Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1997-01-21
1999-02-02
Denion, Thomas E.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60277, F01N 300
Patent
active
058650261
ABSTRACT:
A system and method for monitoring emissions by monitoring performance of a catalytic converter using a predetermined indicated threshold value include determining a current value for the indicator based on signals generated by at least one exhaust gas sensor, modifying a historical indicator value based on the current value, and adjusting the predetermined indicator threshold based on the historical indicator value. The predetermined indicator threshold is adjusted provided various adapt criteria are satisfied. The historical indicator value is compared to the threshold to determine whether to generate a malfunction indicator signal. In one embodiment, emissions are indicated using a switch ratio based on the number of switches or transitions for upstream and downstream exhaust gas oxygen sensors.
REFERENCES:
patent: 5077970 (1992-01-01), Hamburg
patent: 5289678 (1994-03-01), Grutter
patent: 5357753 (1994-10-01), Wade
patent: 5385016 (1995-01-01), Zimlich et al.
patent: 5467593 (1995-11-01), Vincent et al.
patent: 5758490 (1998-06-01), Maki et al.
Davey Christopher Kirk
Jerger Robert Joseph
Denion Thomas E.
Ford Global Technologies Inc.
Lippa Allan J.
May Roger L.
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