阅读说明：本技术 用于动态控制过滤效率和燃料经济性的系统和方法 (System and method for dynamically controlling filtration efficiency and fuel economy ) 是由 王玉君 约翰·K·海谢尔贝赫 苏长胜 于 2018-09-28 设计创作，主要内容包括：一种后处理系统,包括SCR系统、第一过滤器和设置在第一过滤器的下游的第二过滤器、以及提供了绕过第二过滤器的流动路径的旁路管道。阀可操作地联接到旁路管道,并且可在关闭位置和打开位置之间移动,在关闭位置,废气流过第二过滤器,在打开位置,废气的至少一部分流过旁路管道。控制器可操作地联接到阀,控制器被配置为基于第一过滤器的第一过滤效率来调节阀,以使从后处理装置排放到环境中的废气具有满足颗粒物质排放标准的颗粒物质数量。(An aftertreatment system includes an SCR system, a first filter and a second filter disposed downstream of the first filter, and a bypass duct providing a flow path that bypasses the second filter. The valve is operatively coupled to the bypass conduit and is movable between a closed position in which exhaust gas flows through the second filter and an open position in which at least a portion of the exhaust gas flows through the bypass conduit. A controller is operatively coupled to the valve, the controller configured to adjust the valve based on the first filtration efficiency of the first filter such that exhaust gas emitted from the aftertreatment device into the environment has an amount of particulate matter that meets particulate matter emission standards.)