Controls for maintaining low nitrogen oxides content in internal

Details Controls for maintaining low nitrogen oxides content in internal Controls for maintaining low nitrogen oxides content in internal

1974-06-28

1976-08-10

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204195R, 204195P, 204195S, 60276, 60285, G01N 2746

Patent

active

039740404

ABSTRACT:
Control system and apparatus for measuring and monitoring the nitrogen oxides content of internal combustion engine exhaust gases. The exhaust gases are contacted with the reducing electrode of a sensor cell having a predetermined potential established between the cell electrodes so that the reducing electrode is able to reduce both the nitrogen oxides and oxygen content of the exhaust gas. The current flowing through the sensor cell is measured to determine whether the nitrogen oxides content of the exhaust gas is sufficiently low.

REFERENCES:
patent: 2991412 (1961-07-01), Kordesch
patent: 3223597 (1965-12-01), Hersch
patent: 3291705 (1966-12-01), Hersch
patent: 3314863 (1967-04-01), Hersch et al.
patent: 3622487 (1971-11-01), Chand et al.
patent: 3719564 (1973-03-01), Lilly et al.
patent: 3768259 (1973-10-01), Carnahan et al.
patent: 3821090 (1974-06-01), Topol et al.
patent: 3827237 (1974-08-01), Linder et al.
patent: 3930884 (1976-01-01), Zimmerman et al.

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