Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1994-08-01
1996-04-30
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 123692, 123696, F01N 320
Patent
active
055113770
ABSTRACT:
An air/fuel control system (8) and method for an engine (28) having two engine banks coupled to a single catalytic converter (50). First and second exhaust gas oxygen sensors (44, 55) are coupled to respective first and second exhaust manifolds (56, 57). A feedback signal is generated by a PI controller responsive to an average (104-120) of the first and second sensor outputs (44, 45). An adjustment signal is generated (440-448) by another PI controller responsive to a difference between the first and second sensor outputs (44, 45). Fuel delivered to the first engine bank (300a-306a) is adjusted by a first modified feedback signal generated by adding the adjustment term to the feedback signal (450-454). And, fuel delivered to the second engine bank (300b-306b) is adjusted by a second modified feedback signal generated by adding the adjustment term to the feedback signal (460-462).
REFERENCES:
patent: 4703735 (1987-11-01), Minamitani
patent: 4766870 (1988-08-01), Nakajima
patent: 4984551 (1991-01-01), Moser
patent: 5074113 (1991-12-01), Matsuoka
patent: 5213088 (1993-05-01), Harada
patent: 5341788 (1994-08-01), Uchida
Ford Motor Company
Hart Douglas
Lippa Allan J.
May Roger L.
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