The various embodiments herein provide a dual internal combustion engine comprising a cylindrical body and a piston provided in the cylindrical body. The piston includes a double acting piston head connected to a piston rod at one end and the double acting piston head divides the cylindrical body into a first combustion chamber and a second combustion chamber. The other end of the piston rod is connected to a crankshaft through the second combustion chamber. The dual internal combustion engine further includes a plurality of lubrication nozzles on the cylindrical body wall to lubricate the combustion chambers and the piston and pluralities of sealing rings along the piston rod at the second combustion chamber. The combustion in the first combustion chamber takes place above the double acting piston head and the combustion in the second combustion chamber takes place below the double acting piston head.
