The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 1977
Filed:
Sep. 12, 1975
Jean-Pierre Rivere, Paris, FR;
Regie Nationale des Usines Renault, Boulogne-Billancourt, FR;
Automobiles Peugeot, Paris, FR;
Abstract
An electro-pneumatic device for regulating the supply of air to an internal combustion engine having a carburettor is arranged to supply the air to the engine into a manifold downstream of the carburettor and the air supply is controlled to adjust the richness of the main stream of air and fuel entering the engine to control the richness of the combustible mixture. The device includes a pneumatic regulator valve having two stages in series with each other and the opening and closing of this valve is controlled, to adjust the rate of air supply, by a command pressure produced by connecting the valve alternately to a source of the mixture delivery pressure from the carburettor and a source of higher pressure. This alternate connection is effected by an electrically-operated valve actuated by a signal of square wave form, the frequency of which is a function of engine speed and of a signal delivered by a sensor which senses the composition of the exhaust gases from the engine.