Aerospace and Mechanical Engineering

Search CurateND

Filter by:

Search criteria:

Department or Unit: Aerospace and Mechanical Engineering remove × Creator: Hsueh-Chia Chang remove × Creator: David T. Leighton remove × Language: eng remove × Publisher: United States Patent and Trademark Office remove ×
Clear all

List of files deposited in CurateND that match your search criteria

  • 1

    Patent

    Method and Apparatus for treating exhaust gases
    Thumbnail
    Inventor(s):
    Hsueh-Chia Chang, David T. Leighton
    Patent Number:
    US 6428754 B2
    Description:

    An exhaust gas treatment system and method for treating the exhaust gas of an internal combustion engine includes a catalytic converter and a catalytic preheater or igniter upstream of the catalytic converter. A bypass passage extends around the igniter such that during the ignition period about two-thirds of the exhaust gas is bypassed around the igniter and one-third passes through the igniter. The igniter raises the temperature of the exhaust gases passing therethrough to an adiabatic temp…

    Date Issued:
    2002-08-06
    Title
    Method and Apparatus for treating exhaust gases
    Description
    An exhaust gas treatment system and method for treating the exhaust gas of an internal combustion engine includes a catalytic converter and a catalytic preheater or igniter upstream of the catalytic converter. A bypass passage extends around the igniter such that during the ignition period about two-thirds of the exhaust gas is bypassed around the igniter and one-third passes through the igniter. The igniter raises the temperature of the exhaust gases passing therethrough to an adiabatic temperature of about 900.degree. K. Accordingly, the flow through the igniter combined with the flow through the bypass passage raises the average temperature of the combined exhaust gases to approximately 700.degree. K., which is sufficient to ignite the catalytic converter at substantially the leading edge thereof. Accordingly, normal convective flow of the exhaust gases through the catalytic converter assists in propagating ignition of the converter. A temperature sensor in the catalytic converter causes a controller to operate a valve to divert substantially all of the exhaust gas flow through the bypass passage after the catalytic converter has ignited.
    Creator
    Hsueh-Chia Chang, David T. Leighton
    Publisher
    United States Patent and Trademark Office
    Language
    eng
    Rights
    http://creativecommons.org/publicdomain/zero/1.0/
    Resource Type
    Patent
1 to 1 of 1