Fuel injection system for two-cycle engine

A direct fuel injection system comprised of a cylinder bore, a piston reciprocating in the cylinder bore, and a cylinder head affixed to the cylinder bore and closing the cylinder bore to form a combustion chamber, a spark plug having a spark gap mounted in said cylinder head and extending into said combustion chamber, and a fuel injector supported in said cylinder head to one side of said spark plug and spraying fuel into said combustion chamber in a direction generally transverse to said spark plug, said fuel injector having a first spray port directed toward said spark plug gap and at least two other spray ports directed in an area in said combustion chamber spaced from said spark gap, said other spray ports spraying into different vertical positions within said combustion chamber.

A direct fuel injection system comprised of a cylinder bore, a piston reciprocating in the cylinder bore, and a cylinder head affixed to the cylinder bore and closing the cylinder bore to form a combustion chamber, said cylinder head having a recessed lower surface, a spark plug mounted in said cylinder head and having a spark gap extending into said recess, and a fuel injector supported in said cylinder head recess to one side of said spark plug and spraying fuel into said combustion chamber in a direction generally transverse to said spark plug, said fuel injector having a first spray port directed toward said spark plug gap and at least two other spray ports directed in an area in said combustion chamber spaced from said spark gap, and a scavenge port formed in said cylinder bore diametrically opposite the direction of spray from the fuel injector.

A direct fuel injection system for an internal combustion engine having a combustion chamber defined by a piston, a cylinder bore in which said piston reciprocates and a cylinder head affixed and closing one end of said cylinder bore and defining a recess above said piston, a fuel injector for spraying fuel into said cylinder head recess for establishing a stoichiometric mixture at the gap of said spark plug at the time said spark plug is fired and a richer than stoichiometric mixture below said spark plug gap and above the head of said piston, the volume of said combustion chamber below said richer than stoichiometric mixture being greater than the volume above and containing the richer than stoichiometric mixture and being charged with substantially pure air.

An internal combustion engine having a combustion chamber and an induction system for supplying at least an air charge to said combustion chamber including a manually operated throttle valve, means for delivering a fuel charge to said combustion chamber in proportion to the position of said manually operated throttle valve, and means for introducing excess air into said combustion chamber in response to certain engine operating conditions comprising a further intake passage for serving said combustion chamber having an automatically positioned throttle valve therein, said automatically operated throttle valve being operated by a servomotor in response to the certain engine operating conditions, and a linkage means for interconnecting said manually positioned throttle valve with said automatically positioned throttle valve for limiting the degree of opening of the automatically positioned throttle valve in response to the position of said manually positioned throttle valve and for effecting opening movement of said automatically operated throttle valve when said manually operated throttle valve is opened more than a predetermined degree.

An induction system for an internal combustion engine comprised of a first intake passage, a manually operated throttle valve positioned in said first intake passage for controlling the flow therethrough, a second intake passage, an automatically positioned throttle valve positioned in said second intake passage for controlling the flow therethrough, and a servomotor for operating said automatically positioned throttle valve in response to an engine condition and a linkage means for interconnecting the manually positioned throttle valve with the automatically positioned throttle valve for limiting the degree of opening of the automatically positioned throttle valve in response to the position of the manually positioned throttle valve and for effecting opening movement of said automatically operated throttle valve when said manually operated throttle valve is opened more than a predetermined degree.