US 11,692,522 B2
Spark plug heat up method via transient control of the spark discharge current
Ming Zheng, Ontario (CA); Guangyun Chen, Hunan (CN); Xiao Yu, Ontario (CA); Qingyuan Tan, Ontario (CA); Meiping Wang, Ontario (CA); Tangliang Zhang, Hunan (CN); and Jin Qian, Hunan (CN)
Assigned to WEICHAI TORCH TECHNOLOGY CO., LTD., Hunan (CN); and CLEAN COMBUSTION ENGINE TECHNOLOGY INC., Ontario (CA)
Filed by WEICHAI TORCH TECHNOLOGY CO., LTD., Hunan (CN); and CLEAN COMBUSTION ENGINE TECHNOLOGY INC., Ontario (CA)
Filed on Jul. 20, 2021, as Appl. No. 17/381,188.
Application 17/381,188 is a continuation in part of application No. PCT/CN2019/123700, filed on Dec. 6, 2019.
Prior Publication US 2021/0348588 A1, Nov. 11, 2021
Int. Cl. F02P 3/08 (2006.01); F02P 3/09 (2006.01); H01T 13/14 (2006.01); H01T 13/18 (2006.01); H01T 13/20 (2006.01); H01T 13/58 (2020.01)
CPC F02P 3/0838 (2013.01) [F02P 3/093 (2013.01); H01T 13/14 (2013.01); H01T 13/18 (2013.01); H01T 13/20 (2013.01); H01T 13/58 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A spark plug heat up method via transient control of a spark discharge current, wherein a high-temperature plasma channel (103) is used to heat up a central electrode (101), and the temperature and energy of the plasma channel (103) are monitored via transient control of the discharge current; wherein by monitoring a discharge current amplitude and a discharge duration, the temperature change of the central electrode (101) and a ceramic insulator (102) are carefully measured and controlled; wherein the method comprising: measure a heat rating of a spark plug (100) by actively heating up the spark plug (100) via transient control of the continuous discharge current; and precisely control a discharge energy, the discharge duration, and the temperature of the surfaces of the central electrode (101) and the ceramic insulator (102) within a proper window to clean up a carbon deposit on the spark plug as well as realize self-cleaning.