Electronic fuel injector driver circuit

Details Electronic fuel injector driver circuit Electronic fuel injector driver circuit

1993-04-30

1995-07-04

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

361153, 123490, H01H 4722

Patent

active

054306019

ABSTRACT:
An electronic fuel injector driver circuit is a high speed operator of electromagnetic fuel injector valves for internal combustion engine. The drive circuit includes a solenoid coil for each electromagnetic fuel injector. A one shot timer circuit sends a predetermined timing signal to a first controller circuit interconnecting the one shot timer circuit and the solenoid coil wherein the predetermined timing signal is used to control the high side of the solenoid coil. A second controller circuit is connected to the solenoid coil and controls the low side of the solenoid coil in response to the predetermined timing signal. A switchable voltage reference circuit is connected to the second controller circuit and controls current through the solenoid coil.

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patent: 4764840 (1988-08-01), Petrie et al.
patent: 5159522 (1992-10-01), Gray
Automotive Electronics, "Fundamental of Electronic Fuel Injection", J. Gyorki, Feb. 1974, pp. 237-244.
"The Electronic Control Unit for Production Electronic Fuel Injection Systems", J. G. Rivard, no date.

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