Fuel-injected internal combustion engine with reduced squish factor
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United States of America Patent
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Nov 18, 2003
Issued Date -
N/A
app pub date -
May 2, 2002
filing date -
May 10, 2000
priority date (Note) -
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Abstract
A direct fuel injection internal combustion engine configured to reduce engine knock during high speed operation of the engine is provided. The engine comprises a cylinder head including a lower surface portion closing an upper end of a cylinder to define a combustion chamber between a piston upper surface and the cylinder head lower surface portion. The lower surface portion has therein an upwardly extending recess. The recess has a lower end which is complementary with the piston surface and an upper end. The lower end of said recess has an area in a plane perpendicular to a longitudinal axis of the cylinder and that area comprises a range from more than 20% to about 65% of the cross-sectional area of the cylinder.
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