Injector cooling for direct injected engine

A direct injected internal combustion engine having a cylinder block defining a cylinder bore having a cylinder bore axis, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore at one end of said piston, said cylinder head, said piston, and said cylinder bore forming a combustion chamber, an intake passage arrangement formed in said cylinder head on one side of a plane containing said cylinder bore axis, a spark plug mounted in said cylinder head with its spark gap disposed contiguous to the cylinder bore axis, a fuel injector mounted in a fuel injector opening in said cylinder head contiguous to said intake passage arrangement and disposed at an angle so as to spray into said combustion chamber, said cylinder head fuel injector opening having a first smaller diameter portion extending from said combustion chamber toward an outer surface of said cylinder head that receives an injector nozzle portion of said fuel injector and a larger diameter portion that extends outwardly to said cylinder head outer surface that receives a main body portion of said fuel injector, a fuel injector water jacket formed in said cylinder head and having a first part disposed beneath said fuel injector opening and a second part extending upwardly on at least one side of said fuel injector opening so as to at least partially encircle said fuel injector for cooling of said fuel injector, and a water delivery passage extending beneath said smaller diameter portion of said fuel injector opening to said fuel injector water jacket for supplying cooling water thereto.

A direct injected internal combustion engine having a cylinder block defining a cylinder bore having a cylinder bore axis, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore at one end of said piston, said cylinder head, said piston, and said cylinder bore forming a combustion chamber, an intake passage arrangement formed in said cylinder head on one side of a plane containing said cylinder bore axis serving said combustion chamber through at least a pair of intake valve seats formed in the cylinder head with their centers being positioned on the one side of the plane containing the axis of the cylinder bore, a spark plug mounted in said cylinder head with its spark gap disposed contiguous to the cylinder bore axis, a fuel injector mounted in a fuel injector opening in said cylinder head contiguous to said intake passage arrangement and disposed at an angle so as to spray into said combustion chamber, a fuel injector water jacket formed in said cylinder head and having a first part disposed beneath said fuel injector opening and a second part disposed at one side of first part and extending upwardly along at least one side of said fuel injector opening so as to extend beneath and along at least one side of said fuel injector for cooling of said fuel injector and a pair of exhaust valve seats formed in said cylinder head on the other side of said plane containing said cylinder bore axis and an exhaust passage arrangement cooperating with said exhaust valve seats for discharging combustion products from the combustion chamber.

A direct injected internal combustion engine having a cylinder block defining a cylinder bore having a cylinder bore axis, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore at one end of said piston, said cylinder head, said piston, and said cylinder bore forming a combustion chamber, an intake passage arrangement formed in said cylinder head on one side of a plane containing said cylinder bore axis and serving said combustion chamber through at least a pair of intake valve seats formed in said cylinder head with their centers being positioned on the one side of said plane containing the axis of the cylinder bore, a pair of exhaust valve seats formed in said cylinder head on the other side of said plane containing said cylinder bore axis and an exhaust passage arrangement cooperating with said exhaust valve seats for discharging combustion products from the combustion chamber, a spark plug mounted in said cylinder head with its spark gap disposed contiguous to said cylinder bore axis, a fuel injector mounted in a fuel injector opening in said cylinder head between said intake valve seats and contiguous to said intake passage arrangement and disposed at an angle so as to spray into said combustion chamber, said intake passage arrangement being Siamesed and said fuel injector lying at least in part beneath a common portion of said intake passage arrangement, and a fuel injector water jacket formed in said cylinder head and having a first part disposed beneath said fuel injector opening and a second part extending upwardly on at least one side of said fuel injector opening so as to at least partially encircle said fuel injector for cooling of said fuel injector.

A direct injected internal combustion engine having a cylinder block defining a cylinder bore having a cylinder bore axis, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore at one end of said piston, said cylinder head, said piston, and said cylinder bore forming a combustion chamber, an intake passage arrangement formed in said cylinder head on one side of a plane containing said cylinder bore axis comprising a pair of intake passages extending from a common inlet through one side of the cylinder head and terminating at a pair of intake valve seats, said intake passages having an angularly inclined straight portion extending toward the valves seats and terminating in a curved portion that joins them with the valve seats, a spark plug mounted in said cylinder head with its spark gap disposed contiguous to said cylinder bore axis, a fuel injector mounted in a fuel injector opening in said cylinder head between said intake valve seats and contiguous to said intake passage arrangement and disposed at an angle so as to stray into said combustion chamber, said fuel injector having an axis that is generally parallel to a main flow axis of said intake passage arrangement, and a fuel injector water jacket formed in said cylinder head and having a first part disposed beneath said fuel injector opening and a second part extending upwardly on at least one side of said fuel injector opening so as to at least partially encircle said fuel injector for cooling of said fuel injector.