Piston for Internal Combustion Engine and Internal Combustion Engine with the Same
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsJun Matsui, Kenji Hayama
Life of this patent
Estimating the term…
Abstract
A piston (10) for an internal combustion engine including: a piston head (11) located at an uppermost section of the piston; a land (12) located on a circumference of the piston head (11); a skirt (13) located below the land (12); and a pair of pin bosses (14) located on the lower section of the piston head (11). The piston head (11) has a first cavity (24) on the bottom of the piston bead (11). Each of the pair of pin bosses (14) has a second cavity (20) in an outer upper section of the pin boss (14). The pin boss (14) has a through hole (21) that communicably connects the first cavity (24) with the second cavity (20).
Claims8
1-8. (canceled)
A piston for an internal combustion engine comprising:
- a piston head located at an uppermost section of the piston, having a first cavity on the bottom of the piston head;
- a land located around a circumference of the piston head;
- a skirt located below the land;
- and
- a pair of pin bosses located on the lower section of the head, in which a second cavity is formed in an outer upper section of the pin boss,
- wherein each pin boss has a through hole formed on an upper section of the pin boss that communicably connects the first cavity with the second cavity, and wherein the land is provided with an oil return hole that communicates with the second cavity, and the through hole is provided on a common axis with the oil return hole.
An internal combustion engine comprising:
- a piston for an internal combustion engine comprising:
- a piston head located at an uppermost section of the piston, having a first cavity on the bottom of the piston head;
- a land located around a circumference of the piston head;
- a skirt located below the land;
- and
- a pair of pin bosses located on the lower section of the head, in which a second cavity is formed in an outer upper section of the pin boss,
- wherein each pin boss has a through hole formed on an upper section of the pin boss that communicably connects the first cavity with the second cavity, and wherein the land is provided with an oil return hole that communicates with the second cavity, and the through hole is provided on a common axis with the oil return hole;
- and
- an oil spraying device that sprays oil toward the undersurface of the piston head of the piston.
Dependencies are inferred from the claim text.