Engine valve control apparatus

摘要

Control apparatus for an intake valve and/or an exhaust valve which are slidably mounted for reciprocating movement relative to a valve seat in a cylinder head including an electromagnetic solenoid fixed to the cylinder head and a magnetic pole fixed to at least one of the valves with the magnetic pole opposing the solenoid with a small gap therebetween when the valve(s) is in the open position and a control device for supplying electric current to the electromagnetic solenoid in a predetermined manner responsive to engine operation conditions. The valve(s) is moved to the open position by a cam, electric current is supplied to the electromagnetic solenoid to hold the valve(s) in the open position for a predetermined time and the valve(s) is closed by a return spring when the electromagnetic solenoid is deenergized.