Patent ID: 8220432
Filing Date: 2012-07-17
Classification: F02F

Abstract:
1. An internal combustion engine piston comprising: a piston crown defining a combustion chamber; a thrust-side skirt formed integrally with the piston crown, and adapted to be in sliding contact with a cylinder wall, the thrust-side skirt having an arc-shaped cross-section; an anti-thrust-side skirt formed integrally with the piston crown, and adapted to be in sliding contact with the cylinder wall, the anti-thrust-side skirt having an arc-shaped cross-section; a first apron formed with a first piston pin boss; a second apron formed with a second piston pin boss, the first and second aprons having a substantially constant thickness in a direction from top to bottom; a first connecting section connecting the first apron to a first circumferential end of the thrust-side skirt; a second connecting section connecting the second apron to a second circumferential end of the thrust-side skirt; a third connecting section connecting the first apron to a first circumferential end of the anti-thrust-side skirt; and a fourth connecting section connecting the second apron to a second circumferential end of the anti-thrust-side skirt, wherein each of the first, second, third and fourth connecting sections has a thickness that gradually increases as followed from a proximal longitudinal end to a distal longitudinal end, wherein the proximal longitudinal end is closer to the piston crown, and the distal longitudinal end is closer to a distal longitudinal end of a corresponding one of the thrust-side and anti-thrust-side skirts.