would be required in order not to exceed the maximum value for the ignition
pressure in the load range of approx. 80-100% MCR. This can be avoided
by opening the VTA from 75% MCR onwards.
MCR Maximum Continuous Rating
Figure 3: Turbocharger efficiencies with TCA55-21V on 6S46MC-C engine
In the diagram Turbocharger efficiencies with TCA55-21V on 6S46MC-C
engine, the efficiency characteristic of the VTA rating is plotted with the exist-
ing specification optimized for full load. With a closing nozzle ring, a marked
increase in the efficiency can be seen below 85% MCR.
In this case, the margin to the required efficiency rating has been used for
extreme optimization of the partial load performance. The difference between
the specification with and without VTA is thus extremely positive at partial
load and negative at full load – but still meeting all requirements.
Increased
turbocharger efficiency
2013-12-04 - de
1 Adjustable turbine nozzle ring (VTA)
1.2 Application Examples
MAN Diesel & Turbo
1
EN-US
9 (38)
To Next Page
Loading...
Need help?
General