VTA technology now standard on TCA turbos for MAN 51/60 engines

Written by Nick Blenkey
Image of turbocharger

MAN’s VTA turbocharger

MAN Energy Solutions reports that VTA (Variable Turbine Area) technology is now standard on TCA turbochargers for its MAN 51/60 engine type.

This is the first time that VTA has been approved as standard for a large-bore MAN four-stroke engine and making MAN the only turbocharger manufacturer to offer axial turbochargers with VTA as standard for any large-bore, four-stroke engines.

“High-tech solutions are necessary to meet the market’s demanding requirements and – with this announcement – we have really delivered,” says Stefan Terbeck, Project Manager for the MAN 51/60 engine series at MAN Energy Solutions. “VTA turbochargers are becoming more and more important, especially when it comes to gas engines. VTA has already been applied by our licensee, Kawasaki Heavy Industries, which has reported excellent performance and high reliability on its engines..”

MAN Energy Solutions already has more than 380 references for turbochargers sold with VTA technology, with VTA is approved for its TCA turbocharger sizes TCA55 to TCA88 – both for marine and power applications.

“We collected more than seven years of operational experience before approving VTA technology as standard,” adds Terbeck. “As a result, our 51/60DF engine is getting a proven, field-tested product.”


The VTA technology means that the volume of charge air can be precisely matched to the quantity of injected fuel at all points in an engine’s load and speed range. This has several benefits, including:

  • significant fuel savings
  • improved dynamic performance
  • fuel flexibility: smart control management means that the engine adapts itself automatically to get to best possible operating point
  • range extension: it includes elevated ambient temperature without de-rating
  • peaking balance: handles load fluctuations.

MAN Energy Solutions reports that the typical payback period for VTA on MAN engines will be one-and-a-half to two years, and that its next step will be to make VTA standard for its MAN 51/60G engine type.

MAN’s PrimeServ Academy has already increased its VTA training portfolio due to the growing importance of the technology.

VTA: nozzle ring with adjustable vanes, closed on the left, open on the right
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