Patents by Inventor Taiji Maruyama

Taiji Maruyama 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: 7311633
    Abstract: A vehicular drive unit comprises a central differential mechanism and a front-wheel side axle differential mechanism. The central differential mechanism comprises a first planetary gear train 10, which includes an output gear body 50, a first carrier 13, which is provided in a one-piece body with this gear body, a first sun gear 11, a first ring gear 14, and a rear-wheel drive gear 15, which is a helical gear formed around this ring gear in a one-piece body. In this drive unit, a differential limiter C is provided between the output gear body 50 (input rotating member) and a drive gear body 55 (output rotating member) to generate a rotational resistance, which acts to reduce the rotational difference between the output gear body 50 and the drive gear body 55.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: December 25, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventors: Taiji Maruyama, Kanji Kita, Mikihiro Takano, Kazunori Miyata
  • Publication number: 20060100054
    Abstract: A vehicular drive unit comprises a central differential mechanism and a front-wheel side axle differential mechanism. The central differential mechanism comprises a first planetary gear train 10, which includes an output gear body 50, a first carrier 13, which is provided in a one-piece body with this gear body, a first sun gear 11, a first ring gear 14, and a rear-wheel drive gear 15, which is a helical gear formed around this ring gear in a one-piece body. In this drive unit, a differential limiter C is provided between the output gear body 50 (input rotating member) and a drive gear body 55 (output rotating member) to generate a rotational resistance, which acts to reduce the rotational difference between the output gear body 50 and the drive gear body 55.
    Type: Application
    Filed: December 20, 2005
    Publication date: May 11, 2006
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Taiji Maruyama, Kanji Kita, Mikihiro Takano, Kazunori Miyata
  • Patent number: 6729423
    Abstract: A motor generator has a rotor directly coupled to a crankshaft and a stator disposed around the rotor. A shield plate is disposed between coils of the stator and an internal combustion engine. A first partition and a second partition are disposed between the coils and a flywheel positioned adjacent to a clutch mechanism.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: May 4, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Makoto Kobayashi, Taiji Maruyama, Shigekazu Tanaka
  • Patent number: 6726591
    Abstract: The four-wheel drive system for vehicles has a center differential mechanism that divides the rotational driving force from the engine E between the front and rear wheels, and a front wheel side axle differential mechanism that divides this divided rotational driving force between the left and right front wheels. The center differential mechanism is constructed from a single pinion type first planetary gear device which has a first carrier 13 that receives the rotational driving force from the engine E, a first sun gear 11, and a first ring gear 14 that is connected to the rear wheel side, and the axle differential mechanism is constructed from a double pinion type second planetary gear device which has a second ring gear 24 that is connected to the first sun gear 11, a second sun gear 21 that is connected to the right front wheel, and a second carrier 23 that is connected to the left front wheel. The first and second planetary gear devices are disposed adjacent to each other in a coaxial configuration.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: April 27, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Taiji Maruyama, Tetsurou Hamada, Kanji Kita
  • Patent number: 6640917
    Abstract: A power transmission mechanism which is capable of employing one electric motor as a drive source for driving drive wheels and as a drive source for cranking an engine, thereby making it possible to reduce manufacturing costs of the hybrid vehicle, and preventing the motor from offering an extra rotational resistance to the engine when the drive wheels are being driven by the engine, thereby making it possible to enhance fuel economy.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: November 4, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Taiji Maruyama
  • Patent number: 6540636
    Abstract: A power transmission mechanism for a front and rear-wheel drive vehicle in which the power of an electric motor is transmitted to rear wheels includes an output shaft adapted to rotate together with the electric motor, a middle shaft which is parallel with the output shaft, a drive shaft which is parallel with the output shaft and is adapted to rotate together with the rear wheels, a first pair of reduction gears for reducing the speed of rotation of the middle shaft relative to the output shaft, a second pair of reduction gears for reducing the speed of rotation of the drive shaft relative to the middle shaft and a rear differential disposed closer to an electric motor side than the second pair of reduction gears and coupled to the reduction gear and the drive shaft.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: April 1, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hirokatsu Amanuma, Naoki Uchiyama, Kenji Honda, Taiji Maruyama
  • Patent number: 6533701
    Abstract: A vehicle clutch engagement condition determining apparatus determines the engagement condition of a clutch for disengaging an engine from a transmission. This determining apparatus estimates a motor speed corresponding value through an ECU, sets the motor speed corresponding value to the target speed of an electric motor when a gear shift lever of the transmission is operated, determines a control current value for controlling the speed of the electric motor so that the speed of the electric motor detected matches the target speed while drive wheels are driven by the electric motor and determines the engagement condition of the clutch based on an electric current deviation.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: March 18, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Taiji Maruyama
  • Publication number: 20030024749
    Abstract: A motor generator has a rotor directly coupled to a crankshaft and a stator disposed around the rotor. A shield plate is disposed between coils of the stator and an internal combustion engine. A first partition and a second partition are disposed between the coils and a flywheel positioned adjacent to a clutch mechanism.
