Patents by Inventor Jun-hee Won

Jun-hee Won 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).

  • Engine control method for maintaining performance of oxidation catalyst
    Patent number: 9599002
    Abstract: In an engine control method for maintaining performance of oxidation catalyst, fuel of a compressed natural gas engine under a lean-burn condition with an air-fuel equivalence ratio less than or equal to 1 is burned. Activation of the oxidation catalyst for purifying an exhaust gas of the engine is determined. Necessity of a regeneration mode for recovering catalytic activation of the oxidation catalyst according to an activation state of the oxidation catalyst and an operating condition of the engine is determined. And, the air-fuel equivalence ratio is increased to a range of from 1.10 to 1.20 when the oxidation catalyst is inactive and an engine speed is lower than a predetermined speed.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: March 21, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: In-hyuk Im, Nam-il Choi, Jun-hee Won, Tae-hyung Kim
  • ENGINE CONTROL METHOD FOR MAINTAINING PERFORMANCE OF OXIDATION CATALYST
    Publication number: 20160097313
    Abstract: In an engine control method for maintaining performance of oxidation catalyst, fuel of a compressed natural gas engine under a lean-burn condition with an air-fuel equivalence ratio less than or equal to 1 is burned. Activation of the oxidation catalyst for purifying an exhaust gas of the engine is determined. Necessity of a regeneration mode for recovering catalytic activation of the oxidation catalyst according to an activation state of the oxidation catalyst and an operating condition of the engine is determined. And, the air-fuel equivalence ratio is increased to a range of from 1.10 to 1.20 when the oxidation catalyst is inactive and an engine speed is lower than a predetermined speed.
    Type: Application
    Filed: September 30, 2015
    Publication date: April 7, 2016
    Inventors: In-hyuk Im, Nam-il Choi, Jun-hee Won, Tae-hyung Kim