柴油机漏电流式颗粒物传感器有限元热分析  

Thermal Analysis Based on Finite Element Method for Leakage Current Particulate Matter Sensor of Diesel Engine

作　　者：汤东[1] 吴宇哲[1] 李楠[1] 陈烈 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]金坛鸿鑫电子科技有限公司,江苏金坛213200

出　　处：《仪表技术与传感器》2015年第6期8-10,13,共4页Instrument Technique and Sensor

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(K2014-9);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：有限元热分析为车载诊断系统(OBD)漏电流式颗粒物传感器的可靠使用提供依据。建立三维几何模型并依靠A498BPG柴油机的台架试验获得全负荷工况的尾气环境,最终利用ANSYS软件模拟该环境下传感器瞬态及稳态的温度场分布情况。模拟比较了陶瓷加热体使用与否对传感器温度场的不同影响,指出传感器陶瓷加热体需要断续加热且电缆绝缘层应该耐受300℃;模拟为传感器热应力分析提供了必要铺垫。It is proved by finite element method that the leakage current particulate matter sensor of on-board diagnostic system（OBD）can be used responsibly. 3D model was established and the emission environment condition was acquired with a bench test on A498 BPG engine. Finally,numerical simulation was carried out to approach the transient and steady state of temperature fields of the sensor by ANSYS. After a series of comparison on using heater or not,it is pointed out that the ceramic heater need interrupted heating process and the cable in sensor should endure 300 ℃,thus providing basis for thermal stress analysis of the sensor.

关 键 词：颗粒物传感器 柴油机 ANSYS 温度场 陶瓷加热体 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]