Piston with specific land characteristics

Details Piston with specific land characteristics Piston with specific land characteristics

1991-05-01

1992-05-19

Cross, E. Rollins

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

92233, 92216, F02F 300/3/22

Patent

active

051138174

ABSTRACT:
A piston for an internal combustion engine with a separate head and skirt which are joined by a piston pin. The ring belt extends downward from head and terminates above the pin. The space between the lower edge of the ring belt and a section of the head defines a cooling oil ring space. A depression is formed in the head and is partly defined by the section. The second land has the largest diameter and exclusively guides the piston. The height of the second land is in the range of three to seven percent of the piston diameter. The diametrical second land clearance is 1.5% to 2.5%. The diametrical third land clearance is one percent of the piston diameter. The diametrical top land clearance is in the range of 1.5 mm to 2.0 mm.

REFERENCES:
patent: 2601344 (1952-06-01), Townhill
patent: 3463057 (1969-08-01), Packard et al.
patent: 3805677 (1974-04-01), Clary et al.
patent: 4013057 (1977-03-01), Guenther
patent: 4831919 (1989-05-01), Bruni
patent: 4989559 (1991-02-01), Fletcher-Jones

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