Universal combustion system

An improved premix and precombustion module for positive-displacement thermal engine having a main combustion chamber and compression means for generating compressed air in the main combustion chamber, the improved premix and precombustion module comprising:

• a main body with connection means for connecting the premix and precombustion module to the thermal engine, the main body having an internal premix chamber with a discharge port in communication with the main combustion chamber when the premix and precombustion module is connected to the thermal engine;
• a central piston valve displaceable in the main body, the central piston valve having a valve head and the discharge port having a valve seat, wherein the head seats on the valve seat and blocks communication of the premix chamber with the main chamber when the piston valve is displaced toward the discharge port;
• actuating means connected to the central piston valve for selectively displacing the valve head into seating engagement with the valve seat wherein the discharge port is closed, and for retracting the valve head from a seating engagement with the valve seat wherein the discharge port is open and the premix chamber communicates with the main combustion chamber;
• air passage means between the main combustion chamber and the premix chamber having a passage and a check valve means in the passage for automatic passing of compressed air in the main combustion chamber to the premix chamber when pressure of compressed air exceeds pressure in the premix chamber, the check valve means blocking the passage from the premix chamber to the main combustion chamber when pressure in the premix chamber exceeds the pressure in the main combustion chamber;
• and,
• controlled fuel delivery means for timed delivery of fuel under pressure to the air passage means.