ABNORMALITY DETECTION DEVICE AND ABNORMALITY DETECTION METHOD FOR EGR SYSTEM

Title:

ABNORMALITY DETECTION DEVICE AND ABNORMALITY DETECTION METHOD FOR EGR SYSTEM

Document Type and Number:

WIPO Patent Application WO/2011/132289

Kind Code:

A1

Abstract:

In order to more optimally detect abnormalities in an internal combustion engine EGR system equipped with a high-pressure EGR device and a low-pressure EGR device, an allowable flow-rate ratio range, which is the range in which the degree of deterioration of the exhaust characteristics of the internal combustion engine falls within an allowable level, is calculated with regards to the EGR gas flow-rate ratio, which is the ratio of the amount of high-pressure EGR gas and the amount of low-pressure EGR gas (S103 to S107). In addition, the EGR system is assessed as abnormal in cases in which an estimate of the EGR gas flow-rate ratio deviates from said allowable flow-rate ratio range (S109 to S112).

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Inventors:

TAIRA SHINYA (JP)
NAKAMURA YOSHITAKA (JP)
KIDOKORO TORU (JP)
SAWADA HIROSHI (JP)

Application Number:

PCT/JP2010/057150

Publication Date:

October 27, 2011

Filing Date:

April 22, 2010

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
TAIRA SHINYA (JP)
NAKAMURA YOSHITAKA (JP)
KIDOKORO TORU (JP)
SAWADA HIROSHI (JP)

International Classes:

F02M25/07

Foreign References:

JP2008223554A	2008-09-25
JP2007127037A	2007-05-24
JP2009074459A	2009-04-09
JP2009002184A	2009-01-08
JP2008175131A	2008-07-31
JP2009002184A	2009-01-08

Other References: