Fuel injection system

Claim 2

A fuel flow control system for internal combustion engines comprising an intake manifold having a length and a given internal diameter and adapted at one end for attachment to a said engine, valve means for controlling the flow of air through said intake manifold, injection nozzle means comprising a slender hollow cylindrical rod disposed within and positioned normal to the axis of said intake manifold, said rod having at least one bore positioned transverse thereto and axially of said intake manifold, for dispensing fuel into the air drawn through said intake manifold, a fuel line connected to said nozzle means, a flow control valve connected to said fuel line to meter the amount of fuel to pass through the line to said nozzle means, said valve comprising a movable valve member and means connected to said valve means for controlling the flow of air and to said valve member to increase the amount of fuel metered to said fuel line and said nozzle means as said valve means is moved to increase the air flow through said intake manifold, and pump means operative in response to air pressure fed thereto for pumping fuel into said flow control valve to be metered by said movable valve member to said nozzle means at a pressure responsive to internal pressures of said engine.

Claim 3

A fuel control system according to claim 1 wherein said pump means comprises a diaphgragm-type fuel pump adapted to be connected to and driven in response to changes in crank case pressure in said engine.

Claim 4

A fuel control system according to claim 1 wherein said cylindrical rod has a plurality of parallel bores therein spaced along said rod and positioned parallel to the axis of said intake manifold.

Claim 5

A fuel control system according to claim 1 wherein said pump means for pumping fuel to said injection nozzle means comprises a diaphragm-type fuel pump adapted to be driven in response to changes in internal pressure within said engine, and said system comprises means defining a flow restricting bypass line connected between said fuel pump and said valve means for maintaining a given pressure on said fuel to be injected into said nozzle means and affording a return line to a fuel reservoir for excess fuel.

Claim 6

A fuel injection control system for internal combustion engines having an intake manifold of a given internal diameter, said system comprising a nozzle extending into said intake manifold and positioned normal to the axis of said intake manifold, said nozzle comprising a tubular member having a restricted central bore extending therethrough and having a plurality of restricted bores positioned normal to said central bore and communicating between said central bore and the outer surface of said tubular member whereby the air entering said engine draws fuel from said bores and atomizes the fuel pumped thereto, a fuel pump for pumping fuel from a reservoir into a fuel line at a pressure less than 6 pounds gauge, a fuel line connected to said nozzle and said fuel pump, flow control valve means disposed in said fuel line between said fuel pump and said nozzle for metering fuel directed from said pump to said nozzle, air intake metering means disposed in said inTake manifold for controlling the amount of air to pass through said intake manifold to said engine, and means connecting said flow control valve means and said air intake metering means to increase said quantity of fuel metered to said nozzle when said air intake metering means is moved to increase the quantity of air permitted to pass through said intake manifold to said engine.

Claim 7

A fuel injection control system for internal combustion engines having an intake manifold of a given internal diameter, said system comprising a nozzle extending into said intake manifold and positioned normal to the axis of said intake manifold, said nozzle comprising a tubular member having a restricted central bore extending therethrough and having a plurality of restricted bores positioned normal to said central bore and communicating between said central bore and the outer surface of said tubular member whereby the air entering said engine draws fuel from said bores and atomizes the fuel pumped thereto, a fuel pump for pumping fuel from a reservoir into a fuel line at a pressure less than 6 pounds gauge, a fuel line connected to said nozzle and said fuel pump, flow control valve means disposed in said fuel line between said fuel pump and said nozzle for metering fuel directed from said pump to said nozzle, air intake metering means disposed in said inTake manifold for controlling the amount of air to pass through said intake manifold to said engine, and means connecting said flow control valve means and said air intake metering means to increase said quantity of fuel metered to said nozzle when said air intake metering means is moved to increase the quantity of air permitted to pass through said intake manifold to said engine.

Claim 8

A fuel injection control system according to claim 5 wherein said nozzle has an external diameter of about 1/4 inch and said central bore and said transverse bores have a diameter of between 0.010 to 0.090 inch.

Claim 9

A fuel injection control system according to claim 5 wherein said system comprises means defining a restricted bypass between said pump and said flow control valve means to direct excess fuel pumped to said flow control valve means back to a fuel tank.

Claim 10

A fuel control system according to claim 7 wherein said restricted bores and said restriction in said restricted bypass means have equivalent diameters of between 0.010 and 0.090 inch.

Claim 11

A fuel control system according to claim 5 wherein said pump will deliver fuel at a pressure between 2 and 6 pounds gauge.