Einlassseitige Ventilhubstrategien zur Turbulenzgenerierung

Voltage rise anemometry in turbulent flows applied to internal combustion engines

“…It seems like there was almost no measurable spark deflection and hence, no measurable air flow. This measurement confirmed the extreme reduction of in-cylinder charge motion with an EIVC strategy; see also Scheidt et al (2014) or Riess et al (2013). In general, magnitude and trend of the graphs assigned to the specific intake configurations were comparable to results of other measurement and simulation results of before mentioned literature.…”

“…It seems like there was almost no measurable spark deflection and hence, no measurable air flow. This measurement confirmed the extreme reduction of in-cylinder charge motion with an EIVC strategy; see alsoScheidt et al (2014) orRiess et al (2013).…”

“…At the end of compression, the decay process of the tumble flow leads to an increase of turbulent kinetic energy (TKE). This effect supports flame kernel growing right after ignition as well as a fast burn-through of the whole charge (Riess et al 2013;Merker and Teichmann 2018).…”

“…This brings large benefits due to dethrottling at part load and lower knock tendency at high load due to reduced effective compression, which is well-known as the Miller-Cycle (Merker and Teichmann 2018). However, a major drawback of this EIVC strategy is the reduced charge motion (Riess et al 2013). Detailed knowledge about incylinder flow turbulence is essential to improve those concepts, and also in general for further engine development.…”