Determining a fuel evaporating of a lubricant within an internal combustion engine and lambda - value - adaptation on the basis of the determined fuel evaporating

摘要

It is a method for determining the amount of a fuel evaporating of a lubricant, which is in a housing of an internal combustion engine is located, in an intake tract of the internal combustion engine. The method has, on (a) adjustment of a first scavenging flow through the housing, (b) measuring a first output value of a lambda controller of the internal combustion engine, (c) setting a second purge stream through the housing, wherein the second stream in comparison to the first stream has a different velocity, (d) measuring a second output value of the lambda regulator of the internal combustion engine and (e) determining the quantity of fuel evaporating on the basis of the measured first output value and the measured second output value. It is also a method for adapting of a lambda - value for a in an internal combustion engine during a lower load range to be combusted fuel / air - mixture. The lambda - value - adaptation method comprises the above-mentioned method of determining the amount of a fuel evaporating. Furthermore, an internal combustion engine for a motor vehicle, which can carry out the above-mentioned process.