CPC F02B 19/1061 (2013.01) [F02B 19/12 (2013.01); F02B 19/16 (2013.01)] | 24 Claims |
1. A pre-combustion chamber assembly for a spark ignition engine, the assembly having: an ignition chamber adapted to contain at least one electrode of a spark generator; the ignition chamber being adapted to communicate with a main engine combustion chamber via a plurality of cylindrical pre-chamber ports; wherein the ignition chamber communicates for removal therefrom of exhaust gas residuals to a distinct storage chamber via at least one transfer port, wherein the ignition chamber includes a single substantially cylindrical entrance channel leading from said pre-chamber ports in a direction towards an ignition region of the ignition chamber, the ignition region having a larger cross-section than the entrance channel, and wherein the entrance channel and ignition region are joined by a flaring chamber connector wall; and wherein the ignition chamber includes a tumble feature adapted to promote flow tumble, and the tumble feature is located in the region of the flaring chamber wall.
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