Patent ID: 6752108
Filing Date: 2004-06-22
Classification: F01L,F02B,F02M,Y10T

Abstract:
A four-cycle engine comprising an engine body, at least one cylinder, a piston reciprocatingly arranged in the cylinder, and a cylinder head assembly, a combustion chamber being defined between the cylinder head assembly, cylinder and piston, a port opening into the combustion chamber, a valve selectively opening and closing the port, a camshaft having a cam configured to actuate the valve, a variable valve timing mechanism configured to vary the valve timing of the valve by varying an angular position of the camshaft, a fluid pump adapted to provide fluid under pressure to a control valve, the control valve being configured to selectively supply fluid to the variable valve timing mechanism so as to control the angular position of the camshaft, and an engine lubrication system having an oil reservoir and an oil pump, the oil pump drawing oil from the oil reservoir, and the fluid pump and oil pump operate substantially independently from one another.