| 摘要 |
The present invention is a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (10), a cylinder head (12) carrying fuel injection means (14), a piston (16) sliding in the cylinder, a combustion chamber (34) limited on one side by an upper face (44) of the piston comprising a projection (48) extending in the direction of the cylinder head and located in a centre of a concave bowl (46). The engine comprises injection means projecting fuel in at least two fuel jet sheets with different sheet angles (A1, A2), a lower sheet (36) of jet axis C1 and an upper sheet (38) of jet axis C2, and at least two mixing zones (Z1, Z2) of the combustion chamber. One of the zones comprises a toroidal volume (64) having center B with a flat bottom (56) into which fuel jets (40) of the lower sheet are injected so that axis C1 of the lower sheet jets is contained between center B and projection (48). |
