Engine having continuously variable valve timing mechanism

摘要

An engine having a variable valve timing mechanism may include a camshaft having a cam formed thereon for moving an intake or exhaust valve, a variable rotation unit disposed on the same axis with the camshaft to rotate the camshaft to have a retard angle chamber and an advance angle chamber for controlling a retard angle and an advance angle of the camshaft, a variable valve bolt having a fastening portion for fastening the variable rotation unit to the camshaft, and an oil control valve for making selective supply of hydraulic oil to the retard angle chamber and the advance angle chamber, and a valve controller disposed on an outer side of the variable rotation unit for controlling the oil control valve in the variable valve bolt.

主权项

1. An engine having a variable valve timing mechanism comprising:
a camshaft having a cam formed thereon for moving an intake or exhaust valve; a variable rotation unit being coaxially disposed with the camshaft to rotate the camshaft and having a retard angle chamber and an advance angle chamber for controlling a retard angle and an advance angle of the camshaft; a variable valve bolt having:
a fastening portion for fastening the variable rotation unit to the camshaft; andan oil control valve for making selective supply of hydraulic oil to the retard angle chamber and the advance angle chamber; and a valve controller disposed on an outer side of the variable rotation unit for controlling the oil control valve in the variable valve bolt, wherein the valve controller is attached to an outer side of a cover which covers a belt or a chain.