On-line catalyst monitoring using a Kalman filter

Details On-line catalyst monitoring using a Kalman filter On-line catalyst monitoring using a Kalman filter

2006-05-16

2006-05-16

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S285000, C701S109000, C701S115000, C703S008000

Reexamination Certificate

active

07043899

ABSTRACT:
A method of non-intrusive monitoring of catalyst performance in an automotive exhaust system uses a model of catalytic converter operation emphasizing oxygen storage capacity dominance. Model parameters are identified using a recursive Kalman filtering technique. A catalyst diagnostic index is derived from at least one identified parameter, and the index is used to judge converter performance.

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