auxiliary engines, diesel generators
Operational experience has shown that 4 stroke engines operating heavy fuels being bunkered from various ports globally and low load operation of the engine tend to cause fouling of the turbocharger. The condition and cleanness of the turbine of an exhaust -gas turbocharger have a decisive influence on the efficiency, the performance of the combustion…
Every ship’s engine room is equipped with some kind of diesel engine and most big ships nowadays are powered by two-stroke diesel engines, although the usage of four-stroke engines for propulsion is increasing due to the flexibility in where they may be installed and the enhanced redundancy that a larger number of smaller engines can…
At all engine loads, the purpose of the diesel engine fuel system is to deliver the correct amount of fuel, at the correct time, to the correct cylinder in the required condition and as a result, the system must be capable of controlling the quantity, timing, period, and sequence of delivery. There must also be control…
This is another on-demand post and its purpose is to explain the 4-stroke lubrication system from operational point of view. All running gear of the 4-stroke engine is forced lubricated by an engine-driven gear type pump which takes the oil from the engine sump tank. The same oil from engine sump tank is also provided…
The emergency diesel generator is a self contained diesel engine driven electrical generator set, which is located in a separated room with access from deck. Usually the generator is the self-excited, brushless type and can be set for manual or automatic operation. Auto will be normally selected, with the manual setting being used for testing…
Crankshaft is the main element of the motor mechanism and it sums up the rotational motion of all cylinders and transmits it to the consumers, which in the case of marine engine systems can be a propeller or a generator. For this reason, from a mechanical point of view, it has the higher load and…
Regular engine performance test helps in evaluating the current condition of engine and optimizing engine performance. Performance test of engines will also help in identifying drop in its performance due to any deteriorating condition related to exhaust valve, fuel injector etc. If possible, the engine cylinder balance must be checked as often as possible. Measurements…
A while ago we have experienced frequent black outs due one of the vessel’s generators trip while running on load. The generator used to trip if load went more than 50 % while was running as a single generator and especially when a large consumer starts when the generator was close to 50 % load….
In the engine the valves are in control of air intake and exhaust gases flow. With time and continuous work of the engine the valve clearances are changed due vibrations, failure of springs and securing nuts and bolts or due to wear of valve and seats. Wear of the valve gear tend to increase the…
The idea of this post came from one of my followers, which contact me and ask for my advice and opinion with regard to one of his generator’s ACB “non close” alarm. An alternative current power generating system comprises of a number of diesel generators, which transform diesel engine’s mechanical energy into electrical energy. Generally,…