Combustion chamber for direct injected engine

An internal combustion engine having a cylinder block, cylinder head assembly defining a cylinder bore closed at one end by a surface of the cylinder head portion of said cylinder block, cylinder head assembly, a piston reciprocating in said cylinder bore and forming a combustion chamber with said cylinder bore and said cylinder head surface, an intake passage arrangement extending from an inlet opening in an outer surface of said cylinder block, cylinder head assembly and serving said combustion chamber through an intake valve seat formed in said cylinder head surface, said intake valve seat lying substantially on one side of a first plane containing the axis of said cylinder bore and being intersected by a second plane also containing said cylinder bore axis and perpendicular to said first plane, a poppet type intake valve supported in cylinder head portion for controlling the opening and closing of said intake valve seat, an exhaust passage extending from an exhaust valve seat disposed in the cylinder head surface on the opposite side of said first plane from said intake valve seat and exiting the cylinder block, cylinder head assembly through an outlet opening formed in said cylinder head portion, a fuel injector mounted in said cylinder block, cylinder head assembly with a discharge port directed into the combustion chamber so as to spray in a direction generally parallel to the axis of the air flow charge through said intake passage arrangement, said fuel injector discharge port being intersected by said second plane, and control means for controlling the timing of injection of fuel from the fuel injector and wherein under low speed/low load conditions the injector begins its injection at a time when the piston is at the end of its compression stroke and under other running conditions the fuel injector begins its injection during the intake stroke.

An internal combustion engine having a cylinder block, cylinder head assembly defining a cylinder bore closed at one end by a surface of the cylinder head portion of said cylinder block, cylinder head assembly, a piston reciprocating in said cylinder bore and forming a combustion chamber with said cylinder bore and said cylinder head surface, a bowl formed in the head of said piston, the head of said piston having a dome part and said bowl extends at least in part into said piston dome part, an intake passage arrangement extending from an inlet opening in an outer surface of said cylinder block, cylinder head assembly and serving said combustion chamber through an intake valve seat formed in said cylinder head surface, said intake valve seat lying substantially on one side of a first plane containing the axis of said cylinder bore and being intersected by a second plane also containing said cylinder bore axis and perpendicular to said first plane, a poppet type intake valve supported in cylinder head portion for controlling the opening and closing of said intake valve seat, an exhaust passage extending from an exhaust valve seat disposed in the cylinder head surface on the opposite side of said first plane from said intake valve seat and exiting the cylinder block, cylinder head assembly through an outlet opening formed in said cylinder head portion, and a fuel injector mounted in said cylinder block, cylinder head assembly with a discharge port directed into the combustion chamber so as to spray in a direction generally parallel to the axis of the air flow charge through said intake passage arrangement, said fuel injector discharge port being intersected by said second plane.