Patents by Inventor Shigeru Horikoshi

Shigeru Horikoshi 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: 5398555
    Abstract: A torque detection mechanism can be provided for a power train and its control unit without newly adding a sensor and its signal processing module. As a gear pair for the torque detection mechanism of a phase difference type, existing gears in a transmission are used, or a gear pair for this mechanism are provided adjacent to these existing gears. From phase signals sent from pickups, a phase difference signal is obtained by use of one part of existing devices in the control unit. The torque detection mechanism can be realized with the minimum number of component parts by utilizing the existing members and spaces instead of newly adding a sensor and its module. The invention can be applied to either of FF and FR cars, and has a practical structure in respect of the performance, costs and reliability.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: March 21, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Sadayasu Ueno, Yutaka Nishimura, Yasunori Mouri, Nobuo Kurihara, Hiroshi Kuroiwa, Mitsuhiro Masuda, Shigeru Horikoshi, Matsuo Amano, Kazuto Kinoshita, Junichi Ishii, Kiyoshi Horibe, Kiyoshi Miura
  • Patent number: 5369580
    Abstract: A novel yawing-momentum detecting apparatus, and yawing-detecting method for a vehicle, and also a motion controlling apparatus for the vehicle with employment of this yawing-momentum detecting apparatus. The yawing-momentum detecting apparatus for the vehicle comprises: a plurality of acceleration sensors disposed at symmetrical positions on said vehicle with respect to a vertical axis passing through a gravity center of the vehicle within a plane perpendicular the vertical axis; units for calculating yawing momentum of the vehicle occurring around the vertical axis based upon outputs from the plural acceleration sensors; and characteristic correcting units for correcting output characteristics of the plural acceleration sensors under known acceleration values to coincide with reference output characteristic values when the known acceleration values are obtained under a certain vehicle operating condition.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: November 29, 1994
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Tatsuhiko Monji, Shigeru Horikoshi, Kousaku Shimada, Hayato Sugawara
  • Patent number: 5247466
    Abstract: An apparatus for detecting an angular rate of a moving body has first and second sensors each of which has a detection direction, the first and second acceleration sensors are mounted at fixed locations on a moving body so that the first and second acceleration sensors have substantially the same detection direction on a plane and a fixed distance therebetween in the detection direction, and the angular rate (.omega.) of the moving body is detected according to the following equation: ##EQU1## wherein .DELTA.G is an acceleration difference and R is the distance between the first and second acceleration sensors in the detection direction.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: September 21, 1993
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Kousaku Shimada, Yozo Nakamura, Shigeru Horikoshi, Hayato Sugawara, Tatsuhiko Monji
  • Patent number: 5219212
    Abstract: An anti-skid control system of a vehicle comprising a yaw motion sensing device of the vehicle, a device for calculating target slip rates of the wheels according to the yaw motion, a wheel speed detecting device for detecting actual speeds of the wheels, a control device for generating a control signals based on the target slip rates and the actual speeds of the wheels, a control valve for controlling braking oil pressure according to the control signals, a first failure detecting device for detecting an abnormality relating to the yaw motion sensing device, a second failure detecting device for detecting an abnormality relating to the control valve, and a failsafe control device for keeping the target slip rates from the calculating device constant and when the abnormality relating to the yaw motion sensing device is detected and for bringing the control valve into a non-operating state when the abnormality relating to the control valve is detected.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: June 15, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Kousaku Shimada, Shigeru Horikoshi, Tatsuhiko Monji
  • Patent number: 5207483
    Abstract: The invention relates to an anti-skid control system for an automotive vehicle, which includes devices provided independently for respective wheels of the vehicle and for controlling the brake fluid pressure of respective wheels, device for detecting a vehicle speed and a rotation speed of the wheel and deriving slip ratio on the wheel on the basis of the detected values, device for detecting actual yawing angular acceleration on the vehicle, device for setting a target value of the slip ratio on the wheel based on the yawing angular acceleration for each wheel independently of the other, and control signal unit for providing the control signal to the brake fluid pressure controlling unit so as to adjust the derived slip ratio toward the target value.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: May 4, 1993
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Kousaku Shimada, Shigeru Horikoshi, Tatsuhiko Monji, Hayato Sugawara
  • Patent number: 4982710
    Abstract: An electronic throttle valve opening control system provides an actuating D.C. motor for opening or closing the throttle valve and a control circuit for controlling the D.C. motor current in response to the difference between the detected real throttle valve opening and a target value of the throttle valve opening. In addition to the above difference signal, the D.C. motor is controlled by a first correction quantity signal in accordance with variation of the detected throttle valve opening and a second correction quantity signal in accordance with the friction force existing in a valve opening control mechanism.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: January 8, 1991
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co.
    Inventors: Kenji Ohta, Shigeru Horikoshi, Hayato Sugawara
  • Patent number: 4911125
    Abstract: Disclosed is a method and apparatus for controlling a throttle valve driven by a D.C. motor in an internal combustion engine, in which the D.C. motor is driven until a valve position sensor detecting the angular position of the throttle valve generates an output signal which coincides with the output signal of an accelerator pedal sensor detecting the amount of depression of an accelerator pedal of a vehicle. The value of motor current required for causing very slight displacement of a return spring provided for returning the throttle valve toward a predetermined angular position is utilized for automatically compensating various factors of fluctuation attributable to friction, inertia, etc. of means driving the throttle valve. A small-capacity microprocessor is used to control the D.C. motor so that the throttle valve can operate with high accuracy and high-speed response capability without being adversely affected by changes in the operating condition as well as secular variations.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: March 27, 1990
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Hayato Sugawara, Shigeru Horikoshi, Kenji Ohta
  • Patent number: 4874053
    Abstract: A device for detecting a load torque using angle detectors fitted with a certain spacing on a shaft which is rotated by a drive source and on the basis of a relative angular difference of angles detected by the angle detectors. The device includes two rotary drums or discs fitted with a certain spacing on the drive side and load side of the shaft, with a plurality of magnetic poles for generating magnetic signals being formed on the surface thereof, and a magnetic sensor disposed to confront the surface of the rotary drums or discs, with magnetic resistance effect elements which vary in internal resistance in response to the magnetism of the magnetic poles being provided thereon. The amount of torsion created by the load on the load side of the rotary shaft is measured as a phase difference of outputs of the magnetic sensor, and the torque is detected in terms of the angular difference between the magnetic drums or discs.
    Type: Grant
    Filed: June 22, 1988
    Date of Patent: October 17, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Kimura, Shotaro Naito, Kunio Miyashita, Yasuo Noto, Noboru Sugiura, Tadashi Takahashi, Hirohisa Yamamura, Seizi Yamashita, Syooichi Kawamata, Fumio Tajima, Shigeru Horikoshi
  • Patent number: 4484653
    Abstract: An automatic driving wheel change-over apparatus designed to automatically effect a change-over between two wheel drive mode and the four wheel drive mode of a vehicle in accordance with the surface conditions of a road. When the difference in speed between the front and rear wheel exceeds a predetermined value during the two wheel drive, a clutch is operated for a predetermined time TM.sub.0, and when the clutch is operated more than four times during a predetermined time TI.sub.0 which is longer than the time TM.sub.0, the clutch is operated continuously for a predetermined time TH.sub.0 which is longer than the time TM.sub.0 thereby holding the vehicle in the four wheel drive mode.
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: November 27, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Shigeru Horikoshi, Tatsunori Sakaguchi
  • Patent number: 4059087
    Abstract: An oil pressure detecting apparatus for an internal combustion engine comprises an LC oscillator having an inductance variable in dependence upon variation in the oil pressure of the engine. The frequency or voltage of an output signal of the oscillator is compared with that of a reference signal having a predetermined relation to the number of revolutions of the engine, thereby to determine if the oil pressure is within an acceptable range.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: November 22, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Takahiko Tanigami, Akira Hasegawa, Shigeru Horikoshi