Patent ID: 7497287

Claim:
A cooling system for a vehicle, comprising: a radiator for radiating heat; a ventilation duct extending from a rear surface of the radiator to a vehicle rear side, the ventilation duct having an outlet for discharging air having passed through the radiator to an exterior; a blower disposed downstream of the radiator in an airflow direction; wherein the ventilation duct has a wall connected to an edge portion defining the outlet; the wall is disposed to intersect with a vehicle front-rear direction; the edge portion has a front end and a rear end in the vehicle front-rear direction, which are offset from each other in a vertical direction such that an opening direction of the outlet leans to a vehicle rear side from the vertical direction; the ventilation duct has a communication hole at a position upstream from the blower in the air flow direction and downstream from the radiator in the air flow direction; and an interior of the ventilation duct communicates with an exterior of the ventilation duct through the communication hole, the communication hole being provided to directly discharge air flow from the ventilation duct after the air flow passes through the radiator and before the air flow reaches the blower independently from the outlet of the ventilation duct; the cooling system further comprising; an air pressure responsive valve disposed within the ventilation duct to open and close the communication hole.