METERING ECONOMIZER Russian patent published in 1998 - IPC

FIELD: mechanical engineering; internal combustion engines operating of gaseous fuel; fuel gas pressure control. SUBSTANCE: housing of economizer in its middle part is made in form of different-section cylindrical bores. Sensitive member in form of piston provided with equalizing spring and adjusting screw fitted in cover is installed in larger section bore. Gas control device is installed in smaller section bore. Gas pressure control device is made in form of spool with rod, stop and equalizing spring. Circular groove with radial channels is made on outer surface of spool, and axial channel communicating with radial channels is made along axis. Spool is mechanically coupled with piston Radial channel is made in smaller section bore. Radial channel has fuel mixture quality control screw. Smaller diameter cylindrical bore inner space communicates with inner gas space of economizer. Gas space communicates with carburetor-mixer. EFFECT: enhanced reliability of economizer, increased accuracy and stability of fuel mixture enrichment. 1 dwg