| 摘要 |
The invention relates to an electromagnetic actuator (17) for a valve (9) of an internal combustion engine, comprising: a frame (19) defining at least an upper magnetic circuit (20) and a lower magnetic circuit (21), each magnetic circuit (20, 21) including a central core (30), a ring magnet (22, 23) extending around the core (30) and an external ferromagnetic polar ring piece (24, 25); and a moving part (41) including a carcass (42) having a tubular body (44), an upper coil (48) wound around the body (44) of the carcass (42) perpendicular to the upper magnetic circuit (20), a central coil (49) wound around the body (44) of the carcass (42) between the upper magnetic circuit (21) and the lower magnetic circuit (20), and a lower coil (50) wound around the body (44) of the carcass (42) perpendicular to the lower magnetic circuit (21). |
