Patents Assigned to Los Angeles County Sanitation Districts
  • Emission control system
    Patent number: 4901698
    Abstract: A method is provided for the control of nitrogen oxide and carbon monoxide emissions from a digester gas engine by the injection of air immediately upstream of the intake valve to form a gradient charge in the combustion chamber having an incombustible portion adjacent the piston and a more concentrated combustible portion adjacent the spark plug, and by the calibration of the spark advance curve of the engine.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: February 20, 1990
    Assignee: Los Angeles County Sanitation District
    Inventor: Vladimir A. Novy
  • Emission control system
    Patent number: 4825843
    Abstract: A method is provided for the control of nitrogen oxide and carbon monoxide emissions from a digester gas engine by the injection of air immediately upstream of the intake valve to form a gradient charge in the combustion chamber having an incombustible portion adjacent the piston and a more concentrated combustible portion adjacent the spark plug, and by the calibration of the spark advance curve of the engine.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: May 2, 1989
    Assignee: Los Angeles County Sanitation Districts
    Inventor: Vladimir A. Novy