公开(公告)号：US20090084097A1

公开(公告)日：2009-04-02

申请号：US12239171

申请日：2008-09-26

申请人： Daisuke SATO ,  Hidetaka MAKI ,  Jun IIDA ,  Eisaku GOSHO ,  Hiroaki NISHINO

发明人： Daisuke SATO ,  Hidetaka MAKI ,  Jun IIDA ,  Eisaku GOSHO ,  Hiroaki NISHINO

IPC分类号： F01N3/021 ,  F01N11/00

CPC分类号： F01N11/002 ,  F01N2550/04 ,  F01N2560/08 ,  Y02T10/47

摘要： An exhaust gas purifying apparatus for an internal combustion engine, including a particulate filter provided in an exhaust passage of the engine; a pressure difference sensor for detecting a pressure difference between upstream and downstream side pressures of the particulate filter; an upstream side passage, which connects the pressure difference sensor and an upstream side with respect to the particulate filter of the exhaust passage; and a downstream side passage, which connects the pressure difference sensor and a downstream side with respect to the particulate filter of the exhaust passage. An exhaust gas flow rate is calculated according to an operating condition of the engine. A characteristic of change in the pressure difference, which is detected by the pressure difference detector and corresponds to a change in the exhaust gas flow rate, is detected. An abnormality of the downstream side passage is determined based on the characteristic of change in the pressure difference.

摘要翻译： 一种用于内燃机的废气净化装置，包括设置在发动机的排气通道中的颗粒过滤器; 用于检测微粒过滤器的上游侧压力和下游侧压力之间的压力差的压力差传感器; 上游侧通道，其连接压力差传感器和相对于排气通道的微粒过滤器的上游侧; 以及将压差传感器和下游侧相对于排气通路的微粒过滤器连接的下游侧通路。 根据发动机的运转状况来计算废气流量。 检测由压差检测器检测出的并对应于废气流量变化的压力差变化的特征。 基于压力差的变化的特性确定下游侧通路的异常。