GB561359A - Improvements in devices for supplying starting fuel to internal combustion engines - Google Patents

Abstract

561,359. Supply of starting-fuel to internal - combustion engines. AKTIEBOLAGET AEROTRANSPORT. Nov. 30, 1942, No. 17025. Convention date, Dec. 1, 1941. [Class 7 (v)] A device for supplying starting fuel to internal-combustion engines, particularly aircraft engines, by means of an injection nozzle opening into the inlet channel of the engine, has a closed tank containing starting fuel under pressure removably connected to the injection nozzle'through a valve, which is normally closed but can be opened from a remote control on starting the engine. The tank may be about two-thirds full of high vapour-pressure fuel and filled with inert gas under pressure. The tank is removably mounted in a bracket 2 adjacent the engine and is connectible to mounting and coupling means 3 also carried on the bracket. A stationary part 5 screwed to a fitting 7'includes a connecting nipple 11 and non-return valve 10 and has a longitudinal bore 8. The tank has a flanged neck 15 enclosing sealing washers 18, 19 and an inturned member 17 which retains a .spring-pressed washer 21. A part 22 .of the tank encloses a spring-pressed valve disc 24 which when the tank is clear of the coupling engages the packing 19 and .seals the tank. A coupling .socket 6 retains two segmental pieces 13 against the bottom of the member 17, the arrangement ,being .such that the tank may !be quickly coupled by slipping the coupling end over the stationary part 5 and rotating the coupling 6 so that the segments 13 engage under segmental shoulders 12 on the part 5. When the coupling is made, the disc 24 is lifted so that fuel can flow through the bore 8 and through the hose 43, Fig. 5, to the injecting nozzle unit which consists of a fitting 26 provided with an atomiser 28. A housing 30 screwing into fitting 26 carries a slidable iron core 33 operated by a solenoid 32. The core encloses the stem 34 of a needle valve 31 guided by pins 35 on the core. The -stem carries a perforated disc 37 having slight clearance in the housing. A spring 39 normally holds the valve closed, but when the solenoid is energized the iron core compresses a spring 38 and then opens the valve against the fuel pressure. The solenoid is -preferably connected in parallel with the starting coil or with the starter motor so that starting fuel is automatically supplied when the starter is pressed. 'When the fuel tank is exhausted, it may be quickly removed and replaced by a fresh tank. Instead of being mounted on the plane, the tank may be mounted on a servo carriage on the airfield.