Benelli TNT125 - Fuel Pump; Working of Fuel Pump

Fuel pump
Working of Fuel Pump
Fuel pump assembly provides the gas to engine
with 250Kpa gasoline pressure to meet system
requirements. It is installed at the bottom of tank to
provide
the required fuel oil to engine through the
connecting pipes.
●Fuel pump:
The electrical principle of electric fuel pump is that:
when DC motor is driving the fuel pump with
turbine-type structure to run, the fuel oil in the
circumferential grooves of turbine rotor will move at a
high speed with the turbine motor. Due to the
centrifugal force generated by the high speed, the fuel
oil pressure at the outlet is increased, meanwhile, the
turbine in high speed rotation will generate a certain
vacuum at the inlet of fuel pump, and thus fuel oil is
sucked into the turbine blade space from the inlet. The
differential pressure between the inlet and outlet may
cause fuel oil to be sucked by the fuel pump to the
outlet side and delivered to the fuel pipe of system. The
fuel oil delivery pressure generated by the fuel pump
may be up to 250kPa.
●Pr
essure regulator:
It is mechanical diaphragm type, and can be used
to make pressure regulation to fuel pump device, so as
to achieve the constant fuel pressure required by the
system.
- 146 -