Page 194 - Methods For Monitoring And Diagnosing The Efficiency Of Catalytic Converters A Patent - oriented Survey
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176 Methods for Monitoring and Diagnosing the Eficiency of Catalytic Converters
R,=- a2 -4 x 100
a2
where
a2, b2: output amplitudes of .,an mixtures of upstream and downstream sensors respectively
(fig. SO), or
where
a3, b3: output amplitudes of rich mixtures of upstream and downstream sensors respectively
(fig. 80).
upstream
sensor
output 0 I
(VI
sensor
output ()
(VI
t
rich
Fig. 80 (from US5157921)
