Massenspektrometrische Untersuchung des Ölemissionsverhaltens von Verbrennungsmotoren bei stationärem und transientem Betrieb

Further reduction of emissions from internal combustion engines requires further reduction of their oil emission behavior as unburned oil emitted through the exhaust contributes to hydrocarbon raw emissions as well as CO2 emissions. As lube oil consumption behavior is different for steady-state and transient engine operation, both aspects need to analyzed in order to identify remaining potential for oil emission reduction while maintaining sufficient lubrication in all engine operating conditions. The results of oil emission measurements on different passenger car engines disclose oil emission characteristics for the whole loadspeed range of these engines at steady-state operation. The development of a transient test cycle for standardized dynamic oil emission analysis and the introduction of methods for quantification and evaluation of dynamic oil emission effects allow identification of the mechanisms involved and thus their optimization.