Catalytic monitoring method

Details Catalytic monitoring method Catalytic monitoring method

1998-10-19

2000-11-28

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

60274, F01N 300

Patent

active

061518891

ABSTRACT:
A catalytic monitoring method for an engine having two engine banks of which each coupled to one of two catalytic converters using first and second exhaust gas oxygen sensors, respectively upstream and downstream of one catalytic converter. Third and fourth exhaust gas oxygen sensors are respectively coupled upstream and downstream of the other catalytic converter. Switch ratios are determined for each of the engine banks based on the switching ratios of each upstream and downstream pair of exhaust gas oxygen sensors. A combination of the switch ratios is used to determine overall catalytic converter system performance.

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patent: 5357751 (1994-10-01), Orzel
patent: 5385016 (1995-01-01), Zimlich et al.
patent: 5544481 (1996-08-01), Davey et al.
patent: 5979160 (1999-11-01), Yashiki et al.

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