Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1998-07-17
2000-04-18
Solis, Erick R.
Internal-combustion engines
Charge forming device
Fuel injection system
123690, 701107, F02M 5100
Patent
active
060502436
ABSTRACT:
Internal combustion engine air/fuel ratio control responsive to low voltage operating conditions of an electrical system maintains stable, precise air/fuel ratio conditions under electrical system fault conditions affecting operation of fuel control components including fuel pumps, fuel injectors, and drivers therefor. Electrical system operating voltage is monitored and when a voltage drop below a voltage threshold associated with reliable engine cylinder air/fuel ratio control is diagnosed, the air/fuel ratio smoothly transitions to a reduced engine performance operating mode which, at least for high engine output power requests, limits fueling and airflow to the engine cylinders to a level that may be accurately, reliably supported by the fuel control system components under their reduced electric drive signals. The reduced performance operating mode is maintained while the fault condition persists.
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Cishosz Vincent A.
General Motors Corporation
Solis Erick R.
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