Asymmetric piston
AssigneeMahle International GmbH
InventorsLuiz Perrone, Kenneth L. Wirkkala, II, Iosif Muscas
Life of this patent
Estimating the term…
Abstract
Exemplary pistons and methods of making the same are disclosed. An exemplary piston may include a crown defining a combustion bowl and a ring land extending circumferentially around the combustion bowl. Exemplary pistons may further include a skirt supporting the crown. The skirt may include a pair of pin bosses defining a pin bore configured to receive a piston pin, and two opposing skirt supports defining surfaces configured to slide along a cylinder bore surface. The skirt supports each define a different radial stiffness.
Claims20
A piston, comprising:
- a crown defining a combustion bowl and a ring land extending circumferentially around the combustion bowl, the crown defining at least in part a cooling gallery extending circumferentially about the piston;
- and
- a skirt supporting the crown, the skirt including a pair of pin bosses, the pin bosses each defining a pin bore configured to receive a piston pin along a pin bore axis extending between the pin bosses, the skirt including two opposing skirt supports defining surfaces configured to slide along a cylinder bore surface, wherein a first one of the skirt supports defines an opening extending parallel to the pin bore axis such that the first one of the skirt supports defines a radial stiffness different from a second one of the skirt supports.
A method of making a piston, comprising:
- forming a crown defining a combustion bowl and a ring land extending circumferentially around the combustion bowl;
- and
- providing a skirt supporting the crown, the skirt including a pair of pin bosses, the pin bosses each defining a pin bore configured to receive a piston pin, the skirt including two opposing skirt supports defining surfaces configured to slide along a cylinder bore surface;
- and
- establishing a first one of the skirt supports as defining an opening extending parallel to the pin bore axis such that a radial stiffness of the first skirt support is different from a radial stiffness of the second one of the skirt supports.
Dependencies are inferred from the claim text.