Patents by Inventor Chun Tal

Chun Tal 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 for monitoring components in an exhaust after treatment system, an exhaust after treatment system, and a controller for an exhaust after treatment system
    Patent number: 9115631
    Abstract: Components in an exhaust after treatment system (EATS) for a diesel engine are monitored by measuring heat released (QDOC) across a diesel oxidation catalyst (DOC) and heat released (QEATS) across the DOC and a diesel particulate filter (DPF) during an A Hi injection event, by calculating heat input from AHI fuel (QAHI) during performance of the AH I injection event with a fully functioning AHI nozzle, and by measuring NOX conversion efficiency (nSCR) from NOX to N2 by a selective catalytic reduction system (SCR) at a condition where a SCR is sensitive to feeding gas compositions while AHI is not in use. Malfunctioning components are identified using these measurements and calculations.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: August 25, 2015
    Assignee: Mack Trucks, Inc.
    Inventors: Qunlong Dong, Chun Tal
  • METHOD FOR MONITORING COMPONENTS IN AN EXHAUST AFTER TREATMENT SYSTEM, AN EXHAUST AFTER TREATMENT SYSTEM, AND A CONTROLLER FOR AN EXHAUST AFTER TREATMENT SYSTEM
    Publication number: 20150096283
    Abstract: Components in an exhaust after treatment system (EATS) for a diesel engine are monitored by measuring heat released (QDOC) across a diesel oxidation catalyst (DOC) and heat released (QEATS) across the DOC and a diesel particulate filter (DPF) during an A Hi injection event, by calculating heat input from AHI fuel (QAHI) during performance of the AH I injection event with a fully functioning AHI nozzle, and by measuring NOX conversion efficiency (nSCR) from NOX to N2 by a selective catalytic reduction system (SCR) at a condition where a SCR is sensitive to feeding gas compositions while AHI is not in use. Malfunctioning components are identified using these measurements and calculations.
    Type: Application
    Filed: June 13, 2012
    Publication date: April 9, 2015
    Applicant: Mack Trucks, Inc.
    Inventors: Qunlong Dong, Chun Tal