Patent ID: 6591819
Filing Date: 2003-07-15
Classification: F01B,F01L,F01M,F01N,F01P,F02B,F02F,F02M,F05C,F16H,Y02T

Abstract:
A four stroke internal combustion engine comprising:a crankcase; a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one cylinder, wherein the crankcase includes at least one crank chamber located below the cylinder; a crankshaft rotatably mounted within the crankcase, wherein the crankshaft extends through the at least one crank chamber; at least one intake valve for the at least one cylinder; at least one exhaust valve for the of the at least one cylinder; a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve; a dry sump lubrication system; and a lubrication tank integrally formed in the crankcase, wherein the crank chamber includes a lubrication drainage aperture formed in a lower portion thereof, wherein lubricant and blow-by gas exits the crank chamber through the lubrication drainage aperture into an upper portion of the lubrication tank.