Gaseous fuel delivery system

摘要

A gaseous fuel delivery system for a gasoline engine having a gaseous fuel delivery valve means comprising an idle fuel delivery valve and an acceleration fuel delivery valve. Means responsive to air flow through the carburetor throat controls operation of the idle fuel delivery valve. Means responsive to intake manifold vacuum controls operation of the acceleration fuel delivery valve. Electrically operable alternately open idle and acceleration solenoid valves are interposed in separate delivery conduits from the idle and acceleration fuel delivery valves. Means responsive to the opening of the acceleration fuel delivery valve opens the acceleration solenoid valve and closes the idle solenoid valve, reversing the respective valve positions on closing of the acceleration fuel delivery valve. An idle switch responsive to idle position of the throttle prevents opening of the idle solenoid valve except when the throttle is in the idle position. The engine carburetor is arranged such that no gasoline is delivered for idle operation. Idle needle valves are closed, or eliminated. Transition slots are sized to be operational only as the throttle moves from the idle position and supply no fuel when the throttle is at idle.