Apparatus for controlling the operation of an electromagnetic fu

Details Apparatus for controlling the operation of an electromagnetic fu Apparatus for controlling the operation of an electromagnetic fu

1987-11-23

1989-12-05

Hix, L. T.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

123490, 361205, F01L 118

Patent

active

048856584

ABSTRACT:
The invention relates to solid-state circuitry, including a freewheeling circuit, for controlling the operation of an electromagnetically actuated fuel intake or exhaust valve of an internal combustion engine by alternatingly energizing, by way of a current switching element, the coil of the electromagnet at a high level of current for attracting the armature of the electromagnet into engagement with the stator, thus driving the valve into its open or closed position, and maintaining, by way of a transistor, lower level current pulses in the coil sufficient to maintain the engagement.

REFERENCES:
patent: 4706619 (1987-11-01), Buchl

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