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US 4,733,643 AGranted
Combustion chamber arrangement for an internal combustion engine
AssigneeIsuzu Motors Limited
InventorShiro Ishida
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AssigneeIsuzu Motors Limited
InventorShiro Ishida
Estimating the term…
The invention provides a combustion chamber arrangement for an internal combustion engine which can attain stabilized firing performance and stabilized combustion performance during any load running of the engine. The combustion chamber arrangement includes a piston having a combustion chamber formed by recessing a top portion thereof along an axial direction, and a recessed portion formed by recessing a portion of a peripheral wall of the combustion chamber along the direction of the depth of the piston in a radially outward direction, whereby partially a rich mixture is produced within the recessed portion in order to improve the firing performance while mixture of a suitable concentration is dispersed and distributed within the combustion chamber so that the flame produced within the recessed portion may be propagated to the mixture within the combustion chamber.
A combustion chamber arrangement for an internal combustion engine employing fuel having high volatility and a low centane number, comprising a piston having a combustion chamber therein and defined by a primary recess in a top portion thereof extending along an axial direction, said piston further having a semispherically recessed portion defined by a secondary recess in a portion of a peripheral wall of said combustion chamber in a direction along the depth of said piston in a radially outward direction, fuel injection nozzle means for only supplying said fuel into said secondary recess under light engine load conditions and for supplying said fuel into both said primary and secondary recesses under heavy engine load conditions, said fuel injection nozzle means being located close to said secondary recess, and spark plug means located within said secondary recess for promoting firing of the supplied fuel.
Dependencies are inferred from the claim text.