Sealing Rings for Wet Cylinder Liners

Abstract

It is vital to the performance of an engine that sealing rings fitted to wet cylinder liners should effectively prevent the leakage of coolant into the crankcase, prevent lubricating oil entering the coolant circuit and at the same time avoid distortion of the cylinder liner.

The sealing effect of the ring is due entirely to the pressure it exerts against the cylinder liner by virtue of its own elasticity. The effect of rubber hardness and compression upon wall pressure is investigated and proposals made for suitable standards. Design recommendations are proposed and a specification is laid down for material which will give satisfactory performance under arduous conditions.