Patents by Inventor Lawrence D. Hazelton

Lawrence D. Hazelton 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: 20180129215
    Abstract: Systems and methods for operating an automated vehicle such as an autonomous vehicle may include an autonomous guidance system, a method of automatically controlling and autonomous vehicle based on electronic messages from roadside infrastructure or other-vehicles, a method of automatically controlling an autonomous vehicle based on cellular telephone location information, pulsed LED vehicle-to-vehicle (V2V) communication system, a method and apparatus for controlling an autonomous vehicle, an autonomous vehicle with unobtrusive sensors, and adaptive cruise control integrated with a lane keeping assist system. The systems and methods may use information from radar, lidar, a camera or vision/image devices, ultrasonic sensors, and digital map data to determine a route or roadway position and provide for steering, braking, and acceleration control of a host vehicle.
    Type: Application
    Filed: October 25, 2017
    Publication date: May 10, 2018
    Inventors: Lawrence D. Hazelton, Craig A. Baldwin, Robert J. Myers, James M. Chan, Patrick M. Griffin
  • Patent number: 8350511
    Abstract: An actuator includes a motor operated by a controller through a pulse width modulation drive signal applied to a drive circuit that drives the motor. The actuator has an output shaft connected to a coupling structure for manipulating a device such as a variable geometry turbine (VGT) or an exhaust gas recirculation (EGR) valve. The device has a range of motion limited by first and second mechanical stops located at opposing low and high ends of the range. The controller learns the location of the mechanical stops during calibration. An external control unit transmits a desired position to the actuator. A protocol allows the external control unit to implicitly request a positioning mode by virtue of what value range the desired position falls into. The controller is configured to limit the drive signal to a non-harmful level when one of the positioning modes calls for pushing the device against one of the stops.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: January 8, 2013
    Assignee: Delphi Technologies, Inc.
    Inventors: Stephen P. Sanders, Joyce D. Carsey, Lawrence D. Hazelton, Jos Lang, Frederic Jacquot, Thomas W. Newman
  • Publication number: 20110025250
    Abstract: An actuator includes a motor operated by a controller through a pulse width modulation drive signal applied to a drive circuit that drives the motor. The actuator has an output shaft connected to a coupling structure for manipulating a device such as a variable geometry turbine (VGT) or an exhaust gas recirculation (EGR) valve. The device has a range of motion limited by first and second mechanical stops located at opposing low and high ends of the range. The controller learns the location of the mechanical stops during calibration. An external control unit transmits a desired position to the actuator. A protocol allows the external control unit to implicitly request a positioning mode by virtue of what value range the desired position falls into. The controller is configured to limit the drive signal to a non-harmful level when one of the positioning modes calls for pushing the device against one of the stops.
    Type: Application
    Filed: October 13, 2010
    Publication date: February 3, 2011
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: STEPHEN P. SANDERS, JOYCE D. CARSEY, LAWRENCE D. HAZELTON, JOS LANG, FREDERIC JACQUOT, THOMAS W. NEWMAN
  • Patent number: 7855525
    Abstract: An actuator includes a motor operated by a controller through a pulse width modulation drive signal applied to a drive circuit that drives the motor. The actuator has an output shaft connected to a coupling structure for manipulating a device such as a variable geometry turbine (VGT) or an exhaust gas recirculation (EGR) valve. The device has a range of motion limited by first and second mechanical stops located at opposing low and high ends of the range. The controller learns the location of the mechanical stops during calibration. An external control unit transmits a desired position to the actuator. A protocol allows the external control unit to implicitly request a positioning mode by virtue of what value range the desired position falls into. The controller is configured to limit the drive signal to a non-harmful level when one of the positioning modes calls for pushing the device against one of the stops.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: December 21, 2010
    Assignee: Delphi Technologies, Inc.
