Piston for spark-ignited direct fuel injection engine

Details Piston for spark-ignited direct fuel injection engine Piston for spark-ignited direct fuel injection engine

2005-05-17

2005-05-17

Huynh, Hai (Department: 3747)

Internal-combustion engines

Precombustion and main combustion chambers in series

Having combustible mixture forming means

C123S279000

Reexamination Certificate

active

06892693

ABSTRACT:
A piston for an internal combustion engine is disclosed. A bowl-shaped recess is constructed in the combustion face of the piston. The recess has a w-shaped cross-section. The w-shaped cross-section is unsymmetrical and has at least one side that is mostly vertical. The recess is positioned off-center in the face of the piston so that fuel that is injected into the cylinder is redirected by the recess toward a center space of the cylinder thereby improving combustion of fuel in the cylinder and preventing fuel from accumulating about a periphery of the combustion chamber.

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