Method for estimating the temperature of an exhaust gas treating catalytic exhaust muffler of an internal combustion engine

摘要

A vehicle engine (1) exhausts through two pipes (2,4), an electric heater (3) and a catalytic convertor (5). Iterative calculations are used to find first the heater temperature (TG) taking into account electrical energy supplied, convective energy from exhaust and heater thermal capacity and then the catalytic convertor temperature (TC) from the heater temperature, the heat released from oxidation and the convertor thermal capacity.