Regulating system with electromagnetic valve and control valve
OwnerBernard R. Laprade, Xavier J. Laprade +1inventors
InventorsBernard R. Laprade, Xavier J. Laprade, Pierre J. Gele
Life of this patent
Estimating the term…
Abstract
An internal combustion engine of a known design includes a device for correcting the air-fuel dose. The device has a gas inlet connected to the induction manifold, and a control valve controlling the gas inlet. The control valve is controlled by the negative pressure at the throat of a venturi by means of a control means including a spring biassed diaphragm and subjected to the negative pressure. The said pressure may be modified by an electromagnetic valve controlled by means of a probe positioned in the exhaust manifold, which delivers electrical current varying in accordance with the burned gases. This current controls, via an electronic device, and electromagnetic valve.
Claims10
An arrangement for correcting the proportion of the air and fuel mixture furnished to an internal combustion engine having an induction manifold containing a venturi and a butterfly valve for determining the air flow rate, and an exhaust manifold, said arrangement comprising:
- means defining at least one gas inlet connected to the induction manifold downstream of the butterfly valve,
- means responsive to the negative pressure prevailing at the throat of the venturi upstream of the butterfly valve for controlling flow through said gas inlet, said control means including a control valve having a preloaded diaphragm, a conduit connecting the throat of the venturi and said control valve for subjecting the diaphragm to the negative pressure at the venturi throat, and resilient return means for biasing said diaphragm, and
- electric circuitry including a sensor disposed in the exhaust manifold of the engine for delivering an electric current which is variable as a function of the composition of the burnt gases, and an electromagnetic valve for modulating the negative pressure to which said diaphragm is subjected, said electromagnetic valve being regulated in response to the electric current delivered by said sensor.
Dependencies are inferred from the claim text.