Patents by Inventor Naotsugu Masuda

Naotsugu Masuda 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: 5585798
    Abstract: An obstacle detection system for an automotive vehicle detects obstacles ahead of the vehicle and finds the dynamic relativity between the vehicle and each of the obstacles. Based on the dynamic relativity, information relating to a danger level between the vehicle and each obstacle is operated on so as to make a danger judgement. A frequency, at which the operations on the information relating to danger level are made, is increasingly or decreasingly varied according to the danger levels of the obstacles.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: December 17, 1996
    Assignee: Mazda Motor Corporation
    Inventors: Tohru Yoshioka, Hiroki Uemura, Tadayuki Niibe, Ayumu Doi, Kenichi Okuda, Yasunori Yamamoto, Tomohiko Adachi, Naotsugu Masuda
  • Patent number: 5530651
    Abstract: The vehicle is provided with a radar unit for detecting an obstacle existing ahead in the course of the running way along which the vehicle is running. When the radar unit detects a variation in its detectable region, such as a detectable distance or a detectable area range in left and right directions, from the detectable region to be detectable during ordinary running, a safety unit such as an alarm unit or an automatic brake unit is operated. A control logic for operating a collision-avoiding system for avoiding a collision with the obstacle existing ahead, such as an alarm unit or an automatic brake unit, is altered to a safe side on which safety in driving the vehicle is improved, when the detectable region is varied.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: June 25, 1996
    Assignee: Mazda Motor Corporation
    Inventors: Hiroki Uemura, Tetsuro Butsuen, Tohru Yoshioka, Ayumu Doi, Naotsugu Masuda, Kenichi Okuda, Tadayuki Niibe, Yasunori Yamamoto, Satoshi Morioka, Tomohiko Adachi
  • Patent number: 5483453
    Abstract: When the vehicle has deviated or is deviating from a lane on which the vehicle has been or is running, the deviation of the vehicle from the lane can be suppressed, for example, by allowing the steering wheel to be operatively rotated prior to an intention of the operator. The timing of suppressing the deviation of the vehicle can be altered in accordance with conditions including, for example, the existence of a lane in the direction of deviation of the vehicle on which another vehicle is running in the same direction, the existence of an obstacle in the direction of deviation of the vehicle, the existence of an adjacent lane in the direction of deviation of the vehicle on which another vehicle is running in the opposite direction, a state of the lane on which the vehicle is running, such as a curved lane or a straight lane, a direction of deviation is outside or inside the curved lane or a lane width, a vehicle speed, a steering angle of a steering wheel, an extent of vision, and so on.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: January 9, 1996
    Assignee: Mazda Motor Corporation
    Inventors: Hiroki Uemura, Tetsuro Butsuen, Tohru Yoshioka, Ayumu Doi, Kenichi Okuda, Yasunori Yamamoto, Tomohiko Adachi, Naotsugu Masuda
  • Patent number: 5467284
    Abstract: An obstacle detection apparatus for a motor vehicle detects another vehicle traveling in front of the vehicle as an obstacle. The apparatus has a first unit, providing a course on which the vehicle is supposed to travel, a second unit, providing a reserve course located outside of the course, an obstacle detector detecting the other vehicle traveling in the course or the reserve course as an obstacle, and an obstacle detection continuation unit continuously detecting the other vehicle until a predetermined condition has been satisfied when the other vehicle moves from the course to the reserve course.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: November 14, 1995
    Assignee: Mazda Motor Corporation
    Inventors: Tohru Yoshioka, Hiroki Uemura, Tadayuki Niibe, Ayumu Doi, Ken-ichi Okuda, Yasunori Yamamoto, Tomohiko Adachi, Naotsugu Masuda
  • Patent number: 5289895
    Abstract: A control system for a four-wheel drive vehicle includes a center differential provided between a front shaft and a rear shaft. The control system also includes a device for restricting a differential between the front shaft and the rear shaft by operating the center differential to be in a locking condition and a controller for controlling the differential restricting device so that a differential restricting force is increased based on an increase in an engine output. The differential restricting force is decreased based on an increase in a vehicle body speed.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: March 1, 1994
    Assignee: Mazda Motor Corporation
    Inventors: Minoru Takata, Hideshi Hiruta, Nobuyuki Nakamura, Masaru Shiraishi, Yoshitaka Kimura, Naotsugu Masuda
  • Patent number: 5275254
    Abstract: A control system for a four-wheel drive vehicle includes a first differential provided between a front shaft and a rear shaft and a second differential provided between a right wheel and a left wheel. The control system comprises a first device provided in the first differential for restricting a differential between the front shaft and the rear shaft, a second device provided in the second differential for restricting a differential between the right wheel and the left wheel, and a device for controlling the restricting operations carried out by the first device and the second device. The controlling device includes a device for controlling operational timings in the first device and the second device so that the timing when the first device maintains the first differential in locking condition is different from the timing when the second device maintains the second differential in locking condition.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: January 4, 1994
    Assignee: Mazda Motor Corporation
    Inventors: Masaru Shiraishi, Hideshi Hiruta, Nobuyuki Nakamura, Yoshitaka Kimura, Minoru Takata, Naotsugu Masuda