PUMP DEVICE FOR SYSTEM MAINTAINING EVAPORATION OF FUEL AND SYSTEM USING SUCH DEVICE Russian patent published in 2000 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: proposed device is furnished with valves designed for building rarefaction which are made so that, with regenerating valve open and cutoff valve closed, low resistance to flow is provided owing to sufficiently large cross- section of flow A_schutz. Thanks to it possibility of fuel tank damage caused by rise of rarefaction is excluded. EFFECT: improved reliability of systems maintaining fuel evaporation within preset limits by excluding possibility of fuel tank damage. 8 cl, 1 dwg