Patent ID: 11923663
Assignee: WEICHAI TORCH TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. 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.