基于模型的DPF再生温度控制策略开发及验证

解同鹏^1,2，高翠^1,2，鹿文慧^1,2，张善星^1,2，李兰菊^1,2

1.内燃机可靠性国家重点实验室，山东 潍坊  261061；

2.潍柴动力股份有限公司，山东 潍坊  261040

摘要：为精确控制柴油机颗粒捕集器（diesel particulate filter, DPF）的再生温度，避免因再生失控引起的DPF失效风险，在柴油机氧化催化器（diesel oxidation catalyst，DOC）和DPF组成的后处理系统上建立基于化学反应动力学原理的DOC温度模型，在温度模型和再生温度控制算法的基础上设计DPF再生温度前馈及反馈控制策略；利用发动机台架测试数据进行控制策略联合仿真，对控制参数进行系统整定及优化；通过发动机台架瞬态及稳态工况测试，验证控制策略的实际应用效果。仿真和台架试验结果表明：DPF再生温度控制策略具有很好的动态性能及稳态性能，最大峰值温度及燃油喷射量均控制在限定范围，可确保DPF实现高效可靠的再生。

关键词：柴油机；DPF；DOC；再生温度；控制策略

Development and verification of control strategy for DPF regeneration temperature based on model

XIE Tongpeng^1，2, GAO Cui^1，2, LU Wenhui^1，2, ZHANG Shanxing^1，2, LI Lanju^1，2

1.The State Key Laboratory of Reliability of Engine, Weifang 261061, China; 2.Weichai Power Co., Ltd., Weifang 261061, China

Abstract：In order to accurately control the regeneration temperature of diesel particulate filter (DPF) and avoid DPF failure caused by malfunction regeneration, a regeneration temperature model based on the principle of chemical reaction kinetics is established on the post-treatment system consist of diesel oxidation catalyst (DOC) and DPF. Based on DOC temperature model and regeneration temperature control algorithm, the DPF regeneration temperature feedforward and feedback control strategies are designed; the control strategy is co-simulated based on the engine bench test data, and the control parameters are optimized; the actual performance of the control strategy is verified by transient and steady state tests. The simulation and bench test results indicate that the DPF regeneration temperature control strategy shows good dynamic and steady-state performance, and the maximum peak temperature and fuel injection volume are controlled within a limited range to ensure efficient and reliable regeneration of DPF.

Keywords:diesel engine; DPF; DOC; regeneration temperature; control strategy