Extrembelastungen im Pkw-Antriebsstrang durch Missbrauch

Automotive drivetrain model for transmission damage prediction

“…If an upshift or downshift decision occurs, the second part of the state-chart is activated (Figs. 41 and 42 in Appendix B). A distinction is done between the management of a start-up process, an upshift and a downshift.…”

“…Their properties vary essentially in terms of gradients and target speeds. These driving cycles do not consider effects such as the road slope or the occurrence of special events, which may have an impact on the transmission damage [41]. The drivetrain model can therefore be extended to specify such situations.…”

Online and real-time damage calculation in automotive transmissions Application to remaining service life estimation

“…For safety and robustness reasons, transmissions are nowadays conceived to endure severe driving behaviors and a multitude of worst-case or misuse scenarios, which typically represent sportive or extreme driving situations (2), (3). This means that their effective service life exceeds in general significantly the required minimum service life for the normal driver, and consequently, that they are overdesigned for a big part of the customers.…”

Online and real-time monitoring system for remaining service life estimation of automotive transmissions – Application to a manual transmission

“…These standardized customer load collectives are usually generated independently of driver styles or environmental conditions, so that the representation is unique [4]. Nevertheless, for lifetime and robustness issues, these profiles still consider safety factors to cover a multitude of worst-case or misuse scenarios, which typically represent sportive or extreme driving situations [5]. And even if the state of the art is to consider market-specific driving cycles able to represent more precisely the driver behaviors, the real damage processes under real driving conditions and for a particular driver are not known [6,7].…”