FUEL-AIR MIXTURE PREPARATION DEVICE Russian patent published in 2002 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: proposed device has housing with primary air channel provided with inlet hole and adjustable choke connected with engine speed governor through linkage. Housing is provided with secondary air channel with inlet hole and outlet hole into primary air channel between adjustable choke and outlet hole of the latter. Secondary air channel opens into chamber at lower end in direction of flow. Outlet hole is arranged along axis of chamber. Hole drilled in housing at other end of chamber is provided with adjustable nozzle to deliver fuel into secondary air channel. Nozzle has bell which accommodates conical needle directed along flow. Device includes also lever mechanism or control device to provide direct coupling or control of position of needle to correspond to position of adjustable choke in primary air channel to change size of hole in nozzle. They are designed to provide required stoichiometric amount of fuel in hole of choke. EFFECT: brought to minimum amounts of noncombusted or incompletely combusted fuel. 22 cl, 7 dwg