PARTICULATE FILTER FAULT DIAGNOSIS METHOD AND DEVICE

Title:

PARTICULATE FILTER FAULT DIAGNOSIS METHOD AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2016/006509

Kind Code:

A1

Abstract:

A particulate filter fault diagnosis method comprising: installing, on a downstream side of a particulate filter disposed in the middle of an exhaust pipe, a PM sensor that causes particulates to deposit in a detection unit and outputs a deposited amount of the particulates; setting an assumption condition for making an assumption that the particulate filter is in such a reference state as to have a predetermined particulate collection capability; calculating, under the assumption condition, a virtual output value corresponding to a virtual deposited amount of the particulates in the PM sensor; and determining that the particulate filter is at fault if, when the virtual output value has reached a predetermined determination threshold value, the output of the PM sensor is equal to or more than the predetermined determination threshold value.

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Inventors:

TSUTSUMI MUNECHIKA (JP)

Application Number:

PCT/JP2015/068959

Publication Date:

January 14, 2016

Filing Date:

July 01, 2015

Export Citation:

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Assignee:

HINO MOTORS LTD (JP)

International Classes:

F01N3/021; F01N3/023

Foreign References:

JP2012122399A	2012-06-28
JP2010275977A	2010-12-09

Other References: