A ventilation module for a vehicle passenger compartment interior for providing dampening opening and closing motion, such as in response to an instantaneous interior pressure event, said module comprising:
- a rigid housing adapted to secure to a location of the vehicle to communicate an exterior with a passenger compartment interior;
- a flap hingedly secured along an inner edge to said housing and extending across an open interior of said housing, said flap further including side edges and an interconnecting outer edge spaced apart from said inner edge and sealing said open interior of said housing to prevent backflow of air from the exterior into the passenger compartment interior;
- a plurality of fingers projecting at spaced locations along at least said outer edge of said flap, an edge of each of said fingers abutting a surface of one of a plurality of standoff projections of said housing to establish a holding force;
- and
- said fingers each further including a bend axis which, in response to a positive air pressure condition created within the passenger compartment interior which overcomes the holding force exerted by said fingers against said stand-offs, causes said fingers to pivot and said flap to open in order to vent to the exterior the positive air pressure until reclosing upon the interior compartment achieving an air equilibrium condition with the exterior.