Device for correcting the air/petrol ratio for an internal combustion engine
OwnerBernard R. Laprade, Xavier J. Laprade +1inventors
InventorsBernard R. Laprade, Xavier J. Laprade, Pierre J. Gele
Life of this patent
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Abstract
A device for correcting the proportioning of the air/petrol mixture furnished by a proportioning means to an internal combustion engine comprising a probe producing a signal which is a function of the oxygen or carbon monoxide content of engine exhaust gas and an auxiliary air admission valve downstream of the air/petrol proportioning means, this valve being periodically operable by control means sensitive to said signal.
Claims7
A device for correcting the proportioning of the air-petrol mixture furnished by a proportioning member to an internal combustion engine having an intake pipe connected from the proportioning member and an exhaust pipe for burnt gases, the device comprising at least one auxiliary air inlet tapped into said intake pipe downstream of the member determining the proportioning of the air-petrol mixture, means for providing auxiliary air to said at least one auxiliary air inlet at overpressure with respect to the pressure prevailing in the intake pipe, at least one valve controlling the air inlet or inlets, a probe arranged in the exhaust pipe for delivering an electric signal which is a function of the composition of the burnt gases, and electronic means releasing electrical pulses controlling the opening of the valve or valves in synchronism with the engine so as to introduce into the mixture a quantity of air predetermined at each cycle of the engine in response to the information from the probe when the concentration of oxygen in the burnt gases is lower than a predetermined value (or the concentration of CO is higher than a predetermined value).
Dependencies are inferred from the claim text.