Flexible fuel tolerant catalytic converter diagnostic method

Details Flexible fuel tolerant catalytic converter diagnostic method Flexible fuel tolerant catalytic converter diagnostic method

2011-02-22

2011-02-22

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S276000, C060S285000, C060S299000

Reexamination Certificate

active

07891168

ABSTRACT:
A monitoring system for a catalytic converter is provided. The system includes: a fuel determination module that determines a fuel composition based on a sensed composition of fuel in a fuel system; a fuel/air (F/A) determination module that selectively determines a stoichiometric F/A ratio based on the fuel composition; and an oxygen storage capacity (OSC) diagnostic module that computes a target OSC based on the stoichiometric F/A ratio, that compares the target OSC to a reference value and diagnosis the catalytic converter based on the comparison.

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patent: 7159623 (2007-01-01), Carr et al.
patent: 2006/0236976 (2006-10-01), Carlson

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