Valve ignition prechamber with a reversed directon of combustion

A valve ignition prechamber (1) with a reversed direction of combustion for an internal combustion engine (2) which has a cylinder head (3) which covers a cylinder (4) to form a combustion chamber (5) in which can be burned a main charge (30), characterized in that it comprises:

• At least one lamination cavity (6) which is arranged in the cylinder head (3) and which is connected to the combustion chamber (5) by a lamination duct (7);
• A pilot charge injector (32) which opens into the lamination cavity (6) to inject therein a pilot charge (9) consisting of an easily flammable Combustive agent-AF fuel mixture;
• A lamination valve (13) which can either close the lamination duct (7) so that the latter no longer communicates with the combustion chamber (5), or open said duct (7) to form with the latter a torch-ignition prechamber (23) which simultaneously communicates, on the one hand, with the lamination cavity (6) via the lamination duct (7) and, on the other hand, with the combustion chamber (5) via at least one gas ejection orifice (24) to emit an ignition torch (29) into said chamber (5);
• At least one inverter housing (93) housed in the lamination cavity (6), said housing (93) forming between itself and said cavity (6) a late combustion volume (100) while an ignition pilot charge (27) can be introduced into said housing (93);
• Ignition means (11) that open inside the inverter housing (93) to ignite the ignition charge (27);
• At least one main ejection nozzle (94) which connects the inside of the inverter housing (93) with the inside of the lamination cavity (6), said nozzle (94) producing during the combustion of the ignition pilot charge (27) a pre-ignition torch (33) which can penetrate in whole or in part into the lamination duct (7), the volume swept by said torch (33) constituting an early combustion volume (101).