SENSOR ARRANGEMENT FOR THE DETERMINATION OF GASEOUS COMPONENTS AND / OR CONCENTRATIONS OF GASES FROM GAS MIXTURES.

摘要

A SENSOR IS PROPOSED FOR THE DETERMINATION OF GAS CONCENTRATIONS, IN PARTICULAR CO, COX AND HC IN INTERNAL COMBUSTION ENGINE EMISSIONS. THE SENSOR INCLUDES A MEASUREMENT ELEMENT (10) LOCATED IN A DIFFUSION CHANNEL (23). THE DIFFUSION CHANNEL (23) IS EXPOSED TO THE MIXTURE OF GASES THAT PASSES THROUGH AN INTAKE (24) OF EXHAUSTING GAS AND WITH REFERENCE TO THE GAS THAT PASSES THROUGH AN INPUT (25) OF REFERENCE GAS, THE PARTIAL OXYGEN PRESSURE IN THE GAS OF DIFFERENCE GREATER THAN IN THE GAS MIXTURE. AN OXYGEN GRADIENT IS ESTABLISHED IN THE DIFFUSION CHANNEL (23), AND A GRADIENT FOR THE GAS COMPONENT TO BE DETERMINED IN THE OPPOSITE DIRECTION. THE MEASUREMENT ELEMENT (10) IS LOCATED AT ONE POINT, WITH REGARD TO THE GRADIENT OF HARMFUL SUBSTANCES AND THE GRADIENT OF OXYGEN, IN WHICH OXYGEN IS IN EXCESS.