Fuel injection valve drive system

Details Fuel injection valve drive system Fuel injection valve drive system

1979-12-28

1982-08-24

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Fuel injection system

361154, F02D 502, H01F 718

Patent

active

043455646

ABSTRACT:
A fuel injection valve drive system is disclosed for use in an internal combustion engine including at least one solenoid operated fuel injection valve. The system comprises a first pulse generator for providing, in synchronism with rotation of the engine, a first pulse signal having a constant pulse width, a second pulse generator for providing a second pulse signal of pulse width dependent upon the amount of air introduced to the engine, first switch means responsive to a first pulse signal for allowing small current to flow through the solenoid coil of the fuel injection valve so as not to open the fuel injection valve, and second switch means responsive to a second pulse signal for allowing large current to flow through the solenoid coil so as to open the fuel injection valve. Means are provided for causing the second pulse generator to generate a second pulse signal a time after the first pulse generator generates a first pulse signal.

REFERENCES:
patent: 2970246 (1961-01-01), Gunkel
patent: 3700985 (1972-10-01), Applequist
patent: 3852646 (1974-12-01), Mason
patent: 3913536 (1975-10-01), Lapple et al.
patent: 3982505 (1976-09-01), Rivere
patent: 4234903 (1980-11-01), Harper
patent: 4238813 (1980-12-01), Carp et al.

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