1998-02-23

Considerations on the Temperature Distribution and Gradient in the Filter During Regeneration in Burner Type Diesel Particulate Trap System (II) 980188

In this paper, the general effects of the regeneration parameters, such as initial particulate loading, space velocity, oxygen concentration and inlet gas temperature, on the combustion of the particulate matter (PM) filtrated in the ceramic filter of a diesel particulate filter (DPF) system are considered experimentally.A new method to control the combustion rate of the PM during regeneration is also studied for the protection of the ceramic cordierite filter. It controls the temperature of gas entrained into the filter during re-generation, which was previously not considered as a controllable factor in the vehicle[1, 2, 3, 4 and 5]. Control of gas temperature was achieved by controlling the flow rate of engine exhaust gas entrained into the filter during regeneration.Furthermore, some characteristics of the trap peak temperature and temperature gradients occurred during regeneration by the new method are discussed, which concern the engine operating conditions and geometric shape of the filter.

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