Method and apparatus for monitoring the conversion ratio of a ca

Details Method and apparatus for monitoring the conversion ratio of a ca Method and apparatus for monitoring the conversion ratio of a ca

1991-02-11

1992-07-28

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60277, 60285, 60286, F01N 320

Patent

active

051331845

ABSTRACT:
To provide assured monitoring of the conversion ratio of an exhaust gas catalytic converter in the exhaust system of an internal combustion engine of a motor vehicle, at least one ignition suppression is generated and a preset quantity of fuel-air mixture is supplied during a deceleration phase of the engine and the difference in the temperatures at locations downstream and upstream with respect to the flow of exhaust gas through the catalytic converter is detected and evaluated.

REFERENCES:
patent: 4953351 (1990-09-01), Motz

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