Komatsu Corporation

Akikazu Miyahara

Hideo Oguri

Mitsuyoshi Kimura

Tatsuro Nakazato

Toshihiro Hashimoto

A controller in a form of an engine controller controls an aftertreatment device for a residual substance in exhaust gas. The engine controller includes a regeneration occurrence-condition output unit that outputs regeneration occurrence-condition data indicating occurrence of a regeneration treatment of the aftertreatment device, and a regeneration division detector that detects division of the regeneration treatment by a key-off operation conducted during execution of the regeneration treatment. The regeneration occurrence-condition output unit outputs regeneration occurrence-condition data that is analyzable to show that a regeneration treatment before the division detected by the regeneration division detector and a regeneration treatment after the division are a series of regeneration treatments.

Control device of aftertreatment device, working vehicle, control system, and control method of aftertreatment device

There are provided calculating a differential pressure deposition amount of PM deposited in a DPF based on an exhaust gas flow rate and a differential pressure of the DPF, calculating a model deposition amount of the PM using a model in which a PM amount burned in the DPF is subtracted from the PM amount, calculating a time change rate of the differential pressure deposition amount, and setting a first coefficient to be larger than a second coefficient when the exhaust gas flow rate exceeds a predetermined value and setting the first coefficient to be small when the exhaust gas flow rate exceeds the predetermined value and the time change rate is a predetermined threshold or more when multiplying the differential pressure deposition amount and the model deposition amount by the first and second coefficients, respectively, and calculating an addition value of the respective multiplied values as the PM deposition amount.

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Oyama, Japan

Akikazu Miyahara