An improved internal combustion engine essentially consists of an engine that necessarily includes an intake duct (D) an intake valve (V) an air injector (I) and an exhaust valve (V1). The invention is characterised in that it comprises two basic versions of the same concept which is that of using a crankshaft (1) with three crankpins (2/11) for each cylinder (3). The crankpins (2) of the same cylinder (3) are offset at an angle in relation to each other allowing a main piston (4) and a central piston (5) to be actuated. The main chamber (4) is located between the main piston (4) and the central piston (5) while the central piston chamber (4) is located inside the central piston (5) and a central pre-chamber (4) is located in the cylinder.
An improved internal combustion engine essentially consists of an engine that necessarily includes an intake duct (D) an intake valve (V) an air injector (I) and an exhaust valve (V1). The invention is characterised in that it comprises two basic versions of the same concept which is that of using a crankshaft (1) with three crankpins (2/11) for each cylinder (3). The crankpins (2) of the same cylinder (3) are offset at an angle in relation to each other allowing a main piston (4) and a central piston (5) to be actuated. The main chamber (4) is located between the main piston (4) and the central piston (5) while the central piston chamber (4) is located inside the central piston (5) and a central pre-chamber (4) is located in the cylinder.