Piston for internal combustion engines
AssigneeNissan Motor Co., Ltd.
InventorsAkira Inoue, Nobuhisa Jingu
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine, including a piston crown having a central axis, and a piston bowl disposed in the piston crown, on which two tumble flows of air are provided. The piston bowl has a generally V-shaped contour in section taken along a vertical plane intersecting the tumble flows, on which the two tumble flows are retained at an inclined state toward a central axis of the piston crown.
Claims18
A piston for an internal combustion engine, comprising:
- a piston crown having a central axis;
- and
- a piston bowl disposed in the piston crown, on which two tumble flows of air are provided,
- the piston bowl having a contour in section taken along a vertical plane intersecting the tumble flows, the contour including an inclined portion inclined toward the central axis of the piston crown, the two tumble flows being disposed at the inclined portion.
A piston for an internal combustion engine, comprising:
- a piston crown having a central axis;
- and
- a piston bowl disposed in the piston crown, on which two tumble flows of air are provided,
- the piston bowl including a bottom wall and opposed and inclined side walls connected with the bottom wall, the side walls being opposed to each other and inclined toward the central axis of the piston crown.
A piston for an internal combustion engine, comprising:
- a piston crown including an intake side and an exhaust side;
- and
- a piston bowl disposed in the piston crown, the piston bowl having a generally V-shaped section taken along a vertical plane perpendicular to a direction extending from the intake side of the piston crown toward the exhaust side thereof.
An internal combustion engine, comprising:
- a cylinder chamber;
- a cylinder head enclosing the cylinder chamber;
- a piston within the cylinder chamber, the piston cooperating with the cylinder chamber and the cylinder head to form a combustion chamber;
- at least two intake ports in the cylinder head, communicating with the combustion chamber to introduce air into the combustion chamber;
- at least two exhaust ports in the cylinder head, communicating with the combustion chamber;
- an intake air control valve in each of the at least two intake ports, operative to deflect the air and create two tumble flows of the air in the combustion chamber;
- a fuel injector in the cylinder head, operative to directly inject fuel into the combustion chamber;
- a spark plug in the cylinder head, operative to ignite an air-fuel mixture in the combustion chamber;
- wherein the piston includes:
- a piston crown having a central axis;
- and
- a piston bowl disposed in the piston crown, on which the two tumble flows of air are provided,
- the piston bowl having a contour in section taken along a vertical plane intersecting the tumble flows, the contour including an inclined portion inclined toward the central axis of the piston crown, the two tumble flows being disposed at the inclined portion.
Dependencies are inferred from the claim text.