Patent ID: 7243634

Claim:
An internal combustion engine with at least one engine member, the engine member including: a combustion chamber of a combustible mixture with fuel and oxidant components fitted with a compression system, an ignition system of the combustible mixture by an igniter, sequential let-through devices for the fuel and oxidant components and for the combustion products, the engine being of the supercharging type by boost pressure of the oxidant components upstream of the engine member, wherein the fuel is exclusively liquid, and the ignition system includes a closed head substantially spherical with a wall enclosing the igniter in a precombustion chamber, the head including a set of orifices intended to communicate the combustion chamber and the precombustion chamber so that combustible mixture may flow into the precombustion chamber, wherein at least one orifice has dimensions of passageway not letting through a flame front from the precombustion chamber to the combustion chamber while letting through unstable species resulting from the combustion in the precombustion chamber in order to enable self-ignition of the combustible mixture of the combustion chamber.