DEVICE FOR AND METHOD OF CLEANING EXHAUST GASES OF INTERNAL COMBUSTION ENGINES Russian patent published in 1999 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: according to invention, device installed on cylinder head or directly on exhaust has double-walled housing consisting of two cylindrical coaxially installed shells and end face plugs and exhaust gas inlet and outlet branch pipes. Space between housing walls is filled with gas. Remote controlled limiters are installed in space. At least one catalyst cartridge is installed in housing along its longitudinal axis. Exhaust gas inlet branch pipes are furnished with tips whose shape in cross-section is identical to shape of exhaust gas outlet holes in cylinder head or exhaust manifold. Exhaust gases are cleaned being passed through grainy layer of catalyst in cartridge. Process of reduction of NO_x and oxidation of CO is carried out successively on two types of catalyst at temperature of 250-700 C. EFFECT: provision of deep cleaning of exhaust gases, increased service life of catalyst. 11 cl, 9 dwg