METHOD AND SYSTEM FOR ACCELERATION OF CATALYST ACTIVATION AT COLD START OF ENGINE Russian patent published in 2019 - IPC F01N3/20 F02B37/12 

FIELD: internal combustion engines.

SUBSTANCE: present invention may be used in turbocharged internal combustion engines. Turbo-charger system includes shaft (161) connected with possibility of rotation with turbine (164) and compressor (162), and mechanism (166) of shaft retention. Shaft retention mechanism (166) is made with possibility of shaft (161) motion braking depending on engine (100) cold start conditions. Shaft retention mechanism (166) is a passive mechanism for retaining the shaft. Passive mechanism of shaft retention contains material with phase transition surrounding shaft (161) and located inside recesses of shaft (161). Disclosed are versions of a method of accelerating catalyst activation.

EFFECT: technical result consists in reduction of speed of exhaust gases passing along spiral trajectory through outlet branch pipe downstream of turbine supercharger, and in reduction of heat losses by exhaust gases when exhaust gases pass catalyst.

14 cl, 9 dwg