Sensor subject-matter of the relative concentrations of the reactive species in a mixture of fluid, and a system comprising such a sensor, in particular for the regulation

摘要

P the invention relates to an electrochemical sensor of the relative concentrations of reactive species in a fluid mixture. / p & & p & the sensor according to the invention comprises a first catalytic chamber intended to bring the fluid mixture to the thermodynamic equilibrium, a second enclosure comprising an electrochemical cell sensitive to the excess of one of the reactive species with respect to the stoichiometry of the reaction and the additional means, located upstream or coincident with the first enclosure, forming a transfer impedance selective - to - screw of the species of the fluid mixture to be analyzed, transfer impedance modifying the ratio of the relative concentrations of the reactive species of the fluid mixture in predetermined proportions. / p & & p & application to the regulation of the combustion engines, and to the regulation of a fluid mixture of both species. / p