Piston for an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorNoriyuki Tokoro
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine including a crown, a skirt and bosses. The skirt has a circumferentially extending faucet rib in a lower portion of the skirt and reinforcing ribs which extend in a thrust and thrust-opposing direction of the piston from the bosses straight to the faucet rib. Reinforcing ribs increase the rigidity of piston in the thrust and thrust-opposing direction and suppress parmanent deformation of the skirt in the thrust and thrust-opposing direction, resulting in decreasing slapping sounds in a piston and cylinder structure without sticking of a piston with a cylinder bore.
Claims9
A piston for an internal combustion engine comprising:
- a crown having a circumferentially extending oil-ring groove in an outer portion of the crown, the oil-ring groove having slits on thrust and thrust-opposing sides of the piston;
- a skirt integrally connected to the crown and extending downward, the skirt having a circumferentially extending faucet rib on an inside surface of a lower portion of the skirt;
- a pair of opposed bosses protruding inward from an inside surface of the piston and extending in a direction perpendicular with a thrust and thrust-opposing direction of the piston, the bosses being opposed to each other;
- and
- reinforcing ribs formed on the inside surface of the piston and protruding inward from the inside surface of the piston, the reinforcing ribs extending straight in a plane extending in the thrust and thrust-opposing direction of the piston from the faucet rib to the bosses, each reinforcing rib being integrally connected to the faucet rib and to a boss.
Dependencies are inferred from the claim text.