Study Materials for MARINERS™

ENGINE NOMENCLATURE There has been too much ambiguity with regards to the notations used for Marine Diesel Engines. One can consult the engine manual and find out what such notations means. However, this article will provide explanation for all Notations used by MAN B&W engines till date. What has been collected will continuously be updated whenever there is a change or a new addition to the notations. MAN – Germany – Maschinenfabrik Augsburg Nurnberg, B&W – Denmark – Burmeister & Wain Motorfabrik A/S The merger of above two Giants is now known as Man B&W. Now, with some examples of engine name plate details and specifications, we will understand these notations. From the 1960s to present. MAN B&W ENGINE Specifications: 774VT2BF(S) 7 – Number of cylinders 74 – Cylinder diameter in cm V – Single acting 2-stroke T – Cross Head 2B – Degree of Turbocharging F – Marine applicationS – Stationary Application 7K74EF 7 – Number of cylinders K – Two stroke cross head 74 – Cylinder diameter in cm E/G – Engine model/Hydraulically Operated Exhaust Valve F – Marine application 7L80GFCA 7 – Number of cylinders L – Long stroke 80 – Cylinder diameter in cm G – Engine model/Hydraulically Operated Exhaust Valve F – Marine Application C – Constant pressure turbocharging A – Engine rating 7L80GB/E 7 – Number of cylinders L – Long stroke 80 – Cylinder diameter in cm G – Engine Model/Hydraulically Operated Exhaust Valve B – Engine rating E – Economy layout 7S80MC 7 – Number of cylindersS – Super long stroke80 – Cylinder Diameter in cmMC – Engine model/Programme 6K90MC-C/S 6 – Number of cylinders K – Two stroke cross head 90 – Cylinder diameter in cm MC – Engine model/Programme- C – Short stroke container ship application- S – Stationary Application 5L60MC MK-5 5- Number of cylinders L – Long stroke 60 - Diameter of cylinder in cm MC – Engine Programme MK 5 – Engine version/Mark Number 6S90ME-C 9 GI TII 6 – Number of cylinders S – Stroke/bore ratio – (G – ‘Green’ Ultra long stroke, S – Super long stroke, L – Long stroke, K – short stroke) 90 – Diameter of the Cylinder in mm M – Engine programme series E – Concept – (E – Electronically controlled, C – Camshaft controlled) C – Design – (E – Exhaust valve controlled by camshaft, C – Compact engine) 9 – Mark NumberGI – Fuel injection concept – (“blank” – Fuel oil only, GI – Gas injection)TII – Emission regulation – (TII – IMO Tier level) Stroke/ Bore ratio: K – Short stroke (approximately ratio = 2.8) L – Long stroke (approximately ratio = 3.2) S – Super long stroke (approximately ratio = 3.8) G – Ultra long stroke (approximately ratio = 4.7) 👆🏻forwarded as received