Non-annular piston bowl for two-valve engines using offset injec

Details Non-annular piston bowl for two-valve engines using offset injec Non-annular piston bowl for two-valve engines using offset injec

1997-11-18

1999-10-26

Moulis, Thomas N.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having combustible mixture forming means

123279, F02B 2308

Patent

active

059709464

ABSTRACT:
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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