Power plants – Internal combustion engine with treatment or handling of... – Having means analyzing composition of exhaust gas
Patent
1980-03-04
1982-03-30
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Having means analyzing composition of exhaust gas
60289, 60301, 60306, F01N 322
Patent
active
043217923
ABSTRACT:
This device results in a very precise metering of the amount of air introduced by a first injector between two catalysts of an exhaust line. To achieve this, first regulating means are regulated so as to deliver a carburetted mixture which is richer than the stoechiometric composition. A second air injector and a second gas analyzer are placed in this order in the exhaust line between a first analyzer and a triple-function catalyst. The second analyzer is associated with second regulating means which control the flow of air in the second injector so as to bring the composition of the exhaust gases to that which would correspond to a richness of the carburetted mixture between the richness regulated by the first regulating means and the stoechiometric composition. Means are provided for maintaining the flows of air of the first and second air injectors proportional to each other.
REFERENCES:
patent: 4024706 (1977-05-01), Adawi
patent: 4068472 (1978-01-01), Takata
patent: 4191013 (1980-03-01), Katahira
patent: 4231220 (1980-11-01), Takeda
Automobiles Peugeot
Hart Douglas
Societe Anonyme Automobiles Citroen
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