The piston which consists of, the multiple parts for the internal combustion engine of mannered null which produces the piston and the said piston which consist of

摘要

The piston which consists of, the plural parts for the internal combustion engine and is cooled (20) being, the piston upper amount which was forged from the steel (1) is provided, the said piston upper amount (1), combustion dent (3) and the ring part (11) the ring wall which it has had (4), the boss in order to accommodate the piston pin where piston lower part amount (2) is provided, the said piston lower part amount (2), the piston skirt (9) with, the piston (20) has connected to the connecting rod (12) with, the piston skirt (9) the boss support which is connected the piston of the type which it has possessed (6) (20) with, at the same time the piston of this kind of type (20) with the method of producing, as for cheap production and satisfactory form stability, the plural support ribs which were forged to the territory where it has extended the cooling passage which formed in piston upper amount (1) (7), the said cooling passage (7), facing toward combustion dent (3), (8) we have possessed, these support ribs (8), piston longitudinal direction axis (K) toward facing with radial respectively, the annular ring rib which has the composition plane (5) we to form division, piston lower part amount (2)Going round to ring condition, the support rib which is connected to boss support (6), has the composition plane (10) we have possessed, it is achieved by being connected to dissociation failure at the same time piston upper amount (1) and piston lower part amount (2), the ring rib (5) and the support rib (10) by the composition plane.