Patent ID: 6216662
Filing Date: 2001-04-17
Classification: F02B,F02F,Y02T

Abstract:
A direct injection gasoline engine including at least one cylinder, said cylinder having an axis, a piston reciprocably mounted within said cylinder, said piston having a piston crown, a cylinder head closing said cylinder, a portion of said cylinder defined by said cylinder head and said piston constituting a combustion chamber, at least one inlet port adapted to cause swirl of inlet air in said cylinder substantially about said axis of said cylinder, said piston crown being provided with a recess which constitutes at least part of said combustion chamber, said recess having a floor and a side wall, a spark plug extending close to or into said recess, at the top dead centre position of said piston, at a position adjacent to said side wall of said recess and a fuel injector which is arranged to inject fuel into said recess and is situated adjacent said side wall of the recess, a portion of said side wall of said recess which is between said fuel injector and said spark plug being arcuate, when viewed in the direction of said axis of said cylinder, said floor of said recess adjacent the said portion of said side wall rising progressively towards said cylinder head over at least a part of the length of said portion of said side wall in the direction towards said spark plug.