Published 24/10/2022
•The principle of gap filler gaskets has already been applied to several production and research engines
•The basic idea is applicable to all X-DF engines with the main focus to reduce methane slip without big effort or downsides
•One or more so called gap filler gaskets are inserted between liner and cylinder cover, depending on engine type design
•They are located near the actual sealing gasket, but they are thinner than it to avoid induction of stress into the liner in undesired positions
•Designs that completely block of the volume via a flexible gap filler gasket design, i.e. by using a comb-like pattern or similar, are also possible
•The main benefit of this solution is methane slip reduction by reduction of crevice volume
•The driving effect is the gap filler gaskets taking up space that could otherwise be occupied by air/fuel mixture.
•It is known that air/fuel mixture in the crevice burns only to a certain extent. It may not burn at all. The amount of air/fuel mixture burned in the crevice depends on many factors such as charge motion, global and local air/fuel ratio and so on. By closing of this volume, the amount of unburned fuel is reduced.
Exemplary Arrangement
Dual Gas Filler Gaskets