Patent ID: 8429904

Claim:
A working machine comprising: a diesel engine having a fuel injector; an exhaust treatment device having a filter to trap particulate matter (PM) contained in exhaust gases of the engine; an electronic controller that outputs a regeneration control signal that compulsorily elevates an exhaust temperature by allowing a certain quantity of fuel to stay in the exhaust gases of the engine to compulsorily regenerate the filter; a regeneration instruction switch device that provides a signal instructing the electronic controller to perform the regeneration control to start the compulsory regeneration; said electronic controller further providing instructions for estimating an actual quantity of PM deposition in the filter; a non-volatile memory which stores a reference quantity of deposition that indicates regeneration timing of the filter in terms of the quantity of PM deposited in the filter; said electronic controller further providing instructions which, when implemented, estimate a movement-associated quantity of PM likely to be deposited during movement of the working machine to a place which is suitable for the compulsory regeneration of the filter, on the basis of a predicted value of either a time required for movement of the working machine to the place of regeneration or a distance to the place of regeneration, determine whether the actual quantity of PM deposition that has been estimated has reached a deposition alarm level derived by subtracting the movement-associated PM deposition quantity from the reference quantity of deposition, and output an alarm signal when the actual quantity of PM deposition has reached the deposition alarm level; and an alarm device that when the alarm signal output by the electronic controller is received, notifies an operator of a time to start the movement of the working machine to the place of regeneration.