Solenoid actuator
AssigneeSentec Ltd
InventorAndrew Dames
Life of this patent
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Abstract
A short travel solenoid actuator (44) is disclosed which comprises at least one pole piece (47, 48), an armature (51), an electromagnet coil (46) arranged, in response to energisation, to actuate the armature between first and second positions. A permanent magnet (52) is positioned and orientated so as to latch the armature in the first and second positions when the armature is in the first and second positions respectively. A spring (53) is arranged to bias the armature.
Claims8
(canceled)
A method of operating a fuel injector which comprises a solenoid actuator comprising at least one pole piece, an armature, an electromagnet coil arranged, in response to energisation, to cause travel of the armature from a first, closed position towards a second, fully-open position, a permanent magnet positioned and orientated so as to magnetically latch the armature in the first and second positions when the armature is in the first and second positions respectively and a spring arranged to bias the armature and configured to provide sufficient force so as to prevent the armature from latching in the second position, the method comprising:
- using closed-loop control.
Dependencies are inferred from the claim text.