| 摘要 |
The present invention is provided with: an exhaust aftertreatment device 30 in which an oxidation catalyst 31 and an NOx reduction catalyst 32 are arranged in order from an upstream side in an exhaust channel 13 of an internal combustion engine 10; a regeneration control unit 60 that executes regeneration processing whereby the NOx purification capacity of the NOx reduction catalyst 32 is recovered by enriching the exhaust; a flow rate sensor 40 that acquires the air intake flow rate or exhaust flow rate of the internal combustion engine 10; a temperature sensor 43 that acquires the inlet temperature of the oxidation catalyst 31; and an interruption processing unit 75 that interrupts the regeneration processing of the regeneration control unit 60 when a first condition, whereby the temperature acquired by the temperature sensor 43 becomes lower than a lower limit temperature threshold, and a second condition, whereby the flow rate acquired by the flow rate sensor 40 becomes greater than an upper limit flow rate threshold, are met after the regeneration control unit 60 has started regeneration processing. |
