Research on the Correction of Regeneration Opportunity of DPF Using GW4D20 Engine

The accurate diagnose of the timing of regeneration is the key factor of solving the problem that the filter body is damaged and the process of regeneration is uncomplete. The timing of regeneration judged by the exhaust back pressure is a type of widely accepted control method, the essence of which means to estimate whether the quantity of particle in the filter can fulfil the demand of regeneration or not. In the process of practical application, this kind of method is influenced by the engine conditions, therefore, we must monitor the engine at any moment by speed and load of signal acquisition.In this article,it summarizes two dimensional pulse spectrum" exhaust flow--pressure drop” through universal characteristics test. Meanwhile it conducts the temperature correction in order to simplify the complexity of the judge-ment of regeneration opportunity.