Patents by Inventor Shotaro Fukuda

Shotaro Fukuda 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: 20100121549
    Abstract: An apparatus is provided for controlling acceleration of a vehicle to a target acceleration. In the apparatus, a target acceleration calculator calculates the target acceleration. A provisional acceleration setting unit sets a provisional target acceleration such that a change rate of the provisional target acceleration is limited to a target limitation value. The provisional target acceleration is used during a step during which the acceleration of the vehicle is changed to the target acceleration. A drive power calculator calculates a drive power to obtain the provisional target acceleration. In the provisional acceleration setting unit, an initial value of the provisional target acceleration depends on a running state of the vehicle.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 13, 2010
    Applicants: DENSO CORPORATION, ADVICS CO., LTD.
    Inventors: Shotaro FUKUDA, Yasuhiro NAKAI, Satoshi NIWA, Hajime KUMABE, Motoaki UMAKOSHI, Masayoshi TAKEDA, Yukio MORI
  • Publication number: 20100009807
    Abstract: In a vehicle control device, a brake feedback control unit calculates a brake feedback torque Tfb-BK using a PID control model when a current state is a brake feedback use state. The brake feedback control unit stops the calculation of the brake feedback torque Tfb-BK when the current state is a brake feedback limitation state, and stores as an output value the brake feedback torque Tfb-BK that is output at a brake limitation start timing. At a brake limitation release timing, the brake feedback control unit restarts the feedback control using the stored brake feedback torque Tfb-BK as an initial value. The brake mechanism can thereby generate a predetermined brake torque of not more than 0 [N·m] immediately after the brake limitation release timing.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 14, 2010
    Applicants: Denso Corporation, Advics Co., Ltd.
    Inventors: Motoaki Umakoshi, Shotaro Fukuda, Hajime Kumabe, Masayoshi Takeda, Yukio Mori
  • Publication number: 20090055068
    Abstract: A vehicle drive control device includes an initially determined request acceleration calculation means for calculating an initially determined request acceleration, an automatic drive control means for receiving the initially determined request acceleration and applying a predetermined torque to each wheel, a torque calculation means for calculating an allowable torque not causing a slip at each wheel when the allowable torque is applied thereto, on the basis of a vertical load applied to thereto and a friction coefficient of a road surface, a limit acceleration calculation means for calculating a limit acceleration acting on the vehicle in a case where the calculated allowable torque is applied to each wheel, and a request acceleration determination means for obtaining a request acceleration on the basis of the limit acceleration and the initially determined request acceleration, and for outputting the request acceleration, replacing the initially determined request acceleration, to the automatic drive contr
    Type: Application
    Filed: August 22, 2008
    Publication date: February 26, 2009
    Inventors: Shintaro OSAKI, Hiroyuki Kodama, Masayoshi Takeda, Kazunori Kadowaki, Yasuhiro Nakai, Hajime Kumabe, Shotaro Fukuda
  • Publication number: 20090048751
    Abstract: A control apparatus controls acceleration of a vehicle provided with a motive power generation apparatus and brake apparatuses. For the control, the control apparatus comprises calculation and actuating blocks. The calculation block calculates torque to be requested, based on a difference between an actual value of the acceleration and a target value thereof and a gain for feedback controlling the actual value of the acceleration to the target value thereof. The gain is differentiated in value between in a first case in which the brake apparatuses are used for the feedback control and a second case in which the brake apparatuses are not used for the feedback control. The actuating block actuates the motive power generation apparatus and the brake apparatuses based on the calculated torque. The value of the gain in the first case is made larger than the value of the gain in the second case.
    Type: Application
    Filed: August 7, 2008
    Publication date: February 19, 2009
    Applicants: DENSO CORPORATION, ADVICS CO., LTD.
    Inventors: Yasuhiro Nakai, Hajime Kumabe, Shotaro Fukuda, Satoshi Niwa, Hiroyuki Kodama, Kazunori Kadowaki, Shintaro Osaki
  • Publication number: 20090043473
    Abstract: An apparatus is provided to estimate a gradient of a road surface on which a vehicle travels. The apparatus comprises acquisition, estimation, and compensation members. The acquisition member acquires at least one of acceleration of the vehicle calculated on changes in a travel speed of the vehicle and acceleration sensed from a force applied to the vehicle. The estimation means estimates the gradient of the road surface based on the acquired acceleration. The compensation member compensates the acquired acceleration in terms of influence of noise superposed on the acceleration, depending on an operational condition of the vehicle. The compensated acceleration is used by the estimation. The compensation is carried out by cutting off the noise by a filter, for example.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 12, 2009
    Applicant: DENSO CORPORATION
    Inventors: Yasuhiro NAKAI, Hajime KUMABE, Shotaro FUKUDA, Satoshi NIWA, Masayoshi TAKEDA, Yukio MORI
  • Publication number: 20090043466
    Abstract: A control apparatus controlling anteroposterior acceleration of a vehicle by controlling a motive power generation apparatus mounted on the vehicle, which is also provided with a staged transmission apparatus that operates on gear ratios. The motive power generation apparatus has an output shaft producing a rotation force in response to a command to be requested. The rotation force is transmitted to the drive wheels via the staged transmission apparatus. A feedback manipulated variable is calculated to control the production of the rotation force of the motive power generation apparatus so that an actual value of anteroposterior acceleration of the vehicle is controlled at a target value thereof. The calculated feedback manipulated variable is used as the command. When the staged transmission apparatus is in the switchover control of the gear ratios, the manipulated variable is is limited from being calculated (for example, stopped from being calculated).
    Type: Application
    Filed: August 7, 2008
    Publication date: February 12, 2009
    Applicants: DENSO CORPORATION, ADVICS CO., LTD
    Inventors: Yasuhiro Nakai, Shotaro Fukuda, Satoshi Niwa, Hajime Kumabe, Shintaro Osaki, Kazunori Kadowaki
  • Publication number: 20090043474
    Abstract: A control apparatus is provided to control the stopping of a vehicle. The control apparatus comprises a speed detector that detects a speed of a vehicle, speed acquiring means, target setting means, and control means. The speed acquiring means acquires an actual speed of the vehicle from detected results of the speed detector. The target setting means sets a target acceleration of the vehicle depending on the actual speed when the vehicle is stopped automatically. The control means controls an actual acceleration of the vehicle at the target acceleration.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 12, 2009
    Applicant: DENSO CORPORATION
    Inventors: Yasuhiro NAKAI, Shotaro FUKUDA, Satoshi NIWA, Hajime KUMABE, Yukio MORI, Hiroyuki KODAMA, Takahisa YOKOYAMA
  • Publication number: 20080300766
    Abstract: In a cruise control system for a vehicle, a cruise ECU calculates a cornering resistance applied to the vehicle based upon a steering angle, when a vehicle turns. The cruise ECU calculates a speed reduction amount as a correction vehicle speed based upon the cornering resistance. The cruise ECU subtracts the correction vehicle speed from a set vehicle speed to set a target vehicle speed so that the vehicle speed becomes lower as the cornering resistance is larger. The cruise ECU controls the vehicle speed to be within a permissible speed range of the target vehicle speed.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Applicants: DENSO CORPORATION, Advics Co., Ltd.
    Inventors: Hajime Kumabe, Yasuhiro Nakai, Satoshi Niwa, Shotaro Fukuda, Masayoshi Takeda, Hiroyuki Kodama