INTERNAL COMBUSTION ENGINE SUPPLY DEVICE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; preparation of fume-air mixture from liquid fuel to supply internal combustion engine. SUBSTANCE: device has evaporator 1 made in form of four-stage "tube-in tube" heat exchanger installed in exhaust manifold 2 and furnished with liquid fuel meter and ejector spacers 3, 4 of gaseous fuel installed before throttle valves 5. Evaporator 1 is connected with meter and ejector spacer through pipes 6, 7, 8. Meter is connected with float chamber 9 through channels 10, 11 as communicating vessels and is made in form of vertical vessel with elongated outlet union 12 at the bottom provided with well 13 in its upper portion and hole 14 of definite section in well bottom and two holes 15 of definite section on side wall, these holes are arranged at equal distance from upper edge of well. Needle 17 is passed into well 13 through hole 14 and is connected with spring-loaded diaphragm 16 whose space at spring side is connected by vacuum line to tapering zone 21 of air duct of primary throttle valve 5 through union 18, pipeline 19 and union 20. Ejector spacer consists of two plates 3, 4 and has two holes with ring grooves 22 around the plates, distributing manifold 23 with supply unions 24 and 25 and union 29 connected by pipeline 30 with union 31 installed on suction manifold 32 in zone behind primary throttle valve 5. It has channels 33 connecting ring grooves 22 with supply unions 24 and 25, channel 34 connecting idle system 35 of throttle valve housing with channel of supply union 24 to primary throttle valve. Evaporator 1 has two diametrically arranged outlet unions 36 and 37 and one central supply union 38. Supply union 38 has two concentrically arranged tubular inserts 39 and 40. Housing of evaporator 1 has one insert 41 at side of bottom. Inserts are relatively arranged to form ring through channels 42, 43, 44 and 45 increasing in steps in direction to outlet unions 36 and 37. EFFECT: improved operation of internal combustion engine. 3 cl, 3 dwg