Patents by Inventor Hiroshi Tsunehara

Hiroshi Tsunehara 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: 7914085
    Abstract: In brake control system and method for an automotive vehicle, a vehicle body deceleration increment correction quantity is set to zero during a start of braking, the vehicle body deceleration increment correction quantity is set to be gradually larger along with at least one of a decrease in the traveling velocity of the vehicle and an increase in a braking passage time in a first region in which a traveling velocity of the vehicle is equal to or higher than a first predetermined traveling velocity, and the vehicle body deceleration increment correction quantity is set to a substantially constant value in a second region in which the traveling velocity of the vehicle is lower than the first predetermined traveling velocity.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: March 29, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Patent number: 7748794
    Abstract: In braking force control method for an automotive vehicle and braking force control apparatus therefor, contribution degrees of both of a stroke quantity of a brake input device and a master cylinder pressure developed in a master cylinder are set in accordance with at least one of the stroke quantity of the brake input device and the master cylinder pressure and the contribution degree of the master cylinder pressure on a calculation of a target braking force is set to become larger when an abrupt brake operation by a vehicle driver is detected (a control flag F is set to “1”) than the contribution degree of the master cylinder pressure when no abrupt brake operation by the vehicle driver is detected (control flag F is reset to “0”).
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: July 6, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Tsunehara, Hidetoshi Suzuki
  • Patent number: 7290840
    Abstract: A brake system for a vehicle is comprised of a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver, and a second brake system that apply a braking force to other wheels according to at least a braking state of the first brake system.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: November 6, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Tsunehara, Hideto Murakami, Takaaki Eguchi, Masanori Hara
  • Patent number: 7244002
    Abstract: A brake-by-wire type vehicle brake system is arranged to return a piston of a master cylinder to a normal position by opening a shutoff valve so as to supply a hydraulic pressure of a pump to the master cylinder when the shutoff valve is closed and a stroke simulator is put in shutoff state and to close the shutoff valve when the stroke simulator is put in communicating state by returning the pistons of the master cylinder to the normal position.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: July 17, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Publication number: 20070016352
    Abstract: In braking force control method for an automotive vehicle and braking force control apparatus therefor, contribution degrees of both of a stroke quantity of a brake input device and a master cylinder pressure developed in a master cylinder are set in accordance with at least one of the stroke quantity of the brake input device and the master cylinder pressure and the contribution degree of the master cylinder pressure on a calculation of a target braking force is set to become larger when an abrupt brake operation by a vehicle driver is detected (a control flag F is set to “1”) than the contribution degree of the master cylinder pressure when no abrupt brake operation by the vehicle driver is detected (control flag F is reset to “0”).
    Type: Application
    Filed: December 21, 2005
    Publication date: January 18, 2007
    Inventors: Hiroshi Tsunehara, Hidetoshi Suzuki
  • Patent number: 7121367
    Abstract: An installation structure for an electric rotating machine such as an electric motor to a wheel of a motor vehicle. The installation structure comprises a wheel hub fixed to and rotatable with the wheel. A bearing through which the wheel hub is rotatably supported is provided. A suspension is installed between a vehicle body of the motor vehicle and the wheel. A bearing support member is connected to a wheel-side section of the suspension and supports the bearing. In the above installation structure, the electric rotating machine includes a power output shaft which is in fit with the wheel hub, and a flange for location of the electric rotating machine in a direction of axis of the power output shaft, the flange being brought into contact with a wheel-side section of the bearing support member.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: October 17, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Keigo Ajiro, Hiroshi Tsunehara
  • Publication number: 20060163942
    Abstract: A brake system for a vehicle is comprised of a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver, and a second brake system that apply a braking force to other wheels according to at least a braking state of the first brake system.
    Type: Application
    Filed: March 27, 2006
    Publication date: July 27, 2006
    Inventors: Hiroshi Tsunehara, Hideto Murakami, Takaaki Eguchi, Masanori Hara
  • Patent number: 7059691
    Abstract: A brake system for a vehicle is comprised of a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver, and a second brake system that apply a braking force to other wheels according to at least a braking state of the first brake system.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: June 13, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Tsunehara, Hideto Murakami, Takaaki Eguchi, Masanori Hara
  • Patent number: 6959971
    Abstract: A vehicle braking apparatus is provided that basically comprises a hydraulic braking apparatus, an electric braking apparatus and a regenerative braking apparatus. The hydraulic braking apparatus is configured and arranged to apply a hydraulic braking force on at least one first wheel subject to a first braking system. The electric braking apparatus is configured and arranged to apply an electric braking force on at least one second wheel subject to a second braking system that is different from the first braking system. The regenerative braking apparatus is configured and arranged to apply a regenerative braking force on one of the first and second wheels subject to a corresponding one of the first and second braking systems. The vehicle braking apparatus enables the battery for an electric braking apparatus to be more compact while also enabling regenerated electric power to be used for braking.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: November 1, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Publication number: 20050225170
    Abstract: In brake control system and method for an automotive vehicle, a vehicle body deceleration increment correction quantity is set to zero during a start of braking, the vehicle body deceleration increment correction quantity is set to be gradually larger along with at least one of a decrease in the traveling velocity of the vehicle and an increase in a braking passage time in a first region in which a traveling velocity of the vehicle is equal to or higher than a first predetermined traveling velocity, and the vehicle body deceleration increment correction quantity is set to a substantially constant value in a second region in which the traveling velocity of the vehicle is lower than the first predetermined traveling velocity.
