Temperature Scuffing Effect on Piston Working

Temperature Scuffing Effect on Piston Working Points : temperature scuffing effect on piston working, piston problems, problems in internal combustion engines, ic, engine The ordinary aluminum alloy piston ‘are more liable to wear and ‘scuffing’ action than coast iron one, so that in more recent models the cylindrical surfaces have been given a protective coating of aluminum oxide or tin.

When tin is used as coating it not only prevents “scuffing” or partial seizure during the running in period of the engine but also forms a highly polished bearing surface of low frictional resistance.

The tin coating of pistons when new is now more widely used, as it has proved an effective preventative of scuffing and seizure during the running in stages.

Worn piston rings or cylinders result in blow-by, blue gray engine smoke, low engine power spark plug fouling and other problems caused by poor ring sealing. ‘Gumming’ of piston rings may occur if cheap lubricants are used.

The principal requirement of a piston ring is that when compressed into the cylinder shall bear evenly all around, and shall not have too large a gap to permit blow-by.