Abrégé

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for internal combustion engines and in particularly for diesel engines having prechamber combustion systems. In one embodiment, a combustion system (10) can be provided with a pre-chamber (14) adapted to cooperate with a piston (12) in a manner that produces a highly efficient combustion process. In some embodiments, the pre-chamber (14) has passages (26,55) that have a variable cross-section and a variable angular orientation with respect to a centerline (LA3) of the pre-chamber body (14). In one embodiment, the piston (12) is provided with a number of surfaces that facilitate the flow of fuel and air within the combustion chamber (134). In some embodiments, the piston surfaces are generally aligned with angles of the combustion chamber (134) such as the angle of the intake and exhaust valves (16,18). In other embodiments the piston (12) has surfaces that are adapted to cooperate with a tip (24) of the prechamber (14).

Classes IPC  ?

• F02B 19/14 - Moteurs caractérisés par des chambres de précombustion avec allumage par compression
• F02B 19/18 - Passages pour le transfert entre chambre et cylindre
• F02B 23/04 - Autres moteurs caractérisés par des chambres de combustion d'une forme ou d'une structure particulières pour améliorer le fonctionnement avec allumage par compression l’espace de combustion étant subdivisé en plusieurs chambres