GB475361A - Improvements in or relating to fuel vapourising systems for internal combustion engines - Google Patents

Abstract

475,361. Vaporizers; refrigerating. ELECTROLUX, Ltd. May 15, 1936, No. 13864. Convention date, May 16, 1935. [Classes 7 (ii) and 7 (iii)] [Also in Group XIII] A vaporizing system connected to the suction intake of an engine driven by liquid fuel comprises an evaporator wherein liquid fuel vaporizes with the production of useful cold, means to utilize the cold thus produced, an air-fuel vapour heat-exchanger disposed between the evaporator and a vaporizing or atomizing device interposed between the heatexchanger and the intake to vaporize fuel not vaporized at the temperature of the heatexchanger. A carburetter 13 draws its air supply through passages 12, 11 and narrow passages 9 in a heat-exchanger 8 through which the combustible mixture flows to the engine after having traversed an evaporator 14. The cold produced in the evaporator 14 is transferred by a coil 15 to a coil 16 in a refrigerating cabinet 17, and the amount produced is controlled by an air inlet valve 18 which may be actuated by a bellows 19 communicating with a heat-sensitive capsule 20 in the cabinet 17. The heat-exchanger 8 is inclined to permit unvaporized fuel to drain on to baffles 6 in the intake 5 which is surrounded by a heating jacket 7, any remaining liquid fuel being vaporized by falling on to a hot spot on the lower side of the induction manifold. Alternatively, the fuel may be sucked up from the end of the heat-exchanger into the intake 5 if the exchanger is below it. If the fuel drains into a float-controlled chamber, this may be opened to the atmosphere when the throttle is opened and provide fuel for acceleration. As shown in Fig. 5, two stage evaporation is used, the carburetter 13 delivering first to a chamber 40 where evaporation of the more volatile constituents produces cold for making ice and then to an evaporator 42 suitable for cooling a room, e.g. a refrigerator van. The evaporator 42 is flanged at 43 and may be disposed in a stream of warm air to ensure the evaporation. The cold control valve is disposed between the two evaporators 40, 42. The carburetter and evaporators may be disposed in the front of and at the top of the body of refrigerator van &c.