ELECTROCHEMICAL SENSOR OF SPECIES CONCENTRATIONS IN A FLUID MIXTURE AND SYSTEM FOR REGULATING THE WEALTH OF AN AIR-FUEL MIXTURE USING SUCH A SENSOR

摘要

The object of the invention is an electrochemical sensor for the concentrations of species in a fluid mixture, comprising an EP-E-EP measurement cell, of the internal reference pressure partial pressure type, comprising a catalytic zone C in which GASEOUS MIXTURE IS PROVIDED WITH THERMODYNAMIC BALANCE AND OPERATING ACCORDING TO THE SAID "TEST TAKE-OFF" PROCESS SO THAT A LOW QUANTITY OF GAS MIXTURE IS ANALYZED INSIDE THE SENSOR. ACCORDING TO THE MAIN CHARACTERISTIC OF THE INVENTION THE SENSOR INCLUDES AN ADDITIONAL EEA CELL OPERATING IN ION PUMP SO AS TO CONTINUOUSLY MODIFY THE COMPOSITION OF THE GAS MIXTURE PERMITTED INSIDE THE SENSOR UNDER THE CONTROL OF AN ADJUSTABLE ELECTRIC CURRENT I /. P P APPLICATION IN PARTICULAR TO THE CONTINUOUS REGULATION OF THE RICHNESS OF AN AIR-FUEL MIXTURE ALLOWED IN THE CYLINDERS OF AN INTERNAL COMBUSTION ENGINE, ACCORDING TO A DIGITAL OR ANALOG MODE OF OPERATION.