FUEL SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE Russian patent published in 1995 - IPC

FIELD: engine engineering. SUBSTANCE: system has housing 1 of carburetor with flow passageway 3 and throttle slide valve 4, sprayer 5 which underlies the slide valve and is connected with float chamber 7 through fuel supplying passageway 6, and batching needle 8 received in the opening of sprayer 5. Main air supplying passageway 11 and additional air supplying passageway 12 are made in housing 1. The passageways are provided with check valves 13 and 14 and connected with throttle space 3 and a source of higher pressure respectively. Nozzle 15 is mounted inside the housing to define ring slot 16 around sprayer 5. During suction stroke, fuel is fed from sprayer 5 to the air flowing through passageway 3. Simultaneously, when check valve 13 is open, additional air is fed through the main passageway. The additional air sucks fuel from sprayer 5 resulting in correcting mixture composition and intensifying fuel evaporation. During compression stroke, main passageway 11 is overlapped, and, when check valve 14 is open, compressed air is fed through additional passageway 12, sucks flow from sprayer 5, and provide diluted mixture in passageway 3 before the beginning of suction stroke, the fuel being evaporated in the mixture. Thus fuel is almost constantly fed from sprayer 5, and compressed air heats housing 1 of carburetor preventing against freezing. EFFECT: enhanced quality of spraying. 1 dwg