Piston for internal combustion engines

Abstract

Abstract 1,069,609. Welding by fusion; making pistons. H. HAHLE, and E. MAHLE, [trading as MAHLE KOMM. GES.]. Nov. 5, 1965 [Nov. 25, 1964], No. 46991/65. Headings B3A and B3R. In an I.C. engine piston having in the region of the ring zone an annular cavity 3 formed between a part of the piston head 1 of reduced diameter and a sleeve 2, the mating annular surfaces of the sleeve 2 and the piston head 1 are welded by a beam of charge carriers and the piston head and/or the sleeve comprise parts 11 protruding beyond the depth of penetration of the beam and being so thin-walled in the region between maximum and minimum penetration that no significant stress can occur in them. The protruding parts 11 may be formed only on the piston head 1 and project over a shoulder 22 on the sleeve 2. The joint between the end face of the sleeve 2 and the piston head 1 is sealed by a synthetic plastic ring 9. In a modification, the protruding parts (11, 21, Fig. 1, not shown), are formed on the sleeve 2 and the piston head 1 and the end face of the sleeve 2 is welded by a beam of charge carriers. The piston may be of light metal. The sleeve 2 has a lower coefficient of expansion than the piston head 1.

Inventors

No inventors recorded.

Bibliographic Details