Injector drive circuit

Details Injector drive circuit Injector drive circuit

1999-05-25

2000-09-26

Solis, Erick R.

Internal-combustion engines

Charge forming device

Fuel injection system

361154, 361155, 361156, F02M 5100

Patent

active

061230588

ABSTRACT:
An injector drive circuit capable of driving an injector of an internal combustion engine without using a DC-DC converter expensive. The injector drive circuit includes a power circuit for converting a voltage outputted from a magneto mounted on the engine into a DC voltage, a capacitor charged with a voltage accumulated in a voltage accumulator, a drive current feed circuit for applying a voltage across the capacitor to a solenoid coil to feed a drive current to the solenoid coil when it is fed with an injection command signal, and a holding current feed power supply section for feeding the solenoid coil with a holding current required for keeping a valve open after the drive current fed from the capacitor to the solenoid coil passes a peak value.

REFERENCES:
patent: 5216994 (1993-06-01), Aoki et al.
patent: 5287839 (1994-02-01), Kondou et al.
patent: 5515830 (1996-05-01), Arakawa
patent: 5558065 (1996-09-01), Arakawa

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