Low mass, low friction and low compression height pistons are vital in order to sustain the drive to obtain utmost fuel economy and design refinement in reciprocating piston engines.
Much has already been done and a further step forward in the attainment of the objectives is the introduction of a fully durable two ring piston.
Developments at Hepworth and Grandage have led to a successful design which meets the present requirements of engine manufacturers in terms of performance and durability and has the potential to reduce weight and compression height and probably to reduce friction.
The compression ring of the two ring piston system can be used with advantage as the top compression ring of an orthodox three ring piston.
