Method and apparatus for analyzing catalyst and other systems op

Details Method and apparatus for analyzing catalyst and other systems op Method and apparatus for analyzing catalyst and other systems op

1997-02-10

1999-02-09

Dorobroske, George M.

Measuring and testing

Gas analysis

Gas of combustion

60276, 123703, F01N 320

Patent

active

058697438

ABSTRACT:
A method of analyzing exhaust gas emissions from an internal combustion engine is modified by the provision of a data process or connected to an exhaust gas analyzer and adapted to monitor changes in exhaust gas concentrations and to identify changes indicative of the state of operation of a catalytic system provided in the engine exhaust delivery system. The catalyst-on condition is identified by reference to the characteristic shape of the plot of the gas concentrations against time. Similar identification of catalyst-off conditions is provided by corresponding analysis of concentration changes and concentration values. The system can distinguish between various causes of the catalyst-off condition.

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