Patents by Inventor William Eli Hollowell

William Eli Hollowell 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).

  • Fuel injection timer and current regulator
    Patent number: 7299789
    Abstract: A fuel injector control system and method provides precise fuel injection timing while eliminating the need for a voltage regulator by estimating or predicting ramp times between voltage application and actual fuel injection. In one embodiment, an estimated ramp time injection is calculated from a measured voltage and is used to delay or advance application of the voltage on the coil so that the load current reaches a desired current level at a desired injection start time. In another embodiment, an actual ramp time for a given injection is measured and used to predict future ramp times. A current regulator prevents excessive emissions from being generated when controlling the load current.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: November 27, 2007
    Assignee: Siemens VDO Automotive Corporation
    Inventors: Lou Vierling, Shawn Lance Tracy, William Eli Hollowell
  • Fuel injection timer and current regulator
    Patent number: 6923161
    Abstract: A fuel injector control system and method provides precise fuel injection timing while eliminating the need for a voltage regulator by estimating or predicting ramp times between voltage application and actual fuel injection. In one embodiment, an estimated ramp time injection is calculated from a measured voltage and is used to delay or advance application of the voltage on the coil so that the load current reaches a desired current level at a desired injection start time. In another embodiment, an actual ramp time for a given injection is measured and used to predict future ramp times. A current regulator prevents excessive emissions from being generated when controlling the load current.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: August 2, 2005
    Assignee: Siemens VDO Automotive Corporation
    Inventors: Lou Vierling, Shawn Lance Tracy, William Eli Hollowell
  • Fuel injection timer and current regulator
    Publication number: 20030183204
    Abstract: A fuel injector control system and method provides precise fuel injection timing while eliminating the need for a voltage regulator by estimating or predicting ramp times between voltage application and actual fuel injection. In one embodiment, an estimated ramp time injection is calculated from a measured voltage and is used to delay or advance application of the voltage on the coil so that the load current reaches a desired current level at a desired injection start time. In another embodiment, an actual ramp time for a given injection is measured and used to predict future ramp times. A current regulator prevents excessive emissions from being generated when controlling the load current.
    Type: Application
    Filed: March 7, 2003
    Publication date: October 2, 2003
    Applicant: Siemens VDO Automotive Corporation
    Inventors: Lou Vierling, Shawn Lance Tracy, William Eli Hollowell