Fuel metering and vaporizing system for internal combustion engines

A charge forming system for automatically providing a charge of the optimum fuel-to-air ratio to an internal combustion engine having intake and exhaust manifolds over a broad range of operation, comprising:

• manually displaceable means for affording operator control of engine operation;
• air throttle means coupled to said manually displaceable means;
• transducer means adapted to be coupled to the engine for providing a manifestation of developed engine power;
• air flow control means coupled to said means for providing and to said air throttle means and responsive to said manifestation of developed engine power for progressively increasing the net throttle opening in response to a manifested increase in engine power until the power developed by the engine ceases to increase;
• fuel vaporizing means adapted to be disposed in heat transfer relationship to the exhaust manifold of the engine and having an outlet coupled to the intake manifold of the engine;
• and
• means for supplying liquid fuel to said fuel vaporizing means.

A charge forming system for continuously and automatically optimizIng the charge supplied to an internal combustion engine, comprising:

• means for providing a manifestation of developed engine power;
• regulating means for controlling the flow of fuel and air to the engine, said regulating means being coupled to said means for providing to progressively lower the fuel-to-air ratio of the charge ingested by the engine in response to a manifested increase in developed engine power until a cessation of the increase is effected;
• vaporizing means coupled to said regulating means and operative to vaporize liquid fuel outputted by said regulating means and to supply the vaporized fuel to the engine;
• and
• fuel injector means coupled to said regulating means and operative to supply separate charges of fuel to ones of the cylinders of the engine.

A charge forming system for a spark-ignited internal combustion engine having a throttle, comprising:

• a manual control linkage adapted to be coupled to a foot pedal;
• a liquid fuel flow regulator adapted to be coupled to said manual control linkage;
• a throttle linkage for coupling said manual control linkage to the throttle of the engine;
• an air servo connected to said throttle linkage for varying the position of the throttle;
• means for applying a manifestation of developed engine power to said liquid fuel flow regulator and to said air servo;
• said liquid fuel flow regulator and said air servo comprising means responsive to an applied manifestation of an increase in developed engine power for continuously diminishing the fuel-to-air ratio of the charge formed thereby until the manifested, developed engine power ceases to increase;
• means for accepting liquid fuel from said liquid fuel flow regulator and transferring heat energy thereto for vaporizing the fuel;
• and
• a distribution conduit for transferring vaporized fuel from said last-named means to the engine.

A charge forming system for an internal combustion engine, comprising:

• manually displaceable means for affording operator control of engine operation;
• means for providing a manifestation of changes in developed engine power;
• fuel flow control means coupled to said means for providing and to said manually displaceable means and responsive to a manifested change in developed engine power for progressively changing the fuel-to-air ratio of the charge admitted to the engine until said manifested change in engine power is caused to cease;
• and
• fuel vaporizing means adapted to be coupled in heat transfer relation to the engine and in fluid transfer relation to said fuel flow control means for vaporizing liquid fuel.