INJECTOR FAILURE DIAGNOSTIC DEVICE AND INJECTOR FAILURE DIAGNOSTIC METHOD

Title:

INJECTOR FAILURE DIAGNOSTIC DEVICE AND INJECTOR FAILURE DIAGNOSTIC METHOD

Document Type and Number:

WIPO Patent Application WO/2020/203795

Kind Code:

A1

Abstract:

An injector failure diagnostic device 1 is an injector failure diagnostic device of a multi-cylinder internal combustion engine 2 provided with injectors 21-24 that inject fuel for each cylinder. The injector failure diagnostic device 1 comprises: an operation noise acquiring unit 12 that acquires operation noise generated when all the injectors are operated as current operation noise and operation noise generated when fuel injection in one of all the injectors is stopped and the rest of the injectors are operated as pseudo-failure operation time noise with targeting all the injectors; and a failed injector specifying unit 13 that determines whether the pseudo-failure operation time noise of each injector acquired in the operation noise acquiring unit 12 is similar to the current operation noise and specifies a failed injector.

Inventors:

LE TIEN TRIEN (JP)
YOKOYAMA HISASHI (JP)
SAGARA TAKAHIRO (JP)
INOSE SATOSHI (JP)

Application Number:

PCT/JP2020/014096

Publication Date:

October 08, 2020

Filing Date:

March 27, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI CONSTRUCTION MACH CO (JP)

International Classes:

F02M65/00; F02D41/22; F02D45/00; F02M51/06

Foreign References:

JP2009150246A	2009-07-09
JP2000321176A	2000-11-24
JP2015140038A	2015-08-03
JP2014201085A	2014-10-27
JPS63150463A	1988-06-23
JP2005120842A	2005-05-12
JP2019066663A	2019-04-25
JP2002122037A	2002-04-26
JP2016014375A	2016-01-28

Other References: