Generation method and device for ash removing treatment request of diesel particulate filter (DPF)

Abstract

The invention discloses a generation method and device for an ash removing treatment request of a diesel particulate filter (DPF). After DPF regeneration treatment, the carbon carrying capacity of theDPF is calculated according to a preset carbon carrying capacity calculation model, whether the carbon carrying capacity is lower than a preset carbon carrying capacity is judged, if yes, a current operating parameter of a diesel engine is acquired, whether the operating parameter meets a preset operating condition is judged, if yes, flow resistance values of the DPF are calculated, whether the flow resistance values of the DPF are all not smaller than a preset flow resistance threshold value in a preset duration is judged, if yes, a stored number of current overrun times is increased, otherwise, the stored number of current overrun times is set to be zero, whether the stored number of current overrun times is larger than a preset number of times is judged, and if yes, an ash removing treatment request is output. Therefore, when regeneration of the DPF is insufficient and a certain carbon carrying capacity exists, whether the ash content of the DPF exceeds a threshold is accurately judged, and the ash removing treatment request is generated at a right moment for ash removing treatment of the DPF.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a method and device for generating a dust cleaning request of a particle trap. Background technique [0002] Diesel Particulate Filter (DPF, Diesel Particulate Filter) is a ceramic filter installed in the diesel engine exhaust system. It can capture and collect particulate matter in the exhaust gas of diesel engines and prevent them from entering the air. It is an effective device to solve the problem of diesel engine particulate matter emissions. . [0003] The DPF will be regenerated to remove the accumulated particulate matter inside. After each regeneration process, there will be ash after the combustion of particulate matter inside the DPF. The continuous accumulation of ash will increase the back pressure of the diesel engine and cause the performance of the diesel engine to decline. Therefore, when the ash in the DPF accumulates to a certain amount, it is necessary...

AI Technical Summary

Problems solved by technology

[0005] However, when the DPF regeneration is insufficient (such as insufficient regeneration temperature), there will be a certain carbon load in the DPF

These carbon loads will affect the measurement accuracy of relevant parameters such as the pressure difference at both ends of the DPF to determine whether the ash conte

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