Abstract
The main problem in conventional diesel engines and HCCI diesel is reduction of solid particles emitted to atmosphere. Regeneration of particle filters requires additional energy for combustion of soot (additional fuel or electric energy) after some period of the engine work as a result of closing of substrate pores by soot. The innovation method takes into account a self-regeneration of diesel particle filter by use of special heat recovery system. The paper shows one of possible design of DPF self-regeneration. The exhaust temperature behind the turbine and catalytic converter is very low and particularly for HCCI engine the emission of particles is low in comparison to conventional diesel engines. For that case an additional energy is required for increase of gas temperature before DPF, which can be recovered from burning gases flowing through heat exchanger at the inlet of DPF. The preliminary studies show a possibility of using the special design of DPF with heat recovery system. The paper presents the simulation results of such system and possibility of increasing the heat recovery ratio by change of geometry of DPF. The gas heat exchange formulas between DPF and the heat exchange model are partly included in the paper. The preliminary results of calculations show the possibility of increase of exhaust gases in front of DPF about 20%, which enables a continuous regeneration of DPF. The method enables to recover some part of energy which is lost in the conventional DPF.
Keywords: Transport, compression ignition engine, diesel particle filter, regeneration