Publication SAE: Piston ring pack fuel transport

The limitation of fuel entry into the oil sump of an internal combustion engine during operation is important to preserve the tribological properties of the lubricant and limit component wear. For observationand quantification of the effects leading to fuel entry, a highly sensitive and versatile measurement system is essential. While oil sampling from the sump followed by laboratory analysis is a common procedure, there is no system for automatic sampling of all the positions and fast online analysis of the samples.
2015, Behn, Feindt, Matz, Krause, Gohl

Publication FVV: OIL DILUTION FUEL-OIL-INTERACTION

The aim of the research cluster “Fuel in Oil” is the investigation and quantification of the interaction between the fuel and the lubrication oil caused by late post injections, which are applied for the regenerationof the particulate filter or the NOx storage catalyst. To achieve the objectives, different phenomena like the fuel entry into the lubrication film, the fuel-oil transport by means of the piston rings, the evaporation of fuel out of the oil pan and the impact of the oil separator of the oil dilution were…
2015, Seel, Geppert, Meister, Ehrly, Behn, Feindt, Bregar, Lyubarskyy, Oliva

Publication MTZ: Particles, Oil Emission, pre ignition

Modern downsizing in connection with the future more rigorous exhaust limit values for cars, commercial vehicles and off-highway applications, is a great challenge for internal combustion engine systems and components. In this context, increased oil emission leads to increased particle and HC emissions. Additionally, the efficiency of the exhaust gas aftertreatment and the pre-ignition…
2014, Hadler, Lensch-Franzen, Gohl, Mink

Publication MTZ: Oil consumption, dynamic, Diesel engines

The measurement of oil consumption and the investigation of oil consumption mechanisms in combustion engines are subject to various research projects. Methods like drain and weight, or such using tracers like radioactive substances, sulphur dioxide or pyrene are often too slow or insensitive for dynamic engine test cycles…
2013, Behn, Feindt, Krause, Matz

Publication MTZ: Oil emission transient testing

Optimisation of lube oil consumption in transient engine operation is gaining increasing attention from engine developers. Engine operation in extended stop-and-go phases can sporadically lead to unexpected oil consumption problems for inner-city driving.
2013, Frommer, Beeckmann, Freier, Künzel

Publication SIMEA: Oil emission, dynamic and static test

Exemplary results in this paper reveal that knowledge about steady-state LOC is one important element but not sufficient for further LOC reduction on modern engines. Besides the general influence of speed and load during steady-state operation LOC behavior is affected by dynamically induced LOC mechanisms, which can contribute significantly to overall LOC. As a result, optimum engine component development includes evaluation of LOC behavior for stedy-state and dynamic engine operation.
2012, Frommer, Beeckmann, Freier, Pierotti

Publication SAE: Mixture formation, Influence on oil emission

Partly competing objectives, as low fuel consumption, low friction, long oil maintenance rate, and at the same time lowest exhaust emissions have to be fulfilled. Diminishing resources, continuously reduced development periods, and shortened product cycles yield detailed knowledge about oil consumption mechanisms in combustion engines to be essential. There are different ways for the lubricating oil to enter the combustion chamber…
2010, Gohl, Brandt, Wittler, Budde, Krause, et al.