Patents by Inventor Keiichiro Nagatsuka

Keiichiro Nagatsuka 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: 9399449
    Abstract: A vehicle travel control device includes a control instruction value calculation unit, a driver acceleration intent quantification unit, and a control instruction value correction determination unit that determines whether correction of a control instruction value is required in response to a quantified driver's acceleration intent. The vehicle travel control device also includes a control instruction value correction unit that corrects the control instruction value in response to a correction determination result of the control instruction value correction determination unit. The driver acceleration intent quantification unit quantifies the driver's acceleration intent using an integral value of the longitudinal jerk occurring according to the brake operation of the driver.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: July 26, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Keiichiro Nagatsuka, Makoto Yamakado, Mitsuhide Sasaki, Mikio Ueyama
  • Patent number: 9352747
    Abstract: A vehicle travel control system includes a first unit configured to calculate a target longitudinal acceleration/deceleration control command of the own vehicle based on a distance or a relative speed between the own vehicle and a forward obstacle, traveling route information from a vehicle navigation system or a Global Positioning System, and input information such as a vehicle speed set by a driver; a second unit configured to calculate a target longitudinal acceleration/deceleration control command according to a lateral jerk that acts on the own vehicle; and an arbitration unit configured to perform, based on the target longitudinal acceleration/deceleration control command calculated by the second unit, arbitration of the target longitudinal acceleration/deceleration control command calculated by the first unit, wherein output from the arbitration unit is set as a command to control the target longitudinal acceleration/deceleration control command of the own vehicle.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: May 31, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Keiichiro Nagatsuka, Makoto Yamakado, Mitsuhide Sasaki, Mikio Ueyama
  • Patent number: 9296374
    Abstract: Provided is a motion controlling apparatus for a vehicle that can achieve improvement in drivability, stability, and driving comfort. The apparatus includes a control unit for controlling driving forces of vehicle wheels; a vehicle acceleration/deceleration instruction calculator for calculating an acceleration/deceleration instruction value on the basis of a lateral jerk; a first vehicle yaw moment instruction calculator for calculating a first vehicle yaw moment instruction value on the basis of the lateral jerk; and a second vehicle yaw moment instruction calculator for calculating a second vehicle yaw moment instruction value on the basis of lateral slip information.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: March 29, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Makoto Yamakado, Mitsuhide Sasaki, Mikio Ueyama, Keiichiro Nagatsuka
  • Publication number: 20160059852
    Abstract: In order to reliably assist a driver in emergency detour steering without causing a jerking forward motion of the vehicle during normal operation, a vehicle motion control device includes: a risk potential estimator that estimates a risk potential of a vehicle based on input external information and vehicle information; a vehicle longitudinal motion controller that generates a longitudinal motion control command of the vehicle based on a vehicle lateral jerk and a predetermined gain; and a gain adjustor that adjusts the gain, in which the gain adjustor adjusts the gain based on the risk potential estimated by the risk potential estimator.
    Type: Application
    Filed: January 24, 2014
    Publication date: March 3, 2016
    Inventors: Makoto YAMAKADO, Mitsuhide SASAKI, Mikio UEYAMA, Keiichiro NAGATSUKA
  • Publication number: 20150367852
    Abstract: Disclosed is a vehicle motion control system that can control a vehicle without making a driver feel uncomfortable.
    Type: Application
    Filed: December 20, 2013
    Publication date: December 24, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Keiichiro Nagatsuka, Makoto Yamakado, Mikio Ueyama, Mitsuhide Sasaki
  • Publication number: 20150298696
    Abstract: A vehicle travel control system includes a first unit configured to calculate a target longitudinal acceleration/deceleration control command of the own vehicle based on a distance or a relative speed between the own vehicle and a forward obstacle, traveling route information from a vehicle navigation system or a Global Positioning System, and input information such as a vehicle speed set by a driver; a second unit configured to calculate a target longitudinal acceleration/deceleration control command according to a lateral jerk that acts on the own vehicle; and an arbitration unit configured to perform, based on the target longitudinal acceleration/deceleration control command calculated by the second unit, arbitration of the target longitudinal acceleration/deceleration control command calculated by the first unit, wherein output from the arbitration unit is set as a command to control the target longitudinal acceleration/deceleration control command of the own vehicle.
    Type: Application
    Filed: January 21, 2013
    Publication date: October 22, 2015
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Keiichiro NAGATSUKA, Makoto YAMAKADO, Mitsuhide SASAKI, Mikio UEYAMA
  • Publication number: 20150239442
    Abstract: Provided is a motion controlling apparatus for a vehicle that can achieve improvement in drivability, stability, and driving comfort. The apparatus includes a control unit for controlling driving forces of vehicle wheels; a vehicle acceleration/deceleration instruction calculator for calculating an acceleration/deceleration instruction value on the basis of a lateral jerk; a first vehicle yaw moment instruction calculator for calculating a first vehicle yaw moment instruction value on the basis of the lateral jerk; and a second vehicle yaw moment instruction calculator for calculating a second vehicle yaw moment instruction value on the basis of lateral slip information.
    Type: Application
    Filed: September 20, 2013
    Publication date: August 27, 2015
    Inventors: Makoto Yamakado, Mitsuhide Sasaki, Mikio Ueyama, Keiichiro Nagatsuka
  • Publication number: 20150166025
    Abstract: Provided is a vehicle travel control device (100) that can control a vehicle without causing discomfort to a driver based on a brake operation of the driver, the vehicle travel control device (100) including a control instruction computation unit (114).
    Type: Application
    Filed: May 29, 2013
    Publication date: June 18, 2015
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Keiichiro Nagatsuka, Makoto Yamakado, Mitsuhide Sasaki, Mikio Ueyama
  • Patent number: 7508337
    Abstract: The radar apparatus of the present invention can obtain distance to a target and speed with higher accuracy even when multiple targets are running within a detecting field of a radar. The radar apparatus can transmit a radio wave by alternately switching a section having a frequency slope and a section having no frequency slope with the radar for simultaneously transmitting a couple of frequencies having a frequency difference. Measurement of distance to the target and relative speed is conducted in the above two sections, results of measurement are compared with each other in the adjacent sections, and the result of measurement is determined correct only when there is no inconsistency in these measurement results.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: March 24, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Mitsutoshi Morinaga, Keiichiro Nagatsuka
  • Publication number: 20080122680
    Abstract: The radar apparatus of the present invention can obtain distance to a target and speed with higher accuracy even when multiple targets are running within a detecting field of a radar. The radar apparatus can transmit a radio wave by alternately switching a section having a frequency slope and a section having no frequency slope with the radar for simultaneously transmitting a couple of frequencies having a frequency difference. Measurement of distance to the target and relative speed is conducted in the above two sections, results of measurement are compared with each other in the adjacent sections, and the result of measurement is determined correct only when there is no inconsistency in these measurement results.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 29, 2008
    Inventors: Mitsutoshi Morinaga, Keiichiro Nagatsuka