ACTIVE AIR FLAP FUEL EFFICIENCY IMPROVEMENT CONTROL METHOD AND ACTIVE AIR FLAP INTEGRATION SYSTEM

摘要

In an active air flap (AAF) integration system according to the present invention, when an engine electronic control unit (ECU) (50) determines the necessity of securing a cooling amount of a cooling system by detecting an engine load when a thermostat (23) is opened after an ignition switch IG is turned on, a fuel improvement control method is embodied in an AAF fuel efficiency improvement mode of individually performing or interlockingly performing vehicle-induced wind introduction based on AFF_OPEN of an AAF (30) or vehicle-induced wind introduction cutoff based on AFF_CLOSE and liquid injection based on SCS_ON of an auxiliary cooler (40) or liquid injection cutoff based on SCS_OFF, thereby preventing fuel efficiency from decreasing by shortage of a cooling amount of a cooling system when the AFF (30) is operated. Particularly, an AFF_OLD operation is interlocked with a water cooling effect of a radiator (21) based on evaporation heat, thereby also improving fuel efficiency of a high-power engine requiring a sufficient amount of cooling.;COPYRIGHT KIPO 2017