Method and device for determining the lambda value with a broadband lambda sensor of an internal combustion engine, particularly of a motor vehicle
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United States of America Patent
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Jan 23, 2018
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Jan 9, 2014
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Mar 8, 2013
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Abstract
In a method for determining the lambda value with a broadband lambda sensor of an internal combustion engine, a measurement current is supplied by the lambda sensor, which measurement current is proportional to the oxygen content or rich gas content in the exhaust gas of the internal combustion engine, and the corresponding proportionality factor is determined by a thrust comparison. The thrust comparison uses the O2 concentration of dry air as reference, independent of an actually present air humidity, and the lambda value is calculated on the basis of a modified Pischinger conversion equation in which a signal supplied by a humidity sensor is taken into account.
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