为了适应国家排放法规对汽油直喷发动机颗粒物监测粒径逐渐减小的要求，根据汽油直喷发动机排放开发目标，设计不同的汽油机颗粒捕集器（GPF）技术方案，通过发动机台架试验、转毂试验的测试选型确定捕集效率高、背压小的最优方案。建立了基于发动机原排和压差的GPF控制策略，结合GPF测试选型数据标定GPF碳载量模型、再生效率模型等，实现再生工况识别并协调再生控制。通过WLTC排放循环验证GPF控制策略，最优方案的捕集效率满足排放开发目标，有效降低了汽油直喷汽油机的颗粒物排放。

In order to meet the requirements of China emission regulation for reducing the particle size of gasoline direct injection engines, different gasoline particulate filter(GPF) technology schemes were designed based on emission development goals, and the optimal scheme with high capture efficiency and low back pressure was determined through test bench and hub testing. The GPF strategy was established based on engine raw emission and pressure difference, the carbon load model and regeneration efficiency model were calibrated according to GPF test data, and the identification of regeneration conditions and regeneration control were realized. The control strategy was verified through the WLTC emission cycle. The capture efficiency of the optimal GPF met the requirements of emission target, which reduced PN pollutants of gasoline direct Injection engine effectively.