Research on Balance Point Temperature for DPF Regeneration

The reduction of particulate matter (PM) emission from Diesel engines is an important challenge due to their adverse effects on human health and environment. Therefore, Diesel particulate filters (DPF) are used to trap PM in the gas exhaust lines. DPF must be regenerated periodically by burning off the PM deposit in order to prevent high back pressure level. It is well known that Balance Point Temperature is an important parameter for the DPF regeneration test. The following study concentrates on the way to calculate the Balance Point Temperature. The after-treatment used include a Diesel oxidation catalyst (DOC) and a DPF. An experiment is designed to inject LPG to DOC, which can oxidize HC and increase the exhaust temperature. The experimental data are used to calculate the Balance Point Temperature by the mathematic method, which can calculate the Balance Point Temperature more accurately.