Another contribution of the RT-flex system to fuel economy cited
by Wärtsilä is the capability to easily adapt the injection timing to
various fuel properties influencing poor combustion behaviour. Variable
injection timing (VIT) over load has been a traditional feature of
Sulzer low speed engines for many years, using a mechanical
arrangement primarily to keep the cylinder pressure high for the
upper load range. This is much easier to arrange in an electronicallycontrolled
engine