    Type: Application
    Filed: April 4, 2005
    Publication date: October 13, 2005
    Inventor: Hiroshi Tsunehara
  • Patent number: 6910747
    Abstract: A vehicle braking control system is provided that controls at least three braking devices including a regenerative braking device, a hydraulic braking device and an electric braking device. The vehicle braking control system basically comprises a braking mode selecting section, a required braking force determining section and a target braking force setting section. The braking mode selecting section sets one of a plurality of braking modes having a different braking control priority for each of the target braking forces. The required braking force determining section determines a required braking force for an entire vehicle. The target braking force setting section sets each of the target braking forces based on the braking control priority of the selected braking mode to produce the required braking force for the entire vehicle. Preferably, the braking mode selecting section set at least an electric power maintenance priority mode and a braking response priority mode.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: June 28, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Publication number: 20050110338
    Abstract: A brake-by-wire type vehicle brake system is arranged to return a piston of a master cylinder to a normal position by opening a shutoff valve so as to supply a hydraulic pressure of a pump to the master cylinder when the shutoff valve is closed and a stroke simulator is put in shutoff state and to close the shutoff valve when the stroke simulator is put in communicating state by returning the pistons of the master cylinder to the normal position.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 26, 2005
    Inventor: Hiroshi Tsunehara
  • Publication number: 20040212245
    Abstract: A brake system for a vehicle is comprised of a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver, and a second brake system that apply a braking force to other wheels according to at least a braking state of the first brake system.
    Type: Application
    Filed: April 23, 2004
    Publication date: October 28, 2004
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi Tsunehara, Hideto Murakami, Takaaki Eguchi, Masanori Hara
  • Publication number: 20040112657
    Abstract: An installation structure for an electric rotating machine such as an electric motor to a wheel of a motor vehicle. The installation structure comprises a wheel hub fixed to and rotatable with the wheel. A bearing through which the wheel hub is rotatably supported is provided. A suspension is installed between a vehicle body of the motor vehicle and the wheel. A bearing support member is connected to a wheel-side section of the suspension and supports the bearing. In the above installation structure, the electric rotating machine includes a power output shaft which is in fit with the wheel hub, and a flange for location of the electric rotating machine in a direction of axis of the power output shaft, the flange being brought into contact with a wheel-side section of the bearing support member.
    Type: Application
    Filed: November 4, 2003
    Publication date: June 17, 2004
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Keigo Ajiro, Hiroshi Tsunehara
  • Publication number: 20040108771
    Abstract: A vehicle braking control system is provided that controls at least three braking devices including a regenerative braking device, a hydraulic braking device and an electric braking device. The vehicle braking control system basically comprises a braking mode selecting section, a required braking force determining section and a target braking force setting section. The braking mode selecting section sets one of a plurality of braking modes having a different braking control priority for each of the target braking forces. The required braking force determining section determines a required braking force for an entire vehicle. The target braking force setting section sets each of the target braking forces based on the braking control priority of the selected braking mode to produce the required braking force for the entire vehicle. Preferably, the braking mode selecting section set at least an electric power maintenance priority mode and a braking response priority mode.
    Type: Application
    Filed: October 6, 2003
    Publication date: June 10, 2004
    Applicant: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Publication number: 20040090116
    Abstract: A vehicle braking apparatus is provided that basically comprises a hydraulic braking apparatus, an electric braking apparatus and a regenerative braking apparatus. The hydraulic braking apparatus is configured and arranged to apply a hydraulic braking force on at least one first wheel subject to a first braking system. The electric braking apparatus is configured and arranged to apply an electric braking force on at least one second wheel subject to a second braking system that is different from the first braking system. The regenerative braking apparatus is configured and arranged to apply a regenerative braking force on one of the first and second wheels subject to a corresponding one of the first and second braking systems. The vehicle braking apparatus enables the battery for an electric braking apparatus to be more compact while also enabling regenerated electric power to be used for braking.
    Type: Application
    Filed: September 11, 2003
    Publication date: May 13, 2004
    Applicant: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Patent number: 6308127
    Abstract: In driving force controlling apparatus and method for a vehicle, the driving force controlling apparatus includes: a driver's demanding torque setting device that sets a driver's demanding torque; a slip condition detector to detect a slip condition of vehicular road wheels; a target engine torque setting device that sets a target engine torque in accordance with the slip condition; a driving force control execution determining section that determines whether the driving force control should be executed in accordance with the slip condition; and an engine output torque determining section that gives a determination of an output torque developed by an engine of the vehicle on the basis of the driver's demanding torque and the target engine torque, the engine output torque determining section determining the engines output torque determining section determining the engine output torque in accordance with the driver's demanding torque when the driving force control execution determining secti
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: October 23, 2001
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Tsunehara
  • Patent number: 6208921
    Abstract: A vehicle behavior control system comprises a controller for determining a sensed steering angle from a steering amount signal and a neutral detection signal from a steering angle sensor, and performs a behavior control operation to reduce a deviation of a sensed actual motion variable such as a vehicle yaw rate from a target motion variable determined from the sensed steering angle. When the neutral detection signal is not available just after a start of the engine, the controller determines the target motion variable from an estimated steering angle instead of the sensed steering angle, and immediately starts controlling the vehicle behavior without delay by, for example, controlling the braking forces of the individual wheels.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: March 27, 2001
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Tsunehara, Yoshiki Yasuno, Kensuke Fukuyama
  • Patent number: 6122574
    Abstract: A method of detecting an abnormality of a control unit arranged to execute a writing process and a reading process of data between a CPU and EEPROM. The method measures a time period of the reading process and informs that an abnormality of a system is generated when the reading process time period becomes greater than a predetermined value.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: September 19, 2000
    Assignees: Unisia Jecs Corporation, Nissan Motor Co., Ltd.
    Inventors: Nobuyuki Ohtsu, Masaru Yamashita, Hiroshi Tsunehara