INJECTOR DIAGNOSIS DEVICE, AND INJECTOR DIAGNOSIS METHOD

Title:

INJECTOR DIAGNOSIS DEVICE, AND INJECTOR DIAGNOSIS METHOD

Document Type and Number:

WIPO Patent Application WO/2020/218510

Kind Code:

A1

Abstract:

An injector diagnosis device 1 comprises: an engine noise model generation unit 14 that, on the basis of the number of engine cylinders and an engine explosion pattern, generates a normal engine noise model and an abnormal engine noise model; an operation noise acquisition unit 12 that acquires an operation noise of the engine running according to the explosion pattern; a frequency characteristic calculation unit 13 that calculates a frequency characteristic of the operation noise acquired by the operation noise acquisition unit 12; and an injector diagnosis unit 15 that diagnoses the presence/absence of an injector fault on the basis of the operation noise frequency characteristic calculated by the frequency characteristic calculation unit 13, and the normal engine noise model and the abnormal engine noise model generated by the engine noise model generation unit 14.

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Inventors:

LE TIEN TRIEN (JP)
YOKOYAMA HISASHI (JP)
INOSE SATOSHI (JP)
KUNIOKA SHOGO (JP)

Application Number:

PCT/JP2020/017693

Publication Date:

October 29, 2020

Filing Date:

April 24, 2020

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACH CO (JP)

International Classes:

F02D45/00; F02D41/22

Foreign References:

JP2009150246A	2009-07-09
JP2005120842A	2005-05-12
JP2001221096A	2001-08-17
JP2020002897A	2020-01-09
JP2019086099A	2019-06-06
JP2002122037A	2002-04-26
JP2016014375A	2016-01-28
JP2009146086A	2009-07-02
JP2010089760A	2010-04-22

Other References: