Optimum control on fuel injection and air supply forburner-type diesel particulate filter regeneration

In order to realize the optimum control of a burner-type diesel particulate filter (DPF) regeneration, based on the original optimum control model of fuel injection, with the boundary conditions of terminate temperature strengthened by the critical temperature model of inlet channel regeneration, the optimal temperature rising velocity curve of fume gas and the objective functions of optimum control about the fuel injection and air supply were obtained in consideration of the air supply. From the results of online optimization control, the optimal values of fuel injection quantity decreased first and then increased with regeneration time. The trend of corresponding air supply was consistent with that of the optimal fuel injection quantity, but affected by oxygen content in exhaust, the corresponding air supply quantity increased differently over the lowest point. The test results showed: the fuel consumption could be reduced by 34.6% to 40.2% by the optimal control. It provides references on improving the operation level and economic effectiveness in the regeneration process of burner-type diesel particulate filters.