Method and device for recirculating exhaust gas for a spark ignited 4-cycle engine

摘要

The procedure consists of circulating and guiding the recycled exhaust gases (EGR) in a peripheral zone (12) of at least one primary inlet duct (7) which simultaneously carried air. The recycled gases are then fed into a specific zone (13) of the combustion chamber (1) where a stratification is created, separating the air or fuel/air mixture from the recycled gases. The recycled gases are fed into the inlet duct in such a way that ther kinetic energy reinforces the movement of the gases in the combustion chamber. The cylinder's ignition plug (16) is situated close to its lengthwise axis, about which the gases in the cylinder's combustion gases are rotated in a tumbling motion. The recycled gas feed is controlled by a butterfly valve (11) with its axis (10) lying perpendicular to one of the inlet ducts.