US Patent 7617897 Vehicle engine cooling system

A vehicle engine cooling system includes a cooling water circulation passage extending from an engine in an engine room and returning to the engine, at least a part of the cooling water circulation passage arranged to face a running wind flow space apart from the engine room. The cooling water circulation passage includes a forward cooling part disposed in a front portion of a vehicle body for receiving a running wind substantially perpendicularly includes a bent radiation pipe, and a floor-lower-face cooling part disposed on a lower face of a floor of the vehicle body for receiving the incoming wind includes a finned radiation pipe.