Title:
CONSTRUCTION MACHINE FUEL FILTER CLOGGING DETECTOR
Document Type and Number:
Japanese Patent JP2015055215
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a construction machine fuel filter clogging detector capable of accurately grasping fuel filter replacement timing even if a fuel injection valve degrades over time.SOLUTION: The present invention includes: a determination pressure sensor 21 that detects a pressure of fuel passing through a fuel filter 18; a clogging determination unit 25 determining whether the fuel filter 18 is clogged by comparing the pressure detected by this determination pressure sensor 21 with a clogging determination reference value b; a common rail pressure sensor 30 detecting an internal pressure of a common rail 16; an engine emergency stop switch 24 causing an injector 19 to stop injecting the fuel; and a correction unit 26 correcting the clogging determination reference value b in response to the pressure detected by the common rail pressure sensor 30 if an engine 11 operates to allow a fuel supply unit 17 to supply the fuel in a state in which this engine emergency stop switch 24 causes the injector 19 to stop injecting the fuel.
Inventors:
NAKAMOTO TAKUSHI
ARAI YASUSHI
MINAMI WATARU
ITOGA KENTARO
ARAI YASUSHI
MINAMI WATARU
ITOGA KENTARO
Application Number:
JP2013189607A
Publication Date:
March 23, 2015
Filing Date:
September 12, 2013
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F02M37/22
Domestic Patent References:
| JP2005104392A | 2005-04-21 | |||
| JP2008158994A | 2008-07-10 | |||
| JP2009257103A | 2009-11-05 | |||
| JP2005104392A | 2005-04-21 | |||
| JP2008158994A | 2008-07-10 | |||
| JP2009257103A | 2009-11-05 | |||
| JP2006283724A | 2006-10-19 | |||
| JP2010106682A | 2010-05-13 | |||
| JP2008240558A | 2008-10-09 | |||
| JPH07150979A | 1995-06-13 |
Attorney, Agent or Firm:
Patent business corporation Takekazu international patent firm