Marine Diesel Engine Cooling Systems

Raw Water Cooling: A flexible impeller pump provides an efficient solution to most raw water pumping needs. The primary advantage of flexible impeller pumps is that they are self-priming, which means that when the vanes of the impeller are depressed and rebound, they create their own vacuum, drawing fluid into the pump. A dry pump can lift water up to as much as three meters. Thus a flexible impeller pump being used for engine cooling does not need to be manually primed or located below the water line. An added feature of a flexible...

Twin Spark Theory

Twin S park Theory Twin Spark Theory Twin Spark : Normal engines have one spark plug per cylinder. However, since decades ago, Alfa Romeo insisted on putting 2 spark plugs in each cylinder, firstly in its racers and now in its cars. As ignition takes place in two locations rather than one, this enable more efficient combustion and cleaner emission. However, besides Alfa, in the past 15 years only Mercedes and Porsche have ever...

New Engines For 2013

New Engines For 2013• Cat C-7 - 550HP• Cat 12.9 - 1000HP• New Cat 3126's• New Cummins 6.7 to 600HP• New Duramax's to 600HP  New Caterpillar and Cummins Engines for Marine use, Industrial use, Power Generation and Marine Propulsion. We also offer Remanufactured, Rebuilt & High Performance Diesels. We are a  Marine Diesel Specialist, providing up To 50 Knot Conversion Packages. Our custom machine work and fabrication services have been in operation since 1969...

Piston Ring Failure Analysis

A piston ring is a ring used in conjunction with a piston to seal an engine's combustion chamber and regulate oil use. Piston rings often experience wear due to a number of different factors. As such, it is important to know how to analyze piston ring failures. Scuffing Scuffing of the piston ring leads to wear on the ring face. Damage to the ring face can lead to a loss of ring control. When this occurs, it usually results in high base pressure, oil over-consumption and piston scoring. This can cause the piston to seize altogether. Causes Three...

Life of Junior Engineer on Ship

IMPORTANCE OF JUNIOR ENGINEER/5TH ENGINEER "Junior Engineer" is a very important rank with respect to the engine room. They are Engineers under training after completion of basic education for the sea service. The don't hold a "certificate of competency", (C.O.C), to become an "Officer In charge Of an Engineering Watch",(OOEW). They are under direct control of 2nd Engineers who is usually the operational/maintenance boss of the engine room. They are supposed to get training on operation/maintenance of various machineries under supervision...

hybrid turbocharger

A hybrid turbocharger is an electric turbocharger consisting of an ultra high speed turbine-generator and an ultra high speed electric aircompressor. The turbine and compressor are high-speed aeromachines, as in a conventional turbocharger. The electrical motors run at speeds in excess of 120,000 rpm and when used as generators, generate electricity at up to 98.5% electrical efficiency. High electrical efficiency is paramount,...

Homogeneous Charge Compression Ignition

What is HCCI? As stated above, the acronym means Homogeneous Charge Compression Ignition. Yes, yes, but what does that mean? What does it do? An HCCI engine is a mix of both conventional spark-ignition and diesel compression ignition technology. The blending of these two designs offers diesel-like high efficiency without the difficult--and expensive--to deal with NOx and particulate matter emissions. In its...

New, large-bore, marine engine development with high power density

. MAN Diesel has broadened its product portfolio with the development of its new, Type K80ME-C9 two-stroke, low-speed engine. The ME-C9 engine recently passed the final milestone on its way to commercial applications in the marine sector with a successful Type Approval Test (TAT).The first production version of the MAN B&W-branded engine successfully completed its TAT programme at Hyundai’s (HHI-EMD) works in Ulsan, Korea. HHI-EMD’s two-stroke...