Patent ID: 6269790
Filing Date: 2001-08-07
Classification: F02B,Y02T

Abstract:
An in-cylinder injection internal combustion engine having a cylinder bore, a cylinder head, a piston positioned in said cylinder bore, and a combustion chamber formed by a cylinder head lower wall and a top wall of the piston, said engine comprising:at least one intake port on a first side of said cylinder head lower wall;at least one exhaust port on a second side of said cylinder head lower wall;an air intake port communicating with said intake valve and said cylinder head lower wall to provide a tumble flow of inducted air in said combustion chamber;a spark plug positioned in said cylinder head lower wall between said intake port and said exhaust port;a combustion bowl positioned in the top wall of the piston, said combustion bowl having a substantially spherical configuration with a majority of the area thereof is positioned in vertical alignment with said second side of said cylinder head lower wall and adjacent the exhaust port; anda fuel injector for directly injecting fuel into said combustion chamber, said fuel injector positioned on said first side of said cylinder head lower wall adjacent said intake port and oriented to direct a fuel spray toward said combustion bowl;said cylinder bore having a first vertical axis and said combustion bowl having a second vertical axis, said second vertical axis being positioned 5 to 15 millimeters offset from said first vertical axis in the direction of said exhaust port; and said tumble flow of air is directed against the direction of the fuel spray from said fuel injector during at least a portion of the combustion cycle of the piston in the cylinder bore.