Weichai Power has developed a spark plug heat rating measurement method and system using spark discharge current for precise evaluation. By controlling discharge current and measuring temperature changes, the heat rating of spark plugs with different ceramic insulation structures can be determined in real-time. GlobalData’s report on Weichai Power gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Weichai Power, was a key innovation area identified from patents. Weichai Power's grant share as of February 2024 was 71%. Grant share is based on the ratio of number of grants to total number of patents.
Spark plug heat rating measurement method based on spark discharge
A recently granted patent (Publication Number: US11923663B2) discloses a novel method for measuring the heat rating of spark plugs based on spark discharge current active heating. The method involves precisely adjusting the spark discharge current during a spark discharge process to control the temperature of the spark plasma channel, heating up the high-voltage central electrode of the spark plug. By measuring the temperature changes of the central electrode and surrounding ceramic insulator, the heat rating of the spark plug can be evaluated. The method further includes placing the spark plugs in a temperature detection module to measure temperature changes and evaluate heat dissipation characteristics, allowing for a comparison of spark plugs with different heat ratings.
Additionally, the patent describes a spark plug heat rating measurement system that includes a constant spark discharge current control module, a real-time module, a spark discharge current measurement module, a temperature detection module, and the tested spark plug. The system enables real-time monitoring and control of the spark discharge current levels to heat up the central electrode of the spark plug. By utilizing temperature measurement modules and thermocouple systems, the system can accurately measure temperature changes during the discharge process and evaluate the heat rating of the spark plug. The system also includes a constant temperature water jacket cooling chamber to ensure consistent testing conditions. Overall, the patented method and system provide a comprehensive approach to evaluating spark plug heat ratings based on active heating and real-time monitoring of temperature changes.
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