Patents by Inventor Nicholas Michael Zayan

Nicholas Michael Zayan 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).

  • Rankine cycle pump and recuperator design for multiple boiler systems
    Patent number: 10161270
    Abstract: A waste heat recovery system for an engine is disclosed. In one example, the waste heat recovery system includes an expander, a first heat exchanger system, and a second heat exchanger system. The expander is configured to convert waste heat from a working fluid into mechanical energy. The first heat exchanger system is in fluid communication with the expander, the first heat exchanger system disposed upstream of the expander. The second heat exchanger system is in fluid communication with the expander and is disposed upstream of the expander and arranged in parallel with the first heat exchanger system.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: December 25, 2018
    Assignee: AVL POWERTRAIN ENGINEERING, INC.
    Inventors: Gary L. Hunter, Gustav R. Johnson, Nicholas Michael Zayan
  • Rankine Cycle Pump And Recuperator Design For Multiple Boiler Systems
    Publication number: 20170067371
    Abstract: A waste heat recovery system for an engine is disclosed. In one example, the waste heat recovery system includes an expander, a first heat exchanger system, and a second heat exchanger system. The expander is configured to convert waste heat from a working fluid into mechanical energy. The first heat exchanger system is in fluid communication with the expander, the first heat exchanger system disposed upstream of the expander. The second heat exchanger system is in fluid communication with the expander and is disposed upstream of the expander and arranged in parallel with the first heat exchanger system.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 9, 2017
    Inventors: Gary L. HUNTER, Gustav R. JOHNSON, Nicholas Michael ZAYAN
  • SCR ammonia slip detection
    Patent number: 8607548
    Abstract: In one implementation of the disclosed technique, a NOx sensor polynomial algorithm is used to discriminate between NOx and ammonia emission. The polynomial algorithm uses the SCR's time constant property to infer the “loading state” of the SCR and estimate both the NOx conversion and quantity of ammonia slip. The polynomial algorithm assesses this by differentially analyzing the upstream and downstream NOx sensor signals through a comparison of the polynomial coefficients.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: December 17, 2013
    Assignee: AVL North America, Inc.
    Inventor: Nicholas Michael Zayan
  • SCR AMMONIA SLIP DETECTION
    Publication number: 20120085083
    Abstract: In one implementation of the disclosed technique, a NOx sensor polynomial algorithm is used to discriminate between NOx and ammonia emission. The polynomial algorithm uses the SCR's time constant property to infer the “loading state” of the SCR and estimate both the NOx conversion and quantity of ammonia slip. The polynomial algorithm assesses this by differentially analyzing the upstream and downstream NOx sensor signals through a comparison of the polynomial coefficients.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 12, 2012
    Inventor: Nicholas Michael Zayan