????FULL EXPLANATION of a wideband lambda probe in a gasoline engine????

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MIAC DIAGNOSIS

Published on Sep 10, 2021
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Explanation of the electrical operation of a broadband lambda probe. Description of its connections and justification of the real values ​​of the existing voltages between them and (-) ground. In the equation that explains how the formation process of an oxygen ion occurs, this is the formula O2 + 4e = 2O2- -Explanation of the electrical operation of the control circuit for the heating current of the lambda probe. -Analysis of the oscillograms of the existing voltages in the conductors that go from the probe connector to the lambda probe: Yellow cable measurement of the reference voltage. Red cable measurement and analysis of the oscillogram of the pumping voltage. Green cable measurement of the Nerst voltage. -Measurement of the differential voltage between the pumping voltage terminal (red cable) with respect to the yellow reference voltage cable. Analysis of the oscillogram obtained. Grey cable supply voltage with respect to (-) ground of the lambda probe heater. Analysis of the oscillogram obtained White cable measuring the control voltage by negative with respect to ground. Analysis of the oscillogram obtained. Measurement of the heating current with an ammeter clamp. Analysis of the oscillogram obtained. The tests were carried out with a PICO PQ178 oscilloscope. The product link is this https://www.miac.es/tienda-producto-v...

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