US 12,031,514 B2
Ignition apparatus and control method thereof
Kiseon Sim, Suwon-si (KR); and Soo Hyung Woo, Seoul (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 Jun. 9, 2023, as Appl. No. 18/332,423.
Claims priority of application No. 10-2022-0157100 (KR), filed on Nov. 22, 2022.
Prior Publication US 2024/0167446 A1, May 23, 2024
Int. Cl. F02P 3/05 (2006.01)
CPC F02P 3/053 (2013.01) 14 Claims
OG exemplary drawing
 
1. An ignition apparatus of an engine, comprising:
a spark plug disposed in a combustion chamber of the engine and configured to generate a spark discharge between a center electrode and a ground electrode;
a plurality of ignition coils each configured to apply a current to the spark plug and comprising a primary coil, a secondary coil, a main switch configured to selectively provide current to the primary coil, and an auxiliary switch connected in parallel to the primary coil; and
a controller configured to:
based on an operation region of the engine, selectively perform (i) a multi-stage ignition through a first ignition coil and a second ignition coil among the plurality of ignition coils or (ii) a single-stage ignition through one ignition coil among the first ignition coil and the second ignition coil,
based on a driving point of the engine, adjust a charging speed, a number of discharges, and a discharge maintaining period of the ignition coil that is selected to perform the ignition, and
adjust the charging speed of the ignition coil and a target air/fuel ratio to perform lean combustion based on a state of charge (SOC) of a battery.