Invention Grant
- Patent Title: Filter failure detection device and particulate matter detection device
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Application No.: US15516163Application Date: 2015-10-02
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Publication No.: US10578518B2Publication Date: 2020-03-03
- Inventor: Hironobu Shimokawa , Kazuhiko Koike , Kensuke Takizawa , Manabu Yoshidome , Masayuki Tamura
- Applicant: DENSO CORPORATION
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2014-203771 20141002; JP2015-184870 20150918
- International Application: PCT/JP2015/078060 WO 20151002
- International Announcement: WO2016/052734 WO 20160407
- Main IPC: G01M15/10
- IPC: G01M15/10 ; G01N15/02 ; F02D41/14 ; F02D41/02 ; G01N15/06 ; G01N1/22 ; G01N35/00 ; G01N27/04 ; F01N3/021 ; F01N11/00 ; G01N15/08
Abstract:
A control unit (6) estimates an output value of a PM sensor (S2) located at a downstream side of a DPF used as a reference filter, and detects whether the estimated output value exceeds a predetermined value (S3). When the estimated output value exceeds the predetermined value (YES in S3), the control unit detects an output value of the PM sensor (S4), and a heater heats the PM sensor (S5). The control unit detects an output value of the PM sensor (S6) after the PM sensor is heated, and calculates a change ratio of the output values of the PM sensor before and after heating (S7). The control unit estimates an average particle size of PM based on the calculated change ratio (S8), and detects whether the DPF has failed based on a comparison result of a corrected output value of the PM sensor with a threshold value.
Public/Granted literature
- US20170307501A1 FILTER FAILURE DETECTION DEVICE, AND PARTICULATE MATTER DETECTION DEVICE Public/Granted day:2017-10-26
Information query
