Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1994-12-09
1995-10-31
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123692, F02D 4114
Patent
active
054620384
ABSTRACT:
An air/fuel control system (8) and method to maintain the air/fuel ratio of each engine bank (28) out of phase with one another. A feedback variable is generated (410-428) in response to a comparison of a difference in exhaust gas oxygen sensors (44, 55) from respective left and right engine banks (56, 57) to a reference (104-120). Separate feedback variables are generated for each engine bank by phase inverting the feedback variable between the banks and adding an adjustment signal (450-462). The adjustment signal is generated from a PI controller responsive to a comparison of the sum of the left and right exhaust gas oxygen sensors (44, 55) to a reference (440-448).
REFERENCES:
patent: 4703735 (1987-11-01), Minamitani et al.
patent: 5074113 (1991-12-01), Matsuoka
Christensen Edward L.
Kotwicki Allan J.
Lloyd Susan J.
Szuszman Paul J.
Dolinar Andrew M.
Ford Motor Company
Lippa Allan J.
May Roger L.
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