| 摘要 |
FIELD: engines and pumps.SUBSTANCE: piston (3) for an internal combustion engine, and namely for a diesel engine, which includes a housing restricted on the lateral side with skirt (31) provided with possibility of interaction with walls of cylinder (1) with rotation axis C, in which piston (3) can be moved by sliding along that axis C; the above piston (3) includes front side (32) that includes central bulge (321), peripheral crown (322) and bowl (323) with rotation axis B, which is made from central bulge (321) in the direction of peripheral crown (322), with which it is adjacent at the level of edge (3220) with thickness Ep; the above bowl (323) includes toroid (3230) under edge (3220), which preferably has a profile made in the form of a spherical arch with maximum radius Rt, which has the possibility of directing the sprayed fuel under edge (3220) at the level of a zone of reverse rotation R towards central bulge (321); bulge located on rotation axis B of bowl (323) is arranged at the height that is less by distance Dt under level of a peripheral rim, which comprises 5,4 to 8 mm; difference of distances of the end of crown De/2 and end of the toroid Dp/2 relative to rotation axis B of bowl (323) is equal to 2 mm.EFFECT: reduction of nitrogen oxide emissions and particles in exhaust gases.2 cl, 2 dwg |