    Type: Application
    Filed: September 30, 2002
    Publication date: February 6, 2003
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Makoto Kobayashi, Taiji Maruyama, Shigekazu Tanaka
  • Publication number: 20030024753
    Abstract: The four-wheel drive system for vehicles has a center differential mechanism that divides the rotational driving force from the engine E between the front and rear wheels, and a front wheel side axle differential mechanism that divides this divided rotational driving force between the left and right front wheels. The center differential mechanism is constructed from a single pinion type first planetary gear device which has a first carrier 13 that receives the rotational driving force from the engine E, a first sun gear 11, and a first ring gear 14 that is connected to the rear wheel side, and the axle differential mechanism is constructed from a double pinion type second planetary gear device which has a second ring gear 24 that is connected to the first sun gear 11, a second sun gear 21 that is connected to the right front wheel, and a second carrier 23 that is connected to the left front wheel. The first and second planetary gear devices are disposed adjacent to each other in a coaxial configuration.
    Type: Application
    Filed: July 15, 2002
    Publication date: February 6, 2003
    Inventors: Taiji Maruyama, Tetsurou Hamada, Kanji Kita
  • Patent number: 6481517
    Abstract: A motor generator has a rotor directly coupled to a crankshaft and a stator disposed around the rotor. A shield plate is disposed between coils of the stator and an internal combustion engine. A first partition and a second partition are disposed between the coils and a flywheel positioned adjacent to a clutch mechanism.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: November 19, 2002
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Makoto Kobayashi, Taiji Maruyama, Shigekazu Tanaka
  • Publication number: 20020060114
    Abstract: A vehicle clutch engagement condition determining apparatus determines the engagement condition of a clutch for disengaging an engine from a transmission. This determining apparatus estimates a motor speed corresponding value through an ECU, sets the motor speed corresponding value to the target speed of an electric motor when a gear shift lever of the transmission is operated, determines a control current value for controlling the speed of the electric motor so that the speed of the electric motor detected matches the target speed while drive wheels are driven by the electric motor and determines the engagement condition of the clutch based on an electric current deviation.
    Type: Application
    Filed: November 19, 2001
    Publication date: May 23, 2002
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Taiji Maruyama
  • Publication number: 20020061801
    Abstract: A power transmission mechanism for a front and rear-wheel drive vehicle in which the power of an electric motor is transmitted to rear wheels includes an output shaft adapted to rotate together with the electric motor, a middle shaft which is parallel with the output shaft, a drive shaft which is parallel with the output shaft and is adapted to rotate together with the rear wheels, a firs pair of reduction gears for reducing the speed of rotation of the middle shaft relative to the output shaft, a second pair of reduction gears for reducing the speed of rotation of the drive shaft relative to the middle shaft and a rear differential disposed closer to an electric motor side than the second pair of reduction gears and coupled to the reduction gear and the drive shaft.
    Type: Application
    Filed: November 19, 2001
    Publication date: May 23, 2002
    Applicant: Honda Giken Kogyo Kabushiki Kaisha,
    Inventors: Hirokatsu Amanuma, Naoki Uchiyama, Kenji Honda, Taiji Maruyama
  • Publication number: 20020040818
    Abstract: There is provided a power transmission mechanism which is capable of employing one electric motor as a drive source for driving drive wheels and as a drive source for cranking an engine, thereby making it possible to reduce manufacturing costs of the hybrid vehicle, and preventing the motor from offering an extra rotational resistance to the engine when the drive wheels are being driven by the engine, thereby making it possible to enhance fuel economy.
    Type: Application
    Filed: October 10, 2001
    Publication date: April 11, 2002
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Taiji Maruyama