US 11,739,724 B2
Method and device for self-diagnosing ignition coil of engine of vehicle
Je Hyeon Um, Hwaseong-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed on May 4, 2022, as Appl. No. 17/736,560.
Claims priority of application No. 10-2021-0106109 (KR), filed on Aug. 11, 2021.
Prior Publication US 2023/0052720 A1, Feb. 16, 2023
Int. Cl. F02P 17/12 (2006.01); G07C 5/08 (2006.01)
CPC F02P 17/12 (2013.01) [G07C 5/0808 (2013.01); G07C 5/0825 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for self-diagnosing an ignition coil of an engine of a vehicle, which self-diagnoses an error of the ignition coil configured to supply voltage to a spark plug, the method comprising:
generating, by a self-diagnosis signal generating device included in the ignition coil, a fault flag signal by monitoring a discharge time of a secondary current which flows on a secondary coil of the ignition coil; and
generating, by a controller, a diagnostic trouble code (DTC) according to a duration of the fault flag signal.