Patents by Inventor Jaeyeong Chang

Jaeyeong Chang 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).

  • Crank velocity driveline filtering for consecutive misfire detection
    Patent number: 10899355
    Abstract: A misfire detection system and method for a vehicle utilize a controller to obtain a crankshaft speed signal indicative of a rotational speed of an engine crankshaft connected to a device that mitigates vibrational disturbances at the crankshaft caused by misfires of the engine, detect that a first firing event of the engine is a first misfire based on the crankshaft speed signal, monitor a vibrational response of the crankshaft, detect that a consecutive second firing event of the engine is a second misfire based on a first modified crankshaft speed signal and the first set of thresholds, and in response to detecting the second misfire, reset the monitoring of the vibrational response of the crankshaft including modifying the amplitude of the crankshaft speed signal to obtain a second modified crankshaft speed signal and comparing the second modified crankshaft speed signal to a set of thresholds.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: January 26, 2021
    Assignee: FCA US LLC
    Inventors: Jaeyeong Chang, Richard K Moote, Arthur J Varady, Ilias Anagnostopoulos-Politis, Zhe Wang, Yan Zhang
  • CRANK VELOCITY DRIVELINE FILTERING FOR CONSECUTIVE MISFIRE DETECTION
    Publication number: 20200094842
    Abstract: A misfire detection system and method for a vehicle utilize a controller to obtain a crankshaft speed signal indicative of a rotational speed of an engine crankshaft connected to a device that mitigates vibrational disturbances at the crankshaft caused by misfires of the engine, detect that a first firing event of the engine is a first misfire based on the crankshaft speed signal, monitor a vibrational response of the crankshaft, detect that a consecutive second firing event of the engine is a second misfire based on a first modified crankshaft speed signal and the first set of thresholds, and in response to detecting the second misfire, reset the monitoring of the vibrational response of the crankshaft including modifying the amplitude of the crankshaft speed signal to obtain a second modified crankshaft speed signal and comparing the second modified crankshaft speed signal to a set of thresholds.
    Type: Application
    Filed: September 26, 2018
    Publication date: March 26, 2020
    Inventors: Jaeyeong Chang, Richard K. Moote, Arthur J. Varady, Ilias Anagnostopoulos-Politis, Zhe Wang, Yan Zhang