TWO-STAGE REDUCER-EVAPORATOR OF INTERNAL COMBUSTION ENGINE FUEL SYSTEM Russian patent published in 2003 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: invention can be used in fuel systems internal combustion engines operating on liquefied fuel-oil gases. Two-stage reducer-evaporator of internal combustion engine fuel system has housing provided with inlet space communicating with liquefied gas source, high-pressure space and outlet space communicating with engine intake duct. It has high-pressure valve in form of spring-loaded diaphragm installed in high-pressure space to form backpressure chamber and working chamber, and shut-off member mechanically coupled with diaphragm for placing inlet space in communication with high pressure space. Low-pressure valve in form of diaphragm installed in housing to form relief chamber communicating with atmosphere and shutoff member mechanically coupled with diaphragm for placing working chamber of high-pressure valve in communication with outlet space. Corrector in form of diaphragm is installed in housing to form relief and working spaces and is coupled with diaphragm of low-pressure valve. Starting system with starting valve is arranged in housing. Channel for heat carrier used for evaporation of liquefied gas is made in housing. Housing is cylindrical body with central hole for corrector. Ring-shaped channel for delivery of heat carrier is made at one base of housing. Housing is closed by cover with let-in and let-out branch pipes. Outlet space for delivery of gas into engine intake duct and high-pressure space arranged inside outlet space at its side are made at other base of housing. High-pressure space communicates with outlet space through channel in housing body. EFFECT: enlarged operating capabilities of reducer-evaporator owing to improved accuracy of metering and reliability of operation. 10 cl, 6 dwg