Christian Krüger

TL;DR: In this paper, an experimental investigation with transparent 1-and 6-hole nozzles in real size geometries under high pressure conditions is described, and a comparison between a needle lift controlled (CR = common rail) and a pressure controlled (PLN = pump line) injection system is made.

TL;DR: In this article, mutual interactions of in-cylinder charge motion and spray deformation from multiple injector-driven direct injection spark-ignition engines were investigated, and significant spray-induced vortices perturbing the tumble flow were detected.

TL;DR: In this paper, an internal combustion engine with a fuel injection device with an injection nozzle having a nozzle needle and a plurality of injection bores is described, where the injection bore is arranged in at least two different separately activatable rows of holes, an operating stroke of the nozzle needle being set by control unit as a function of a piston position and/or an operating point of the engine.

TL;DR: In this article, a triple injection scheme was applied late during compression to generate stratified fuel/air mixtures, which caused cycle-to-cycle variations in the spray shape.

TL;DR: In this article, the impact of geometric variation of the intake port on in-cylinder flow and spray interactions was investigated, focusing on the second injection, since it provides ignitable mixtures at the time of ignition and is subject to strong fluctuations, rather than the first injection, which is very reproducible.