Process and system for controlling the mixture composition for a spark ignition Otto engine with an NOx storage catalyst during a regeneration phase

摘要

A process and a system are used for controlling the mixture composition for an Otto engine with an NOx storage catalyst during a regeneration phase. The process includes controlling, to the value of one, a lambda-value (lambdaM) of an exhaust gas fed to the NOx storage catalyst during a regeneration phase as a function of a lambda-value (lambdaK) of an exhaust gas emitted by the NOx storage catalyst. The system includes a control device for controlling, to the value of one, a lambda-value (lambdaM) of the exhaust gas fed to the NOx storage catalyst during the regeneration phase as a function of the lambda-value (lambdaK) of the exhaust gas emitted by the NOx storage catalyst.