Piston for an internal combustion engine
AssigneeUnisia Jecs Corporation
InventorsEiji Okamura, Seiichi Sue, Hidehiko Koyashiki, Kazumitsu Kobayashi
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Abstract
A piston for an internal combustion engine is provided which has at a top surface thereof a cavity for causing a mixture charge drawn from an intake port into a combustion chamber so as to flow with a rotational motion about a horizontal axis to flow toward a spark plug. A combustion chamber structure for an internal combustion engine is also provided.
Claims20
A piston for an internal combustion engine having a cylinder, a cylinder head closing an end of the cylinder and having an inner surface defining a combustion chamber, a spark plug mounted on the cylinder head, an intake valve mounted on the cylinder head on one of opposite sides of the spark plug and an exhaust valve mounted on the cylinder head on the other of the opposite sides of the spark plug, the piston being reciprocatingly disposed in the cylinder and having at the top surface a cavity for causing a mixture charge drawn into the combustion chamber so as to flow with a rotational motion about a horizontal axis upon opening of the intake valve to flow toward the spark plug.
A piston for an internal combustion engine having a cylinder, a cylinder head closing an end of the cylinder and having an inner surface defining a combustion chamber, a spark plug mounted on the cylinder head, an intake valve mounted on the cylinder head on one of opposite sides of the spark plug and an exhaust valve mounted on the cylinder head on the other of the opposite sides of the spark plug, the piston being reciprocatingly disposed in the cylinder and having at the top surface a cavity that causes a mixture charge drawn into the combustion chamber so as to flow with a rotational motion about a horizontal axis upon opening of the intake valve to flow upward from a place adjacent a center of the top surface of the piston and toward the spark plug.
A combustion chamber structure for an internal combustion engine comprising:
- a cylinder block having a cylinder;
- a cylinder head closing an end of the cylinder and having an inner surface defining a pentroof-shaped combustion chamber;
- the inner surface of the cylinder head having a pair of inclined surface sections;
- at least one intake port formed in one of the inclined surface sections of the cylinder head;
- a mixture charge drawn from the intake port into the combustion chamber being made to flow with a rotational motion about a horizontal axis;
- at least one exhaust port formed in the other of the inclined surface sections of the cylinder head;
- a spark plug disposed between the inclined surface sections of the cylinder head;
- and
- a piston reciprocatingly disposed in the cylinder and having at a top surface thereof a cavity for causing the mixture charge drawn into the combustion chamber to flow toward the spark plug.
Dependencies are inferred from the claim text.