Operating burner receiving exhaust gas of IC engine - regenerating particle filter installation producing flame in variable manner

摘要

The burner (2) is supplied with the exhaust gas of an IC engine(3), as supply air, for regenerating a particle filter system. The burner is supplied with fuel in a controlled manner, and the burner output is regulated at least depending on the temp. (Ta) of the combustion gases, delivered from the burner before entering the particle filter(7) with the following steps: a) The combustion quality is determined on the basis of the fuel: air ratio (lambda). b) The output regulation of the burner is interrupted and the fuel supply is reduced for a predetermined period (t Relax), with unsatisfactory combustion condition(lambda is less than 1) c) The combustion quality is determined on the same basis after a second predetermined period(T Recreate), after the redn. of the fuel supply. d) With the determination of a further unsatisfactory combustion quality(1), the steps b) and c) are repeated. e) With the determination of an unsatisfactory combustion quality, the output regulation of the burner is again resumed. ADVANTAGE - Too rich combustion mixture at least depending on temp. is prevented in most simple manner possible.