Prechamber combustion system
OwnerJose Francisco Regueiroinventor
Life of this patent
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Abstract
An improved combustion system particularly for a larger type diesel engine featuring a prechamber with a generally cup-shaped bottom tip portion facing the engine's main combustion chamber and with a central transfer passage substantially aligned with the centerline of the prechamber and a plurality of additional transfer passages circumferentially arranged about the centerline of the prechamber. The improved complete combustion system uses a piston with a deep bowl formed in the piston crown into which the central transfer passage directs a strong direct charge of products of combustion from the prechamber.
Claims33
In an internal combustion engine having a cylinder and a piston movably disposed in said cylinder for reciprocal motion, a cylinder head secured over said cylinder and piston to form a combustion chamber, at least one intake port extending in said cylinder head and at least two intake valves mounted in said cylinder head for allowing air to be admitted into said combustion chamber, at least one exhaust port extending through said cylinder head and at least one exhaust valve mounted to said cylinder head for allowing exhaust gases to exit said combustion chamber, and a precombustion chamber housing an injector, the improved combustion system characterized by:
- said pre-combustion chamber having a plurality of transfer passages communicating with said combustion chamber;
- said transfer passages being circumferentially spaced about a centerline of said pre-combustion chamber;
- said centerline of said transfer passages being angularly inclined in two different planes about said centerline of said pre-chamber to provide rotation of air entering said prechamber about its centerline;
- said centerline of said pre-combustion chamber being approximately aligned with a centerline of said combustion chamber;
- said prechamber having its bottom tip facing said combustion chamber formed as a cup protruding into said combustion chamber;
- said piston has a deep central bowl, and a pair of open cavities separating the outside walls of said bowl from the interior walls of the piston skirt;
- said cavities being exposed to the crankcase of said engine block.
A pre-combustion chamber for an internal combustion engine characterized by:
- a housing having an interior forming said pre-combustion chamber, with one opening to fit a fuel injector;
- said housing being formed in a conical shape;
- the tip of said housing of said pre-combustion chamber being formed as a cup which connects directly with said conical shape of said pre-combustion chamber housing;
- said tip of said housing protrudes into said main chamber;
- a plurality of passages through said tip for communicating said pre-combustion chamber volume with a main chamber of said cylinder;
- said passages being circumferentially spaced about a centerline of said pre-combustion chamber and having their axis inclined in two planes with respect to said centerline.
A piston for an internal combustion engine characterized by:
- said piston being formed with a deep centrally located combustion bowl;
- the outer walls of said combustion bowl being radially-spaced in at least two sections from the inner walls of the skirts of said piston, forming two deep cavities on the underside of said crown of said piston which are exposed to the engine crankcase.
A pre-combustion chamber for an internal combustion engine characterized by:
- a housing having an interior forming said pre-combustion chamber, with an opening to fit a fuel injector;
- the tip of said housing of said pre-combustion chamber being formed as a cup which connects directly with said interior volume of said precombustion chamber housing;
- said tip of said housing protrudes into said main chamber;
- a plurality of passages through said tip for communication said precombustion chamber volume with a main chamber of said cylinder;
- said passages being circumferentially spaced about a centerline of said pre-combustion chamber and having their axis inclined in two planes with respect to said centerline.
Dependencies are inferred from the claim text.