Method for enriching the exhaust gas of an internal combustion engine with reducing agent and internal combustion engine for performing such a method

摘要

A method for enriching the exhaust gas of an internal combustion engine with a reducing agent is provided, the internal combustion engine including at least one cylinder and having an intake system for admission of charge air, an exhaust gas discharge system for discharging exhaust gases, and at least one exhaust gas aftertreatment system for reducing nitrogen oxides arranged in the exhaust gas discharge system and which is periodically provided with a supply of reducing agent. The method comprises enriching the exhaust gas with the reducing agent in the exhaust gas discharge system upstream of at least the one exhaust gas aftertreatment system when a fuel supply of the at least one cylinder of the internal combustion engine is deactivated due to an absence of load demand.

主权项

1. A method for an engine, comprising:
responsive to a transient deactivation of fuel injection, enriching engine exhaust gas to regenerate an exhaust aftertreatment device disposed in an exhaust path downstream of the engine, the enriching the engine exhaust gas comprising injecting a reductant via an injector into recirculated exhaust gas upstream of an engine intake.