FILTER FAILURE DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

FILTER FAILURE DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2012/053097

Kind Code:

A1

Abstract:

A filter failure detection device for an internal combustion engine more accurately detects a failure of a filter (3). The filter failure detection device for an internal combustion engine is provided with: the filter (3) provided in the exhaust path (2) of the internal combustion engine (1) and collecting substances contained in the exhaust gas; a substance amount detection section (4) provided in the exhaust path (2) at a position downstream of the filter (3) and detecting the amount of the substances in the exhaust gas; a flow speed detection section (10) for detecting or estimating the flow speed of the exhaust gas passing through the filter (3); and a determination section (10) for determining that the filter (3) has a failure when the ratio of the amount of change in the amount of the substances to the amount of change in the flow speed of the exhaust gas increases as the flow speed of the exhaust gas passing through the filter (3) increases.

Inventors:

SHIBATA DAISUKE (JP)
SAWADA HIROSHI (JP)
KIDOKORO TORU (JP)
HAGIMOTO TAIGA (JP)
TAKAOKA KAZUYA (JP)

Application Number:

PCT/JP2010/068702

Publication Date:

April 26, 2012

Filing Date:

October 22, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TOYOTA MOTOR CO LTD (JP)
SHIBATA DAISUKE (JP)
SAWADA HIROSHI (JP)
KIDOKORO TORU (JP)
HAGIMOTO TAIGA (JP)
TAKAOKA KAZUYA (JP)

International Classes:

F01N3/02

Foreign References:

JP2005325812A	2005-11-24
JP2007315275A	2007-12-06
JP2009144577A	2009-07-02
JP2005524015A	2005-08-11
JP2007327392A	2007-12-20
JP2008101606A	2008-05-01

Other References: