Spark plug heat up method via transient control of the spark discharge current

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United States of America Patent

PATENT NO 11692522
APP PUB NO 20210348588A1
SERIAL NO

17381188

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Abstract

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A spark plug heat up method via transient control of the spark discharge current. The high temperature plasma channel is used to heat up the central electrode, and the temperature and energy of the plasma channel are realized via transient control of the discharge current. The heating up process takes place before firing the engine, using discharge current to actively heat up the spark plug from inside. By monitoring the discharge current amplitude and discharge duration, the temperature change of the central electrode and the ceramic insulator can be carefully measured and controlled within a proper window. This method can be used to measure the heating range of the spark plug, and to prevent or remove the carbon deposit on the central electrode and the ceramic insulator generated under various engine operation conditions, such as engine cold start, full load operation, and heavy EGR condition, as well as realize self-cleaning.

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Patent Owner(s)

Patent OwnerAddress
WEICHAI TORCH TECHNOLOGY CO LTD412001 NO 68 HONGQI ROAD NORTH HUNAN ZHUZHOU ZHUZHOU CITY HUNAN PROVINCE 412001
CLEAN COMBUSTION ENGINE TECHNOLOGY INC920 WALLACE AVE WINDSOR ONTARIO N9G1L3

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Guangyun Hunan, CN 2 0
Qian, Jin Hunan, CN 43 148
Tan, Qingyuan Ontario, CA 1 0
Wang, Meiping Ontario, CA 4 18
Yu, Xiao Ontario, CA 53 263
Zhang, Tangliang Hunan, CN 2 0
Zheng, Ming Ontario, CA 105 1237

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