Patent ID: 6182625
Filing Date: 2001-02-06
Classification: F01M

Abstract:
An oil-passage structure of an internal combustion engine including a cylinder block, a plurality of auxiliaries having pulleys associated therewith, a crankshaft provided with a crank pulley and a crank timing sprocket and supported on the cylinder block, a cylinder head positioned on the cylinder block, intake and exhaust camshafts supported by the cylinder head for opening and closing an intake valve and an exhaust valve respectively, cam sprockets respectively attached to the intake and exhaust camshafts, a timing chain wound around the crank timing sprocket and the cam sprockets, a chain cover extending over the cylinder block and the cylinder head so as to cover the timing chain, an auxiliaries driving belt wound around the pulleys associated with the auxiliaries and around the crank pulley, an oil pump to be driven by the crankshaft, an oil control valve for operating hydraulic equipment whereby oil from the oil pump is introduced to the oil control valve, and an external oil pipe connecting the oil pump and the oil control valve, the external oil pipe being positioned between the auxiliaries driving belt and the chain cover.