Abstract
With paper SAE 980262 [1] part I of an investigation of seven WFT-systems was presented. After a general evaluation two systems were compared in more detail. This paper (based on SAE 1999-01-1037 [2]) reports on part II of the investigation. Results of additional investigations during 1999 on the thermal stability and the durability evaluation were included here as well. The general evaluation of present systems on the market is updated and refined including new systems and updated versions. Thus an unique and quick overview is provided mirroring the present status of WFT technology. RWD the new system of Kistler is evaluated based on a separate investigation by MPA Stuttgart.