FUEL FEED DEVICE FOR INTERNAL COMBUSTION ENGINE Russian patent published in 1996 - IPC

FIELD: mechanical engineering; internal combustion engines operating on different fuels. SUBSTANCE: device has carburetor 1 with fuel air bleed well 7, fuel tank 9, accelerating pump 11 and gas supply system with gas cylinder 12 and reducer 13, gas evaporator-heater 14, filter with electromagnetic valve 15, low pressure reducer 16 with gas flow controller which has three spaces: low pressure space 22, command pressure space and discharge pressure space 46. Low pressure space 22 is additionally connected through cutoff device 28 of idle fuel system and to main air channel 2 of carburetor 1, and discharge pressure space 46 communicates with input of main air channel 2 of carburetor 1 and it accommodates spring 48 with adjusting screw 49 and device 52 disconnecting it from diaphragm 18. To improve reliability, return space 37 of vacuum unloader 31 is placed in communication with low pressure space 22 of gas flow controller. Device 52 disconnecting spring from larger diameter diaphragm 18 and device cutting off delivery of gaseous fuel into idle fuel system are connected to each other. EFFECT: possibility of operation on gasoline, gasoline-gas mixture or gaseous fuel only, improved accuracy of fuel metering at all operating conditions. 2 cl, 1 dwg