Multi-part plunger piston for internal combustion engines

Details Multi-part plunger piston for internal combustion engines Multi-part plunger piston for internal combustion engines

1985-06-18

1986-08-05

Garrett, Robert E.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92220, 92255, 29526R, F02F 302

Patent

active

046036172

ABSTRACT:
A multi-part plunger piston for internal combustion engines, comprises a piston upper part and lower part which engage one on the other through coinciding annular abutment surfaces. The parts are connected with one another by screws which pass through the annular surfaces. At least one of the annular abutment surfaces is domed in the circumferential direction in such a way that the annular surfaces are more strongly resiliently braced in the region between the screws in the finally assembled piston than in the regions around the screws. Due to the elastic initial stressing of the regions of the annular abutment surfaces between the screws it is intended reliably to avoid lifting away of the annular abutment surfaces in these regions during engine operation. When the finally assembled piston is in the cold condition the annular surfaces lie uniformly against one another over the entire circumference, admittedly with locally differing initial stresses.

REFERENCES:
patent: 3029112 (1962-04-01), Boyle
patent: 3960048 (1976-06-01), Wagner
patent: 4356800 (1982-11-01), Moebus

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