Automobiles, Peugeot

Societe Anonyme Automobiles Citroen

Michel Achard

Jacques Sigwald

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.

Device for purifying the exhaust gases of an internal combustion engine

The device regulates the flow of exhaust gas reintroduced in the induction pipe in accordance with the conditions of utilization of the engine. It consists mainly in modifying a depression case the movable wall of which is connected by a cable to the closure member regulating the amount of gas re-cycled. This wall has an opening with which cooperates a valve subjected to the opposed actions of a spring which tends to apply it against its seat and a rod actuated by the butterfly valve member placed in the induction pipe. In this way there is provided a control which is independent of the characteristics of the various springs and is therefore more precise.

Devices for re-cycling the exhaust gases of an internal combustion engine

The present invention relates to a device for controlling an automatic gearbox provided with a load correction valve subjected to the vacuum prevailing in the inlet manifold of the internal combustion engine associated therewith, wherein the pipe conveying the vacuum, which acts on the load correction valve, comprises a venting by-pass circuit controlled by a valve which allows venting when the engine is cold.

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La Garenne Colombes, France

Michel Achard