Matching Research Of Burner-type Diesel Particulate Filter And Vehicle

Diesel Particulate Filter(DPF) is one of the most effective means to control diesel emissions, but particulate matter in the course of their work will continue to be deposited in the filter body, so that the exhaust back pressure increases, which leads the power and economy performance deterioration, and the need to be cleared by regeneration. Only studying DPF, the vehicle will not have the same degree of improvement without matching. Therefore, to carry out research of DPF regeneration and vehicle matching is a certain sense of engineering.Firstly, using simulation software GT-Power module of GT-Suite, establish a model of DPF and simulate their capture process. As particulate matter constantly deposited the filter body, particulate matter collection efficiency decreased and exhaust back pressure increased. And the exhaust gas temperature is 563 K, which can not reach the ignition temperature of particulate matter.Secondly, using GT-Power establish burner-type DPF simulation model to analyze the influence of injection rate of diesel and air to the exhaust temperature. And use DOE(Design of Experiment) function module of GT-Suite to find out how to match the injection rate of diesel and air of exhaust gas flow 0.1 ~ 1.9m3 / s, so that exhaust temperature reaches ignition temperature of particulate matter. Therefore, regeneration of DPF can be completed.Again, use GT-Drive function module of GT-Suite to establish a commercial vehicle simulation model, and then match the DPF simulation model with it. Simulation results show that the model fitted DPF, particulate matter emissions of vehicle drop to 0.031g/km from 0.570g/km, whose emission has been significantly decreased. At the same time, the vehicle's power and fuel economy performance has dropped to a certain degree.Finally, based on the vehicle simulation model, analyze and optimize vehiclel parameters. The original transmission gear ratio of gear1 and gear2 interval is too large, which leads to a sense of frustration evident shift and the engine fuel consumption rate increases. Use DOE(Design of Experiment) function module of GT-Suite optimize each gear parameter. After optimization of gear parameter, fuel consumption per hundred kilometers of vehicle dropped to 16.50 L from 17.16 L, while emissions of particulate matter rose to 0.032g/km from 0.031g/km. Fuel economy is raised, with trace increased of particulate matter emissions, which can still meet the Stage IV emission standard.