CONSTRUCTION MACHINE - HITACHI CONSTRUCTION MACHINERY

Title:

CONSTRUCTION MACHINE

Document Type and Number:

WIPO Patent Application WO/2013/105423

Kind Code:

A1

Abstract:

A regenerator (22), which performs a regeneration process on a particulate matter removal filter (21), estimates the collection quantity of particulate matter collected by the filter (21) using a dual system. Specifically, said dual system comprises: a means for estimating a first estimated collection quantity (Q1) on the basis of the rotational speed (N) of an engine (10) and a fuel injection quantity (F); and a means for estimating a second collection quantity (Q2) on the basis of a differential pressure in the particulate matter removal filter (21). The regenerator (22) determines whether or not to perform the regeneration process according to whether or not at least one of the estimated collection quantities among the two estimated collection quantities (Q1, Q2) is greater than or equal to a preset collection quantity threshold value (Qs). In addition, the regenerator (22) determines that there is a malfunction in the regenerator (22) if the second estimated collection amount (Q2) becomes larger than the first estimated collection quantity (Q1).

Inventors:

NOGUCHI SHUUHEI (JP)
YOSHIDA HAJIME (JP)

Application Number:

PCT/JP2012/083372

Publication Date:

July 18, 2013

Filing Date:

December 24, 2012

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACHINERY (JP)

International Classes:

F01N3/023; E02F9/00; F01N3/025; F01N3/029; F01N3/18; F02D29/00; F02D29/04; B01D46/42

Foreign References:

JP2004076589A	2004-03-11
JP2002256846A	2002-09-11
JPH07317529A	1995-12-05
JPH03199616A	1991-08-30
JP2010065577A	2010-03-25
JPH1113455A	1999-01-19
JP2004132358A	2004-04-30
JPH0711935A	1995-01-13

Other References: