Exhaust gas catalyst monitoring

Details Exhaust gas catalyst monitoring Exhaust gas catalyst monitoring

G - Physics

01

M

73/164

G01M 15/00 (2006.01) F01N 11/00 (2006.01)

Patent

CA 2036149

ABSTRACT . EXHAUST GAS CATALYST MONITORING. Operation of an internal combustion engine is controlled by an engine management system in response to a lambda sensor which monitors the oxygen content of exhaust gas flowing into a catalytic converter. A universal exhaust gas oxygen (UEGO) sensor monitors the amount of oxygen in exhaust gas leaving the converter. The engine management system cycles the air/fuel ratio above and below stoichiometric and the peak-to-peak amplitude of the UEGO sensor output represents the performance of the catalyst in the converter such that larger amplitudes correspond to poorer performance.

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