柴油机漏电流式颗粒物传感器可靠性分析与优化

发布时间：2018-05-31 18:54

本文选题：内燃机 + 柴油机　；参考：《内燃机工程》2016年05期

【摘要】：针对柴油机漏电流式颗粒物传感器的基本原理和控制策略,利用发动机台架试验提供的环境边界进行大量有限元模拟,验证了传感器在响应阶段长期工作的可靠性。研究柴油机标定工况恶劣的尾气环境对传感器局部温度和热应力的影响时发现外界对流传热系数的增加利大于弊。发动机冷起动阶段传感器的热应力先增大后减小,加热功率约为60W时可以保证传感器安全快速地进入响应阶段。
[Abstract]:Aiming at the basic principle and control strategy of diesel engine leakage current particle sensor, a large number of finite element simulations are carried out by using the environmental boundary provided by engine bench test, which verifies the reliability of the sensor working in the response stage for a long time. It is found that the increase of external convection heat transfer coefficient is more beneficial than the disadvantage when studying the influence of the bad exhaust environment on the local temperature and thermal stress of the diesel engine. The thermal stress of the engine in the cold start phase first increases and then decreases. When the heating power is about 60 W, the sensor can enter the response phase safely and quickly.
【作者单位】：江苏大学汽车与交通工程学院;金坛鸿鑫电子科技有限公司;
【基金】：江苏省国际合作项目(BZ2012025) 内燃机燃烧学国家重点实验室开放课题项目(K2014-9) 江苏高校优势学科建设工程资助项目(PAPD)
【分类号】：U464.172

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