Anti-pollution engine head construction

摘要

An anti-pollution head construction for internal combustion engines is disclosed in which a storage chamber is formed in the head adjacent the spark plug opening, said storage chamber being in constant communication with the cylinder chamber by passages contained in the head. The storage chamber receives unburnt hydrocarbons during the compression stroke of the engine and returns the unburnt hydrocarbons to the cylinder chamber during the subsequent expansion stroke following combustion. The hydrocarbons mix with the oxides of nitrogen at a temperature of at least 2200 DEG Rankine, thereby reducing the oxides of nitrogen to the equilibrium value. Preferably the storage chamber is annular and is arranged concentrically about the spark plug opening.