| 摘要 |
The piston (100) has a crown (101) forming a piston bowl (102). The piston bowl (102) has a center portion (106) with a convex spherical shape, a floor (108) having a convex frusto-conical shape adjacent the center portion, and a base (110) having a concave toroidal shape surrounding the floor. The piston bowl (102) also has a cylindrical wall (112) extending tangentially from the base (110) that surrounds the center portion (106). The piston (100) has a top surface (114) perpendicular to the cylindrical wall (112) along a rim (115) of the piston bowl (102). A ratio between the piston bowl depth and the cylindrical wall length is less than 4, and a ratio between the piston bowl diameter and the piston bowl depth is 4.7. |
