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A piston having an offset piston bowl for use in an engine having a correspondingly offset fuel injector, wherein the piston bowl has a non-circular or non-annular shape. The non-annular bowl shape is contoured to permit increased spray plume length, avoiding impingement. The bowl is especially usef

A piston having an offset piston bowl for use in an engine having a correspondingly offset fuel injector, wherein the piston bowl has a non-circular or non-annular shape. The non-annular bowl shape is contoured to permit increased spray plume length, avoiding impingement. The bowl is especially useful in a diesel engine having two-valves per cylinder, wherein the injector must be mounted in an offset location because a central region of the cylinder head is occupied by two proximal valve ports. The bowl has a raised inner portion surrounded by a concave outer portion. A peak or apex of the raised inner portion is located closer to a peripheral wall of the concave outer portion at a "short" side of the bowl than at a "long" side of the bowl.

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[ What is claimed is:] [1.] A piston for an internal combustion engine, the piston having a generally cylindrical body with a piston head formed at an end thereof, a surface of the piston head forming a piston bowl which is offset from a central axis of the piston, wherein an outer portion of the bo

[ What is claimed is:] [1.] A piston for an internal combustion engine, the piston having a generally cylindrical body with a piston head formed at an end thereof, a surface of the piston head forming a piston bowl which is offset from a central axis of the piston, wherein an outer portion of the bowl includes an outer peripheral wall defining an outer edge of the bowl, the peripheral wall being generally egg-shaped.