Patents by Inventor Arun Sasikumar Sujatha

Arun Sasikumar Sujatha 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).

  • Method and apparatus for generating an ion current between electrodes of a spark plug
    Patent number: 9429133
    Abstract: The invention relates to a method for generating an ion current which occurs as a direct current between a central electrode and one or more side electrodes of a spark plug of a spark ignition engine which is supplied repeatedly with an ignition voltage from an ignition voltage source, wherein the spark ignition engine is assigned an engine control unit, which, in an engine cycle, determines for each spark plug a target ignition point and/or an activation point for the ignition voltage source before the target ignition point, and a second voltage source is provided, which delivers a second voltage for the generation of the ion current, wherein the second voltage source lying in the engine cycle for a first time interval ?t1, which is shorter than the duration of the engine cycle, is connected to the electrodes of the spark plug, and wherein the ion current flowing as a result of the application of the second voltage to the electrodes of the spark plug takes a path which avoids the ignition voltage source.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: August 30, 2016
    Assignee: BorgWarner Ludwigsburg GmbH
    Inventors: Arun Sasikumar Sujatha, Ganghua Ruan, Stefan Heinzelmann, Dirk Wüstenhagen, Ulrich Schönauer
  • METHOD AND APPARATUS FOR GENERATING AN ION CURRENT BETWEEN ELECTRODES OF A SPARK PLUG
    Publication number: 20140116382
    Abstract: The invention relates to a method for generating an ion current which occurs as a direct current between a central electrode and one or more side electrodes of a spark plug of a spark ignition engine which is supplied repeatedly with an ignition voltage from an ignition voltage source, wherein the spark ignition engine is assigned an engine control unit, which, in an engine cycle, determines for each spark plug a target ignition point and/or an activation point for the ignition voltage source before the target ignition point, and a second voltage source is provided, which delivers a second voltage for the generation of the ion current, wherein the second voltage source lying in the engine cycle for a first time interval ?t1, which is shorter than the duration of the engine cycle, is connected to the electrodes of the spark plug, and wherein the ion current flowing as a result of the application of the second voltage to the electrodes of the spark plug takes a path which avoids the ignition voltage source.
    Type: Application
    Filed: October 25, 2013
    Publication date: May 1, 2014
    Inventors: Arun Sasikumar Sujatha, Ganghua Ruan, Stefan Heinzelmann, Dirk Wüstenhagen, Ulrich Schönauer