Self-adapting control method for an exhaust system for internal combustion engines with controlled ignition

摘要

A self-adapting control method for an exhaust system for internal combustion engines with controlled ignition, including an engine (2), a pre-catalyst (4), a trap for the collection of nitrogen oxides (5) having a maximum initial capacity (CM) and a maximum available capacity (CMD) not greater than this maximum initial capacity (CM) and a linear oxygen sensor (7) disposed downstream of the trap for the collection of nitrogen oxides (5) and generating at least a downstream composition signal (V2) substantially proportional to a downstream oxygen titre ( lambda V). The method comprises the stages of carrying out at least one regeneration process and carrying out at least one desulphurisation process of the trap for the collection of nitrogen oxides (5) and also the stage of estimating, at least after each regeneration process, the maximum available capacity (CMD) as a function of the maximum initial capacity (CM) and the downstream composition signal (V2). <IMAGE>