DEVICE FOR REDUCING SMOKE IN LIGHT-OIL VEHICLES FOR A RAPID ACCELERATION RESPONSE

摘要

The present invention relates to a partial DPF (Partial Diesel Particulate Filter; referred to hereinbelow as a pDPF) device. It is an aim of the present invention to provide a device for reducing smoke in light-oil vehicles for a rapid acceleration response, in which a metal filter, which has been optimally designed for removing particulate matter produced during constant-speed running, is provided with an additional filter constructed in such a way as to minimise the discharge characteristics under rapid acceleration conditions while not greatly increasing the volume. The device for reducing smoke in light-oil vehicles for a rapid acceleration response of the present invention is an exhaust emission control device which is inserted into the exhaust pathway of a diesel engine, characterised in that it comprises: an oxidation catalyst (200) which uses a catalytic reaction to remove some of the harmful substances in the exhaust gas including CO, THC, NOx and SOF; a composite filter (100) which comprises a main filter (110) and a reinforcing filter (120) fitted over the outer circumference of the main filter (110), and which is for removing some of the harmful substances in the exhaust gas including soot; and a case for accommodating the oxidation catalyst (200) and composite filter (100) either integrally or individually, and in that the oxidation catalyst (200) and composite filter (100) are disposed sequentially from the upstream side of the flow of the exhaust gas.