Internal combustion engine piston with laterally offset crudgeon

Details Internal combustion engine piston with laterally offset crudgeon Internal combustion engine piston with laterally offset crudgeon

1986-11-07

1989-03-14

Garrett, Robert E.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92190, 403150, 403155, F02F 300, F02F 316, F16J 116

Patent

active

048116548

ABSTRACT:
Piston for combustion engines consisting of an upper part forming the piston crown and a lower part forming the piston body. These two piston parts abut via annular contact surfaces in the piston axial direction and are coupled together via a gudgeon pin or a gudgeon pin bushing. In order to arrange such an unscrewed piston in such manner that its upper part need not be constructed to be rigid and heavy as in an articulated piston with pendulum shaft and that the construction of cooling channels between the upper and lower parts is possible without excessive expenditure and the constructional height of the piston can be small, the contact surfaces are mutually prestressed in the direction of the piston axis in that the gudgeon pin bore in the one piston part is arranged to be offset relative to the gudgeon pin bore in the other piston part in the unstressed condition in the direction of the piston axis. In this connection, the offset can amount to 0.5 to 10 parts per thousand of the piston diameter. By this offset according to the invention a substantially rigid inter-engaged and frictionally inter-locking coupling between the two piston parts is ensured.

REFERENCES:
patent: 1430010 (1922-09-01), Hartog
patent: 2221966 (1940-11-01), Elder
patent: 3476021 (1969-11-01), Williams
patent: 3526420 (1970-09-01), Brancaleone
patent: 3699636 (1972-10-01), Walker
patent: 3915141 (1975-10-01), Ottl et al.
patent: 4011797 (1977-03-01), Cornet
patent: 4214358 (1980-07-01), Clerc
patent: 4356800 (1982-11-01), Moebus

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