Patents by Inventor Hirokatsu Amanuma

Hirokatsu Amanuma 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: 8092326
    Abstract: In a motor generator pulley 122, a mechanical clutch 105 and a switching unit 132 are provided such that the mechanical clutch 105 is interposed between a first power transmission unit 104A and a second power transmission unit 104B and can transmit power even when an engine 102 serves as a drive element and a motor generator 103 serves as a drive element and when the motor generator 103 serves as the drive element and the engine 102 serves as the driven element, and that the switching unit 132 can switch, when at least one of the engine 102 and the motor generator 103 serves as a drive element, the mechanical clutch 105 so as to inhibit the engine 102 and the motor generator 103 from being connected to each other.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: January 10, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hirokatsu Amanuma, Yasuaki Hotozuka
  • Publication number: 20090291794
    Abstract: In a motor generator pulley 122, a mechanical clutch 105 and a switching unit 132 are provided such that the mechanical clutch 105 is interposed between a first power transmission unit 104A and a second power transmission unit 104B and can transmit power even when an engine 102 serves as a drive element and a motor generator 103 serves as a drive element and when the motor generator 103 serves as the drive element and the engine 102 serves as the driven element, and that the switching unit 132 can switch, when at least one of the engine 102 and the motor generator 103 serves as a drive element, the mechanical clutch 105 so as to inhibit the engine 102 and the motor generator 103 from being connected to each other.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 26, 2009
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Hirokatsu Amanuma, Yasuaki Hotozuka
  • Patent number: 7472766
    Abstract: A regeneration control system which permits highly efficient regeneration while a vehicle is traveling stably, and also permits regeneration to be performed without interfering with a smooth behavior correction made by a driver when the behavior of the vehicle has been disturbed. The regeneration control system includes a total regeneration amount determiner for determining the total regeneration amount of a first electric motor connected to front wheels and a second electric motor connected to rear wheels, a regeneration amount allocation determiner for determining regeneration amount allocation to each electric motor, a determination value calculator for calculating a determination value based on a steering angle and a yaw rate, and a determiner for determining whether a determination value lies within a predetermined range.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: January 6, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuhisa Yamamoto, Hirokatsu Amanuma, Akihiro Yamamoto
  • Patent number: 7328096
    Abstract: A driving force switching control apparatus in a vehicle which runs by two-wheel drive or four-wheel drive in accordance with the running state. The apparatus includes a device for determining whether the vehicle runs at a constant speed; and a device for determining a drive system of the vehicle running at a constant speed to be the two-wheel drive or the four-wheel drive according to road surface conditions computed using rolling resistance. A threshold value for switching between the two-wheel drive and the four-wheel drive is changed in a manner such that a determination area where the four-wheel drive is selected increases according to increase in the rolling resistance. Sufficient driving force transmitted to the wheels can be secured even when the road surface condition varies, and accordingly, sufficient driving force is secured also when the running condition is changed from constant speed running to acceleration or deceleration running.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: February 5, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hirokatsu Amanuma, Shuji Oshida
  • Patent number: 7216943
    Abstract: A hybrid vehicle is capable of performing regenerative operations of generator-motors disposed adjacently to front wheels and/or rear wheels of the vehicle so as to achieve efficient conversion of kinetic energy of the vehicle into electric energy as much as possible when the vehicle slows down, thereby permitting higher use efficiency of energy. When the vehicle decelerates, a target deceleration force or a target deceleration torque of the vehicle is set, and a permissible maximum value of the braking torque to be imparted to rear wheels from a second generator-motor is set, and the permissible maximum value and the target deceleration torque of the vehicle, whichever is smaller, is set as a target braking torque to be imparted from the second generator-motor to the rear wheels.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: May 15, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryo Nishikawa, Hirokatsu Amanuma, Kazuhisa Yamamoto
