Active regeneration control method and device for particulate trap

Abstract

The invention discloses an active regeneration control method and device for a particulate trap. The method includes the specific steps that monitored pressure difference of a DPF is corrected in real time by monitoring temperature average values before and after exhaust gas of the DPF, accuracy of the pressure difference of the DPF is guaranteed, carbon carrying capacity is obtained through the corrected pressure difference of the DPF and airspeed searching, and therefore accuracy and reliability of the carbon carrying capacity are improved; active regeneration of the particulate trap is controlled according to the carbon carrying capacity, so that the regeneration control is not affected by changes of regeneration temperature and exhaust gas flow of the DPF, and therefore an active regeneration system of the DPF is controlled accurately, active regenerating effect is improved, and fuel oil consumption amount is reduced when active regeneration is performed.

Description

technical field [0001] The invention relates to the field of machinery, in particular to an active regeneration control method and device for a particle trap. Background technique [0002] The main harmful emission from diesel engines is particulate matter, most of which are composed of tiny particles of carbon or carbides. DPF (Diesel Particulate Filter) is a filter device installed on the exhaust system. Its main function is to capture particulate matter before it is discharged into the atmosphere. The captured particulate emissions are burned up during the operation of the vehicle. , can reduce the soot produced by diesel engines to more than 90%. The working principle of the particulate matter filter is: the diesel particulate filter is sprayed with metal platinum and palladium, and the black smoke containing carbon particles discharged from the diesel engine enters the engine exhaust particulate filter through a special pipe, and passes through the densely arranged bel...

AI Technical Summary

Problems solved by technology

[0004] Since the engine exhaust temperature, especially the DPF temperature during regeneration, will rise sharply, the temperature change will cause the DPF differential pressure measurement to change, resulting in inaccurate carbon load query, affecting the start time of active regeneration control, fuel injection The judgment of the amount and the end time of regeneration leads to poor regeneration effect

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