The invention relates to an air-powered engine 
assembly, which comprises an air tank, an air valve, an air 
distributor, an intake 
pipe, camshafts, an intake duct, an exhaust control device, air cylinders, pistons, crankshafts, couplers, clutches, automatic gearboxes and differentials connected with the outside. The 
assembly is characterized in that the air valve, a 
constant pressure chamber and a 
pressure controller are arranged between the air tank and the air 
distributor; the air 
distributor is connected with a plurality of air cylinders on an air cylinder 
gasket; each air cylinder is connected with an exhaust chamber through an 
exhaust manifold; the exhaust chamber is provided with a 
turbine generator which is connected with a storage batter; the air cylinders are provided with the camshafts for controlling the air intake and exhaust of the air cylinders; the air cylinders are provided inside with the pistons for driving the crankshafts to rotate; the camshafts and the crankshafts are connected by chains; and the crankshafts are connected with the differentials through the couplers, the clutches and the gearboxes in turn. Therefore, doing work through 
air compression rather than fuel, the air-powered engine 
assembly has the advantages of avoiding 
waste gas discharge and 
air pollution, along with reliable operation, convenient operation, economical efficiency, practicality and so on. In addition, due to recycle of the 
waste gas for power generation, the air-powered engine assembly saves energy and reduces costs.