Evaporative charge forming system incorporating air cooling means

A charge forming system including a closed chamber, an evaporative liquid fuel supply means for maintaining a predetermined general level of liquid fuel in said chamber, said chamber including an engine induction air inlet opening thereinto below said level and an induction air outlet opening outwardly of said chamber from a level above said liquid level, duct means including an inlet portion communicated with said outlet and an outlet end for communication with the induction passages of a combustion engine, water drain means opening outwardly from a lower portion of said chamber, electrically operated valve means operatively connected with said water drain means for controlling the flow of liquid through said water drain means, electrically actuated water sensing probe means in the lower portion of said chamber and electrically connected to said valve means for opening the latter in response to a collection of water in the lower portion of said chamber up to the level of said water sensing probe means, said electrically operated valve means being spring biased to the closed position and electrically operable to the open position, low fuel level sensing means operatively associated with said chamber for actuating signal means responsive to a predetermined drop of fuel level in said chamber below said liquid level, ignition circuit interrupting switch means operatively associated with said low fuel level sensing means for interrupting an ignition circuit responsive to a further drop of fuel level in said chamber in excess of said predetermined drop.

A charge forming system including a closed chamber, an evaporative liquid fuel supply means for maintaining a predetermined general level of liquid fuel in said chamber, said chamber including an engine induction air inlet opening thereinto below said level and an induction air outlet opening outwardly of said chamber from a level above said liquid level, duct means including an inlet portion communicated with said outlet and an outlet end for communication with the induction passages of a combustion engine, said induction air inlet defining an elongated inlet duct including an inlet end and an outlet end, said outlet opening into said chamber below said lever, said inlet end having air cleaner means operatively associated therewith, said induction air outlet defining an outlet duct having an inlet end and an outlet end, said outlet duct inlet end opening into said chamber at a level above said liquid level, and an induction air by-pass duct communicating said inlet duct, between the inlet and outlet ends thereof, with said outlet duct between the inlet and outlet ends thereof, variable airflow controlling valve means operatively associated with said by-pass duct for controlling the flow of by-pass air therethrough, said engine induction air inlet opening downwardly within said chamber below said level of liquid fuel and defining a lower end downwardly opening seat, a buoyant valve member operatively supported from said induction air inlet and upwardly displaceable against said seat by the buoyant force of liquid fuel thereon responsive to termination of the inflow of induction air through said induction air inlet, outlet duct including gas flow valve means shiftable between full open and full closed positions, said gas flow valve means including an electrically controlled operator for closing said gas flow valve means responsive to an associated engine ignition circuit being opened.