- 专利标题: Exhaust gas purification system of internal combustion engine
- 专利标题(中): 内燃机废气净化系统
-
申请号: US11032166申请日: 2005-01-11
-
公开(公告)号: US07458206B2公开(公告)日: 2008-12-02
- 发明人: Shigeto Yahata , Makoto Saito , Kazuharu Tochikawa
- 申请人: Shigeto Yahata , Makoto Saito , Kazuharu Tochikawa
- 申请人地址: JP Kariya
- 专利权人: Denso Corporation
- 当前专利权人: Denso Corporation
- 当前专利权人地址: JP Kariya
- 代理机构: Nixon & Vanderhye P.C.
- 优先权: JP2004-004910 20040113; JP2004-297379 20041012
- 主分类号: F01N3/00
- IPC分类号: F01N3/00 ; G01N19/10
摘要:
An exhaust gas purification system determines a deposited state of particulate matters based on a differential pressure across a diesel particulate filter (DPF) sensed by a differential pressure sensor. An electronic control unit (ECU) of the system prohibits the determination of the deposited state of the particulate matters, which is performed based on the differential pressure, when uniformity of temperature distribution inside the DPF is low. The ECU estimates temperatures at multiple points inside the DPF distant from an inlet along a direction of a flow of exhaust gas based on the temperature at the inlet sensed by an exhaust gas temperature sensor disposed immediately upstream of the DPF. The ECU determines the uniformity of the temperature distribution inside the DPF based on a range of the temperatures at the multiple points.