In order to satisfy emission standards and CO2 targets, spark-ignition engines are designed
to operate with high dilution rates, compression ratios and boost levels, thus increasing the …

This work presents a methodology for using machine learning (ML) techniques in
combination with 3D computational fluid dynamics (CFD) modeling to optimize the cold-start …

This work studies the cyclic variability otherwise cycle-by-cycle variations (CCV) of
performance, combustion, and nitric oxide (NO) and carbon monoxide (CO) emissions in an …

In this work the influence of hydrogen blending of gasoline in a spark ignition engine is
surveyed by means of quasi-dimensional simulations. Cycle-to-cycle variations greatly affect …

Turbulent burning rates were measured in an spark-ignition engine with extensive optical
access for a fairly wide range of operating conditions. Skip-fired operation was employed to …

Blowby and gas flow through the cylinder–piston–ring crevices are phenomena that affect
the engine performance and exhaust emissions. Also these phenomena influence the …

Knocking limits the performance and efficiency of highly compressed, downsized spark
ignition combustion engines. In this paper, the effect of the first-stage ignition on knock is …

For a reliable and accurate simulation of SI engines reproduction of their operation limits
(misfiring and knock limit) and in this context the knowledge of cyclic combustion variations …

In dieser Arbeit wird ein phänomenologisches Zyklenschwankungsmodell zur Wiedergabe
der ottomotorischen Zyklenschwankungen vorgestellt. Die Untersuchungen ergaben zwei …

This paper presents experimental results and a new computational model that investigate
cycle to cycle variations (CCV) in a spark ignition (SI) engine. An established stochastic …