ANORDNING FOR RENING AV AVGASER FRAN EN FORBRENNINGSMOTOR MED EN BLANDNINGSDOSERANDE ANORDNING

摘要

A reactor to oxidize unburned hydrocarbons and carbon monoxide is connected to the exhaust system of the engine. A further reactor is connected to the exhaust system designed to reduce nitrogen-oxygen compounds (NOx). A temperature sensing device senses the temperature of the reactors, and air is admitted to the exhaust system of the engine to control the temperature thereof; an oxygen signal is being sensed representative of oxygen component in the exhaust system of the engine and the mass ratio of air to fuel of the mixture supplied to the engine is controlled to provide for proper air-fuel ratio with minimum noxious exhaust. The two control loops thus formed are interconnected by the internal combustion engine, the control effects of the two control loops being balanced with respect to each other.