On the other hand, when the after-evaporation temperature TE is higher than the wet-bulb temperature Twet, the intermittent operation mode stops. This reduces dispersion of offensive smells from the evaporator.
    Type: Application
    Filed: August 3, 2001
    Publication date: December 13, 2001
    Inventors: Hiroki Nakamura, Hiroshi Nonoyama, Yoshimitsu Inoue, Yuji Takeo, Mitsuyo Oomura, Eiji Takahashi, Toshinobu Homan, Osamu Kasebe
  • Publication number: 20010047659
    Abstract: When an after-evaporation temperature TE remains below the wet-bulb temperature Twet, the compressor 231 is intermittently operated for a predetermined time after the elapse of a first time To from compressor 231 stopping. On the other hand, when the after-evaporation temperature TE is higher than the wet-bulb temperature Twet, the intermittent operation mode stops. This reduces dispersion of offensive smells from the evaporator.
    Type: Application
    Filed: April 27, 2001
    Publication date: December 6, 2001
    Inventors: Hiroki Nakamura, Hiroshi Nonoyama, Yoshimitsu Inoue, Yuji Takeo, Mitsuyo Oomura, Eiji Takahashi, Toshinobu Homan, Osamu Kasebe
  • Publication number: 20010005991
    Abstract: The present invention balances power consumption reduction and a cooling in a vehicle air-conditioning system having a compressor selectively driven by a vehicle engine or a motor while the compressor is driven by the motor. At least one of a capacity of a blower and a capacity of a compressor arranged in a refrigeration cycle R while the compressor being driven by a motor is reduced in comparison to the capacity of the blower and the capacity of the compressor while the compressor being driven by a vehicle engine. Furthermore, while a cooling heat load of an evaporator is greater than a predetermined value, the capacity of the compressor is first reduced prior to reducing the capacity of the blower.
    Type: Application
    Filed: December 21, 2000
    Publication date: July 5, 2001
    Inventors: Yasuhiko Niimi, Toshinobu Homan