  • Patent number: 7118119
    Abstract: A first link mechanism of a suspension is provided at a rear end portion of a vehicle for connecting a drive wheel to a vehicle body, so that the drive wheel performs vertical movements relative to the vehicle body via the first link mechanism. In addition, a shock absorber is attached to a lower arm of the first link mechanism for resiliently supporting the drive wheel relative to the vehicle body. Furthermore, a second link mechanism is provided on the upper arm and the lower arm of the first link mechanism which performs symmetrically vertical movements relative to the vertical movements of the first link mechanism, and a motor is integrally attached to the second link mechanism, whereby inertia energy resulting from the vertical movements of the drive wheel and inertia energy resulting from the vertical movements of the motor are made to be offset against each other.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: October 10, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventor: Hirokatsu Amanuma
  • Patent number: 7100558
    Abstract: A CAT temperature sensor which detects the temperature of a catalyst (catalyst temperature TCAT) is provided in an exhaust purification apparatus of an exhaust pipe, and an exhaust vent temperature sensor which detects the temperature of an exhaust vent (exhaust vent TEND) is provided in near the exhaust vent. A FIECU, in the case where the catalyst temperature TCAT is above a predetermined temperature TCAT1, or in the case where a temperature difference ?T obtained by subtracting the catalyst temperature TCAT from the exhaust vent temperature TEND is above a predetermined temperature difference ?T1, sets the flag value of a flooding determination flag F_INUN to “1”, and sets the flag value of an idle rotation speed increase flag F_INEUP which indicates that a target engine speed in the idle operating state of the internal combustion engine is increased by a predetermined rotation speed, to “1”.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: September 5, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hirokatsu Amanuma, Yusuke Tatara
  • Publication number: 20060102395
    Abstract: A regeneration control system permits highly efficient regeneration while a vehicle is traveling stably, and also permits regeneration to be performed without interfering with a smooth behavior correction made by a driver when the behavior of the vehicle has been disturbed. The regeneration control system includes a total regeneration amount determiner for determining the total regeneration amount of a first electric motor connected to front wheels and a second electric motor connected to rear wheels, a regeneration amount allocation determiner for determining regeneration amount allocation to each electric motor, a determination value calculator for calculating a determination value based on a steering angle and a yaw rate, and a determiner for determining whether a determination value lies within a predetermined range.
    Type: Application
    Filed: November 3, 2005
    Publication date: May 18, 2006
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kazuhisa Yamamoto, Hirokatsu Amanuma, Akihiro Yamamoto
  • Patent number: 6988779
    Abstract: In a hybrid vehicle, an engine is connected to front wheels through a first motor/generator and a transmission, and a second motor/generator is connected to rear wheels. The first and second motors/generators are connected to a battery so that they are driven or regenerated. During regenerative braking of the vehicle, the distribution ratio of regenerative braking forces to the first and second motors/generators is controlled to become an ideal distribution ratio corresponding to a longitudinal acceleration (deceleration) of the vehicle, whereby the distribution ratio of the braking forces to the front and rear wheels can be always maintained at an optimal value during rapid deceleration as well as during slow deceleration of the vehicle, to improve the braking performance.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: January 24, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hirokatsu Amanuma, Tetsu Sugiyama, Shuji Oshida
  • Publication number: 20050228554
    Abstract: A control apparatus for a hybrid vehicle that includes front and rear wheels, a battery, a first driving source that drives one of the front and the rear wheels, a second driving source that drives the other of the front and the rear wheels, the second driving source being operated by an electric energy stored in an electricity storing unit, an electric motor that collects a kinetic energy during deceleration of the vehicle to charge the electricity storing unit, includes: a deceleration state detecting unit that detects a deceleration state of the vehicle; a turning state detecting unit that detects a turning state of the vehicle, wherein a regenerated power by the electric motor is calculated according to the deceleration state detected by the deceleration state detecting unit and the turning state detected by the turning state detecting unit, and the electric motor is controlled according to the regenerated power.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 13, 2005
