Solenoid-operated fuel injection valve
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasao Nakayama, Tomoji Ishikawa, Natsuki Sugiyama
Life of this patent
Estimating the term…
Abstract
A solenoid-operated fuel injection valve includes a container into which fuel is introduced, a needle member that is disposed in the container and that moves longitudinally, and an electromagnetic controller provided with first and second magnetic circuits through which suction forces can be controlled independently of each other. The electromagnetic controller changes an area of a fuel flow passage defined as a space between an inner surface of the container and an outer surface of the needle member by moving the needle member by means of the suction forces. The fuel injection valve may provide two limit strokes to achieve variable injection rates.
Claims20
A solenoid-operated fuel injection valve comprising:
- a container into which fuel is introduced;
- a needle member that is disposed in the container and that moves longitudinally;
- and
- an electromagnetic controller that changes an area of a fuel flow passage defined as a space between an inner surface of the container and an outer surface of the needle member by moving the needle member through suction forces, the electromagnetic controller being provided with first and second magnetic circuits through which the suction forces can be controlled independently of each other.
A solenoid-operated fuel injection valve comprising:
- a container into which fuel is introduced;
- a needle member that is disposed in the container and that moves longitudinally;
- and
- an electromagnetic controller that changes an area of a fuel flow passage defined as a space between an inner surface of the container and an outer surface of the needle member by moving the needle member through suction forces, the electromagnetic controller being provided with first and second magnetic circuits through which the suction forces can be controlled independently of each other, each circuit being defined by a pair of magnetic bodies opposed and attracted to each other across first and second gaps, respectively, of differing distances to longitudinally move the needle member by suction forces of the magnetic bodies when actuated to two different limit stroke positions to provide two differing fuel rates into the container.
Dependencies are inferred from the claim text.