Control system for controlling flow of fresh air injected into diesel engine of car, has intake control unit regulating flow of fresh air by delaying closure of intake flap during transition from normal combustion mode to trap's purge mode

摘要

The system has an intake control unit (37) regulating flow of fresh air injected into an internal combustion engine by delaying closure of intake flap with respect to a recirculation flap during transition from a normal combustion mode to a purge mode of a nitrogen oxide trap. An estimation unit estimates an air mass flow (Qmot) injected into the engine, and a measurement unit measures pressure at outlet of the intake flap. A temperature measurement unit measures temperature at the outlet of the intake flap. An independent claim is also included for a method for controlling flow of fresh air injected into an internal combustion engine.