초록 ▼

An electromagnetic valve actuating system opens and closes intake and exhaust valves of an engine under electromagnetic forces generated by an electromagnet. A reciprocally movable magnetic pole (8a) is coupled to the stem end of an intake/exhaust valve (8). An upper fixed permanent magnet (3) confr

An electromagnetic valve actuating system opens and closes intake and exhaust valves of an engine under electromagnetic forces generated by an electromagnet. A reciprocally movable magnetic pole (8a) is coupled to the stem end of an intake/exhaust valve (8). An upper fixed permanent magnet (3) confronts one end of the movable magnetic pole (8a) the direction in which it is reciprocally movable. The intake/exhaust valve is opened and closed under attractive and repelling forces acting between the movable magnetic pole (8a) and the upper fixed permanent magnet (3). Since the polarity of the movable magnetic pole can be changed depending on how the first coil (5), the second coil (6), and the third coil (7) are energized, the timing to open and close the intake/exhaust valve (8) can be varied depending on the operating condition of the engine (1).

대표청구항 ▼

An electromagnetic valve actuating system for opening and closing a valve, such as an intake and exhaust valve of an engine, comprising: a movable magnetic pole coupled to the valve having a first and second end, said movable magnetic pole being mounted for reciprocating movement; an upper fixed per

An electromagnetic valve actuating system for opening and closing a valve, such as an intake and exhaust valve of an engine, comprising: a movable magnetic pole coupled to the valve having a first and second end, said movable magnetic pole being mounted for reciprocating movement; an upper fixed permanent magnet confronting said movable magnetic pole; a first intermediate fixed magnetic pole coupled to said upper fixed permanent magnet and confronting said movable magnetic pole; a second intermediate fixed magnetic pole coupled to said upper fixed permanent magnet and confronting the end of said movable magnetic pole when the valve is open; a distal fixed magnetic pole coupled to said second intermediate fixed magnetic pole and confronting a side of said valve; a first coil for generating a magnetic flux passing through said first intermediate fixed magnetic pole; a second coil for generating a magnetic flux passing through said second intermediate fixed magnetic pole; a third coil for generating a magnetic flux passing through said movable magnetic pole; and energization control means for energizing said first, second, and third coils to open and close said valve.