Eaton Compressor & Fabrication CONFERENCE SYSTEM SDC 8200 - Manual (Page 6)

6 Eaton Electro-hydraulic Fan Drive System E-SYFD-MROO1-E3 October 2008
Integrated
Fan Drive System
Fixed-displacement Pump
The system cooling strategy
is based on one ECM input,
two Temperature Inputs and
two Digital Inputs. In some
cases, the ECM signal is too
noisy or too weak to control
a hydraulic circuit. The TCA
or EFX solution amplifies and
conditions the ECM signal to
be used on a hydraulic circuit.
A fixed displacement pump
fan drive system is suited for
a smaller and simpler cooling
system. A fixed displacement
pump is unable to alter it’s
displacement to slow the fan
speed with respect to the
cooling demand. The excess
flow generated by the pump
is returned to the tank, which
leads to generation of heat
and energy losses.
Fixed displacement pumps
are best suited for Fan Drive
Systems below 10 HP.
Inputs from sensors
and the engine TCA/EFX