Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2018/159718
Kind Code:
A1
Abstract:
A filter (30) of an exhaust gas purifying device (27) collects particulate matter in exhaust gas discharged from an engine (13). A filter inlet side pressure sensor (34) is provided on an inlet side (upstream side) of the filter (30). An EGR valve inlet side pressure sensor (22) is provided on an inlet side of an EGR valve (20). A regeneration controller (38C) built into a control device (38) determines whether the filter inlet side pressure sensor (34) is failing on the basis of a difference between a pressure value detected by the filter inlet side pressure sensor (34) and a pressure value detected by the EGR valve inlet side pressure sensor (22). If the filter inlet side pressure sensor (34) is determined to be failing, the regeneration controller (38C) controls a regeneration process using a differential pressure calculated on the basis of the pressure value detected by the EGR valve inlet side pressure sensor 22 and a pressure value detected by a filter outlet side pressure sensor (35).
Inventors:
NOGUCHI SHUUHEI (JP)
YOSHIDA HAJIME (JP)
NAKABAYASHI TETSUYA (JP)
YOSHIDA HAJIME (JP)
NAKABAYASHI TETSUYA (JP)
Application Number:
PCT/JP2018/007637
Publication Date:
September 07, 2018
Filing Date:
February 28, 2018
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD (JP)
International Classes:
F01N3/00; F01N3/023; F01N3/033; F01N3/18; F02D45/00; F02M26/15
Domestic Patent References:
| WO2013105372A1 | 2013-07-18 | |||
| WO2008078577A1 | 2008-07-03 | |||
| WO2015001955A1 | 2015-01-08 |
Foreign References:
| JP2016109058A | 2016-06-20 | |||
| JP2015031187A | 2015-02-16 |
Other References:
See also references of EP 3492717A4
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
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