Control In Response To A Time Standard Patents (Class 290/40D)
  • Patent number: 6166449
    Abstract: A mean vehicle speed Va and a mean variation .DELTA.Va are factors reflecting a current driving condition and an expected driving condition of a vehicle, which relate to a charge-discharge amount of a battery. A target state SOC* of the battery is calculated from the mean vehicle speed Va and the mean variation .DELTA.Va. The charge-discharge amount of the battery increases with an increase in mean vehicle speed Va and mean variation .DELTA.Va. The lower charging state of the battery results in the higher charge-discharge efficiency. The structure of the present invention sets the target state SOC* of the battery and controls the actual state of the battery to the target state SOC*, thereby enhancing the charge-discharge efficiency of the battery and ensuring a sufficient supply of electric power required for driving the vehicle.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: December 26, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshifumi Takaoka, Yukio Kinugasa, Kouji Yoshizaki, Yoshiaki Taga, deceased, by Shigeo Taga, heir, by Takiko Taga, heiress
  • Patent number: 6093975
    Abstract: A turbogenerator/motor controller with a microprocessor-based control system having a synchronous condenser, line commutated inverter, and a battery coupled to the turbogenerator/motor controller. When a load transient occurs, the gas turbine engine and the synchronous condenser, which draws its power from the line commutated inverter and battery, provide the power required to successfully meet the transient until the gas turbine engine controls respond by commanding the gas turbine engine to a higher speed, producing more power out of the turbogenerator. In the event of a sudden reduction in load, an auxiliary load device temporarily draws load until the gas turbine engine controls can respond and reduce the output power of the turbogenerator.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: July 25, 2000
    Assignee: Capstone Turbine Corporation
    Inventor: Brian W. Peticolas
  • Patent number: 6057605
    Abstract: A vehicle powertrain comprises an internal combustion engine 10 and an electric motor 14 capable of producing driving or braking torque for the vehicle. The exhaust system for the engine 10 includes a catalytic converter 22. A control unit 18 monitors the temperature of the catalytic converter 22 using a sensor 32 and controls the driving or braking torque produced by the electric motor 14 so that the load on the engine produces exhaust gases of a suitable temperature to keep the catalytic converter within its optimum operating temperature range while maintaining the desired total output of torque from the powertrain.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: May 2, 2000
    Assignee: Rover Group Limited
    Inventors: Carl Charles Bourne, John Lewis Outram
  • Patent number: 6037672
    Abstract: In an electrical power generation unit with a prime mover having an output shaft rotating at a speed .omega. which determines an output power function having at each value of .omega. an output-power/.omega. slope M.sub.d, and a generator developing electrical power responsive to shaft rotation, a generator electrical impedance is selected to provide a generator output-power/.omega. slope M.sub.g to approximate the M.sub.d slope, so that .omega. can be controlled to maximize efficiency.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: March 14, 2000
    Assignee: LockHeed Martin Corporation
    Inventor: Timothy Michael Grewe
  • Patent number: 5998880
    Abstract: A system and method for controlling operation of a diesel electric traction vehicle of the type including a synchronous generator driven by a diesel engine for producing alternating current (AC) electric power, the AC electric power being converted to direct current (DC) electric power and transferred over a DC link to a plurality of DC to AC inverters, and each of the inverters being coupled to transfer controlled frequency power to at least one AC electric traction motor coupled in driving relationship to at least one wheel-axle set of the vehicle. A computer-based control system controls operation of the engine, generator and inverters in response to a power command signal. The control system computes power supplied by the generator from calculated torque developed by the AC traction motors and electric power losses in the inverters and other circuit elements coupling power from the generator to the motors.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: December 7, 1999
    Assignee: General Electric Company
    Inventor: Ajith Kuttannair Kumar
  • Patent number: 5852330
    Abstract: In order to prevent an acceleration slip in an early stage of acceleration even in starting, an acceleration slip control system has a predicting section for predicting an acceleration slip of a drive wheel of a vehicle, a prediction control section for determining an initial value of a driving force reduction quantity and decreases the driving force by increasing the driving force reduction quantity to the initial value to prevent an occurrence of an acceleration slip when the acceleration slip is predicted, and a modifying section for modifying the initially set driving force reduction quantity in accordance with a sensed actual slipping condition during a prediction control of the prediction control section.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: December 22, 1998
    Assignee: Unisia Jecs Corporation
    Inventor: Daijiro Yumoto
  • Patent number: 5642020
    Abstract: An electric vehicle control device for a plurality of vehicles connected in series to form a formation including a plurality of control devices, each being provided for one of the vehicles, respectively. Each of the control devices includes a PWM converter device for receiving a first A.C. power through a current collector and a transformer from an A.C. overhead line and for converting the first A.C. power into a D.C. power using a PWM carrier wave, an inverter connected to D.C. output terminals of the PWM converter device for converting the D.C. power into a second A.C. power, and an electric motor connected to A.C. output terminals of the inverter for being driven by the second A.C. power. Phase angles of the PWM carrier waves in the PWM converter devices are determined to be mutually shifted by a predetermined angle, thereby higher harmonics of the PWM carrier waves leaking into the A.C. overhead line are reduced.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: June 24, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Akira Miyazaki
  • Patent number: 4633093
    Abstract: An idling speed feedback control method for use with an internal combustion engine having electrical load equipment and a generator for supplying electric power to the electrical load equipment, the generator being driving by the engine. The idling speed feedback control amount is effected as a function of the difference between an actual engine speed and a target idling speed. The method comprises the steps of detecting a generating state signal as a function of the field coil current of the generator which represents the generating state of the generator; detecting the actual engine speed; determining an electrical load correction value during a time period starting at or before the time when the electrical load correction value changes and ending at the time at or after the electrical load correction value changes.
    Type: Grant
    Filed: January 17, 1985
    Date of Patent: December 30, 1986
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yutaka Otobe, Takahiro Iwata
  • Patent number: 4464577
    Abstract: A control system for a prime mover may include a proportional speed control, a primary overspeed control and an emergency overspeed control. The proportional speed signal is obtained from select highest value logic, whereas overspeed and loss of speed signals are submitted to two out of three logic and two out of four logic, respectively. A passive emergency overspeed channel is provided in combination with the primary overspeed channel to respective de-energize and energize trip relays connected to electrohydraulic trip devices.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: August 7, 1984
    Assignee: General Electric Company
    Inventors: James B. Wagner, Harvey H. Chamberlain