Spark plug heat rating measurement method and system based on spark discharge current active heating

A spark plug heat rating measurement system based on discharge current active heating, wherein:

• the system comprises 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 constant spark discharge current control module is connected to a high-voltage terminal of the tested spark plug;
• the constant spark discharge current control module provides a real time-controlled spark discharge current to heat up a high-voltage central electrode of the tested spark plug;
• the spark discharge current measurement module is connected to both the tested spark plug and the real-time module;
• the spark discharge current measurement module is used to real time measure a spark discharge current amplitude and provides measurement results to the real-time controller;
• the temperature detection module is connected to both the tested spark plug and the real-time module;
• the temperature detection module is used to monitor temperatures of the high-voltage central electrode and the surrounding ceramic insulator of the tested spark plug, and feedback temperature signals to the real-time module;
• the real-time module dynamically monitors and controls output discharge current level of the constant spark discharge current control module;
• wherein:
• the temperature measurement module includes the temperature measurement module, and a thermocouple temperature measurement system;
• the temperature measurement module is mainly used to measure the temperature changes of the high-voltage central electrode and the surrounding ceramic insulator of the tested spark plug during a discharge process, and provides a temperature information to a real-time controller consisted of the real-time module;
• the temperature profiles of the high-voltage central electrode and the surrounding ceramic insulator measured during the discharge process are used as parameters to evaluate the heat rating of the tested spark plug;
• the tested spark plug is installed in a constant temperature water jacket cooling chamber;
• the thermocouple temperature measurement system is used to measure the temperature of the constant-temperature water jacket chamber, and feedback to the real-time controller;
• the real-time controller controls a cooler, to ensure the temperature of the constant temperature water jacket cooling chamber is within 0-80° C.