In this article,I have added why auxillary engine not loaded instantaneously ?
It is advised to load the auxillary engine slowly.The reason behind it is that sudden loading cause overheating.
As there is line contact between the cylinder liner and skirt which is machined to give an arc of 90 ° extending over the full depth of the skirt.
When the auxillary engine loaded suddenly,side thrust increases and temperature of the piston skirt increases in the way of contact area and the arc changes and if this arc is insufficient then contact area decreases and thus overheating occur.
How to avoid this problem ?
- To avoid this problem in diesel engine,skirts are made up of aluminum-silicon .
- Skirt of engine is made taper in shape with thicker sections at top and lower parts.
- Friction coating is also used in skirt.