MTZ industrial

, Volume 5, Issue 2, pp 26–31 | Cite as

Two-stroke Piston Rings for Reduced Oil Feed and Optimised Distribution

  • Richard Mittler
Cover Story Engine Components

Demands for efficiency and future emissions regulations in the two-stroke large engine sector are driving new developments in engines, components and systems. Federal-Mogul’s new piston ring concept reduces oil feed requirements and optimises oil distribution to avoid issues with excessive wear and corrosion.


One of the main goals of the marine industry’s strategy to meet future emissions requirements is the development of high efficiency long stroke, low speed, two-stroke engines. The fact that a reduction in carbon dioxide (CO2) emissions is in direct proportion to reductions in fuel consumption is fully recognised. However, there is also a major influence from the burnt and unburnt lubrication oil in the exhaust gases [1].

The main problem is already evident in current engine types. Their tribological characteristics must be capable of distributing the lube-oil on the cylinder liner wall so that the running surface of the piston rings can fulfil the demands of sealing,...


Circumferential Direction Piston Ring Cylinder Liner Bottom Dead Centre Piston Stroke 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. [1]
    Kristensen, H.O,: Energy Demand and Exhaust Gas Emissions of Marine Engine. Technical University of Denmark, September 2012Google Scholar
  2. [2]
    Stark, M.; Mittler, R.: Optimization of Tribodynamic Effects to Improve the Reduction Potential of Particulate Matter Concentrations in the Exhaust Gas of Large Two Stroke Marine Diesel Engines. SAE International, 2014Google Scholar
  3. [3]
    Christensen, O,: Cylinder Lubrication of Two-stroke Crosshead Marine Diesel Engines. In: Wärtsilä Technical Journal, 02/2010Google Scholar
  4. [4]
    Mittler, R.; Mierbach, A.; Richardson, D.: Understanding the Fundamentals of Piston Ring Axial Motion and Twist and The Effects on Blow-by. In: ICES2009-76080, May 2009Google Scholar
  5. [5]
    Mittler, R.: Detailed 3D Ring Pack Analysis. In: MTZ 71 (2010), No. 7/8Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden 2015

Authors and Affiliations

  • Richard Mittler
    • 1
  1. 1.Analysis and Product Development Technology Rings & LinersFederal-Mogul Burscheid GmbHBurscheidGermany

Personalised recommendations