DIAGNOSTIC DEVICE AND DIAGNOSTIC SYSTEM

Title:

DIAGNOSTIC DEVICE AND DIAGNOSTIC SYSTEM

Document Type and Number:

WIPO Patent Application WO/2016/136818

Kind Code:

A1

Abstract:

A diagnostic device of a sensor (100) which detects nitrogen compounds in exhaust gas, provided in an exhaust gas passage (11) of an internal-combustion engine (10) of a vehicle, wherein said diagnostic device is provided with: an offset diagnosing unit (42) which, on the basis of a sensor value from the sensor (100), diagnoses an amount of offset from a zero point of the sensor value during deceleration of the vehicle, in which the internal-combustion engine (10) has stopped injecting fuel; and a diagnosis blocking processing unit (44) which blocks the offset amount diagnosis if the exhaust gas flow rate from the internal-combustion engine (10) suddenly increases while the offset amount is being diagnosed by the offset diagnosing unit (42).

Inventors:

HASEGAWA KEN (JP)
TAKAHASHI HIROTAKA (JP)
MINEZAWA MASANOBU (JP)

Application Number:

PCT/JP2016/055457

Publication Date:

September 01, 2016

Filing Date:

February 24, 2016

Export Citation:

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Assignee:

ISUZU MOTORS LTD (JP)

International Classes:

F02D45/00; F01N3/00; F01N3/18; F01N3/24; G01N27/26; G01N27/416

Foreign References:

JP2010071195A	2010-04-02
JP2009216042A	2009-09-24
JP2013185575A	2013-09-19
JP2002539448A	2002-11-19

Other References: