本文研究了壁流式DPF系统基于压降特性的失效诊断策略。

This paper studies up on the strategy for failure diagnosis of wall-flow DPF system based on pressure drop characteristics.

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DPF失效诊断是通过车载挂烟试验进行的，为了验证本诊断策略的可行性，试验分别进行了空载、中等载荷和满载试验。

DPF failure diagnosis is carried out by on-board smoke hanging test, to verify the feasibility of this diagnosis strategy, no-load, medium load and full-load test are respectively carried out.

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而D PF技术，作为轻型车尾气后处理技术的主流技术，对DPF的失效诊断，是整个DPF技术obd系统中的关键点。

And DPF technology is the mainstream technology of tail gas after-treatment technology for light vehicle, the failure diagnosis of DPF is the key point of OBD system in the entire DPF technology.

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