DEVICE TO CONTROL FUEL DELIVERY IN DIESEL ENGINE WITH CUT-OFF CYLINDERS Russian patent published in 1997 - IPC

FIELD: mechanical engineering; diesel engines; fuel injection devices of diesel engines with cut-off cylinders. SUBSTANCE: device to control fuel delivery to diesel engine with fuel injection pump some elements of which cut off fuel delivery to some engine cylinders at low load and idling has spool valve device providing change in direction of fuel delivery in cut-off pumping elements with periodical alternate cutting off at above indicated modes of operation. Change of direction of fuel delivery in spool valve device installed between fuel injection pump and nozzles is provided by axial displacement of rod 4 on which cross holes and slots 6 are made at angle relative to axis of rod connecting through holes in spool body and pipelines, pumping elements with nozzles of corresponding cylinders depending on one of two axial positions of spool. Devise provides also use of coupling with ratchet gear in fuel injection pump drive for changing angular position of camshaft of fuel injection pump through 180 degrees relative to crankshaft which provides timely injection of fuel into diesel engine cylinders at end of compression stroke depending on position of spool. EFFECT: improved reliability of operation. 4 dwg