Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1998-04-02
1999-11-02
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
361154, H01H 4732
Patent
active
059750570
ABSTRACT:
A fuel injector control circuit and method include first switching circuitry (128, 134, 138, 142, 148, 152, 154) to selectively apply a first electrical signal (171) to a solenoid (114) to vary a load signal (176) between a first maximum (201) threshold and a first minimum (203) threshold. Second switching circuitry (130, 132, 136, 140, 148, 154) to selectively applies a second electrical signal (198) to the load (114) to vary the load signal (176) between a second maximum (205) threshold and a second minimum (207) threshold. The second electrical signal (198) has a magnitude substantially higher than the first electrical signal. Preferably, the second maximum threshold (205) has a magnitude less than a magnitude of the first maximum threshold (201), and greater than a magnitude of the first minimum threshold (203), and the second minimum threshold (207) has a magnitude less than the magnitude of the first minimum threshold (203).
REFERENCES:
patent: 4479161 (1984-10-01), Henrich et al.
patent: 4729056 (1988-03-01), Edwards et al.
patent: 4764840 (1988-08-01), Petrie et al.
patent: 5701870 (1997-12-01), Gottshall et al.
Repplinger Scott
Sawyer Richard
Argenbright Tony M.
Cunningham Gary J.
Motorola Inc.
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