Fuel-increasing system for an engine

摘要

A method and device for increasing the amount of fuel to an engine during acceleration is provided. A secondary source of fuel in addition to a first source of fuel is introduced into the engine during acceleration. The secondary source of fuel is introduced through a secondary fuel delivery line which is opened by a valve actuated in response to throttle control movement. In a first embodiment, the secondary fuel delivery line communicates with a fuel delivery area from which fuel is supplied to the first fuel source. The valve is pressed open by the throttle control along with a primary fuel source needle valve control, allowing fuel from the fuel delivery area to flow through the second fuel line in addition to the first fuel source. In second and third embodiments, the secondary fuel line communicates with an excess fuel return line. A valve extends across the fuel return line and secondary fuel line. The valve is movable between a closed position in which the fuel return line is open and the secondary fuel line obscured, and an open position in which the fuel return line is blocked and fuel is diverted to the secondary fuel line. In the second embodiment, the valve is moved by a control rod connected to a rotatable linkage connected to the throttle control. In the third embodiment, the valve is opened by movement of a vacuum operated diaphragm device.