Piston for internal combustion engine

Details Piston for internal combustion engine Piston for internal combustion engine

1990-09-11

1992-04-28

Cross, E. Rollins

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

92233, F16J 104, F02F 100

Patent

active

051078074

ABSTRACT:
A piston for an internal combustion engine comprises a skirt portion formed with a piston pin hole. The skirt portion includes in an axial direction of the piston a first portion upper than an axis of the piston pin hole, and a second portion lower than the axis thereof. The first portion has a first cross section formed in accordance with a first ellipse, and the second portion has a second cross section formed in accordance with a second ellipse. The first and second ellipses have two foci, respectively, on a center plane of the piston which is perpendicular to the axis of the piston pin hole. The first ellipse is smaller in ellipticity than the second ellipse. The skirt portion including a ramp portion connecting the first portion to the second portion.

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patent: 4809652 (1989-03-01), Essig et al.
patent: 4831919 (1989-05-01), Bruni
patent: 4856417 (1989-08-01), Ishikawa
patent: 5058489 (1991-10-01), Iwaya

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