Thermal insulation is provided for the ignition area of the cylinders, for the exhaust piping, and until the turbo loader. By well-controlled ignition and multiple uses of the heat generated, the yield of the engine can be as high as 50 ÷ 60 %.

For the new engine type no camshafts, timing chain, liquid cooling and suction valves are needed. Combustion control is achieved by photo-diodes.

Application of the patented invention would generate a new revolution in engine manufacturing. A single engine type would be sufficient for all passenger cars, as the stroke volume can be varied between 500 ÷ 2100 cm³. For two-cycle engines the stroke volume can be as high as the equivalent of a four-cycle engine of 3600 cm³. Fuel is at a choice, petrol or diesel fuel can be equally used in the same engine, without structural modifications, just by using appropriated control programs (different fuel admission systems will be however needed). The piston of the engine can be used as well as an air compressor, in case of excess air also as an air working cylinder. The engine can be also constructed as a petrol-air hybrid power source. Used as an engine brake, all four cylinders act on the wheels, whereas two cylinders use the kinetic energy for filling up the compressed air tank. Driving uphill, the power of the turbo loaders is increased and extra fill of the air tanks results.

In city traffic, the consumption of the engine is at 3 litres/100 km, with a 60 ÷ 70% lower emission of pollutants (CO, NO_x), to be further improved by exhaust catalysts. During idle-running or cold start, the engine reduces the stroke volume to 500 cm³, at a fuel consumption of 1.03 litres/hour.

Surely, many buyers will prefer the cars equipped with this innovative engine, offering versatility, larger output at less fuel consumption, better acceleration and friendly to the environment. Massive use of the new engine will contribute to better conservation of the fossil fuel reserves.