The guide hood, also known as the air guide plate, can improve the car's air performance, is an important measure to improve the production efficiency of the car, reduce fuel consumption, improve performance. For the windward area, high speed, the overall linear difference of the car train, van semi trailer and other special vehicles, it is particularly important. Therefore, most of the special vehicles and trains used on the expressway are equipped with a diversion hood.
It is a hard shell cover, mounted on the roof of the traction car cab, refrigerated car guide hood is generally made of thin steel plate, but also useful FRP paste system. There are two kinds of guide hood: fixed type and adjustable type. After the fixed guide hood is installed on the roof of the cab, its elevation Angle is immutable. The adjustable guide hood has an elevation adjustment bar, which can adapt to different cargo height or carriage height by adjusting the elevation of the guide hood, so as to obtain smaller air resistance.