Piston for an internal combustion engine
AssigneeMahle International GmbH
InventorsRalf BRAIG, Rainer FISCHER, Peter KEMNITZ, Peter KLEINLE
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine has a piston crown, a circumferential top land, and a circumferential ring belt having ring grooves, as well as having a piston skirt that has two skirt walls disposed on the major thrust side and the minor thrust side of the piston, and two box walls, set back with regard to the ring belt, that connect the skirt walls. The box walls have pin bosses with pin bores. The skirt wall disposed on the major thrust side is shorter, in a circumference direction of the piston, than the skirt wall disposed on the minor thrust side.
Claims15
A piston for an internal combustion engine, comprising:
- a piston crown having a top land and a circumferential ring belt having ring grooves;
- a piston skirt that has two skirt walls disposed one each on a major thrust side (DS) and a minor thrust side (GDS) of the piston, and two box walls that connect the skirt walls and which are set back with respect to the ring belt;
- wherein the box walls are provided with pin bosses having pin bores, and
- wherein the skirt wall disposed on the major thrust side (DS) is shorter, in a circumference direction of the piston, than the skirt wall disposed on the minor thrust side (GDS),
- wherein a distance between the box wall sections that connect the pin bosses with the skirt wall disposed on the minor thrust side (GDS) is less in a region of the pin bosses than in a region of the skirt wall,
- wherein a distance between those box wall sections that connect the pin bosses with the skirt wall disposed on the major thrust side (DS) is equal to or greater in a region of the pin bosses than in a region of the skirt wall, and
- wherein the box walls enclosed an acute angle (α) in a direction of their connection to an underside of the piston crown.
Dependencies are inferred from the claim text.