INTERNAL COMBUSTION ENGINE'AND CYLINDER HEAD THEREFOR

摘要

An internal combustion engine has a cylinder head (2) with a cardiodal recess (3) with inlet and outlet apertures (8, 12) in which inlet and outlet valves (9, 13) are positioned. A cusp (14) extending between the apertures (8, 12) imparts a swirling motion to gases entering the recess through the inlet aperture (8), but extends only about one third of the travel of the inlet valve (9) so that it does not impede the flow of gases when the inlet valve is fully open.