Patent ID: 7306196

Claim:
An electromagnetically driven valve, comprising: an intake/exhaust valve associated with an internal combustion engine; a moving element made of a magnetic substance and coupled to said intake/exhaust valve to move between a valve-opening position and a valve-closing position; and an electromagnet having a first coil supplied with a current to thereby generate a first magnetic flux and generate electromagnetic force in a direction moving said moving element toward said valve-opening position, and a second coil supplied with a current to thereby generate a second magnetic flux and generate electromagnetic force in a direction moving said moving element toward said valve-closing position, said first coil and said second coil being constituted of an identical connection, wherein said moving element is held in an intermediate position between said valve-opening position and said valve-closing position in a state where electromagnetic force is not applied, said electromagnet further has a third coil constituted of a separate connection from said connection constituting said first and second coils, and said third coil is supplied with a current to thereby generate a third magnetic flux reducing at least one of said first magnetic flux and said second magnetic flux.