System for monitoring the performance of automotive catalysts

Details System for monitoring the performance of automotive catalysts System for monitoring the performance of automotive catalysts

1994-07-05

1995-07-11

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60285, F01N 320

Patent

active

054310121

ABSTRACT:
This invention is directed to a system for monitoring the efficiency of a catalyst employed to convert exhaust gases containing carbon monoxide, hydrocarbons and nitrogen oxides, e.g., those generated by an internal combustion engine such as in an automobile. The system comprises a thin-film resistive device and an electrical circuit connected to said thin-film resistive device capable of determining a change in the electrical resistance of a electrically conductive material provided in the device, the electrical resistance being subject to change during conversion of said exhaust gases over the catalyst.

REFERENCES:
patent: 3882451 (1975-06-01), Fujikshiro et al.
patent: 4319451 (1982-03-01), Tajima
patent: 4656829 (1987-04-01), Creps
patent: 4729220 (1988-03-01), Terasaka
patent: 5060473 (1991-10-01), Nakagawa
patent: 5255511 (1993-10-01), Maus et al.

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