    Inventors: Akihiro Yamamoto, Hirokatsu Amanuma, Kazuhisa Yamamoto
  • Patent number: 6932738
    Abstract: When a hybrid vehicle picks up speed, the torque of a first motor is gradually reduced based on a vehicle speed before the vehicle speed reaches a vehicle speed threshold. When the vehicle speed is equal to or greater than the vehicle speed threshold, the torque of the first motor is reduced to zero. If the vehicle speed is equal to or greater than the vehicle speed threshold, then a third clutch connected to the first motor is disengaged.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: August 23, 2005
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takashi Aoki, Hirokatsu Amanuma, Osamu Saito
  • Publication number: 20050173179
    Abstract: A driving force switching control apparatus in a vehicle which runs by two-wheel drive or four-wheel drive in accordance with the running state. The apparatus includes a device for determining whether the vehicle runs at a constant speed; and a device for determining a drive system of the vehicle running at a constant speed to be the two-wheel drive or the four-wheel drive according to road surface conditions computed using rolling resistance. A threshold value for switching between the two-wheel drive and the four-wheel drive is changed in a manner such that a determination area where the four-wheel drive is selected increases according to increase in the rolling resistance. Sufficient driving force transmitted to the wheels can be secured even when the road surface condition varies, and accordingly, sufficient driving force is secured also when the running condition is changed from constant speed running to acceleration or deceleration running.
    Type: Application
    Filed: January 28, 2005
    Publication date: August 11, 2005
    Inventors: Hirokatsu Amanuma, Shuji Oshida
  • Publication number: 20050099146
    Abstract: A hybrid vehicle is capable of performing regenerative operations of generator-motors disposed adjacently to front wheels and/or rear wheels of the vehicle so as to achieve efficient conversion of kinetic energy of the vehicle into electric energy as much as possible when the vehicle slows down, thereby permitting higher use efficiency of energy. When the vehicle decelerates, a target deceleration force or a target deceleration torque of the vehicle is set, and a permissible maximum value of the braking torque to be imparted to rear wheels from a second generator-motor is set, and the permissible maximum value and the target deceleration torque of the vehicle, whichever is smaller, is set as a target braking torque to be imparted from the second generator-motor to the rear wheels.
    Type: Application
    Filed: November 10, 2004
    Publication date: May 12, 2005
    Inventors: Ryo Nishikawa, Hirokatsu Amanuma, Kazuhisa Yamamoto
  • Publication number: 20050045134
    Abstract: A CAT temperature sensor which detects the temperature of a catalyst (catalyst temperature TCAT) is provided in an exhaust purification apparatus of an exhaust pipe, and an exhaust vent temperature sensor which detects the temperature of an exhaust vent (exhaust vent TEND) is provided in near the exhaust vent. A FIECU, in the case where the catalyst temperature TCAT is above a predetermined temperature TCAT1, or in the case where a temperature difference AT obtained by subtracting the catalyst temperature TCAT from the exhaust vent temperature TEND is above a predetermined temperature difference ?T1, sets the flag value of a flooding determination flag F_INUN to “1”, and sets the flag value of an idle rotation speed increase flag F_INEUP which indicates that a target engine speed in the idle operating state of the internal combustion engine is increased by a predetermined rotation speed, to “1”.
    Type: Application
    Filed: August 5, 2004
    Publication date: March 3, 2005
    Inventors: Hirokatsu Amanuma, Yusuke Tatara
  • Publication number: 20040238244
    Abstract: In a hybrid vehicle, an engine is connected to front wheels through a first motor/generator and a transmission, and a second motor/generator is connected to rear wheels. The first and second motors/generators are connected to a battery so that they are driven or regenerated. During regenerative braking of the vehicle, the distribution ratio of regenerative braking forces to the first and second motors/generators is controlled to become an ideal distribution ratio corresponding to a longitudinal acceleration (deceleration) of the vehicle, whereby the distribution ratio of the braking forces to the front and rear wheels can be always maintained at an optimal value during rapid deceleration as well as during slow deceleration of the vehicle, to improve the braking performance.
