下游氧传感器稀到浓响应慢故障诊断方法的研究  

Research of Diagnosing Slow Response to Lean to Rich Mixture from Downstream Oxygen Sensor

作　　者：何小明[1] 陈领平[1] 陈龙[1] 洪伟春[1] 

机构地区：[1]泛亚汽车技术中心有限公司,上海201201

出　　处：《内燃机与动力装置》2013年第3期32-34,47,共4页Internal Combustion Engine & Powerplant

摘　　要：本文分析了电喷系统的下游氧传感器从稀到浓响应慢的特性及其带来的影响,阐述了产生这种现象的中毒原因和机理,选择具有可行性强、可靠性高的方案,同时借鉴催化器怠速插入试验的特性,设计了下游氧传感器从稀到浓响应慢故障的插入诊断逻辑,最后进行了试验验证,提高了OBD系统的完整性。The paper analyzes the characteristic that the downstream oxygen sensor slowly re- sponse to lean to rich mixture and its influence and describes the reasons leading such phenomenon, selects a highly feasible and reliable plan, design and validate a new interrupting diagnostic logic on lean to rich slow response for the downstream oxygen sensor. This improves the integrality of OBD system.

关 键 词：下游氧传感器 中毒 响应 诊断 插入试验 

分 类 号：TK411.5[动力工程及工程热物理—动力机械及工程]