Fuel System; Centrifugal Governor - Bukh DV36/48 Workshop Manual

H7

Fuel System

The fuel is pumped by a lift pump (29 from the tank via a fine filter (30) to the internal wing
feed pump. This feed pump gives a constant quantity/revolution.
Through the pressure control valve (31), after the feed pump, a pressure is produced. Most
of the fuel flows through the pressure control valve back to the suction side. The remaining
part of the fuel flows through the inner chamber of the pump (fuel chamber) (25) to the high
pressure chamber of the distributor head and then it is led to cooling and bleeding and then
back to the tank through the overflow throttle (14).
The distributor piston (23) is activated by the drive shaft (2). By means of the cam disc (26)
and the rollers in the roller cage (28) the piston obtains an axial motion besides the rotary
motion.
The delivery (high pressure) takes place by means of the axial motion of the piston. The
distribution to the individual outlets (22) is through a slit in the distributor piston.
The injection stops when the governor slide (24) disengages the transversing hole in the
distributor piston. The fuel flows back into the fuel chamber of the pump (25).
The governor slide (24) is controlled by the centrifugal governor.
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