    Type: Application
    Filed: November 6, 2003
    Publication date: December 2, 2004
    Inventors: Hirokatsu Amanuma, Tetsu Sugiyama, Shuji Oshida
  • Publication number: 20040147366
    Abstract: When a hybrid vehicle picks up speed, the torque of a first motor is gradually reduced based on a vehicle speed before the vehicle speed reaches a vehicle speed threshold. When the vehicle speed is equal to or greater than the vehicle speed threshold, the torque of the first motor is reduced to zero. If the vehicle speed is equal to or greater than the vehicle speed threshold, then a third clutch connected to the first motor is disengaged.
    Type: Application
    Filed: December 19, 2003
    Publication date: July 29, 2004
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takashi Aoki, Hirokatsu Amanuma, Osamu Saito
  • Patent number: 6767310
    Abstract: There is provided a control system for a front-and-rear wheel drive vehicle which connects and disconnects one pair of respective pairs of front wheels and rear wheels to and from an electric motor for driving the one pair of wheels by a clutch of a type actuated by pressure. The control system is capable of engaging the clutch promptly and reliably, thereby enabling excellent startability of the vehicle and a sufficient total driving force for the vehicle. In the control system, the front wheels are driven by an engine, the rear wheels are driven by the electric motor via the clutch, and the clutch is actuated by accumulator pressure, whereby the rear wheels and the electric motor are connected to and disconnected from each other. The control system increases the accumulator pressure by driving an electric oil pump when the accumulator pressure is equal to or lower than an operating pressure.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: July 27, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hirokatsu Amanuma, Yasuhiko Sugo
  • Publication number: 20040135527
    Abstract: A road situation is estimated. If in a slipping state (a wheel slip flag F_SLIP=1) or if an output changing switch is turned on by the driver of a hybrid vehicle, a second motor is energized based on a 4WD-oriented rear motor drive power map to avoid the slip. At the same time, a first motor is driven to generate electric power based on a 4WD-mode front motor charging map, thereby energizing the second motor.
    Type: Application
    Filed: December 22, 2003
    Publication date: July 15, 2004
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yusuke Tatara, Kazuhisa Yamamoto, Hirokatsu Amanuma
  • Publication number: 20040094928
    Abstract: A first link mechanism of a suspension is provided at a rear end portion of a vehicle for connecting a drive wheel to a vehicle body, so that the drive wheel performs vertical movements relative to the vehicle body via the first link mechanism. In addition, a shock absorber is attached to a lower arm of the first link mechanism for resiliently supporting the drive wheel relative to the vehicle body. Furthermore, a second link mechanism is provided on the upper arm and the lower arm of the first link mechanism which performs symmetrically vertical movements relative to the vertical movements of the first link mechanism, and a motor is integrally attached to the second link mechanism, whereby inertia energy resulting from the vertical movements of the drive wheel and inertia energy resulting from the vertical movements of the motor are made to be offset against each other.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 20, 2004
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Hirokatsu Amanuma
  • Patent number: 6704627
    Abstract: A drive force distribution apparatus for a hybrid vehicle having an engine for driving a pair of first drive wheels and an electric motor for driving a pair of second drive wheels. The drive force distribution apparatus includes a first clutch, a second clutch, and a battery. The apparatus further includes a first unit for deciding the distribution between a drive for driving the first drive wheels and a drive force for driving the second drive wheels, a second unit for deciding the distribution between a drive force for driving one of the second drive wheels and a drive force for driving the other of the second drive wheels according to a detected vehicle speed, steering angle, and yaw rate, and a clutch control unit for controlling a degree of engagement of each of the first and second clutches according to the distribution decided by the second unit.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: March 9, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yusuke Tatara, Hirokatsu Amanuma, Kazuhiko Kitano