    Inventors: Stephen P. Sanders, Joyce D. Carsey, Lawrence D. Hazelton, Jos Lang, Frederic Jacquot, Thomas W. Newman
  • Publication number: 20090108793
    Abstract: An actuator includes a motor operated by a controller through a pulse width modulation drive signal applied to a drive circuit that drives the motor. The actuator has an output shaft connected to a coupling structure for manipulating a device such as a variable geometry turbine (VGT) or an exhaust gas recirculation (EGR) valve. The device has a range of motion limited by first and second mechanical stops located at opposing low and high ends of the range. The controller learns the location of the mechanical stops during calibration. An external control unit transmits a desired position to the actuator. A protocol allows the external control unit to implicitly request a positioning mode by virtue of what value range the desired position falls into. The controller is configured to limit the drive signal to a non-harmful level when one of the positioning modes calls for pushing the device against one of the stops.
    Type: Application
    Filed: October 30, 2007
    Publication date: April 30, 2009
    Inventors: Stephen P. Sanders, Joyce D. Carsey, Lawrence D. Hazelton, Jos Lang, Frederic Jacquot, Thomas W. Newman
  • Patent number: 6975493
    Abstract: A low side overvoltage protection circuit configuration comprising: a first switching device in operable communication with and disposed between a ground and a protected ground; a load in operable communication with and disposed between a voltage source and the protected ground; a control circuit configured to control the first switching device in operable communication with a transient protected voltage source. The first switching device is configured to provide electrical circuit isolation of the protected ground from the ground. Also, a method for providing a low side circuit overvoltage protection comprising: detecting an overvoltage transient on a voltage source; isolating a protected ground from a circuit ground with a first switching device; and controlling the first switching device with a control circuit in operable communication with transient protected voltage source. The control circuit is responsive to an overvoltage transient of the voltage source.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: December 13, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Lance R. Strayer, Lawrence D. Hazelton
  • Patent number: 6922322
    Abstract: A high side reverse voltage and overvoltage protection circuit configuration comprising: a first switching device in operable communication with a transient protected voltage source; a second switching device in operable communication and in series with the first switching device and in operable communication with an unprotected voltage source; a control circuit configured to control the first switching device and the second switching device in operable communication with another transient protected voltage source. The first switching device is configured to provide reverse voltage protection for the transient protected voltage source; and the second switching device is configured to provide overvoltage protection for the transient protected voltage source.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: July 26, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Lance R. Strayer, Lawrence D. Hazelton
  • Publication number: 20040150929
    Abstract: A low side overvoltage protection circuit configuration comprising: a first switching device in operable communication with and disposed between a ground and a protected ground; a load in operable communication with and disposed between a voltage source and the protected ground; a control circuit configured to control the first switching device in operable communication with a transient protected voltage source. The first switching device is configured to provide electrical circuit isolation of the protected ground from the ground. Also, a method for providing a low side circuit overvoltage protection comprising: detecting an overvoltage transient on a voltage source; isolating a protected ground from a circuit ground with a first switching device; and controlling the first switching device with a control circuit in operable communication with transient protected voltage source. The control circuit is responsive to an overvoltage transient of the voltage source.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Lance R. Strayer, Lawrence D. Hazelton
  • Publication number: 20040150927
    Abstract: A high side reverse voltage and overvoltage protection circuit configuration comprising: a first switching device in operable communication with a transient protected voltage source; a second switching device in operable communication and in series with the first switching device and in operable communication with an unprotected voltage source; a control circuit configured to control the first switching device and the second switching device in operable communication with another transient protected voltage source. The first switching device is configured to provide reverse voltage protection for the transient protected voltage source; and the second switching device is configured to provide overvoltage protection for the transient protected voltage source.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Lance R. Strayer, Lawrence D. Hazelton
  • Patent number: 6486745
    Abstract: An adjustable voltage controlled oscillator has an input for receiving a voltage signal and an integrator coupled to the input for generating a ramp signal. The circuit also includes an adjustable current supply coupled to an output of the integrator for supplying an adjustable amount of current. A comparator compares the ramp signal with a predetermined voltage. The circuit further includes an output for generating a frequency output as a function of the comparison, wherein the circuit is calibratible by adjusting current generated by the adjustable current supply.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: November 26, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Gregory J. Manlove, Lawrence D. Hazelton, Mark B. Kearney