Patent ID: 6276323
Filing Date: 2001-08-21
Classification: F01L,F02B

Abstract:
A valve drive mechanism for a DOHC engine, the engine having at least one cylinder, with two intake valves and two exhaust valves being provided for each cylinder, a functional part being located at a central portion of each cylinder bore, comprising:an intake camshaft having a pair of intake cams for each cylinder, the intake cams of each pair having center lines offset from centers of associated intake valves towards an outside direction of the cylinder bore along the intake camshaft, with a center line of the intake camshaft being offset from a mutual center line of the associated valves towards an outside direction of the cylinder bore; andan exhaust camshaft having a pair of exhaust cams for each cylinder, the exhaust cams of each pair having center lines offset from centers of associated exhaust valves towards an outside direction of the cylinder bore along the exhaust camshaft, with a center line of the exhaust camshaft being offset from a mutual center line of the associated valves towards an outside direction of the cylinder bore, and parallel relationship between the intake and exhaust camshafts being maintained.