Method for determining secondary fuel mass flow and secondary air mass flow of external burner in exhaust system of combustion engine, involves setting operating point of external burner according to predetermined criteria

摘要

The method involves constructing the lines (32,34) representing secondary fuel mass flow of external burner in exhaust system, in two-dimensional coordinate system by using preset expressions. The lines (38,40,42,44,46) are constructed as a function of secondary fuel mass flow and secondary air mass flow of external burner in exhaust system, in two-dimensional coordinate system by using preset expressions. An operating point (56) for operation of external burner according to predetermined criteria is set in the regions (48,50) formed between the lines (40,44).