Inductive load drive circuit, particularly for fuel injections

Details Inductive load drive circuit, particularly for fuel injections Inductive load drive circuit, particularly for fuel injections

1993-02-05

1994-08-23

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307494, 307241, 307571, 307573, 361154, 361187, 361194, 123490, H03K 301, H03K 17687, H01H 900, F02M 5100

Patent

active

053410327

ABSTRACT:
A circuit comprising a switch series connected to a load; a first and second current recirculating branch alternately connectable parallel to the load, for reducing the current in the same; and a logic control unit for opening and closing the switch and recirculating branches, so that the load is supplied with a current rising to a peak value and then falling rapidly to and oscillating about a lower hold value; a transistor being provided for reducing the voltage supplied to the load by the first recirculating branch at the end of the fast fall phase, so as to eliminate uncontrollable operating zones and prevent the load current from falling below the hold value.

REFERENCES:
patent: 4238813 (1980-12-01), Carp et al.
patent: 4292948 (1981-10-01), Graessley
patent: 4327394 (1982-04-01), Harper
patent: 4358812 (1982-11-01), LoCascio et al.
patent: 4612597 (1986-09-01), Hamren
patent: 5072141 (1991-12-01), Eisenbart et al.

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