Exhaust gas treatment system for internal combustion engine incorporates two catalytic converters in series followed by soot and particulates filter with air supply and two silencers in series

摘要

The internal combustion engine (1) has a compressor (6) supplying air to a reservoir (7). It flows through a computer (9) controlled regulating valve (8) to supply additional air (ZL) to a mixer (3) just upstream of a soot and particulates filter (4). Exhaust gas passes from the exhaust manifold (11) through a catalyzer stage (2) with first (21) and second (22) exhaust gas catalyzers in series. It then passes through the mixer and the soot filter and then passes through two silencers (5) in series.