A method for measuring the oxygen concentration in a gas mixture and, in particular, in the exhaust gases of a chemical combustion, for example, the exhaust gases of an internal combustion engine with internal or outer combustion and ionizing probe for carrying out this method

摘要

P for determining the percentage of oxygen in the exhaust gases of an internal combustion engine or external, there is a probe for ionization 1 in the path of the gas. This probe is powered in parallel with a sensor identical 2 crossing by the ambient air, the door has the same temperature as the exhaust gases of. The sum 13 of the currents collected by the two probes is comparative 14 is at a voltage proportional to the high voltage 17 to 19, or at a constant voltage 16, or at a constant current 16a, and as a function of the difference is regule the high voltage supply of the probes 7. On the other hand, the currents collected by the probes are compares 10, and the result of this comparison permits of determining the percentage of oxygen. / p