| 摘要 |
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. |
