Method for detecting the condition of catalytic converters

Details Method for detecting the condition of catalytic converters Method for detecting the condition of catalytic converters

1989-11-28

1991-05-28

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60277, F01N 318

Patent

active

050183486

ABSTRACT:
An internal combustion engine has a catalytic converter in its exhaust gas path. In the catalytic converter, two exhaust gas emission measuring probes are provided spatially separated from one another. The phase shift between the output signals of these two measuring probes is used as a measure of the aging of the catalytic converter.

REFERENCES:
patent: 4622809 (1986-11-01), Abthoff
patent: 4707984 (1987-11-01), Katsuno et al.
patent: 4707985 (1987-11-01), Nagai et al.
patent: 4720973 (1988-01-01), Katsuno
patent: 4739614 (1988-04-01), Katsuno
patent: 4761950 (1988-08-01), Nagai et al.

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