A system for controlling a retro - action of the air / fuel ratio of a mixture of air - fuel in a system of the admission of internal combustion engine

摘要

System for a command has retro - action of the ratio air-fuel a mixture of air - fuel in a system of the admission of internal combustion engine. / p & & p & the system of control a retro - action of the invention uses a sensor 110 of the ratio air-fuel sensitive to the oxygen, is provided in the intake passage 82 downstream of the device of the fuel supply. An ignition means 116 is provided in the intake passage so that the sensor is in contact with the combustion gases. The sensor which is at a concentration of the cell comprises a layer of solid electrolyte and receives a constant current (dc). / p & & p & it comprises a feature such tilted and we shall now describe the ratios air-fuel to the - above or - below the stoichiometric ratio. It comprises also a feature all or nothing and we shall now describe the stoichiometric ratio as a function of the intensity and direction of the current. This system includes a closed loop reduced and can be carried out very rapidly the correction of a ratio air-fuel.